To see the other types of publications on this topic, follow the link: Atlantic Waters.
Journal articles on the topic 'Atlantic Waters'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Atlantic Waters.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
SCARABINO, FABRIZIO, RUDÁ AMORIM LUCENA, TOMÁS MUNILLA, et al. "Pycnogonida (Arthropoda) from Uruguayan waters (Southwest Atlantic): annotated checklist and biogeographic considerations." Zootaxa 4550, no. 2 (2019): 185. http://dx.doi.org/10.11646/zootaxa.4550.2.2.
Full textAbstract:
Records of pycnogonids from Uruguayan waters (south-western Atlantic) include 26 species cited from precise locations, and at least five other species based on unconfirmed records. Nearly half of the species in that fauna belong to the genus Nymphon (12 spp.). Most species (22) come from deep-water and were recorded and described by C. A. Child. Of these, at least twelve species have an extended Antarctic and Subantarctic distribution, showing the influence of these cold waters in the area; three others have a wide deep-sea distribution pattern. Five species are known only from the lower slope and abyssal basin off La plata river: Mimipallene Atlantis and four species of Nymphon. Records from coastal and shelf areas (four species) are poorly documented and should be the focus of future research. Of these, Colossendeis geoffroyi is considered endemic in the Southwest Atlantic between 34ºS and 40ºS, but presents clear Antarctic affinities. A small-sized species living in shallow waters, Pycnogonum cessaci, is here considered as cryptogenic.
2
Imber, Michael J. "Kermadec petrels (Pterodroma neglecta) at Ilha da Trindade, South Atlantic Ocean and in the North Atlantic." Notornis 51, no. 1 (2004): 33. https://doi.org/10.63172/356004vmvegb.
Full textAbstract:
Kermadec petrels (Pterodroma neglecta) are shown to be resident in the Atlantic Ocean, breeding at Ilha da Trindade, off Brazil, South Atlantic Ocean and migrating to the North Atlantic. Previously mistaken for Trindade petrels (Pterodroma arminjoniana) at Ilha da Trindade, they were identified by the whitish shafts and largely white inner webs of their primaries and, at the colony, by their distinctive call. Records of five non-breeding Kermadec petrels in the North Atlantic Ocean include the first Atlantic specimen from western United Kingdom in 1908. All of eight identifications of Kermadec petrels from Atlantic waters were dark phase birds, like those identified from the Indian Ocean, though, in the Pacific Ocean, the species is polymorphic. Trindade petrels from Ilha da Trindade are mostly the light phase (59%, n = 71), outnumber Kermadec petrels there by about 20:1 in collections, and disperse into the North Atlantic Ocean. As 70% (n = 43) of these two species combined observed at sea in the North Atlantic were dark phase, about 49% of North Atlantic records may have been Kermadec petrels. As they are in Pacific waters, Kermadec petrels may be more migratory and reach higher latitudes than do Trindade petrels. The Halipeurus feather louse hosted by Kermadec petrels in the Pacific Ocean has been identified from both petrels in Atlantic waters, but that hosted by Trindade petrels elsewhere has not been reported from Atlantic waters, possibly indicating earliest colonisation by Kermadec petrels. The morphometrics of Trindade petrels in the Atlantic Ocean cannot be established accurately until the generally larger Kermadec petrels are excluded from data sets.
3
ALVES-JÚNIOR, FLAVIO DE ALMEIDA, RACHEL DE JESUS FEIO DE LEMOS, IRENE AZEVEDO CARDOSO, MARINA DE SÁ LEITÃO CÂMARA DE ARAÚJO, ARNAUD BERTRAND, and JESSER F. SOUZA-FILHO. "New records of deep-sea prawn of the genus Gennadas Spence Bate, 1881 (Crustacea: Decapoda: Benthesicymidae) from Southwestern Atlantic." Zootaxa 4450, no. 3 (2018): 376. http://dx.doi.org/10.11646/zootaxa.4450.3.4.
Full textAbstract:
Here, we report the new occurrences of four deep-water prawn of the genus Gennadas in the southwestern Atlantic: G. gilchristi recorded from the Mid-Atlantic Ridge region; G. capensis recorded from Brazilian waters off Fernando de Noronha Archipelago, Atol das Rocas and Ceará Chain; G. talismani and G. scutatus recorded both to Mid-Atlantic Ridge and to Brazilian waters.
4
Paterne, Martine, Nathalie Feuillet, Guy Cabioch, et al. "Reservoir Ages in the Western Tropical North Atlantic from One Coral off Martinique Island (Lesser Antilles)." Radiocarbon 60, no. 2 (2018): 639–52. http://dx.doi.org/10.1017/rdc.2017.118.
Full textAbstract:
AbstractSea surface reservoir ages (R) are reported from radiocarbon (14C) measurements of the annual growth bands of coral Siderastrea siderea collected on the Atlantic coast off Martinique Island, in the Lesser Antilles volcanic arc. Mean values of R are similar between 1835 and 1845 during pre-anthropogenic times at 385±30 yr and between 1895 and 1905 at 382±20 yr when there was a huge eruption from the Montagne Pelée volcano in 1902–1903. Limited 14C aging of sea surface (~40 yr) may be due to enhanced volcanic activity. Variability of R is slightly greater during 1835–1845 than during 1895–1905. It is linked to a moderate increase of ∆14C of 5‰, strengthened by a clear increase of δ18O of 0.4‰. This is attributed to a decrease of the northward advection of the South Atlantic Waters into the western tropical North Atlantic and Caribbean Sea and relative enhanced westward flux of the tropical North Atlantic surface waters, the southern waters having lower values of 14C and δ18O than the North Atlantic ones. From 1835 to 1845, the fraction of the South Atlantic Waters transported up to Martinique Island was reduced from 25% to 15%.
5
Bastien, G., A. Barkley, J. Chappus, et al. "Inconspicuous, recovering, or northward shift: status and management of the white shark (Carcharodon carcharias) in Atlantic Canada." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 10 (2020): 1666–77. http://dx.doi.org/10.1139/cjfas-2020-0055.
Full textAbstract:
Although white sharks (Carcharodon carcharias) have been considered rare in Atlantic Canada waters, recent sighting records indicate a potentially increasing presence. We combine historical to present sighting data with satellite telemetry tracks of large juvenile and adult white sharks tagged in US (n = 9) and Atlantic Canada waters (n = 17) to show seasonal white shark presence and distribution in Atlantic Canada, returns by individuals over multiple years, and high site fidelity to the region. Telemetry data indicate that white sharks are a more common and consistent occurrence in Canadian waters than previously thought, presenting two potential scenarios: (i) tagging technology is revealing white shark presence that was historically cryptic and (or) (ii) a northward range expansion of white sharks in the Northwest Atlantic, potentially due to climate change, population recovery, and (or) increasing pinniped prey. Given combined sighting and telemetry data indicate a current need for proactive management of white sharks in Atlantic Canada waters, we propose the basis for a management action plan, addressing conservation priorities, management goals, and research incentives while considering the potential for human–shark interactions.
6
Eduardo, Leandro Nolé, Bárbara Teixeira Villarins, Julia Rodrigues Martins, et al. "Deep-sea oceanic basslets (Perciformes, Howellidae) from Brazil: new records and range extensions." Check List 15, no. 6 (2019): 965–71. http://dx.doi.org/10.15560/15.6.965.
Full textAbstract:
This study reports the occurrence of the oceanic basslet (Howellidae) in Brazilian waters. Bathysphyraenops simplex Parr, 1933, a rare species with a worldwide distribution, is recorded for the first time in Brazilian waters, based on three specimens collected off Rocas Atoll and Rio Grande do Norte. Howella atlantica Post & Quéro, 1991, known from the western and eastern Atlantic Ocean (64°N to 21°S), including waters around the Trindade Island, is reported off Rio Grande do Norte, Pernambuco, Rocas Atoll, and the Fernando de Noronha Archipelago. In addition, specimens previously reported in the literature as Howella brodie Ogilby, 1899 are reidentified as H. atlantica, extending the known distribution of this species to northeastern and southeastern Brazil. Measurements and counts for all specimens examined are provided.
7
Sizov, A. A., T. M. Bayankina, and V. L. Pososhkov. "FORMATION OF WINTER SURFACE TEMPERATURE ANOMALIES IN THE NORTH ATLANTIC IN DECADES OF NEGATIVE AND POSITIVE VALUES OF THE NORTH ATLANTIC OSCILLATION INDEX." Доклады Российской академии наук. Науки о Земле 509, no. 2 (2023): 259–64. http://dx.doi.org/10.31857/s2686739722602824.
Full textAbstract:
An analysis of the variability of the winter surface temperature anomaly in the North Atlantic in decades of negative and positive values of the North Atlantic Oscillation Index is presented. It was found that in the decade with negative values of the North Atlantic Oscillation Index, the slope waters of the Gulf Stream system and Labrador Current waters decrease the temperature of the Gulf Stream at the mixing zone on the Scotia Peninsula shelf and in the area of the quasistationary anticyclonic vortex to a maximum. In the decade with positive values of the North Atlantic Oscillation Index, the temperature of the slope waters is close to the climate. Taking into account the increased speed of the Gulf Stream in the years with positive values of the North Atlantic Oscillation Index, the spreading of the surface ocean temperature anomaly over the North Atlantic water area occurs for a shorter time than in the years with its negative values.
8
Homrum, Eydna í., Bogi Hansen, Sigurður Þór Jónsson, et al. "Migration of saithe (Pollachius virens) in the Northeast Atlantic." ICES Journal of Marine Science 70, no. 4 (2013): 782–92. http://dx.doi.org/10.1093/icesjms/fst048.
Full textAbstract:
Abstract Homrum, E. í, Hansen, B., Jónsson, S. Þ., Michalsen, K., Burgos, J., Righton, D., Steingrund, P., Jakobsen, T., Mouritsen, R., Hátún, H., Armannsson, H., and Joensen, J. S. 2013. Migration of saithe (Pollachius virens) in the Northeast Atlantic. – ICES Journal of Marine Science, 70: 782–792. Saithe (Pollachius virens) stocks in the Northeast Atlantic intermingle as a result of migration among stock areas. The extent of migration has been poorly quantified. Here, we estimate measures of the migration based on existing tagging data from Icelandic, Faroese and Continental (Scotland, North Sea and Norway) waters. Saithe tagged in Icelandic waters were seldom caught outside Icelandic waters (<1% of tag returns), whereas 42% of adult saithe tagged in Faroese waters were recaptured outside Faroese waters. Of adult saithe tagged in Norwegian waters 6.6% were recaptured outside Continental waters. In broad terms, there was a net migration of saithe towards Icelandic waters. The distance between tagging and recapture increased with increasing size and age, with saithe tagged in Norwegian waters moving the longest distances. The results demonstrate significant, but variable, migration rates of adult saithe in the Northeast Atlantic. More detailed studies are needed to clarify the mechanisms behind the migration and what causes the differences among the areas.
9
Eduardo, Leandro Nolé, Villarins Bárbara Teixeira, Martins Julia Rodrigues, et al. "Deep-sea oceanic basslets (Perciformes, Howellidae) from Brazil: new records and range extensions." Check List 15, no. (6) (2019): 965–71. https://doi.org/10.15560/15.6.965.
Full textAbstract:
This study reports the occurrence of the oceanic basslet (Howellidae) in Brazilian waters. <em>Bathysphyraenops simplex</em> Parr, 1933, a rare species with a worldwide distribution, is recorded for the first time in Brazilian waters, based on three specimens collected off Rocas Atoll and Rio Grande do Norte. Howella atlantica Post & Quéro, 1991, known from the western and eastern Atlantic Ocean (64°N to 21°S), including waters around the Trindade Island, is reported off Rio Grande do Norte, Pernambuco, Rocas Atoll, and the Fernando de Noronha Archipelago. In addition, specimens previously reported in the literature as <em>Howella brodie</em> Ogilby, 1899 are reidentified as <em>H. atlantica</em>, extending the known distribution of this species to northeastern and southeastern Brazil. Measurements and counts for all specimens examined are provided.
10
James, Travis L., Sean J. Landsman, Laura L. Ramsay, Melanie D. Giffin, Arnault Le Bris, and Michael R. van den Heuvel. "Migration patterns of Atlantic halibut captured in the southern Gulf of St. Lawrence as assessed with pop-up satellite archival and Floy tags." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 7 (2020): 1233–42. http://dx.doi.org/10.1139/cjfas-2019-0262.
Full textAbstract:
This study provides evidence of two subpopulations of Atlantic halibut (Hippoglossus hippoglossus) in the southern Gulf of St. Lawrence. The migrations of 20 Atlantic halibut captured in the coastal waters of Prince Edward Island, Canada, were evaluated using pop-up satellite archival tags (PSAT). Geolocation data showed that Atlantic halibut migrated north to the Laurentian Channel via distinct eastern or western routes. Floy tagging and recapture (recapture of 18.4%) showed that less than 7.0% of Atlantic halibut exhibited dispersive behaviour outside of their annual migratory route. Overwintering occurred on the slope and in the deepest waters of the Laurentian Channel. Atlantic halibut in the deepest waters of the Laurentian Channel exhibited rapid, ∼100 m rises, presumed to be associated with spawning from January to March. The eastern and western migratory cohorts exhibited this behaviour ∼350 km apart, suggesting reproductive isolation as the basis of subpopulations. The results of this study indicate a need to reconsider the management of Gulf of St. Lawrence Atlantic halibut as one continuous population.
11
Reverter-Gil, Oscar, and Javier Souto. "Watersiporidae (Bryozoa) in Iberian waters: an update on alien and native species." Marine Biodiversity 49, no. 6 (2019): 2735–52. http://dx.doi.org/10.1007/s12526-019-01003-4.
Full textAbstract:
AbstractSpecies of the genus Watersipora comprise an important invasive fouling group but are difficult to identify up to species level. This problem, in conjunction with the recent re-description of several member species, requires the revision of previous records and newly collected material in order to more precisely determine their actual presence and distribution. Here, we revise the identity and distribution of alien and native species of Watersiporidae in Iberian waters based on newly collected material, historical collections, and bibliographic data. Four species of Watersipora are now known from here. Watersipora cucullata is the only native species, present in the Spanish Mediterranean. Watersipora subatra seems to have been introduced relatively recently in Iberian and European Atlantic waters and has been expanding to other Atlantic localities. Watersipora arcuata was collected for the first time in Europe at the SW Spanish Atlantic coast in 1990 and recently in Mediterranean marinas. Watersipora souleorum is known in Iberian waters from two localities in the Gulf of Cadiz and in Gibraltar. With the recent redescription of the genus Watersipora, W. complanata is no longer a member. A new watersiporid genus, Terwasipora gen. nov., is described for this species. In Iberian waters, T. complanata comb. nov. is considered a native species, frequent and abundant in shallow waters along the Atlantic coast.
12
Pautova, Larisa A., Vladimir A. Silkin, Marina D. Kravchishina, Valeriy G. Yakubenko, and Anna L. Chultsova. "Summer phytoplankton of the northern Barents Sea (75–80º N)." Hydrosphere Еcology (Экология гидросферы), no. 2(4) (2019): 8–19. http://dx.doi.org/10.33624/2587-9367-2019-2(4)-8-19.
Full textAbstract:
The structure of the summer planktonic communities of the Northern part of the Barents sea in the first half of August 2017 were studied. In the sea-ice melting area, the average phytoplankton biomass producing upper 50-meter layer of water reached values levels of eutrophic waters (up to 2.1 g/m3). Phytoplankton was presented by diatoms of the genera Thalassiosira and Eucampia. Maximum biomass recorded at depths of 22–52 m, the absolute maximum biomass community (5,0 g/m3) marked on the horizon of 45 m (station 5558), located at the outlet of the deep trench Franz Victoria near the West coast of the archipelago Franz Josef Land. In ice-free waters, phytoplankton abundance was low, and the weighted average biomass (8.0 mg/m3 – 123.1 mg/m3) corresponded to oligotrophic waters and lower mesotrophic waters. In the upper layers of the water population abundance was dominated by small flagellates and picoplankton from, biomass – Arctic dinoflagellates (Gymnodinium spp.) and cold Atlantic complexes (Gyrodinium lachryma, Alexandrium tamarense, Dinophysis norvegica). The proportion of Atlantic species in phytoplankton reached 75%. The representatives of warm-water Atlantic complex (Emiliania huxleyi, Rhizosolenia hebetata f. semispina, Ceratium horridum) were recorded up to 80º N, as indicators of the penetration of warm Atlantic waters into the Arctic basin. The presence of oceanic Atlantic species as warm-water and cold systems in the high Arctic indicates the strengthening of processes of “atlantificacion” in the region.
13
Díaz, Xiomara Franchesca García, Lucia Maria de Oliveira Gusmão, and Sigrid Neumann-Leitão. "New record of Thalia cicar van Soest 1973 (Urochordata: Thaliacea) in the Equatorial Atlantic." Biota Neotropica 8, no. 3 (2008): 99–104. http://dx.doi.org/10.1590/s1676-06032008000300009.
Full textAbstract:
Thalia cicar van Soest 1973 (Urochordata, Thaliacea) is considered a tropical-subtropical species, registered in the Atlantic Ocean at latitudes between 7-34º S and 6-32º N. This work enlarges the occurrence of this species for Equatorial Atlantic waters. The specimens were found in a shelf break area of the Brazilian northeastern (07º 50'-07º 70' S and 34º 23' W) during the expedition JOPS-II (Joint Oceanographic Projects II) in March 1995; and, in São Pedro e São Paulo arquipelago (0º 55' N and 29º 20' W) in May and June, 2005. These two areas are characterized by the presence of local upwelling that induces the ascent of bottom waters rich in nutrients, generating areas of larger productivity than the typically oligotrophic Equatorial Atlantic waters. The new occurrence of Thalia cicar reported in this work can be related to these more productive waters of Equatorial Atlantic. The species that is most commonly found in the Atlantic Ocean is T. democratica, and the lack of past records of T. cicar might have been caused by the taxonomic difficulties determining of the solitary and aggregate zooids of these two species. This work suggests the potential use of the ratios among tunic lengths as an additional character to differentiate T. cicar and T. democratica oozooids.
14
Dulaquais, G., M. Boye, M. J. A. Rijkenberg, and X. Carton. "Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean." Biogeosciences 11, no. 6 (2014): 1561–80. http://dx.doi.org/10.5194/bg-11-1561-2014.
Full textAbstract:
Abstract. The distributions of the bio-essential trace element dissolved cobalt (DCo) and the apparent particulate Co (PCo) are presented along the GEOTRACES-A02 deep section from 64° N to 50° S in the western Atlantic Ocean (longest section of international GEOTRACES marine environment program). PCo was determined as the difference between total cobalt (TCo, unfiltered samples) and DCo. DCo concentrations ranged from 14.7 pM to 94.3 pM, and PCo concentrations from undetectable values to 18.8 pM. The lowest DCo concentrations were observed in the subtropical domains, and the highest in the low-oxygenated Atlantic Central Waters (ACW), which appears to be the major reservoir of DCo in the western Atlantic. In the Antarctic Bottom Waters, the enrichment in DCo with aging of the water mass can be related to suspension and redissolution of bottom sediments a well as diffusion of DCo from abyssal sediments. Mixing and dilution of deep water masses, rather than scavenging of DCo onto settling particles, generated the meridional decrease of DCo along the southward large-scale circulation in the deep western Atlantic. Furthermore, the apparent scavenged profile of DCo observed in the deep waters likely resulted from the persistence of relatively high concentrations in intermediate waters and low DCo concentrations in underlaying bottom waters. We suggest that the 2010 Icelandic volcanic eruption could have been a source of DCo that could have been transported into the core of the Northeast Atlantic Deep Waters. At intermediate depths, the high concentrations of DCo recorded in the ACW linearly correlated with the apparent utilization of oxygen (AOU), indicating that remineralization of DCo could be significant (representing up to 37% of the DCo present). Furthermore, the preferential remineralization of phosphate (P) compared to Co in these low-oxygenated waters suggests a decoupling between the deep cycles of P and Co. The vertical diffusion of DCo from the ACW appears to be a significant source of DCo into the surface waters of the equatorial domain. Summarizing, the dilution due to mixing processes rather than scavenging of DCo and the above-mentioned remineralization could be the two major pathways controlling the cycling of DCo into the intermediate and deep western Atlantic.
15
Dulaquais, G., M. Boye, M. J. A. Rijkenberg, and X. Carton. "Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic ocean." Biogeosciences Discussions 10, no. 10 (2013): 15951–6001. http://dx.doi.org/10.5194/bgd-10-15951-2013.
Full textAbstract:
Abstract. The distributions of the bio-essential trace element dissolved Co (DCo) and the apparent particulate Co (PCo) are presented along the GEOTRACES-A02 deep section from 64° N to 50° S in the West Atlantic Ocean. PCo was determined as the difference between total cobalt (TCo, unfiltered samples) and DCo. DCo concentrations ranged from 14.7 pM to 94.3 pM, and PCo concentrations from undetectable values to 18.8 pM. The lowest DCo concentrations were observed in the subtropical domains, and the highest in the low-oxygenated Atlantic Central Waters (ACW) that appeared to be the major reservoir of DCo in the West Atlantic. In the Antarctic Bottom Waters, the enrichment in DCo with ageing of the water-mass can be related to suspension and redissolution of bottom sediments a well as diffusion of DCo from abyssal sediments. Mixing and dilution of deep water-masses, rather than scavenging of DCo onto settling particles, generated the meridional decrease of DCo along the southward large-scale circulation in the deep West Atlantic. Furthermore the apparent scavenged profile of DCo observed in the deep waters likely resulted from the persistence of relatively high concentrations in intermediate waters and low DCo concentrations in underlaying bottom waters. We suggested that the 2010 Icelandic volcanic eruption can be a source of DCo that could have been transported in the core of the North-East Atlantic Deep Waters. At intermediate depths, the high concentrations of DCo recorded in the ACW linearly correlated with the apparent utilization of oxygen (AOU), indicating that remineralization of DCo can be significant (representing up to 29% of the DCo present). Furthermore the preferential remineralization of phosphate (P) compared to Co in these low-oxygenated waters suggested a decoupling between the deep cycles of P and Co. The vertical diffusion of DCo from the ACW appeared to be a significant source of DCo into the surface waters of the equatorial domain. Summarizing the dilution and mixing processes rather than scavenging of DCo, and the remineralization can be the two major pathways controlling the cycling of DCo in the intermediate and deep West Atlantic.
16
Diansky, N. A., and V. A. Bagatinsky. "The thermohaline structure of the North Atlantic waters in different phases of the Atlantic multidecadal oscillation." Известия Российской академии наук. Физика атмосферы и океана 55, no. 6 (2019): 157–70. http://dx.doi.org/10.31857/s0002-3515556157-170.
Full textAbstract:
The meridional structure of climatic trends and anomalies of potential temperature and salinity in the North Atlantic waters in different periods of the Atlantic Multidecadal Oscillation (AMO) in 19482017 are studied based on the EN4 and WOA2013 objective analyses data. An analysis of these different data sets allowed us to reveal almost identical patterns of variability of the thermohaline fields of the North Atlantic, which increases the reliability of the results. Long-term temperature and salinity trends simulated over the period 19482017 show that warming and salinization of water occur in the upper ~1 km layer of the North Atlantic. On the contrary, cooling and freshening of deep waters are observed, which is associated with the melting of the Greenland ice sheet, transport of fresher waters from the Arctic Ocean, and deepening of these cold and fresher waters into the deeper layers. Composite analysis of the zonally averaged temperature and salinity anomalies of the North Atlantic waters after removing the trends showed that in the warm AMO periods warming and salinization of waters are observed in the upper 1-km layer of the North Atlantic when compared to the cold periods based both on the EN4 and WOA2013 data. Below the 1-km layer, significant regions of cooling and freshening are observed; this distribution is more pronounced in the EN4 data. Analysis of the dynamics of zonally averaged temperature and salinity anomalies in the successive periods associated with the temporal variability of the AMO index revealed that these anomalies propagate along the zonally averaged meridional thermohaline circulation. To show this using the Institute of Numerical Mathematics Ocean Model (INMOM), the stream function of the Atlantic Meridional Overturning Circulation (AMOC) was simulated. It is shown that positive and negative anomalies of both temperature and salinity circulate along the water motion in the AMOC around its core, descending down into the deep ocean layers approximately at 60 N and ascending to the surface at 25 N, replacing each other with a period of about 60 years. It can be assumed that due to this process both the warm and cold phases of the AMO are formed.
17
Lozier, M. Susan, and Laurie Sindlinger. "On the Source of Mediterranean Overflow Water Property Changes." Journal of Physical Oceanography 39, no. 8 (2009): 1800–1817. http://dx.doi.org/10.1175/2009jpo4109.1.
Full textAbstract:
Abstract A recent study of the eastern North Atlantic detailed significant increases in the temperature and salinity of the Mediterranean Overflow Water (MOW) from 1950 to 2000. To examine the degree to which the source waters, which spill over the sill at the Strait of Gibraltar, could be responsible for these observations in the open Atlantic, a box model of water mass transformation by marginal seas was employed. Time series for the salinity of the inflowing North Atlantic surface waters, freshwater fluxes in the Mediterranean (evaporation and precipitation and river runoff), and the volumetric flow rates for the inflow and outflow across the Strait of Gibraltar were used to predict the salinity of the source waters to the North Atlantic from 1950 to 2000. Results from this calculation reveal that source water changes have minimal impact on MOW property changes on interannual and decadal time scales. It is suggested instead that circulation changes within the open Atlantic alter the advective–diffusive pathways of MOW such that property changes within the MOW reservoir are created.
18
de Vera, Alejandro, and Roger R. Seapy. "Atlanta selvagensis, a new species of heteropod mollusc from the Northeastern Atlantic Ocean (Gastropoda: Carinarioidea)." Vieraea Folia scientiarum biologicarum canariensium 34, Vieraea 34 (2006): 45–54. http://dx.doi.org/10.31939/vieraea.2006.34.06.
Full textAbstract:
A new species of atlantid heteropod, Atlanta selvagensis, is described on the basis of external shell structure and pigmentation, and the morphologies of the eye and operculum. All specimens were collected from waters around the Selvagens Islands in the eastern North Atlantic Ocean. Species of Atlanta that share similar features with A. selvagensis are A. peroni, A. gaudichaudi and A. plana.
19
ALVES-JÚNIOR, FLAVIO DE ALMEIDA, MARINA DE SÁ LEITÃO CÂMARA DE ARAÚJO, and JESSER F. SOUZA-FILHO. "New records of deep-sea shrimps of family Solenoceridae Wood-Mason & Alcock, 1891 (Crustacea: Decapoda: Dendrobranchiata) from Southwestern Atlantic." Zootaxa 4254, no. 4 (2017): 473. http://dx.doi.org/10.11646/zootaxa.4254.4.4.
Full textAbstract:
This paper reports the occurrence of four deep waters shrimps of the family Solenoceridae in the southwestern Atlantic, Brazil. The rare Hadropenaeus modestus is collected for the second time from Brazilian waters after 138 years, filling the gaps on its distributional pattern. Mesopenaeus tropicalis is a new register for Potiguar basin, although it is common along Brazilian coast. Hymenopenaeus chacei and H. laevis are recorded for the first time in southwestern Atlantic. The records of these species in the southwestern Atlantic are an important advancement to raise the knowledge of the deep-sea shrimps.
20
González-Paredes, Daniel, Gabriela Vélez-Rubio, Anelise Torres Hahn, María Noel Caraccio, and Andrés Estrades. "New records of Lepidochelys olivacea (Eschscholtz, 1829) (Testudines, Cheloniidae) provide evidence that Uruguayan waters are the southernmost limit of distribution for the species in the western Atlantic Ocean." Check List 13, no. (6) (2017): 863–69. https://doi.org/10.15560/13.6.863.
Full textAbstract:
We report 8 new records of <em>Lepidochelys olivacea</em> marine turtle in the Uruguayan waters, indicating this area as the southernmost limit of distribution for this species in the western Atlantic Ocean. In addition, 1 specimen was subjected to genetic analysis, revealing its population origin in the western Atlantic nesting colonies (Surinam, French Guiana, and Brazil). This report represents an update of the distribution of <em>L. olivacea</em> in the southwestern Atlantic and provides insight into the morphological and genetic characterization of the species at temperate waters.
21
MGHILI, BILAL, IMANE LAMINE, MOHAMED RAMI LAAMRAOUI, MUSTAPHA AKSISSOU, and MARIKA GALANIDI. "Updating the national list of marine alien species in Morocco." Mediterranean Marine Science 25, no. 1 (2024): 231–49. http://dx.doi.org/10.12681/mms.35846.
Full textAbstract:
This study provides an updated list of alien marine species that have been introduced to Morocco by analyzing both previous data and new findings. A total of 46 marine alien and 15 cryptogenic and crypto-expanding species were recorded in Moroccan waters. Alien species are more abundant in the Mediterranean (35 species) than in the Atlantic (16 species) waters. The number of records of introductions increased in recent years in Moroccan waters. Macrophyta ranked first in terms of the number of species (19 species), followed by Mollusca (8 species), Crustacea (7 species), Cnidaria (5 species), Pisces (3 species), and Tunicata (2 species), while Nematoda and Annelida each contain only one species. The finding of Phyllorhiza punctata, a new species recorded for the first time in the Moroccan Mediterranean waters, is described. The Moroccan Mediterranean harbors more established species (77%) than the Atlantic (69%), contrary to casual records (25% in the Atlantic and 20% in the Mediterranean). Within Moroccan waters, 12 species have been identified as either invasive or potentially invasive: Rugulopteryx okamurae, Sargassum muticum, Asparagopsis armata, Asparagopsis taxiformis, Caulerpa cylindracea, Codium fragile, Agarophyton vermiculophyllum, Artemia monica, Callinectes sapidus, Caprella scaura, Microcosmus squamiger, and Branchiomma luctuosum. The Transport- Stowaway pathway accounted for 23 and seven records in the Mediterranean and Atlantic, respectively. In the Mediterranean, the second most frequent pathway was Transport-Contaminant (6 species), while in the Atlantic was Escape (4 species). This list serves as a starting point for management measures and for selecting invasive alien species to assess their impact.
22
Hernandez, Maximiliano Manuel, Sofía Copello, Alexander Borowicz, and Juan Pablo Seco-Pon. "Distribution extension of the Spectacled Petrel (Procellaria conspicillata) off the Argentine continental shelf and oceanic adjacent waters." Revista Brasileira de Ornitologia 27, no. 2 (2019): 135–39. http://dx.doi.org/10.1007/bf03544460.
Full textAbstract:
AbstractThe Spectacled Petrel Procellaria conspicillata is endemic of the Tristan da Cunha Archipelago, in the South Atlantic Ocean. However, it is scarcely detected in waters off Argentina beyond its traditional distribution along the southwest Atlantic during the breeding season. This study compiles distributional records of Spectacled Petrel for the target area (chiefly between 38°S to 46°S and 23°W to 57°W) obtained in situ, from non-systematic observations at sea, between 2015 and 2018 (totaling 4 trips); and by literature review. Nineteen new sightings of the species are presented. In 46 sightings a total of 65 individuals were recorded chiefly within waters of the Argentine continental shelf (< 200 m) (46%) and oceanic adjacent waters (54%). The bulk of the sightings (95%) were obtained during the species breeding season. In addition, we report the southernmost record of the species in oceanic waters for the southwest Atlantic (46°10′S; 57°06′W).
23
Kuijpers, Antoon, Jørn Bo Jensen, Simon R. Troelstra, and And shipboard scientific party of RV Professor Logachev and RV Dana. "Late Quaternary palaeo-oceanography of the Denmark Strait overflow pathway, South-East Greenland margin." Geology of Greenland Survey Bulletin 180 (December 31, 1998): 163–67. http://dx.doi.org/10.34194/ggu-bulletin.v180.6514.
Full textAbstract:
Direct interaction between the atmosphere and the deep ocean basins takes place today only in the Southern Ocean near the Antarctic continent and in the northern extremity of the North Atlantic Ocean, notably in the Norwegian–Greenland Sea and Labrador Sea. Cooling and evaporation cause surface waters in the latter region to become dense and sink. At depth, further mixing occurs with Arctic water masses from adjacent polar shelves. Export of these water masses from the Norwegian–Greenland Sea (Norwegian Sea Overflow Water) to the North Atlantic basin occurs via two major gateways, the Denmark Strait system and the Faeroe– Shetland Channel and Faeroe Bank Channel system (e.g. Dickson et al. 1990; Fig.1). Deep convection in the Labrador Sea produces intermediate waters (Labrador Sea Water), which spreads across the North Atlantic. Deep waters thus formed in the North Atlantic (North Atlantic Deep Water) constitute an essential component of a global ‘conveyor’ belt extending from the North Atlantic via the Southern and Indian Oceans to the Pacific. Water masses return as a (warm) surface water flow. In the North Atlantic this is the Gulf Stream and the relatively warm and saline North Atlantic Current. Numerous palaeo-oceanographic studies have indicated that climatic changes in the North Atlantic region are closely related to changes in surface circulation and in the production of North Atlantic Deep Water. Abrupt shut-down of the ocean-overturning and subsequently of the conveyor belt is believed to represent a potential explanation for rapid climate deterioration at high latitudes, such as those that caused the Quaternary ice ages. Here it should be noted, that significant changes in deep convection in Greenland waters have also recently occurred. While in the Greenland Sea deep water formation over the last decade has drastically decreased, a strong increase of deep convection has simultaneously been observed in the Labrador Sea (Sy et al. 1997).
24
Kuijpers, Antoon, Jørn Bo Jensen, Simon R. Troelstra, and And shipboard scientific party of RV Professor Logachev and RV Dana. "Late Quaternary palaeo-oceanography of the Denmark Strait overflow pathway, South-East Greenland margin." Geology of Greenland Survey Bulletin 180 (December 31, 1998): 163–67. http://dx.doi.org/10.34194/ggub.v180.6514.
Full textAbstract:
Direct interaction between the atmosphere and the deep ocean basins takes place today only in the Southern Ocean near the Antarctic continent and in the northern extremity of the North Atlantic Ocean, notably in the Norwegian–Greenland Sea and Labrador Sea. Cooling and evaporation cause surface waters in the latter region to become dense and sink. At depth, further mixing occurs with Arctic water masses from adjacent polar shelves. Export of these water masses from the Norwegian–Greenland Sea (Norwegian Sea Overflow Water) to the North Atlantic basin occurs via two major gateways, the Denmark Strait system and the Faeroe– Shetland Channel and Faeroe Bank Channel system (e.g. Dickson et al. 1990; Fig.1). Deep convection in the Labrador Sea produces intermediate waters (Labrador Sea Water), which spreads across the North Atlantic. Deep waters thus formed in the North Atlantic (North Atlantic Deep Water) constitute an essential component of a global ‘conveyor’ belt extending from the North Atlantic via the Southern and Indian Oceans to the Pacific. Water masses return as a (warm) surface water flow. In the North Atlantic this is the Gulf Stream and the relatively warm and saline North Atlantic Current. Numerous palaeo-oceanographic studies have indicated that climatic changes in the North Atlantic region are closely related to changes in surface circulation and in the production of North Atlantic Deep Water. Abrupt shut-down of the ocean-overturning and subsequently of the conveyor belt is believed to represent a potential explanation for rapid climate deterioration at high latitudes, such as those that caused the Quaternary ice ages. Here it should be noted, that significant changes in deep convection in Greenland waters have also recently occurred. While in the Greenland Sea deep water formation over the last decade has drastically decreased, a strong increase of deep convection has simultaneously been observed in the Labrador Sea (Sy et al. 1997).
25
de Astarloa, J. M. Díaz, D. E. Figueroa, and R. Reta. "First documented occurrence of the starry toadfish Arothron firmamentum (Teleostei: Tetraodontidae) in the south-west Atlantic." Journal of the Marine Biological Association of the United Kingdom 83, no. 4 (2003): 879–80. http://dx.doi.org/10.1017/s0025315403007963h.
Full textAbstract:
The first documented record of the Indo-west Pacific pufferfish Arothron firmamentum was reported off Mar del Plata, Argentina at a depth of ∼45 m and is the first occurrence of the starry toadfish in American Atlantic waters. Some morphological and biological characteristics are given for the two specimens caught. Different explanations of how the two pufferfish specimens arrived in south Atlantic waters are discussed.
26
Ríos, Aida F., Laure Resplandy, Maribel I. García-Ibáñez, et al. "Decadal acidification in the water masses of the Atlantic Ocean." Proceedings of the National Academy of Sciences 112, no. 32 (2015): 9950–55. http://dx.doi.org/10.1073/pnas.1504613112.
Full textAbstract:
Global ocean acidification is caused primarily by the ocean’s uptake of CO2 as a consequence of increasing atmospheric CO2 levels. We present observations of the oceanic decrease in pH at the basin scale (50°S–36°N) for the Atlantic Ocean over two decades (1993–2013). Changes in pH associated with the uptake of anthropogenic CO2 (ΔpHCant) and with variations caused by biological activity and ocean circulation (ΔpHNat) are evaluated for different water masses. Output from an Institut Pierre Simon Laplace climate model is used to place the results into a longer-term perspective and to elucidate the mechanisms responsible for pH change. The largest decreases in pH (∆pH) were observed in central, mode, and intermediate waters, with a maximum ΔpH value in South Atlantic Central Waters of −0.042 ± 0.003. The ΔpH trended toward zero in deep and bottom waters. Observations and model results show that pH changes generally are dominated by the anthropogenic component, which accounts for rates between −0.0015 and −0.0020/y in the central waters. The anthropogenic and natural components are of the same order of magnitude and reinforce one another in mode and intermediate waters over the time period. Large negative ΔpHNat values observed in mode and intermediate waters are driven primarily by changes in CO2 content and are consistent with (i) a poleward shift of the formation region during the positive phase of the Southern Annular Mode in the South Atlantic and (ii) an increase in the rate of the water mass formation in the North Atlantic.
27
RÍOS, PILAR, and JAVIER CRISTOBO. "Abyssocladia vaceleti (Porifera, Cladorhizidae): a new deep-sea carnivorous sponge from Patagonia." Zootaxa 4466, no. 1 (2018): 164. http://dx.doi.org/10.11646/zootaxa.4466.1.13.
Full textAbstract:
This study describes a new species of carnivorous sponge (Family Cladorhizidae) collected in Patagonia, SW Atlantic, off Argentinean waters and the North of the Falkland Islands (Malvinas). The species described here, belongs to the genus Abyssocladia and was collected by dredging and trawling during IEO (Spanish Institute of Oceanography) cruises in the South West Atlantic Ocean from 2007 to 2010 under the Atlantis Project. Abyssocladia vaceleti sp. nov. is characterised by the possession of a long peduncle and flat body with bilaterally symmetrical and apical filaments with a skeleton of tornotes (often polytylotes), styles, abyssochelae, arcuate chelae, sigmancistras and acanthotylostrongyles. This species lives at depths of 901–1547 m.
28
Pohle, Gerhard W. "First Canadian record of Paralomis bouvieri Hansen, 1908 (Decapoda: Anomura: Lithodidae), infected by the rhizocephalan Briarosaccus callosus (Cirripedia: Peltogastridae) and carrying a hyperparasitic cryptoniscinid isopod (Epicaridea)." Canadian Journal of Zoology 70, no. 8 (1992): 1625–29. http://dx.doi.org/10.1139/z92-224.
Full textAbstract:
The stone crab Paralomis bouvieri is reported for the first time from Canadian Atlantic waters. Combined records now indicate a continuous boreal circum-Atlantic distribution. This is also the first documentation of the rhizocephalan parasite Briarosaccus callosus infecting P. bouvieri. Growth rings on the cuticular shield of B. callosus showed an age of about 4 years. A secondary hyperparasitic infection by a cryptoniscinid isopod was also noted. The crabs were found in much shallower waters than previously recorded. Host, parasite, and hyperparasite specimens have been deposited at the Atlantic Reference Centre, Huntsman Marine Science Centre, St. Andrews, New Brunswick, Canada.
29
Wenzel, F. W., B. Jann, J. Allen, et al. "Migration of a humpback whale (Megaptera novaeangliae) between the Cape Verde Islands and Iceland." J. Cetacean Res. Manage. 5, no. 2 (2023): 125–29. http://dx.doi.org/10.47536/jcrm.v5i2.812.
Full textAbstract:
The movements of individual humpback whales (Megaptera novaeangliae) can be tracked by matching photographs of the distinctive markings on the ventral sides of their tail flukes. During the winter-spring seasons of 1990, 1991, 1995, 1996, 1999, 2000, 2001 and 2002 a total of 42 individual humpbacks were identified by fluke photographs from the waters of the Cape Verde Islands. These were compared with photographs taken elsewhere in the North Atlantic. One match was made with a whale previously photographed in the Denmark Strait off Iceland, providing the first direct evidence of a link between the humpbacks in tropical waters of the eastern North Atlantic and a high-latitude feeding ground. This finding is consistent with the mitochondrial DNA evidence of at least two distinct breeding populations of humpback whales in the North Atlantic. The presence of cows with young calves as well as singers during the humpback mating and calving season implies that waters surrounding the Cape Verde archipelago constitute a breeding and calving ground for an eastern North Atlantic population of humpback whales.
30
Bañón, R., J. L. del Rio, C. Piñeiro, and M. Casas. "Occurrence of tropical affinity fish in Galician waters, north-west Spain." Journal of the Marine Biological Association of the United Kingdom 82, no. 5 (2002): 877–80. http://dx.doi.org/10.1017/s0025315402006288.
Full textAbstract:
Four new fish species have been recorded for the first time in the last few years in Galician waters: Physiculus dalwigkii, Neoscopelus microchir, Gaidropsarus granti and Pisodonophis semicinctus. The captures of Physiculus dalwigki, N. microchir and G. granti represent a new northern limit for their distribution in the north-east Atlantic, increasing their geographical range of distribution considerably while the capture of Pisodonophis semicinctus is the second record for the Atlantic European waters.
31
CARVALHO-FILHO, ALFREDO, GUY MARCOVALDI, CLÁUDIO L. S. SAMPAIO, M. ISABEL G. PAIVA, and LUIZ A. G. DUARTE. "First report of Aulopus (Teleostei: Aulopidae) from Southwestern Atlantic, with a review of records and a key to Western Atlantic Aulopoidei species." Zootaxa 2628, no. 1 (2010): 27. http://dx.doi.org/10.11646/zootaxa.2628.1.2.
Full textAbstract:
In this second paper dedicated to report on deep-sea fishes from Brazilian waters, mainly from Bahia, the presence of one family and three species of Aulopoidei is reported for the first time from Brazilian waters: the aulopid Aulopus filamentosus (royal flagfin), the synodontids Saurida normani and Synodus poeyi (shortjaw lizardfish and offshore lizardfish, respectively). The presence of Synodus saurus and Saurida suspicio in Brazilian waters is discussed, and a key to the Western Atlantic Aulopoidei is provided.
32
Castonguay, Martin, George A. Rose, and William C. Leggett. "Onshore Movements of Atlantic Mackerel (Scomber scombrus) in the Northern Gulf of St. Lawrence: Associations with Wind-Forced Advections of Warmed Surface Waters." Canadian Journal of Fisheries and Aquatic Sciences 49, no. 11 (1992): 2232–41. http://dx.doi.org/10.1139/f92-244.
Full textAbstract:
We employed fisheries acoustic techniques to assess the distribution and relative abundance of Atlantic mackerel (Scomber scombrus) at high resolution at Brador Bay in the northern Gulf of St. Lawrence in 1985 and 1986. These data were used to test the hypotheses that (1) onshore movements of mackerel are associated with wind-forced advections of heated surface waters and (2) mackerel are confined to waters having temperatures [Formula: see text]. Increased mackerel densities or "mackerel events" followed landward advections of heated surface waters in both 1985 and 1986. Landward advections of surface waters, and mackerel events, followed alongshore wind stress from the northeast. In our daytime observations, mackerel tended to concentrate in waters having temperatures of approximately 4 °C, near bottom, beneath warmer surface waters. However, the overall probability of mackerel occurrence inshore was much greater when near-bottom waters were warmer [Formula: see text]. Mackerel densities were not correlated with salinities, cross-shore winds, or currents but were negatively correlated with Atlantic cod (Gadus morhua) densities within the study site.
33
Jacobs, Gregg A., Robert W. Helber, John M. Toole, E. Joseph Metzger, and Tommy G. Jensen. "North Atlantic upper ocean sound channel variations." Journal of the Acoustical Society of America 157, no. 6 (2025): 4573–87. https://doi.org/10.1121/10.0036944.
Full textAbstract:
Historical profile observations characterize sound channel distributions across the North Atlantic Ocean and their relationships to water masses as well as support assessment of numerical ocean model performance. The focus of this study is sound channels above 500 m depth, below the sonic layer, and having a cutoff frequency of less than 200 Hz. Sound channels occur frequently around the Rockall Trough, the Reykjanes Ridge, the Labrador Current off the Grand Banks, and the Gulf Stream. Seasonal effects result in higher occurrences in spring and summer when the sonic layer is shallower. Water mass properties at sound channel axes exhibit lower salinity than at channel tops and bottoms on average, which implies cold, low salinity surface waters have been subducted into the water column. As ocean numerical model resolution is increased vertically and horizontally, model results are more consistent with observed sound channel occurrence rates as well as water mass properties. In addition to low salinity waters laterally interleaving with warmer, more saline waters of equal density, several ocean processes can move relatively cold low salinity surface waters to the subsurface including subduction from surface fronts along isopycnals and winter convection. Model deficiencies are considered relative to water mass distributions and possible physical processes.
34
Deloughrey, Elizabeth. "Heavy Waters: Waste and Atlantic Modernity." PMLA/Publications of the Modern Language Association of America 125, no. 3 (2010): 703–12. http://dx.doi.org/10.1632/pmla.2010.125.3.703.
Full textAbstract:
We cannot think of a time that is oceanlessOr of an ocean not littered with wastage—T. S. Eliot, “The Dry Salvages”A Poem that Renders the Sea as Pedagogical History, Lorna Goodison's “Arctic, Antarctic, Atlantic, Pacific, Indian Ocean” depicts Caribbean schoolchildren learning “the world's waters rolled into a chant.” After shivering through the “cold” Arctic and Antarctic, the class “suffered [a] sea change” in the destabilizing Atlantic, abandoning the terrestrial stability of their benches to enter an ocean in which only their voices orient them in time and space as they “call out across / the currents of hot air.” In fathoming what Derek Walcott has called “the sea [as] history,” their “small bodies” are “borrowed / by the long drowned” (Goodison). While colonial narratives of maritime expansion have long depicted the ocean as blank space to be traversed, these students enter Atlantic stasis, a place occupied by the wasted lives of Middle Passage modernity. This Atlantic is not aqua nullius, circumscribed and mapped by the student oceanographer, but rather a place where the haunting of the past overtakes the present subject. Édouard Glissant has described the Atlantic as a “beginning” for modernity, a space “whose time is marked by … balls and chains gone green” (Poetics 6): a sign of submarine history and its material decay. Thus, Atlantic modernity becomes legible through the sign of heavy water, an oceanic stasis that signals the dissolution of wasted lives. After the poem's irruptive consonance of the “bodies borrowed,” the vowels lengthen to mimic a “long drowned” history of the Atlantic, and the narrative is transformed. Reminding us that the Middle Passage “abyss is a tautology” that haunts ocean modernity (Glissant, Poetics 6), the poem traps the students (and readers) in the violent corporeal history of the Atlantic. Instead of moving on to the next ocean of the lesson, the class repeats the word “Atlantic, as if wooden pegs / were forced between our lips; Atlantic, as teacher's / strap whipped the rows on.” Only in the last two lines of the poem do we catch a glimpse of other oceans, trapped as we are in “learn[ing] this lesson: / Arctic, Antarctic, Atlantic, Pacific and then Indian.”
35
Ferrari, Raffaele, Louis-Philippe Nadeau, David P. Marshall, Lesley C. Allison, and Helen L. Johnson. "A Model of the Ocean Overturning Circulation with Two Closed Basins and a Reentrant Channel." Journal of Physical Oceanography 47, no. 12 (2017): 2887–906. http://dx.doi.org/10.1175/jpo-d-16-0223.1.
Full textAbstract:
AbstractZonally averaged models of the ocean overturning circulation miss important zonal exchanges of waters between the Atlantic and Indo-Pacific Oceans. A two-layer, two-basin model that accounts for these exchanges is introduced and suggests that in the present-day climate the overturning circulation is best described as the combination of three circulations: an adiabatic overturning circulation in the Atlantic Ocean associated with transformation of intermediate to deep waters in the north, a diabatic overturning circulation in the Indo-Pacific Ocean associated with transformation of abyssal to deep waters by mixing, and an interbasin circulation that exchanges waters geostrophically between the two oceans through the Southern Ocean. These results are supported both by theoretical analysis of the two-layer, two-basin model and by numerical simulations of a three-dimensional ocean model.
36
Coolidge, M. "Great Waters: An Atlantic Passage." Interdisciplinary Studies in Literature and Environment 11, no. 1 (2004): 242–43. http://dx.doi.org/10.1093/isle/11.1.242.
Full text
37
Garrison, Lance P., Anthony Martinez, and Katherine Maze-Foley. "Habitat and abundance of cetaceans in Atlantic Ocean continental slope waters off the eastern USA." J. Cetacean Res. Manage. 11, no. 3 (2023): 267–77. http://dx.doi.org/10.47536/jcrm.v11i3.606.
Full textAbstract:
This study quantifies the abundance and spatial distribution of the cetacean community occupying continental shelf edge and inner continental slope waters along the US southeast Atlantic coast. A shipboard visual line-transect survey was conducted between June and August of 2004 that included effort in waters >50m deep encompassing the shelf break and inner continental slope off the US east coast between 28°N and 38°N latitude. The abundance of nine cetacean taxa was estimated using line-transect distance analysis and an independent observer approach to correct for visibility bias. Canonical correspondence analysis was used to examine the spatial distribution of the cetaceans encountered during the survey as a function of surface temperature, surface salinity, surface fluorescence, bottom depth, and bottom slope. The abundance estimates for most species were much higher than those from a study of the area conducted in 1998. This is primarily due to increased coverage of the shelf-break region and correction for visibility bias. The multivariate analysis indicated four distinct groups of cetaceans that partitioned habitat as a function of salinity, depth, and a latitudinal gradient. These groups were associated with specific water masses and hydrographic features including mid-Atlantic shelf waters (Group I), the shelf break (Group II), mid-Atlantic slope waters (Group III), and south Atlantic slope water (Group IV). Areas where water masses converge such as the continental shelf break along the mid-Atlantic and near Cape Hatteras, North Carolina are therefore areas of both high diversity and density of cetaceans.
38
Vermassen, Flor, Nanna Andreasen, David J. Wangner, et al. "A reconstruction of warm-water inflow to Upernavik Isstrøm since 1925 CE and its relation to glacier retreat." Climate of the Past 15, no. 3 (2019): 1171–86. http://dx.doi.org/10.5194/cp-15-1171-2019.
Full textAbstract:
Abstract. The mass loss from the Greenland Ice Sheet has increased over the past 2 decades. Marine-terminating glaciers contribute significantly to this mass loss due to increased melting and ice discharge. Periods of rapid retreat of these tidewater glaciers have been linked to the concurrent inflow of warm Atlantic-sourced waters. However, little is known about the variability of these Atlantic-derived waters within the fjords, due to a lack of multi-annual in situ measurements. Thus, to better understand the potential role of ocean warming on glacier retreat, reconstructions that characterize the variability of Atlantic water inflow to the fjords are required. Here, we investigate foraminiferal assemblages in a sediment core from Upernavik Fjord, West Greenland, in which the major ice stream Upernavik Isstrøm terminates. We conclude that the foraminiferal assemblage is predominantly controlled by changes in bottom water composition and provide a reconstruction of Atlantic water inflow to Upernavik Fjord, spanning the period 1925–2012. This reconstruction reveals peak Atlantic water influx during the 1930s and again after 2000, a pattern that is comparable to the Atlantic Multidecadal Oscillation (AMO). The comparison of these results to historical observations of front positions of Upernavik Isstrøm reveals that inflow of warm Atlantic-derived waters likely contributed to high retreat rates in the 1930s and after 2000. However, moderate retreat rates of Upernavik Isstrøm also prevailed in the 1960s and 1970s, showing that glacier retreat continued despite a reduced Atlantic water inflow, albeit at a lower rate. Considering the link between bottom water variability and the AMO in Upernavik Fjord, and the fact that a persistent negative phase of the AMO is expected for the next decade, Atlantic water inflow into the fjord may decrease in the coming decade, potentially minimizing or stabilizing the retreat of Upernavik Isstrøm during this time interval.
39
Bryden, H. L., B. A. King, G. D. McCarthy, and E. L. McDonagh. "Impact of a 30% reduction in Atlantic meridional overturning during 2009–2010." Ocean Science 10, no. 4 (2014): 683–91. http://dx.doi.org/10.5194/os-10-683-2014.
Full textAbstract:
Abstract. The Atlantic meridional overturning circulation comprises warm upper waters flowing northward, becoming colder and denser until they form deep water in the Labrador and Nordic Seas that then returns southward through the North and South Atlantic. The ocean heat transport associated with this circulation is 1.3 PW, accounting for 25% of the maximum combined atmosphere–ocean heat transport necessary to balance the Earth's radiation budget. We have been monitoring the circulation at 25° N since 2004. A 30% slowdown in the circulation for 14 months during 2009–2010 reduced northward ocean heat transport across 25° N by 0.4 PW and resulted in colder upper ocean waters north of 25° N and warmer waters south of 25° N. The spatial pattern of upper ocean temperature anomalies helped push the wintertime circulation 2010–2011 into record-low negative NAO (North Atlantic Oscillation) conditions with accompanying severe winter conditions over northwestern Europe. The warmer temperatures south of 25° N contributed to the high intensity hurricane season in summer 2010.
40
Nikitenko, A. I., D. V. Artemenkov, A. M. Orlov, A. N. Stroganov, and V. A. Belyaev. "Sexual maturation of the chub mackerel <I>Scomber colias</I> (Scombridae) in the East-Central Atlantic." Voprosy ihtiologii 64, no. 4 (2024): 471–79. https://doi.org/10.31857/s0042875224040108.
Full textAbstract:
Scientific monitoring of pelagic fish stocks in 2004–2005 and 2014–2017 provided information on characteristics of sexual maturation of Atlantic chub mackerel Scomber colias in the coastal waters of the Central-Eastern Atlantic. Based on these results we describe ecological and geographical variability of some biological characteristics of the species. Features of sexual maturation of females and males of the mackerel can be described by a logistic equation obtained in the R programming environment. Fork length, at which 50% of individuals aged 1+ are mature, is 18.4 cm for females and 20.0 cm for males; 100% of individuals are mature at age 3+ with a fork length of 32.3 and 30.8 cm for females and males, respectively. A high proportion of spawning chub mackerel individuals in the Central-Eastern Atlantic have been recorded from February to March and from June to July. Chub mackerel in the coastal waters of this region are similar in life cycle characteristics to the populations of the waters off the Canary Islands and the Madeira Archipelago, but differ from the populations of the waters off mainland Portugal, the Azores, South Africa, and the Bay of Biscay in faster sexual maturation and growth rates.
41
Shadwick, E. H., T. Papakyriakou, A. E. F. Prowe, D. Leong, S. A. Moore, and H. Thomas. "Carbon cycling in the Arctic Archipelago: the export of Pacific carbon to the North Atlantic." Biogeosciences Discussions 6, no. 1 (2009): 971–94. http://dx.doi.org/10.5194/bgd-6-971-2009.
Full textAbstract:
Abstract. The Arctic Ocean is expected to be disproportionately sensitive to climatic changes, and is thought to be an area where such changes might be detected. The Arctic hydrological cycle is influenced by: runoff and precipitation, sea ice formation/melting, and the inflow of saline waters from Bering and Fram Straits and the Barents Sea Shelf. Pacific water is recognizable as intermediate salinity water, with high concentrations of dissolved inorganic carbon (DIC), flowing from the Arctic Ocean to the North Atlantic via the Canadian Arctic Archipelago. We present DIC data from an east-west section through the Archipelago, as part of the Canadian International Polar Year initiatives. The fractions of Pacific and Arctic Ocean waters leaving the Archipelago and entering Baffin Bay, and subsequently the North Atlantic, are computed. The eastward transport of carbon from the Pacific, via the Arctic, to the North Atlantic is estimated. Altered mixing ratios of Pacific and freshwater in the Arctic Ocean have been recorded in recent decades. Any climatically driven alterations in the composition of waters leaving the Arctic Archipelago may have implications for anthropogenic CO2 uptake, and hence ocean acidification, in the subpolar and temperate North Atlantic.
42
Winters, G. H., and E. L. Dalley. "Meristic Composition of Sand Lance (Ammodytes spp.) in Newfoundland Waters with a Review of Species Designations in the Northwest Atlantic." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 3 (1988): 516–29. http://dx.doi.org/10.1139/f88-061.
Full textAbstract:
Examination of new meristic data on sand lance (Ammodytes spp.) populations in Newfoundland coastal waters using a combination of discriminant function and modal analyses demonstrates for the first time that co-occurrence is a common feature of the distribution of the two species (A. dubius and A. americanus) provisionally considered to exist in the Northwest Atlantic. In addition, the consistency in the meristic counts of A. dubius between the offshore and inshore samples and the postulated spawning of A. dubius in Newfoundland coastal waters provides good evidence that A. dubius is reproductively isolated from A. americanus. Reanalysis of published data on the vertebral composition of sand lance in the Northwest Atlantic confirms the co-occurrence of A. americanus and A. dubius in inshore areas from West Greenland southwards to the Gulf of Maine. These new analyses taken together with a review of the major distinguishing characteristics of sand lance species in the North Atlantic waters lead us to conclude that the heterogeneous assemblage of sand lance found inshore from West Greenland southwards and offshore from Georges Bank southwards and which has traditionally been classified as A. americanus belongs to a single trans-Atlantic species, A. marinus.
43
de, Carvalho-Souza Gustavo, Cristóbal Gómez, and Enrique González-Ortegón. "A non-native fish species reaches the south-western European waters: the Atlantic croaker, Micropogonias undulatus (Acanthuriformes, Sciaenidae) and its invasion history in Europe." Biodiversity Data Journal 12 (May 14, 2024): e120736. https://doi.org/10.3897/BDJ.12.e120736.
Full textAbstract:
The Atlantic croaker <i>Micropogonias undulatus</i>, a sciaenid fish native to the North Atlantic American coast, holds importance in recreational and commercial fisheries. Moreover, its potential as an invasive species should be noted, given its expansion and establishment in Atlantic European waters. This study reports its southernmost occurrence in Europe, in the Gulf of Cadiz. Morphological and molecular analysis confirmed its identity, revealing genetic similarities to US sequences. A comprehensive review of historical non-native distribution records underscored the species' expansion throughout European waters, suggesting human-mediated introduction. The escalating frequency of such arrivals emphasises the critical need for effective monitoring and management efforts in order to control non-native species in this region.
44
Deremble, Bruno, and W. K. Dewar. "Volume and Potential Vorticity Budgets of Eighteen Degree Water." Journal of Physical Oceanography 43, no. 11 (2013): 2309–21. http://dx.doi.org/10.1175/jpo-d-13-052.1.
Full textAbstract:
Abstract Mode waters are a distinctive baroclinic feature of the World Ocean characterized by relatively weak vertical stratification. They correspond dynamically to low potential vorticity (PV). In the North Atlantic subtropical gyre, the mode waters have become known as Eighteen Degree Water. Their dynamics involves air–sea interaction, diapycnal and isopycnal mixing, and subduction. Understanding mode water dynamics is therefore both challenging and important since it connects several aspects of the ocean circulation. Mass and PV budget of the mode water's core, evaluated in a realistic primitive equation North Atlantic model, are used to characterize mode water maintenance. It is shown that the surface PV flux has very little impact on mode water; the surface buoyancy flux in combination with eddy mass flux is the most important control on mode water structure. A mean PV formalism is used to show that the PV and water-mass formation budgets are intrinsically linked. A decomposition of the budget demonstrates the role of the mean PV field in permitting the eddy mass flux to discharge the net formation to the surrounding fluid.
45
Gudmundsson, Gudmundur. "Taxonomy and distribution of living species of the genus Lenticulina in Icelandic waters." Micropaleontology 71, no. 1 (2025): 1–30. https://doi.org/10.47894/mpal.71.1.01.
Full textAbstract:
Taxonomy of seven large and little-known large species of Lenticulina Lamarck, 1804 in Icelandic waters (753,000 km2) is revised and their spatial distribution is documented in relation to temperature, depth, and salinity. Knowledge of Lenticulina in Recent sediments of the North Atlantic, relies mainly on studies in the late 19th and early 20th centuries, that used large volume samplers. Since then, species of Lenticulina in the studied area, have nearly completely evaded all subsequent studies, as these have focused on quantitative studies using small volume samplers. This study analysed 879 dredge samples where seven Lenticulina species occurred in 238 samples, comprising 1,239 specimens. Species descriptions are revised and illustrated with high resolution photographs of micro- and megalospheric generations. The species are absent from the Arctic (-1°C) deep-water basins north of the GSR (Greenland-Scotland Ridge) but are frequent in the temperate shallow and deep-water masses of the North Atlantic south of the GSR. The distributional ranges of the species are grouped into four ecological types: (1) Lenticulina novangliae and Lenticulina torrida span a wide range of depth, temperature, and salinity. (2) Lenticulina glabrata and Lenticulina gibba are most frequent in shallow and temperate waters north off Iceland. (3) Lenticulina atlantica and Lenticulina dorbignii are present in the shallow waters south and west off Iceland. (4) Lenticulina occidentalis is restricted to deep waters south of the GSR. It is found unlikely that more species of Lenticulina will be discovered in the area using the present methodology.
46
Manilo, Leonid. "The diversity of fish of Atlantic–Mediterranean origin in marine waters of the Azov–Black Sea basin within the borders of Ukraine." Geo&Bio 2024, no. 26 (2024): 121–34. https://doi.org/10.53452/gb2610.
Full textAbstract:
The article is a continuation of a series of our previous works on alien fish species of Atlantic–Mediterranean origin over the past 50 years in the Azov–Black Sea basin within the waters of Ukraine. The most numerous in terms of the number of species of this group is the goby family. Next in numbers are the families of combtooth blennies, porgies, pipefishes, wrasses, mullets, and herrings. Other families in the waters of Ukraine are represented by 1 to 3 species of fish. There is a clear trend of reduction in the number of taxa from the waters of the Crimea to the north-western part of the Black Sea (NWBS) and the Sea of Azov. The maximum species richness of fish of Atlantic–Mediterranean origin is observed in the Crimean waters (113 species), and the taxonomic richness of the group in this area is 262 taxa. In the waters of the NWBS, species richness is 80, while taxonomic richness decreases by 25.0% to 203 taxa. In the Sea of Azov, there is a sharp decrease in species richness to 37; taxonomic richness is reduced by two times (107 taxa). The most similar to the ichthyofauna of the Black Sea of Atlantic–Mediterranean origin was the ichthyofauna of the Crimean waters (0.71). Faunas of the Crimea and NWBS are followed (0.68). The smallest coefficients of similarity have the ichthyofauna of the Azov and Black seas (0.23) and between the Azov and Crimean waters (0.33). Since the 1970s, 30 alien fish species of Atlantic–Mediterranean origin, belonging to 26 genera, 15 families, and 8 orders, have been discovered in the marine waters of Ukraine. Among them, species whose appearance is associated with the natural process of mediterranisation predominate (25 species, 83.3%). Species that entered with the help of anthropogenic factors accounted for 6.7%, while the share of species with unspecified vectors of introduction was 10.0%. In the waters of the Crimea and in the NWBS, there is a significant prevalence of species, the appearance of which is the result of mediterranisation. The aliens of the Sea of Azov belong to the accidental species, which were previously common in the Black Sea and expanded their range when salty Black Sea waters entered through the Kerch Strait as a result of the reduction of the flow of the Don and Kuban rivers, caused mainly by anthropogenic factors. In recent years, significant changes have taken place in the marine waters of Ukraine. The most significant changes occurred in the Crimea, where this percentage is 30.1 %; 24.3 % in the Sea of Azov, and 15.0 % in the waters of the NWBS.
47
Lojo, Davinia, Marta Cousido-Rocha, Santiago Cerviño, Rosario Dominguez-Petit, María Sainza, and Maria Grazia Pennino. "Assessing changes in size at maturity for the European hake (Merluccius merluccius) in Atlantic Iberian waters." Scientia Marina 86, no. 4 (2022): e046. http://dx.doi.org/10.3989/scimar.05287.046.
Full textAbstract:
European hake (Merluccius merluccius) is a commercially important resource in Iberian Atlantic waters. Despite the recovery plan implemented in 2006 and the multiannual management plan for western waters, fishing mortality is still higher than that corresponding to the maximum sustainable yield for the southern European hake stock. The biological processes underlying the dynamics of this stock and its life history traits are essential for assessing population productivity and resilience, making them basic information for management. We analysed the temporal variability of size at maturity (L50) of this species and the main factors influencing it in Atlantic Iberian waters from 1982 to 2019. The annual variability of L50 for each sex was modelled with generalized additive models, considering explanatory environmental variables (Atlantic Multidecadal Oscillation, North Atlantic Oscillation and sea surface temperature) and biological variables (biomass, spawning biomass at length and relative condition factor). The results showed that the L50 of males decreased by a total of 12.9 cm and L50 of females decreased by a total of 10.9 cm from 1982 to 2019. For females the significant explanatory variables were year, spawning biomass at length, biomass and the North Atlantic Oscillation, while for males only year was an explanatory variable. These results are important for understanding the status of the European hake population, signalling that L50 is a good indicator for predicting future population dynamics.
48
MADEIRA, PATRÍCIA, ANDREAS KROH, RICARDO CORDEIRO, ANTÓNIO M. DE FRIAS MARTINS, and SÉRGIO P. ÁVILA. "The Echinoderm Fauna of the Azores (NE Atlantic Ocean)." Zootaxa 4639, no. 1 (2019): 1–231. http://dx.doi.org/10.11646/zootaxa.4639.1.1.
Full textAbstract:
In more than 150 years of research in the waters surrounding the Azores, several publications on the fauna of echinoderms of the archipelago have been produced, in the form of papers, notes, reports, reviews, and monographs. This work attempts to summarize the present knowledge on this marine group in the Azorean exclusive economic zone (i.e., waters within 200 nautical miles of the archipelago’s shores). A short review of the history of the species’ taxonomy is given, with key references, geographical distribution, ecology, additional notes and, when possible, figures. We herein report 172 species of echinoderms (6 crinoids, 55 ophiuroids, 45 asteroids, 36 holothurians, and 30 echinoids) from the Azores Archipelago, most of them inhabiting deep waters (>200 m). Only 29 shallow-water species were recorded locally (≤50 m depth). In general, the echinoderm species present in the Azores are characterized by a wide geographical distribution in the Atlantic Ocean. Only nine taxa (all deep-water species, >840 m) appear to be restricted to the Azorean waters. Overall, the knowledge of the echinoderm fauna of the Azores is out-dated, with many species last collected in the archipelago over 100 years ago. A recent interest in the Azorean Mid-Atlantic waters has brought oceanographic cruises back to the archipelago, thus providing new opportunities for the renewal of 150 years of echinoderm studies in the area.
49
Reverter-Gil, Oscar, and Javier Souto. "Two new species of cheilostomate Bryozoa from Iberian waters." European Journal of Taxonomy 760 (July 15, 2021): 16–31. http://dx.doi.org/10.5852/ejt.2021.760.1437.
Full textAbstract:
Two new species of cheilostomate bryozoans are described from material preserved in museums: Cradoscrupocellaria severoi sp. nov., from Iberian Mediterranean waters, and Setosella margaritae sp. nov., from shallow waters along the Atlantic coast of Europe. Moreover, the Mediterranean species Setosella cyclopensis Rosso, Di Martino & Gerovasileiou, 2020 is reported in Iberian waters for the first time.
50
Dubinina, E. O., S. A. Kossova, A. A. Osadchiev, Yu N. Chizhova та A. S. Avdeenko. "Pacific waters in the East Siberian Sea: identification by δ13С(DIC) and [DIC]". Doklady Rossijskoj akademii nauk. Nauki o Zemle 515, № 2 (2024): 221–28. http://dx.doi.org/10.31857/s2686739724040063.
Full textAbstract:
The estimates of the scale and distribution of Bering Sea waters in the Pacific sector of the Arctic Ocean were made using the high-precision data on the isotopic composition and concentration of dissolved inorganic carbon. Despite the fact that δ13С(DIC) and [DIC] are not classic conservative tracers, in the East Siberian Sea, which is a zone of active interaction of river runoff with sea waters, these parameters can indicate the presence of sea waters not only of Atlantic, but also of Pacific origin, similar to the waters of the Bering Sea. Using a three-component mixing model, the spatial distribution of Pacific, Atlantic and river waters along two sections of the East Siberian Sea was estimated. The Pacific component extends from east to west to approximately 160 degrees east longitude, and possibly further west, skirting Wrangel Island not only from the north, but also possibly from the south. In the East Siberian Sea, waters similar to the open sea Bering summer surface waters are found, which are carried to the northern shelf by the circular Bering Sea Current, and upper intermediate waters, which can enter the zone of the northern shelf of the sea due to upwelling or active mixing.