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Journal articles on the topic 'Pacific slope basins'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

ALBERT, JAMES S., and WILLIAM G. R. CRAMPTON. "Seven new species of the Neotropical electric fish Gymnotus (Teleostei, Gymnotiformes) with a redescription of G. carapo (Linnaeus)." Zootaxa 287, no. 1 (2003): 1. http://dx.doi.org/10.11646/zootaxa.287.1.1.

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Seven new species of Gymnotus are described, and a redescription of the type species G. carapo sensu-stricto Linnaeus (G. carapo s.s.) is provided, from examination of populations from throughout tropical South and Middle America. The new species are described on the basis of unique combinations of characters. Five of the new species are members of the G. carapo species-group: 1, Gymnotus choco n. sp., from the Baudó and Atrato basins on the Pacific and Caribbean slopes of Colombia; 2, Gymnotus esmeraldas n. sp., from the Esmeraldas and Guayaquil basins on the Pacific Slope of Ecuador; 3, Gymn

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Underwood, S. Jeffrey, Michael L. Kaplan, and K. C. King. "The Role of Upstream Midtropospheric Circulations in the Sierra Nevada Enabling Leeside (Spillover) Precipitation. Part I: A Synoptic-Scale Analysis of Spillover Precipitation and Flooding in a Leeside Basin." Journal of Hydrometeorology 10, no. 6 (2009): 1309–26. http://dx.doi.org/10.1175/2009jhm1105.1.

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Abstract Pacific-originating storms that produce heavy leeside liquid precipitation in the Sierra Nevada are rare compared to those that generate windward slope rainfall. However, these leeside precipitation events have a profound effect on the flood hydrology of leeside basins in the Sierra Nevada. This study identified 12 storms that affected the Truckee River basin in northeastern Nevada. The storms produced both moderate and extreme flooding in this leeside basin. A synoptic-scale analysis of conditions leading to leeside storms was produced using a compositing procedure. Composites for mu

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Montgomery, David R., Eric M. Beamer, George R. Pess, and Thomas P. Quinn. "Channel type and salmonid spawning distribution and abundance." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 3 (1999): 377–87. http://dx.doi.org/10.1139/f98-181.

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Consideration of fundamental channel processes, together with map-based and field investigations, indicates that stream channel type influences salmonid spawning distributions across entire channel networks and salmonid abundance within channel reaches. Our analysis suggests that salmonid spawning patterns in mountain drainage basins of the Pacific Northwest are adapted to, among other things, the timing and depth of channel bed mobility. We hypothesize that because the bed of pool-riffle and plane-bed reaches scours to a variable fraction of the thickness of alluvium, survival to emergence is

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Dominici-Arosemena, Arturo, Arturo Angulo, Haydee Osorio-Ugarte, et al. "Range extension of Isthmoheros tuyrensis, a threatened species of fish (Cichlidae) in Panama: including new ecological and morphological data." Journal of Threatened Taxa 15, no. 2 (2023): 22611–22. http://dx.doi.org/10.11609/jott.7950.15.2.22611-22622.

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There are two endemic species of Cichlidae in southern Central America, both found in the Pacific Slope of Eastern Panama (PSEP). One is Isthmoheros tuyrensis, which until now was presumed to be distributed in the Darien Province and the Bayano River basin. Information on distribution and ecology of I. tuyrensis is relatively scarce. In this investigation we report a new range extension for the species and provide additional morphological and ecological data. Fish were sampled using electrofishing and cast nets, in three river basins of the Panama District (Matasnillo, Juan Díaz, and Pacora) f

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Lemenkova, Polina. "GRASS GIS Modules for Topographic and Geophysical Analysis of the ETOPO1 DEM and Raster Data: North Fiji Basin, Pacific Ocean." Geographia Napocensis 14, no. 1 (2020): 27–38. https://doi.org/10.5281/zenodo.4307966.

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<em>The paper presents topographic analysis based on the raster data (NetCDF and grid formats) and visualization of the geophysical datasets that resembles the topographic surface. Geographically, the research focuses on the region of North Fiji Basin, South Pacific Ocean. North Fiji Basin is one of the marginal basins located at the converging boundary between the Pacific and Australian tectonic plates and is notable for complex geological settings. Methodology is based on GRASS GIS and includes scripting and cartographic visualization. Data include ETOPO1, GEBCO, EGM96 gravity and geoid rast

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Valenzuela, Silvia, Ricardo Britzke, Lenin D. Chumbe-Nolasco, et al. "Fish fauna of the trans-Andean Tumbes river basin in northern Peru." Check List 19, no. (1) (2023): 91–114. https://doi.org/10.15560/19.1.91.

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To update the knowledge of the ichthyofauna of the Tumbes River basin, we provide a list of species. We report 47 species of fishes, grouped into 23 families and 11 orders. Characiformes was the most diverse order with 12 species (25.5% of the total richness), followed by Carangiformes with eight species (17%). In our study, two species are newly reported from this river basin: <em>Pseudophallus starksii </em>(Jordan & Culver, 1895) and <em>Evorthodus minutus </em>Meek & Hildebrand 1928. According to salinity tolerance, the ichthyofauna is composed of 20 primary, 14 secondary, and 13 p

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Arabameri, Alireza, John P. Tiefenbacher, Thomas Blaschke, Biswajeet Pradhan, and Dieu Tien Bui. "Morphometric Analysis for Soil Erosion Susceptibility Mapping Using Novel GIS-Based Ensemble Model." Remote Sensing 12, no. 5 (2020): 874. http://dx.doi.org/10.3390/rs12050874.

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The morphometric characteristics of the Kalvārī basin were analyzed to prioritize sub-basins based on their susceptibility to erosion by water using a remote sensing-based data and a GIS. The morphometric parameters (MPs)—linear, relief, and shape—of the drainage network were calculated using data from the Advanced Land-observing Satellite (ALOS) phased-array L-type synthetic-aperture radar (PALSAR) digital elevation model (DEM) with a spatial resolution of 12.5 m. Interferometric synthetic aperture radar (InSAR) was used to generate the DEM. These parameters revealed the network’s texture, mo

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Alfaro, Eric J. "Caracterización del “veranillo” en dos cuencas de la vertiente del Pacífico de Costa Rica, América Central." Revista de Biología Tropical 62, no. 4 (2015): 1. http://dx.doi.org/10.15517/rbt.v62i4.20010.

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<p>The Eastern Tropical Pacific region is characterized by climate features rarely observed in tropical regions, one of them is the Mid-Summer Drought (MSD), “veranillo” or “canícula” in Spanish. On the Pacific slope of Central America, the annual precipitation cycle is characterized by two rainfall maxima in June and September-October, an extended dry season from November to May, and a shorter reduced precipitation period during July–August (MSD), during July, the magnitude of the trade winds increases and this is associated also with the Caribbean Low Level Jet (CLLJ), but characteriza

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Шамов, В. В., И. В. Токарев, Т. А. Михайлик, and А. В. Козачек. "Summer-autumn variability of isotopes (2H and 18O) in water at small mountain catchments in South Sikhote-Alin (Pacific Russia)." Гидросфера. Опасные процессы и явления 4, no. 2 (2023): 202–15. http://dx.doi.org/10.34753/hs.2022.4.2.202.

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Изотопный состав природной воды отражает ее приуроченность к различным звеньям гидрологического цикла, изменяясь в процессе фазовых переходов (испарения, транспирации, конденсации, замерзания, оттаивания), а также при взаимодействии воды с водовмещающими средами (горными породами, почвами, воздушными массами, биотой). В статье впервые на основе детальных натурных исследований, выполненных в период с 2013 по 2016 год в экспериментальных малых горных речных бассейнах, анализируется внутригодовая и межгодовая динамика содержания изотопов 2Н и 18О в основных географических типах вод, циркулирующих

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CHERNOVA, NATALIA, RALF THIEL, and IRINA EIDUS. "Four new species of Careproctus (Cottoidei: Liparidae) from the deep-water vicinity of the southern Kuril Islands (Western North Pacific)." Zootaxa 4821, no. 1 (2020): 71–87. http://dx.doi.org/10.11646/zootaxa.4821.1.3.

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Four new species of Careproctus (Cottoidei: Liparidae) are described from the Bussol Strait (the deepest channel of the Kuril archipelago) and two neighboring abyssal basins of the Western North Pacific. Careproctus laperousei sp. nov. from the northern slope of the Kuril-Kamchatka Trench (depths of 4796–4803 m) has the following characters: vertebrae 57, pectoral-fin rays 26, principal caudal-fin rays 8 and pore pattern 2-6-7-1; it differs from the most similar congeners from the North Pacific in having a black peritoneum, short head (22.5 % of standard length, SL) and large disk (37.0 % of h

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Zheng, Xiaohui, Qiguang Wang, Lihua Zhou, Qing Sun, and Qi Li. "Predictive Contributions of Snowmelt and Rainfall to Streamflow Variations in the Western United States." Advances in Meteorology 2018 (July 4, 2018): 1–14. http://dx.doi.org/10.1155/2018/3765098.

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This study used long-term in situ rainfall, snow, and streamflow data to explore the predictive contributions of snowmelt and rainfall to streamflow in six watersheds over the Western United States. Analysis showed that peak snow accumulation, snow-free day, and snowmelt slope all had strong correlation with peak streamflow, particularly in inland basins. Further analysis revealed that the variation of snow accumulation anomaly had strong lead correlation with the variation of streamflow anomaly. Over the entire Western United States, inner mountain areas had lead times of 4–10 pentads. Howeve

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Martin, Yvonne, Kenneth Rood, James W. Schwab, and Michael Church. "Sediment transfer by shallow landsliding in the Queen Charlotte Islands, British Columbia." Canadian Journal of Earth Sciences 39, no. 2 (2002): 189–205. http://dx.doi.org/10.1139/e01-068.

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Despite the importance of landsliding in routing sediment through mountainous drainage basins, few studies have documented landsliding rates over extended time and space scales. We have investigated landsliding in surficial material in the Queen Charlotte Islands using a large inventory of events, derived from aerial photography, covering an area of 166.7 km2. The mean erosion rate for shallow landsliding is 0.10 mm·a1, which is at the upper end of shallow landsliding rates observed in the Pacific Northwest and coastal British Columbia, but several orders of magnitude lower than rock-based la

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13

Purkey, Sarah G., and Gregory C. Johnson. "Antarctic Bottom Water Warming and Freshening: Contributions to Sea Level Rise, Ocean Freshwater Budgets, and Global Heat Gain*." Journal of Climate 26, no. 16 (2013): 6105–22. http://dx.doi.org/10.1175/jcli-d-12-00834.1.

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Abstract Freshening and warming of Antarctic Bottom Water (AABW) between the 1980s and 2000s are quantified, assessing the relative contributions of water-mass changes and isotherm heave. The analysis uses highly accurate, full-depth, ship-based, conductivity–temperature–depth measurements taken along repeated oceanographic sections around the Southern Ocean. Fresher varieties of AABW are present within the South Pacific and south Indian Oceans in the 2000s compared to the 1990s, with the strongest freshening in the newest waters adjacent to the Antarctic continental slope and rise indicating

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Ballesteros-Nova, Nayarit E., Rodolfo Pérez-Rodríguez, Rosa G. Beltrán-López, and Omar Domínguez-Domínguez. "Genetic differentiation in the southern population of the Fathead Minnow Pimephales promelas Rafinesque (Actinopterygii: Cyprinidae)." PeerJ 7 (April 29, 2019): e6224. http://dx.doi.org/10.7717/peerj.6224.

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The North American cyprinid Pimephales promelas is a species with a wide distribution range, occurring in distinct hydrographic basins in Mexico, Canada, and the United States. Previous morphological and meristic analyses of P. promelas concluded that at least three subspecies exist in the midwestern and northeast region of the United States. No studies have been carried out on the Mexican population of P. promelas, but the findings of cryptic diversity in United States populations of this species, as well as in other codistributed fish species in Mexico could be an indication that Mexican pop

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Torne, Montserrat, Ivone Jiménez–Munt, Jaume Vergés, Manel Fernàndez, Alberto Carballo, and Margarete Jadamec. "Regional crustal and lithospheric thickness model for Alaska, the Chukchi shelf, and the inner and outer bering shelves." Geophysical Journal International 220, no. 1 (2019): 522–40. http://dx.doi.org/10.1093/gji/ggz424.

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SUMMARY This study presents for the first time an integrated image of the crust and lithospheric mantle of Alaska and its adjacent western shelves of the Chukchi and Bering seas based on joint modelling of potential field data constrained by thermal analysis and seismic data. We also perform 3-D forward modelling and inversion of Bouguer anomalies to analyse density heterogeneities at the crustal level. The obtained crustal model shows northwest-directed long wavelength thickening (32–36 km), with additional localized trends of thicker crust in the Brooks Range (40 km) and in the Alaska and St

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Olivero, Eduardo B., and Daniel R. Martinioni. "Late Albian inoceramid bivalves from the Andes of Tierra del Fuego: Age implications for the closure of the Cretaceous marginal basin." Journal of Paleontology 70, no. 2 (1996): 272–74. http://dx.doi.org/10.1017/s0022336000023349.

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At the southernmost tip of South America, a thick pile of deep marine volcaniclastic rocks called the Yahgan Formation (Kranck, 1932) was deposited during the Early Cretaceous in a small marginal basin developed between the continent and a Pacific-facing volcanic arc (Katz, 1972; Dalziel et al., 1974). North and northwest of Tierra del Fuego, in the adjacent Austral or Magallanes basin, this unit is laterally replaced by coeval, fine-grained deposits representing basinal, slope, and platform marine settings (Winslow, 1982; Biddle et al., 1986; Wilson, 1991). The geometry of the basins changed

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Shi, Yizuo, Guangzheng Jiang, Shangming Shi, et al. "Terrestrial heat flow and its geodynamic implications in the northern Songliao Basin, Northeast China." Geophysical Journal International 229, no. 2 (2021): 962–83. http://dx.doi.org/10.1093/gji/ggab500.

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SUMMARY Heat flow data are essential for understanding lithospheric dynamics. As a petroliferous basin, a large number of boreholes have been drilled during hydrocarbon exploration and production in the northern part of Songliao Basin, Northeast China. Meanwhile, the data on crustal structures, core samples and formation temperatures have been accumulated, which provide an opportunity for understanding the thermal state of the basin. Based on the temperature data from both Drilling Stem Test and continuous steady-state logging profiles, together with the systematic analysis of the thermal prop

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Slomp, C. P., and C. Heinze. "Glacial-interglacial variability in ocean oxygen and phosphorus in a global biogeochemical model." Biogeosciences 10, no. 2 (2013): 945–58. http://dx.doi.org/10.5194/bg-10-945-2013.

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Abstract. Increased transfer of particulate matter from continental shelves to the open ocean during glacials may have had a major impact on the biogeochemistry of the ocean. Here, we assess the response of the coupled oceanic cycles of oxygen, carbon, phosphorus, and iron to the input of particulate organic carbon and reactive phosphorus from shelves. We use a biogeochemical ocean model and specifically focus on the Last Glacial Maximum (LGM). When compared to an interglacial reference run, our glacial scenario with shelf input shows major increases in ocean productivity and phosphorus burial

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Magalhães, Célio, Ingo S. Wehrtmann, and Fernando L. Mantelatto. "Revalidation of Ptychophallus campylus Pretzmann, 1968, a freshwater crab species from Costa Rica (Brachyura: Decapoda: Pseudothelphusidae)." Revista de Biología Tropical 73, S2 (2025): e64534. https://doi.org/10.15517/rev.biol.trop..v73is2.64534.

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Introduction: Freshwater crab diversity in the Neotropics is high, comprising three families: Epiloboceridae, Pseudothelphusidae and Trichodactylidae. The genus Ptychophallus consists of 13 species, all from Panama and Costa Rica. Ptychophallus campylus has not been recognized as a valid species and has been treated as a presumptive junior synomym of Ptychophallus tristani. Objective: The present study aims to formalize the resurrection of P. campylus as a valid species. Methods: An additional specimen of P. campylus collected in the province of Limón, Costa Rica, was analyzed and compared to

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NASCIMENTO, PRISCILA S. DO, and CRISTIANA S. SEREJO. "New findings of the family Pardaliscidae from the deep-sea southwestern Atlantic: the genus Caleidoscopsis Karaman, 1974." Zootaxa 5256, no. 2 (2023): 139–57. http://dx.doi.org/10.11646/zootaxa.5256.2.3.

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Caleidoscopsis is a deep-sea pardaliscid genus known previously only from the SE Atlantic Ocean (Angola Basin), NE Pacific Ocean (Mexico, Cedros Trench) and Indian Ocean (Madagascar). This is the first record of Caleidoscopsis from off the Brazilian coast, SW Atlantic Ocean. Samples were collected with box core and/or van veen grabs between Espírito Santo, Campos and Santos Basin (19o–27o S), and around 417–1974 m depths. Two new species is herein described, Caleidoscopsis carlosi sp. nov., which differs from all Caleidoscopsis species by antenna 1 geniculate; maxilliped palp, article 4 shorte

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Monger, James W. H. "Canadian Cordilleran tectonics: from geosynclines to crustal collage." Canadian Journal of Earth Sciences 30, no. 2 (1993): 209–31. http://dx.doi.org/10.1139/e93-019.

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The major contributions by the Geological Survey of Canada in the Canadian Cordillera—systematic mapping and definition of the regional geological framework—led directly to tectonic syntheses that attempted to explain its origin. From the late 1800's until the 1960's, Cordilleran mountain building was viewed as the end result of geosynclinal deposition. Early workers felt that a connection existed between mountain building and the Pacific basin, but its nature was never clear because little was known about ocean basins and their relationships to continental margins. In the 1950's, the nature o

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Шамов, В. В., Е. А. Шекман, Т. С. Губарева, et al. "Properties of preferential water flow paths networks and background for their genesis in the slopes of small mountain valleys." Гидросфера. Опасные процессы и явления 3, no. 3 (2022): 275–96. http://dx.doi.org/10.34753/hs.2021.3.3.275.

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Дан анализ проведенных в горных речных долинах южного Сихотэ-Алиня и Верхнеколымского нагорья систематических исследований крупных предпочтительных водопроводящих путей – залегающих на глубине до 1 м от поверхности подземных дрен склонового масштаба, в которых концентрируется основная часть склоновых вод. Приведены оценки стока и скорости движения воды в этих дренах – соответственно 0,041–7,36 л/с и 0,1–7,2 см/с, которые по величине близки к таковым в руслах рек первого порядка в периоды межени. Выявлена их приуроченность к реликтовым или активным каменным потокам. Выдвинута гипотеза, что наиб

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Cant, Douglas J., and Glen S. Stockmal. "The Alberta foreland basin: relationship between stratigraphy and Cordilleran terrane-accretion events." Canadian Journal of Earth Sciences 26, no. 10 (1989): 1964–75. http://dx.doi.org/10.1139/e89-166.

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A foreland-basin sequence resulting from accretion of a terrane to a continental passive margin ideally should be unconformity bounded, with a shallowing-upward pattern, like the classic Flysch to Molasse sequence of Alpine foreland basins. The basal unconformity is cut as the peripheral bulge associated with lithospheric flexure migrates cratonward ahead of the basin and the advancing overthrusts. The shallowing occurs because sediment supply at first is low – early stages of accretion near the continental slope generate little or no topography above sea level; later stages result in signific

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Mudie, Petra J., and Valentina Yanko-Hombach. "Microforaminiferal linings as proxies for paleosalinity and pollution: Danube Delta example." Micropaleontology 65, no. 1 (2019): 27–45. http://dx.doi.org/10.47894/mpal.65.1.02.

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Acid-resistant, chitin-like organic linings of foraminiferal tests in palynological assemblages are commonly considered reliable indicators of marine transgressions despite sparse information on the relationship between the organic and inorganic skeletal components. This knowledge gap constrains reliable application in paleoecological studies. Foraminiferal lining recovery in palynological samples also varieswith the chemicals and temperature used for extraction of organic residues, and care is needed to avoid damage by hydrolysis or over-oxidation. Using samples treated onlywith cold acid, we

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Forke, Sven, Tim Rixen, Nicole Burdanowitz, et al. "Sources of laminated sediments in the northeastern Arabian Sea off Pakistan and implications for sediment transport mechanisms during the late Holocene." Holocene 29, no. 1 (2018): 130–44. http://dx.doi.org/10.1177/0959683618804627.

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Laminated sediments of the continental slope off the Makran coast in the northern Arabian Sea are well-known climate archives and record productivity, as well as supply of material from land. Here, we studied sediment core 275KL off Pakistan in concert with sediment trap, dust and river samples in order to characterize and quantify land-derived material deposited in varves and event layers. We analysed grain sizes, mineral assemblages, bulk components and stable isotopes (δ13C, δ18O) of carbonates. In winter, enhanced river discharge is the main source of lithogenic matter contributing the maj

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Parfeevets, A. V., and V. A. Sankov. "Geodynamic conditions for Cenozoic activation of tectonic structures in Southeastern Mongolia." Geodynamics & Tectonophysics 9, no. 3 (2018): 855–88. http://dx.doi.org/10.5800/gt-2018-9-3-0374.

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The knowledge of the neotectonic structures inSoutheastern Mongolia, that is considerably distant from the active plate boundaries, is important for determining a source of tectonic deformation and regular features of activation in the intracontinental setting. Our research was focused on the East Gobi and South Gobi depressions located inSoutheastern Mongolia, which developed since the Mesozoic and were activated to various degrees in the neotectonic stage. The study aimed to assess the paleostress state of the crust inSoutheastern Mongolia, identify the stages, factors and mechanisms of the

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Levin, L. A., W. Ekau, A. J. Gooday, et al. "Effects of natural and human-induced hypoxia on coastal benthos." Biogeosciences 6, no. 10 (2009): 2063–98. http://dx.doi.org/10.5194/bg-6-2063-2009.

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Abstract. Coastal hypoxia (defined here as <1.42 ml L−1; 62.5 μM; 2 mg L−1, approx. 30% oxygen saturation) develops seasonally in many estuaries, fjords, and along open coasts as a result of natural upwelling or from anthropogenic eutrophication induced by riverine nutrient inputs. Permanent hypoxia occurs naturally in some isolated seas and marine basins as well as in open slope oxygen minimum zones. Responses of benthos to hypoxia depend on the duration, predictability, and intensity of oxygen depletion and on whether H2S is formed. Under suboxic conditions, large mats of filamentous sulf

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Rolier Lara, Luis, Ingo S. Wehrtmann, Celio Magalhaes, and Fernando L. Mantelatto. "Species diversity and distribution of freshwater crabs (Decapoda: Pseudothelphusidae) inhabiting the basin of the Rio Grande de Terraba, Pacific slope of Costa Rica." Latin American Journal of Aquatic Research 41, no. 4 (2013): 685–95. http://dx.doi.org/10.3856/vol41-issue4-fulltext-5.

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Garcia, Emmanuel Soliman M., David T. Sandwell, and Dan Bassett. "Outer trench slope flexure and faulting at Pacific basin subduction zones." Geophysical Journal International 218, no. 1 (2019): 708–28. http://dx.doi.org/10.1093/gji/ggz155.

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SUMMARY Flexure and fracturing of the seafloor on the outer trench wall of subduction zones reflect bending of the lithosphere beyond its elastic limit. To investigate these inelastic processes, we have developed a full nonlinear inversion approach for estimating the bending moment, curvature and outer trench wall fracturing using shipboard bathymetry and satellite altimetry-derived gravity data as constraints. Bending moments and downward forces are imposed along curved trench axes and an iterative method is used to calculate the nonlinear response for 26 sites in the circum-Pacific region ha

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Siedler, Gerold, Jürgen Holfort, Walter Zenk, Thomas J. Müller, and Tiberiu Csernok. "Deep-Water Flow in the Mariana and Caroline Basins*." Journal of Physical Oceanography 34, no. 3 (2004): 566–81. http://dx.doi.org/10.1175/2511.1.

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Abstract Two major water masses dominate the deep layers in the Mariana and Caroline Basins: the Lower Circumpolar Water (LCPW), arriving from the Southern Ocean along the slopes north of the Marshall Islands, and the North Pacific Deep Water (NPDW) reaching the region from the northeastern Pacific Ocean. Hydrographic and moored observations and multibeam echosounding were performed in the East Mariana and the East Caroline Basins to detail watermass distributions and flow paths in the area. The LCPW enters the East Mariana Basin from the east. At about 13°N, however, in the southern part of t

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Tems, Caitlin E., and Eric Tappa. "Regional Fluctuations in the Eastern Tropical North Pacific Oxygen Minimum Zone during the Late Holocene." Oceans 5, no. 2 (2024): 352–67. http://dx.doi.org/10.3390/oceans5020021.

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This study presents a high-resolution record of δ15Nsed, which serves as a proxy for water column denitrification and oxygen minimum zone (OMZ) intensity, from the Soledad Basin in the Eastern Tropical North Pacific OMZ. The Soledad Basin δ15Nsed record is compared to the Pescadero Slope and Santa Barbara Basin (SBB) δ15Nsed records to gain insight into regional variations in the ETNP OMZ. During the Medieval Climate Anomaly (MCA; 950–1250 CE), Soledad Basin, Pescadero Slope, and SBB records exhibit coherent trends suggesting that there was general water column oxygenation stability. During th

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Wang, Ruohan, Jiayi Ouyang, Vasileios C. Fragkoulis, Yong Liu, and Michael Beer. "Experimental model updating of slope considering spatially varying soil properties and dynamic loading." Earthquake Engineering and Resilience 3, no. 1 (2024): 33–53. http://dx.doi.org/10.1002/eer2.70.

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AbstractThe widespread threat posed by slope structure failures to human lives and property safety is widely acknowledged. Additionally, natural soil often displays spatial variability due to geological deposition and other factors. Therefore, predicting the seismic response of slopes subjected to ground motions and inversely analyzing the spatial distribution of soils remains an unresolved issue. In the present work, a shaking table experimental test is first designed and carried out, in which a soft‐soil slope dynamic system is established. To capture the seismic response of the soft‐soil sl

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Kawai, Tadashi, and Makoto Ishimaru. "The Implementation of the Gradual Movement of Sliding Blocks to a New Method for Evaluating the Seismic Stability of Slopes Reinforced by Geotextile." Journal of Earthquake and Tsunami 12, no. 04 (2018): 1841010. http://dx.doi.org/10.1142/s1793431118410105.

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Evaluating the seismic stability of a rock slope typically involves searching for the minimum value of calculated safety factors (SF) for each supposed sliding block. Because only the transient equilibrium is evaluated, the likelihood of any slope failure can be deemed negligible if all the calculated SFs are greater than unity. However, even if some of the calculated SF are less than unity, it cannot be assumed that the slope will collapse. Recently, in the wake of extremely large earthquakes in Japan, the design earthquake standards for nuclear power plants (NPP) have been extended. After th

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Lemenkova, Polina. "GMT Based Comparative Geomorphological Analysis of the Vityaz and Vanuatu Trenches, Fiji Basin." Geodetski List 74(97), no. 1 (2020): 19–39. https://doi.org/10.5281/zenodo.3794155.

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<em>The study is geographically focused on the two deep-sea trenches: Vanu</em><em>atu and Vityaz, Fiji Basin, East Australia, located in the area of the double conver</em><em>gent complex boundary of Pacific and Indo-Australian plates in the North Fiji back- arc basin. Complex geophysical settings results in the formation of the trenches, seismicity, geodynamic complexity and instability of the region. The work aimed at modelling and comparative statistical analysis of the bathymetry and geomorphology of two trenches. Technically, the methodology of this work is based on the Generic Mapping T

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Aurin, Dirk, Antonio Mannino, and David Lary. "Remote Sensing of CDOM, CDOM Spectral Slope, and Dissolved Organic Carbon in the Global Ocean." Applied Sciences 8, no. 12 (2018): 2687. http://dx.doi.org/10.3390/app8122687.

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A Global Ocean Carbon Algorithm Database (GOCAD) has been developed from over 500 oceanographic field campaigns conducted worldwide over the past 30 years including in situ reflectances and coincident satellite imagery, multi- and hyperspectral Chromophoric Dissolved Organic Matter (CDOM) absorption coefficients from 245–715 nm, CDOM spectral slopes in eight visible and ultraviolet wavebands, dissolved and particulate organic carbon (DOC and POC, respectively), and inherent optical, physical, and biogeochemical properties. From field optical and radiometric data and satellite measurements, sev

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Lübbecke, Joke F., and Michael J. McPhaden. "Assessing the Twenty-First-Century Shift in ENSO Variability in Terms of the Bjerknes Stability Index*." Journal of Climate 27, no. 7 (2014): 2577–87. http://dx.doi.org/10.1175/jcli-d-13-00438.1.

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Abstract A decadal change in the character of ENSO was observed around year 2000 toward weaker-amplitude, higher-frequency events with an increased occurrence of central Pacific El Niños. Here these changes are assessed in terms of the Bjerknes stability index (BJ index), which is a measure of the growth rate of ENSO-related SST anomalies. The individual terms of the index are calculated from ocean reanalysis products separately for the time periods 1980–99 and 2000–10. The spread between the products is large, but they show a robust weakening of the thermocline feedback due to a reduced therm

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Anderson, Bruce T., and Eric Maloney. "Interannual Tropical Pacific Sea Surface Temperatures and Their Relation to Preceding Sea Level Pressures in the NCAR CCSM2." Journal of Climate 19, no. 6 (2006): 998–1012. http://dx.doi.org/10.1175/jcli3674.1.

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Abstract This paper describes aspects of tropical interannual ocean/atmosphere variability in the NCAR Community Climate System Model Version 2.0 (CCSM2). The CCSM2 tropical Pacific Ocean/atmosphere system exhibits much stronger biennial variability than is observed. However, a canonical correlation analysis technique decomposes the simulated boreal winter tropical Pacific sea surface temperature (SST) variability into two modes, both of which are related to atmospheric variability during the preceding boreal winter. The first mode of ocean/atmosphere variability is related to the strong bienn

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Alfaro Pinto, Alejandra, Juan J. Castillo Mont, David E. Mendieta Jiménez, Alex Guerra Noriega, Jorge Jiménez Barrios, and Andrea Clavijo McCormick. "Characterization of Riparian Tree Communities along a River Basin in the Pacific Slope of Guatemala." Forests 12, no. 7 (2021): 898. http://dx.doi.org/10.3390/f12070898.

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Ecosystem conservation in Mesoamerica, one of the world’s biodiversity hotspots, is a top priority because of the rapid loss of native vegetation due to anthropogenic activities. Riparian forests are often the only remaining preserved areas among expansive agricultural matrices. These forest remnants are essential to maintaining water quality, providing habitats for a variety of wildlife and acting as biological corridors that enable the movement and dispersal of local species. The Acomé river is located on the Pacific slope of Guatemala. This region is heavily impacted by intensive agricultur

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Hampton, M. A., H. A. Karl, and N. H. Kenyon. "Sea-floor drainage features of Cascadia Basin and the adjacent continental slope, northeast Pacific Ocean." Marine Geology 87, no. 2-4 (1989): 249–72. http://dx.doi.org/10.1016/0025-3227(89)90064-9.

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Saavedra-Rodríguez, Carlos A., and Vladimir Rojas-Díaz. "Chiroptera, mid-Calima River basin, Pacific slope of the Western Andes, Valle del Cauca, Colombia." Check List 7, no. 2 (2011): 166. http://dx.doi.org/10.15560/7.2.166.

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The Calima River Basin is part of the Chocó Biogeográfico Ecoregion in the Pacific Coast of Colombia. Here, we compile a bat species checklist recorded for the Basin and describe the bat diversity patterns found in the mid-Calima Basin (the gradient from 300 – 1,400 m a.s.l.). The checklist comprises 55 bat species for the Basin. In the mid-Calima, 31 bat species occur (permanently or seasonally). Our results show complementary diversity patterns of bat assemblages living below and above 1,000 m. We also identified an overlap zone between 800 – 1,200 m a.s.l. where at least three pairs of sist

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Saavedra-Rodríguez, Carlos, and Vladimir Rojas-Díaz. "Chiroptera, mid-Calima River basin, Pacific slope of the Western Andes, Valle del Cauca, Colombia." Check List 7, no. (2) (2011): 166–72. https://doi.org/10.15560/7.2.166.

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The Calima River Basin is part of the Chocó Biogeográfico Ecoregion in the Pacific Coast of Colombia. Here, we compile a bat species checklist recorded for the Basin and describe the bat diversity patterns found in the mid-Calima Basin (the gradient from 300 – 1,400 m a.s.l.). The checklist comprises 55 bat species for the Basin. In the mid-Calima, 31 bat species occur (permanently or seasonally). Our results show complementary diversity patterns of bat assemblages living below and above 1,000 m. We also identified an overlap zone between 800 – 1,200 m a.s.l. where at least three pairs of sist

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Hidalgo, Hugo G., Eric J. Alfaro, Franklin HernÃandez-Castro, and Paula M. Pérez-Briceño. "Identification of Tropical Cyclones’ Critical Positions Associated with Extreme Precipitation Events in Central America." Atmosphere 11, no. 10 (2020): 1123. http://dx.doi.org/10.3390/atmos11101123.

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Tropical cyclones are one of the most important causes of disasters in Central America. Using historical (1970–2010) tracks of cyclones in the Caribbean and Pacific basin, we identify critical path locations where these low-pressure systems cause the highest number of floods in a set of 88 precipitation stations in the region. Results show that tropical cyclones from the Caribbean and Pacific basin produce a large number of indirect impacts on the Pacific slope of the Central American isthmus. Although the direct impact of a tropical cyclone usually results in devastation in the affected regio

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Spall, Michael A., Robert S. Pickart, Min Li, et al. "Transport of Pacific Water Into the Canada Basin and the Formation of the Chukchi Slope Current." Journal of Geophysical Research: Oceans 123, no. 10 (2018): 7453–71. http://dx.doi.org/10.1029/2018jc013825.

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Clements, Nolan M., and James R. Tietz. "First Record of the Small-billed Elaenia (Elaenia parvirostris) for Western North America." Western Birds 54, no. 3 (2023): 208–14. http://dx.doi.org/10.21199/wb54.3.4.

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The Small-billed Elaenia (Elaenia parvirostris) is a small flycatcher common on the Atlantic slope of South America. The species breeds below 1000 m elevation in open woodlands, gardens, and forest edges from southern Brazil to northeastern Argentina and migrates north to spend the nonbreeding season in the northern Amazon Basin. Since 2012, it has been documented as a vagrant to North America, with four records from the United States and Canada to date. On the basis of one photographed on Southeast Farallon Island on 4 September 2022, we record a fifth Small-billed Elaenia in North America, a

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Berard, Neville, Sundar Prasad, Brett Miller, Mathieu Deiber, and Nathan Fuller. "PHYSICAL MODELLING OF PROPELLER SCOUR ON AN ARMOURED SLOPE." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 11. http://dx.doi.org/10.9753/icce.v36.sediment.11.

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CITIC Pacific Mining (CPM) is proposing to increase throughput at their existing Sino Iron Terminal in Cape Preston, Western Australia, using self-propelled Handysize transshipment shuttle vessels (TSV) instead of dumb barges. Initial assessment using various desktop methods (PIANC, 2015) indicated that the armoured rock slope adjacent to the berth face would incur damage due to wash from the vessel side thrusters and the main propeller. Large scale (13.5:1) physical model tests were undertaken in a 6 m x 15 m x 1.4 m deep basin at UNSW to measure wash velocity and armour stability. The physic

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Zhong, Shiyuan, Ju Li, Craig B. Clements, Stephan F. J. De Wekker, and Xindi Bian. "Forcing Mechanisms for Washoe Zephyr—A Daytime Downslope Wind System in the Lee of the Sierra Nevada." Journal of Applied Meteorology and Climatology 47, no. 1 (2008): 339–50. http://dx.doi.org/10.1175/2007jamc1576.1.

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Abstract This paper investigates the formation mechanisms for a local wind phenomenon known as Washoe Zephyr that occurs frequently in the lee of the Sierra Nevada. Unlike the typical thermally driven slope flows with upslope wind during daytime and downslope at night, the Washoe Zephyr winds blow down the lee slopes of the Sierra Nevada in the afternoon against the local pressure gradient. Long-term hourly surface wind data from several stations on the eastern slope of the Sierra Nevada and rawinsonde sounding data in the region are analyzed and numerical simulations are performed to test the

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Luchin, V. A. "Typical patterns of the water temperature distribution in the upper mixed layer of the Bering Sea in winter season." Izvestiya TINRO 203, no. 4 (2023): 944–60. http://dx.doi.org/10.26428/1606-9919-2023-203-944-960.

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Typical patterns of the water temperature distribution in the upper mixed layer of the Bering Sea in winter are determined on all available oceanographic data obtainedby research institutions of Russia, Japan, USA, and China. Previously [Luchin, 2023], the data were sorted to two sets presenting «cold» and «warm» winters. The proper set includes 2,492 oceanographic stations and the latter one – 2,130 stations. Spatial distribution of the temperature has some common patterns for both sets: the highest values (3–4 to 5–6 оC) are observed at the central and eastern passages between Aleutian Islan

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Xinrong, Cheng. "Calcareous Nannofossils in Surface Sediments of the Central and Northern Parts of the South China Sea." Journal of Micropalaeontology 11, no. 2 (1992): 167–76. http://dx.doi.org/10.1144/jm.11.2.167.

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Abstract. Taxonomic composition and quantitative distribution of calcareous nannofossils in the nothern and central parts of the South China Sea were studied in 146 samples of surface sediments taken from estuary, continental shelf, continental slope and deep-water basin. This paper reports distribution patterns of nannofossils in the area, including nannofossil abundance, species, assemblages and specimen size. Abundance increases from shelf to slope, with a decrease from the lower part of the slope towards the abyssal plain. The assemblages are dominated by Emiliania huxleyi, Gephyrocapsa oc

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Zhigulev, V. V., and A. V. Zhigulev. "Geological evolution of the northern Mid Kuril trough based on seismic facies analysis." Geosystems of Transition Zones 5, no. 3 (2021): 275–86. http://dx.doi.org/10.30730/gtrz.2021.5.3.275-286.

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The model of geological evolution of an interarc basin, which is the north-east ending of Mid Kuril trough located on the continental slope of Kuril-Kamchatka trench, was constructed. Seismic facies analysis was first applied to define sedimentation conditions in a deep water trench. The analysis was based on the 2D CDP reflection seismic data obtained by Dalmorneftegeophysica JSC in 2014. According to the modeling results, the basin began to form in the Late Cretaceous and passed several stages. Initial subsidence of a local crust area of the incipient basin changed over to its further separa

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Chernova, N. V., E. V. Vedischeva, and A. V. Datskii. "A New Species of Snailfishes (Liparidae) of the Genus Careproctus from the Northern Slope of the Aleutin Basin (Bering Sea)." Journal of Ichthyology 61, no. 4 (2021): 487–95. http://dx.doi.org/10.1134/s0032945221040020.

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Abstract— A new species of snailfishes Careproctus schmidti sp. nov. from the northwestern part of the Bering Sea is described. The specimen was caught in the mesobenthal of the Aleutian Basin at a depth of 852–862 m (holotype ZIN no. 56 620—female TL 194 mm). It is distinguished from the majority of congeners of the North Pacific Ocean by a set of features: a large number of vertebrae (63) and rays in the fins (D 56, A 50, P 34, C 10), the presence of two pairs of pleural ribs, a relatively elongated (21% SL) pectoral fin with a notch and short lower lobe (12% SL), two suprabranchial pores, s

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