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Journal articles on the topic 'Oceanic gyre'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Winter, Jordan, Annette Hynes, Chris Berthiaume, Kelsy Cain, E. Virginia Armbrust, and François Ribalet. "Shifts in phytoplankton community structure across oceanic boundaries." PLOS One 20, no. 6 (2025): e0324466. https://doi.org/10.1371/journal.pone.0324466.

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Phytoplankton communities play an important role in marine food webs and biogeochemical cycles. The transition zones between ocean gyres and surrounding waters represent critical ecological boundaries where environmental gradients drive significant shifts in phytoplankton community structure. This study investigates how nutrient availability and temperature shape the size distribution and composition of small phytoplankton (< 5 μm) communities across the North Pacific Subtropical Gyre (NPSG) boundaries, testing several ecological hypotheses that explain phytoplankton size distribution patte

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2

Tiedje, Bente, Armin Köhl, and Johanna Baehr. "Potential Predictability of the North Atlantic Heat Transport Based on an Oceanic State Estimate." Journal of Climate 25, no. 24 (2012): 8475–86. http://dx.doi.org/10.1175/jcli-d-11-00606.1.

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Abstract This paper investigates the potential predictability of the meridional heat transport (MHT) in the North Atlantic on interannual time scales using hindcast ensembles based on an oceanic data assimilation product. The work analyzes the prognostic potential predictability (PPP), using the ocean synthesis of the German partner of the consortium for Estimating the Circulation and Climate of the Ocean (GECCO) as initial conditions and as boundary conditions. The PPP of the MHT varies with latitude: local maxima are apparent within the subpolar and the subtropical gyres, and a minimum is ap

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3

Shimokawa, Shinya, and Tomonori Matsuura. "Chaotic Behaviors in the Response of a Quasigeostrophic Oceanic Double Gyre to Seasonal External Forcing." Journal of Physical Oceanography 40, no. 7 (2010): 1458–72. http://dx.doi.org/10.1175/2010jpo4400.1.

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Abstract In an oceanic double-gyre system, nonlinear oscillations of the ocean under seasonally changing external forcing are investigated using a 1.5-layer quasigeostrophic model and a simple model related to energy balance of the oceanic double gyre. In the experiments, the variable parameter is the amplitude of external seasonal forcing and the Reynolds number is fixed as 39, at which periodic shedding of inertial subgyres occurs. The authors found that entrainment (at 2 times the period of the forcing) and intermittency (on–off type), phenomena that are often seen in nonlinear systems, eme

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Kang, Sok Kuh, Young Ho Seung, Jong Jin Park, et al. "Seasonal Variability in Middepth Gyral Circulation Patterns in the Central East/Japan Sea as Revealed by Long-Term Argo Data." Journal of Physical Oceanography 46, no. 3 (2016): 937–46. http://dx.doi.org/10.1175/jpo-d-15-0157.1.

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AbstractTrajectories of Argo floats deployed in the East/Japan Sea from 2001 to 2014 reveal that the middepth gyral circulation pattern of the Japan basin, the central part of the East/Japan Sea, undergoes a seasonal variation. The middepth circulation of the Japan basin is found to be characterized usually by the gyres trapped to the east of the Bogorov Rise (E-gyres) and those extending farther westward into the whole basin (BW-gyres). The E-gyre trajectories are generally associated with the turning of the floats toward deeper regions off the isobaths. This occurs in winter either on the no

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Chong, Fiona, Matthew Spencer, Nikolai Maximenko, Jan Hafner, Andrew C. McWhirter, and Rebecca R. Helm. "High concentrations of floating neustonic life in the plastic-rich North Pacific Garbage Patch." PLOS Biology 21, no. 5 (2023): e3001646. http://dx.doi.org/10.1371/journal.pbio.3001646.

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Floating life (obligate neuston) is a core component of the ocean surface food web. However, only 1 region of high neustonic abundance is known so far, the Sargasso Sea in the Subtropical North Atlantic gyre, where floating life provides critical habitat structure and ecosystem services. Here, we hypothesize that floating life is also concentrated in other gyres with converging surface currents. To test this hypothesis, we collected samples through the eastern North Pacific Subtropical Gyre in the area of the North Pacific “Garbage Patch” (NPGP) known to accumulate floating anthropogenic debri

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6

Dellnitz, M., G. Froyland, C. Horenkamp, K. Padberg-Gehle, and A. Sen Gupta. "Seasonal variability of the subpolar gyres in the Southern Ocean: a numerical investigation based on transfer operators." Nonlinear Processes in Geophysics 16, no. 6 (2009): 655–63. http://dx.doi.org/10.5194/npg-16-655-2009.

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Abstract. The detection of regions in the ocean that are coherent over an extended period of time is a fundamental problem in many oceanic applications. For instance such regions are important for studying the transport of marine species and for the distribution of nutrients. In this study we demonstrate the efficacy of transfer operators in detecting and analysing such structures. We focus first on the detection of the Weddell and Ross Gyre for the four seasons spanning December 2003–November 2004 within the 3-D oceanic domain south of 30° S, and show distinct seasonal differences in both the

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7

Simonnet, Eric. "Quantization of the Low-Frequency Variability of the Double-Gyre Circulation." Journal of Physical Oceanography 35, no. 11 (2005): 2268–90. http://dx.doi.org/10.1175/jpo2806.1.

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Abstract The low-frequency dynamics of the double-gyre wind-driven circulation in large midlatitude oceanic basins is investigated. It is shown that for quasigeostrophic models linear (Rayleigh) friction is necessary to obtain realistic recirculation gyres and elongated jet streams with small meridional-to-zonal aspect ratio. It is also found that the use of either no-slip or free-slip boundary conditions does not change the drastic effects of bottom drag on the large scales. These long oceanic jets are alternatively destabilized and restabilized through successive (subcritical) supercritical

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8

Barrier, Nicolas, Christophe Cassou, Julie Deshayes, and Anne-Marie Treguier. "Response of North Atlantic Ocean Circulation to Atmospheric Weather Regimes." Journal of Physical Oceanography 44, no. 1 (2014): 179–201. http://dx.doi.org/10.1175/jpo-d-12-0217.1.

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Abstract A new framework is proposed for investigating the atmospheric forcing of North Atlantic Ocean circulation. Instead of using classical modes of variability, such as the North Atlantic Oscillation (NAO) or the east Atlantic pattern, the weather regimes paradigm was used. Using this framework helped avoid problems associated with the assumptions of orthogonality and symmetry that are particular to modal analysis and known to be unsuitable for the NAO. Using ocean-only historical and sensitivity experiments, the impacts of the four winter weather regimes on horizontal and overturning circ

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9

Wu, Yang, Xiangjun Zhao, Zhengdong Qi, Kai Zhou, and Dalei Qiao. "Relative Contribution of Atmospheric Forcing, Oceanic Preconditioning and Sea Ice to Deep Convection in the Labrador Sea." Journal of Marine Science and Engineering 11, no. 4 (2023): 869. http://dx.doi.org/10.3390/jmse11040869.

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The relative contribution of atmospheric forcing, oceanic preconditioning, and sea ice to Labrador Sea Deep Convection (LSDC) is investigated by conducting three ensemble experiments using a global coupled sea ice–ocean model for the first time. Simulated results show that the atmospheric activities dominate the interannual and decadal variability, accounting for 70% of LSDC. Oceanic preconditioning is more significant in the shallow LSDC years that the water column is stable, accounting for 21%, especially in the central Labrador Sea and Irminger Sea. Moreover, the sea ice contribution is neg

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10

Wilson, Earle A., Andrew F. Thompson, Andrew L. Stewart, and Shantong Sun. "Bathymetric Control of Subpolar Gyres and the Overturning Circulation in the Southern Ocean." Journal of Physical Oceanography 52, no. 2 (2022): 205–23. http://dx.doi.org/10.1175/jpo-d-21-0136.1.

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Abstract The subpolar gyres of the Southern Ocean form an important dynamical link between the Antarctic Circumpolar Current (ACC) and the coastline of Antarctica. Despite their key involvement in the production and export of bottom water and the poleward transport of oceanic heat, these gyres are rarely acknowledged in conceptual models of the Southern Ocean circulation, which tend to focus on the zonally averaged overturning across the ACC. To isolate the effect of these gyres on the regional circulation, we carried out a set of numerical simulations with idealized representations of the Wed

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Meccia, Virna L., Doroteaciro Iovino, and Alessio Bellucci. "North Atlantic gyre circulation in PRIMAVERA models." Climate Dynamics 56, no. 11-12 (2021): 4075–90. http://dx.doi.org/10.1007/s00382-021-05686-z.

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AbstractWe study the impact of horizontal resolution in setting the North Atlantic gyre circulation and representing the ocean–atmosphere interactions that modulate the low-frequency variability in the region. Simulations from five state-of-the-art climate models performed at standard and high-resolution as part of the High-Resolution Model Inter-comparison Project (HighResMIP) were analysed. In some models, the resolution is enhanced in the atmospheric and oceanic components whereas, in some other models, the resolution is increased only in the atmosphere. Enhancing the horizontal resolution

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Wen, Caihong, Ping Chang, and Ramalingam Saravanan. "Effect of Atlantic Meridional Overturning Circulation Changes on Tropical Atlantic Sea Surface Temperature Variability: A 2½-Layer Reduced-Gravity Ocean Model Study." Journal of Climate 23, no. 2 (2010): 312–32. http://dx.doi.org/10.1175/2009jcli3042.1.

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Abstract Previous coupled climate model simulations reveal that a dipole-like SST pattern with cooler (warmer) temperature over the north (south) tropical Atlantic emerges in response to a slowdown of the Atlantic meridional overturning circulation (AMOC). Using a 2½-layer reduced-gravity ocean model, a systematic investigation into oceanic processes controlling the tropical Atlantic sea surface temperature (SST) response to AMOC changes by varying the strength of northward mass transport at the open boundaries was conducted. It is found that the North Brazil Current (NBC) reverses its directi

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13

Pringle, J. D. "California Spiny Lobster (Panulirus interruptus) Larval Retention and Recruitment: A Review and Synthesis." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 11 (1986): 2142–52. http://dx.doi.org/10.1139/f86-263.

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The late Dr. M. W. Johnson studied Panulirus interruptus phyllosome larval natural history from samples collected between 1949 and 1955 inclusive on the California Cooperative Oceanic Fisheries Investigations (CalCOFI) grid. Despite wide broadcasting of larvae, he concluded that gyres and countercurrents must retain larvae to ensure recruitment to the population. The conclusions are reviewed and the data reinterpreted in light of both recent physical oceanographic information and congeneric biology. Phyllosome concentrations are highly aggregated within the California Current: 66% of the larva

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Dodge, Kara L., Benjamin Galuardi, and Molly E. Lutcavage. "Orientation behaviour of leatherback sea turtles within the North Atlantic subtropical gyre." Proceedings of the Royal Society B: Biological Sciences 282, no. 1804 (2015): 20143129. http://dx.doi.org/10.1098/rspb.2014.3129.

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Leatherback sea turtles ( Dermochelys coriacea ) travel thousands of kilometres between temperate feeding and tropical breeding/over-wintering grounds, with adult turtles able to pinpoint specific nesting beaches after multi-year absences. Their extensive migrations often occur in oceanic habitat where limited known sensory information is available to aid in orientation. Here, we examined the migratory orientation of adult male, adult female and subadult leatherbacks during their open-ocean movements within the North Atlantic subtropical gyre by analysing satellite-derived tracks from fifteen

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15

Wadley, Martin R., and Grant R. Bigg. "Are “Great Salinity Anomalies” Advective?" Journal of Climate 19, no. 7 (2006): 1080–88. http://dx.doi.org/10.1175/jcli3647.1.

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Abstract “Great Salinity Anomalies” (GSAs) have been observed to propagate around the North Atlantic subpolar gyre. Similar anomalies occur in the Third Hadley Centre Coupled Atmosphere–Ocean GCM (HadCM3) of preindustrial climate. It has been hypothesized that these salinity anomalies result from the advection of anomalously low salinity waters around the subpolar gyre. Here, the consequences of using passive tracers in the HadCM3 climate model to tag the anomalously low salinity water associated with a GSA in the Greenland and Labrador Seas are reported. Rather than predominantly advecting ar

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16

Mansfield, Katherine L., Jeanette Wyneken, Warren P. Porter, and Jiangang Luo. "First satellite tracks of neonate sea turtles redefine the ‘lost years’ oceanic niche." Proceedings of the Royal Society B: Biological Sciences 281, no. 1781 (2014): 20133039. http://dx.doi.org/10.1098/rspb.2013.3039.

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Few at-sea behavioural data exist for oceanic-stage neonate sea turtles, a life-stage commonly referred to as the sea turtle ‘lost years’. Historically, the long-term tracking of small, fast-growing organisms in the open ocean was logistically or technologically impossible. Here, we provide the first long-term satellite tracks of neonate sea turtles. Loggerheads ( Caretta caretta ) were remotely tracked in the Atlantic Ocean using small solar-powered satellite transmitters. We show that oceanic-stage turtles (i) rarely travel in Continental Shelf waters, (ii) frequently depart the currents ass

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Mansfield, Katherine L., Jeanette Wyneken, Warren P. Porter, and Jiangang Luo. "First satellite tracks of neonate sea turtles redefine the 'lost years' oceanic niche." Proceedings of the Royal Society B: Biological Sciences 281, no. 1781 (2014): 20133039. https://doi.org/10.5281/zenodo.13522493.

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(Uploaded by Plazi for the Bat Literature Project) Few at-sea behavioural data exist for oceanic-stage neonate sea turtles, a life-stage commonly referred to as the sea turtle 'lost years'. Historically, the long-term tracking of small, fast-growing organisms in the open ocean was logistically or technologically impossible. Here, we provide the first long-term satellite tracks of neonate sea turtles. Loggerheads ( Caretta caretta ) were remotely tracked in the Atlantic Ocean using small solar-powered satellite transmitters. We show that oceanic-stage turtles (i) rarely travel in Continental Sh

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18

Mansfield, Katherine L., Jeanette Wyneken, Warren P. Porter, and Jiangang Luo. "First satellite tracks of neonate sea turtles redefine the 'lost years' oceanic niche." Proceedings of the Royal Society B: Biological Sciences 281, no. 1781 (2014): 20133039. https://doi.org/10.5281/zenodo.13522493.

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(Uploaded by Plazi for the Bat Literature Project) Few at-sea behavioural data exist for oceanic-stage neonate sea turtles, a life-stage commonly referred to as the sea turtle 'lost years'. Historically, the long-term tracking of small, fast-growing organisms in the open ocean was logistically or technologically impossible. Here, we provide the first long-term satellite tracks of neonate sea turtles. Loggerheads ( Caretta caretta ) were remotely tracked in the Atlantic Ocean using small solar-powered satellite transmitters. We show that oceanic-stage turtles (i) rarely travel in Continental Sh

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Mansfield, Katherine L., Jeanette Wyneken, Warren P. Porter, and Jiangang Luo. "First satellite tracks of neonate sea turtles redefine the 'lost years' oceanic niche." Proceedings of the Royal Society B: Biological Sciences 281, no. 1781 (2014): 20133039. https://doi.org/10.5281/zenodo.13522493.

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(Uploaded by Plazi for the Bat Literature Project) Few at-sea behavioural data exist for oceanic-stage neonate sea turtles, a life-stage commonly referred to as the sea turtle 'lost years'. Historically, the long-term tracking of small, fast-growing organisms in the open ocean was logistically or technologically impossible. Here, we provide the first long-term satellite tracks of neonate sea turtles. Loggerheads ( Caretta caretta ) were remotely tracked in the Atlantic Ocean using small solar-powered satellite transmitters. We show that oceanic-stage turtles (i) rarely travel in Continental Sh

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20

Mansfield, Katherine L., Jeanette Wyneken, Warren P. Porter, and Jiangang Luo. "First satellite tracks of neonate sea turtles redefine the 'lost years' oceanic niche." Proceedings of the Royal Society B: Biological Sciences 281, no. 1781 (2014): 20133039. https://doi.org/10.5281/zenodo.13522493.

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(Uploaded by Plazi for the Bat Literature Project) Few at-sea behavioural data exist for oceanic-stage neonate sea turtles, a life-stage commonly referred to as the sea turtle 'lost years'. Historically, the long-term tracking of small, fast-growing organisms in the open ocean was logistically or technologically impossible. Here, we provide the first long-term satellite tracks of neonate sea turtles. Loggerheads ( Caretta caretta ) were remotely tracked in the Atlantic Ocean using small solar-powered satellite transmitters. We show that oceanic-stage turtles (i) rarely travel in Continental Sh

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21

Cerovečki, Ivana, and Roland A. de Szoeke. "Initially Forced Long Planetary Waves in the Presence of Nonzonal Mean Flow." Journal of Physical Oceanography 36, no. 3 (2006): 507–25. http://dx.doi.org/10.1175/jpo2864.1.

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Abstract The purpose of this paper is to understand how long planetary waves evolve when propagating in a subtropical gyre. The steady flow of a wind-driven vertically sheared model subtropical gyre is perturbed by Ekman pumping that is localized within a region of finite lateral extent and oscillates periodically at about the annual frequency after sudden initiation. Both the background flow and the infinitesimal perturbations are solutions of a 2½-layer model. The region of forcing is located in the eastern part of the gyre where the steady flow is confined to the uppermost layer (shadow zon

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Browning, Thomas J., Eric P. Achterberg, Insa Rapp, et al. "Nutrient co-limitation at the boundary of an oceanic gyre." Nature 551, no. 7679 (2017): 242–46. http://dx.doi.org/10.1038/nature24063.

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O'Kane, J. Philip. "The accumulation of decaying wastes in a model oceanic gyre." Mathematical Modelling 7, no. 2-3 (1986): 201–9. http://dx.doi.org/10.1016/0270-0255(86)90047-3.

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Lu, Jinling, Ling Du, and Shuhao Tao. "Long-term eddy modulation affects the meridional asymmetry of the halocline in the Beaufort Gyre." Ocean Science 19, no. 6 (2023): 1773–89. http://dx.doi.org/10.5194/os-19-1773-2023.

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Abstract. Against the background of wind-forcing change along with Arctic sea ice retreat, the mesoscale processes undergoing distinct variation in the Beaufort Gyre (BG) region are increasingly important to oceanic transport and energy cascades, and these changes subsequently put oceanic stratification into a new state. Here, the varying number and strength of eddies in the central Canada Basin (CB) and Chukchi–Beaufort continental slope are obtained based on mooring observations (2003–2018), altimetry measurements (1993–2019), and reanalysis data (1980–2020). In this paper, the variability i

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Qiu, Bo, and Shuiming Chen. "Decadal Variability in the Formation of the North Pacific Subtropical Mode Water: Oceanic versus Atmospheric Control." Journal of Physical Oceanography 36, no. 7 (2006): 1365–80. http://dx.doi.org/10.1175/jpo2918.1.

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Abstract In situ temperature and altimetrically derived sea surface height data are used to investigate the low-frequency variations in the formation of the North Pacific Ocean Subtropical Mode Water (STMW) over the past 12 yr. Inside the Kuroshio Extension (KE) recirculation gyre where STMW forms, the dominant signal is characterized by a gradual thinning in the late winter mixed layer depth and in the 16°–18°C thermostad layer from 1993 to 1999 and a subsequent steady thickening of these features after 2000. This same decadal signal is also seen in the low-potential-vorticity (PV) STMW layer

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Berloff, P., W. Dewar, S. Kravtsov, and J. McWilliams. "Ocean Eddy Dynamics in a Coupled Ocean–Atmosphere Model*." Journal of Physical Oceanography 37, no. 5 (2007): 1103–21. http://dx.doi.org/10.1175/jpo3041.1.

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Abstract The role of mesoscale oceanic eddies is analyzed in a quasigeostrophic coupled ocean–atmosphere model operating at a large Reynolds number. The model dynamics are characterized by decadal variability that involves nonlinear adjustment of the ocean to coherent north–south shifts of the atmosphere. The oceanic eddy effects are diagnosed by the dynamical decomposition method adapted for nonstationary external forcing. The main effects of the eddies are an enhancement of the oceanic eastward jet separating the subpolar and subtropical gyres and a weakening of the gyres. The flow-enhancing

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Pinault, Jean-Louis. "Weakening of the Geostrophic Component of the Gulf Stream: A Positive Feedback Loop on the Melting of the Arctic Ice Sheet." Journal of Marine Science and Engineering 11, no. 9 (2023): 1689. http://dx.doi.org/10.3390/jmse11091689.

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The North Atlantic gyre experiences both a significant temperature rise at high latitudes and a considerable weakening of the geostrophic component of the Gulf Stream, which is reflected by the 64-year fundamental gyral Rossby wave (GRW). This singular behavior compared to the South Atlantic and South Indian Ocean gyres highlights a feedback loop of Arctic ice sheet melting on mid-latitude Atlantic Ocean temperature. The warming of the northern oceanic gyre at high latitudes due to the retreat of Arctic ice sheet via the Labrador Current decreases the thermal gradient between the high and low

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Marafon-Almeida, André, Juliano Bicalho Pereira, and Luiz Fernando Loureiro Fernandes. "Distribution of the species of Lucifer Thompson, 1829 in the subtropical South Atlantic between parallels 20º and 30ºs." Brazilian Journal of Oceanography 64, no. 3 (2016): 217–26. http://dx.doi.org/10.1590/s1679-87592016099006403.

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Abstract The distribution of the species of Lucifer Thompson, 1829 (Decapoda: Luciferidae) in the South Atlantic Subtropical Gyre was assessed by the Brazil Transatlantic Commission in November and December 2009. The samples were collected at 83 stations on two profiles between Brazil and Africa (20 º and 30 ºS). Oblique hauls were performed with a WP-2 net up to 150 meters deep. A distinct sexual relationship was noted between the two species found and L. faxoni presented a significantly higher number of females relative to males 1:0.5 (X2 = 21.77, p = 0.0001). The L. typus sex ratio had sign

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Brown, Peter J., Michael P. Meredith, Loïc Jullion та ін. "Freshwater fluxes in the Weddell Gyre: results from δ 18 O". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, № 2019 (2014): 20130298. http://dx.doi.org/10.1098/rsta.2013.0298.

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Full-depth measurements of δ 18 O from 2008 to 2010 enclosing the Weddell Gyre in the Southern Ocean are used to investigate the regional freshwater budget. Using complementary salinity, nutrients and oxygen data, a four-component mass balance was applied to quantify the relative contributions of meteoric water (precipitation/glacial input), sea-ice melt and saline (oceanic) sources. Combination of freshwater fractions with velocity fields derived from a box inverse analysis enabled the estimation of gyre-scale budgets of both freshwater types, with deep water exports found to dominate the bud

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RADKO, TIMOUR, and MELVIN E. STERN. "On the propagation of oceanic mesoscale vortices." Journal of Fluid Mechanics 380 (February 10, 1999): 39–57. http://dx.doi.org/10.1017/s0022112098003371.

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An analytical theory is developed for a class of stable quasi-geostrophic vortices propagating either in the westward direction with supercritical velocities (c<−βR2d) or eastward, where Rd is the radius of deformation and β is the gradient of the Coriolis parameter. The numerical spectral calculations, initiated by the theoretical solutions, indicate that the supercritical vortices move initially with the predicted velocity, but later slow down to the speed of the long planetary waves. The period of time during which an eddy is propagating with its initial velocity is analysed as a functio

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Lee, Sang-Ki, and Chunzai Wang. "Tropical Atlantic Decadal Oscillation and Its Potential Impact on the Equatorial Atmosphere–Ocean Dynamics: A Simple Model Study." Journal of Physical Oceanography 38, no. 1 (2008): 193–212. http://dx.doi.org/10.1175/2007jpo3450.1.

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Abstract Simple coupled atmosphere–ocean models are used to study the potential influence of the tropical Atlantic Ocean decadal oscillation on the equatorial Atlantic atmosphere–ocean dynamics. Perturbing the model tropical Atlantic at the extratropics (25°–30°) with a decadal frequency, interhemispheric SST dipole mode emerges due to the wind–evaporation–SST feedback. Near the equator, a cross-equatorial oceanic gyre develops owing to the dipole-induced wind stress curl. Once formed, this oceanic gyre transports surface water across the equator from the cold to the warm hemisphere in the wes

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Guilderson, Thomas P., E. Brendan Roark, Paul D. Quay, Sarah R. Flood Page, and Christopher Moy. "Seawater Radiocarbon Evolution in the Gulf of Alaska: 2002 Observations." Radiocarbon 48, no. 1 (2006): 1–15. http://dx.doi.org/10.1017/s0033822200035359.

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Oceanic uptake and transport of bomb radiocarbon as 14CO2 created by atmospheric nuclear weapons testing in the 1950s and 1960s has been a useful diagnostic for determining the carbon transfer between the ocean and atmosphere. In addition, the distribution of 14C in the ocean can be used as a tracer of oceanic circulation. Results obtained on samples collected in the Gulf of Alaska in the summer of 2002 provide a direct comparison with results in the 1970s during GEOSECS and in the early 1990s during WOCE. The open gyre values are 20–40% lower than those documented in 1991 and 1993 (WOCE), alt

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McDonagh, Elaine L., and Brian A. King. "Oceanic Fluxes in the South Atlantic." Journal of Physical Oceanography 35, no. 1 (2005): 109–22. http://dx.doi.org/10.1175/jpo-2666.1.

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Abstract A box inverse of the World Ocean Circulation Experiment A10 (30°S) and A11 (nominally 45°S) sections in the South Atlantic Ocean was undertaken. The authors find a heat flux across A10 of 0.22 ± 0.08 PW, consistent with previous studies, and a heat flux of 0.43 ± 0.08 PW across A11. The A11 heat flux is lower than some previous analyses of this section but implies a plausible oceanic heat convergence (heat loss to the atmosphere) of 0.21 ± 0.10 PW. The difference is principally due to adding a cyclonic component to the circulation in the Cape Basin. As compared with the solution of ot

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Czaja, Arnaud. "Atmospheric Control on the Thermohaline Circulation." Journal of Physical Oceanography 39, no. 1 (2009): 234–47. http://dx.doi.org/10.1175/2008jpo3897.1.

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Abstract In an attempt to elucidate the role of atmospheric and oceanic processes in setting a vigorous ocean overturning circulation in the North Atlantic but not in the North Pacific, a comparison of the observed atmospheric circulation and net surface freshwater fluxes over the North Atlantic and Pacific basins is conducted. It is proposed that the more erratic meridional displacements of the atmospheric jet stream over the North Atlantic sector is instrumental in maintaining high surface salinities in its subpolar gyre. In addition, it is suggested that the spatial pattern of the net fresh

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Thomson, Keith A., W. James Ingraham Jr., Michael C. Healey, Paul H. LeBlond, Cornelius Groot, and Christopher G. Healey. "Computer Simulations of the Influence of Ocean Currents on Fraser River Sockeye Salmon (Oncorhynchus nerka) Return Times." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 2 (1994): 441–49. http://dx.doi.org/10.1139/f94-046.

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We hypothesized that the interannual variability of the northeast Pacific Ocean circulation affects the return times of Fraser River sockeye salmon (Oncorhynchus nerka). Homeward migrations were simulated for 1982 (with a relatively weak Alaska Gyre circulation) and 1983 (with a relatively strong circulation) in the context of three sequential return migration phases: a nondirected oceanic phase, a directed oceanic phase, and a directed coastal phase. Passive drifters were simulated to examine the influence of ocean currents during the nondirected oceanic phase: model fish south of 48°N were a

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Deshayes, Julie, and Claude Frankignoul. "Simulated Variability of the Circulation in the North Atlantic from 1953 to 2003." Journal of Climate 21, no. 19 (2008): 4919–33. http://dx.doi.org/10.1175/2008jcli1882.1.

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Abstract The variability of the circulation in the North Atlantic and its link with atmospheric variability are investigated in a realistic hindcast simulation from 1953 to 2003. The interannual-to-decadal variability of the subpolar gyre circulation and the Meridional Overturning Circulation (MOC) is mostly influenced by the North Atlantic Oscillation (NAO). Both circulations intensified from the early 1970s to the mid-1990s and then decreased. The monthly variability of both circulations reflects the fast barotropic adjustment to NAO-related Ekman pumping anomalies, while the interannual-to-

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Couespel, Damien, Marina Lévy, and Laurent Bopp. "Oceanic primary production decline halved in eddy-resolving simulations of global warming." Biogeosciences 18, no. 14 (2021): 4321–49. http://dx.doi.org/10.5194/bg-18-4321-2021.

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Abstract. The decline in ocean primary production is one of the most alarming consequences of anthropogenic climate change. This decline could indeed lead to a decrease in marine biomass and fish catch, as highlighted by recent policy-relevant reports. Because of computational constraints, current Earth system models used to project ocean primary production under global warming scenarios have to parameterize flows occurring below the resolution of their computational grid (typically 1∘). To overcome these computational constraints, we use an ocean biogeochemical model in an idealized configura

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Speich, S., H. Dijkstra, and M. Ghil. "Successive bifurcations in a shallow-water model applied to the wind-driven ocean circulation." Nonlinear Processes in Geophysics 2, no. 3/4 (1995): 241–68. http://dx.doi.org/10.5194/npg-2-241-1995.

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Abstract. Climate - the "coarse-gridded" state of the coupled ocean - atmosphere system - varies on many time and space scales. The challenge is to relate such variation to specific mechanisms and to produce verifiable quantitative explanations. In this paper, we study the oceanic component of the climate system and, in particular, the different circulation regimes of the mid-latitude win driven ocean on the interannual time scale. These circulations are dominated by two counterrotating, basis scale gyres: subtropical and subpolar. Numerical techniques of bifurcation theory are used to stud th

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Gasca, Rebeca, and Heyden Manzanilla-Dominguez. "Distribution and Abundance of Phyllosoma Larvae (Decapoda, Palinuridae) in the Southern Gulf of Mexico and the Western Caribbean Sea." Crustaceana 77, no. 1 (2004): 75–93. http://dx.doi.org/10.1163/156854004323037900.

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AbstractFrom plankton samples collected during two oceanographic expeditions in the southern Gulf of Mexico (1991) and five in the Mexican Caribbean Sea, we studied the composition, abundance, and distribution of the phyllosoma larvae. A total of 118 phyllosomas belonging to five species of lobster were recorded. Panulirus argus was the most abundant and dominant, it represented 73.9% of the total number of phyllosomas collected, followed by Scyllarides aequinoctialis (18.0%). The phyllosomas were distributed mainly in the coastal areas, with decreasing densities oceanwards. Highest larval con

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Ostrom, Peggy H., Anne E. Wiley, Helen F. James, et al. "Broad-scale trophic shift in the pelagic North Pacific revealed by an oceanic seabird." Proceedings of the Royal Society B: Biological Sciences 284, no. 1851 (2017): 20162436. http://dx.doi.org/10.1098/rspb.2016.2436.

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Human-induced ecological change in the open oceans appears to be accelerating. Fisheries, climate change and elevated nutrient inputs are variously blamed, at least in part, for altering oceanic ecosystems. Yet it is challenging to assess the extent of anthropogenic change in the open oceans, where historical records of ecological conditions are sparse, and the geographical scale is immense. We developed millennial-scale amino acid nitrogen isotope records preserved in ancient animal remains to understand changes in food web structure and nutrient regimes in the oceanic realm of the North Paci

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Nilsson, Johan, and Heiner Körnich. "A Conceptual Model of the Surface Salinity Distribution in the Oceanic Hadley Cell." Journal of Climate 21, no. 24 (2008): 6586–98. http://dx.doi.org/10.1175/2008jcli2284.1.

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Abstract A conceptual model of the salinity distribution in the oceanic Hadley cell is presented. The model pertains to the region of tropical easterly surface winds, where the surface salinity increases poleward from a local salinity minimum near the equator to a subtropical salinity maximum. A fundamental constraint is that the meridional freshwater transports in the atmosphere and the ocean have the same magnitude but opposite directions. A key assumption is that the strength of the meridional overturning cells in the atmosphere and the ocean is proportional and set by the surface layer Ekm

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Clement Kinney, J., and W. Maslowski. "On the oceanic communication between the Western Subarctic Gyre and the deep Bering Sea." Deep Sea Research Part I: Oceanographic Research Papers 66 (August 2012): 11–25. http://dx.doi.org/10.1016/j.dsr.2012.04.001.

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Allen, Andrew E., Melissa G. Booth, Marc E. Frischer, Peter G. Verity, Jonathan P. Zehr, and Sabino Zani. "Diversity and Detection of Nitrate Assimilation Genes in Marine Bacteria." Applied and Environmental Microbiology 67, no. 11 (2001): 5343–48. http://dx.doi.org/10.1128/aem.67.11.5343-5348.2001.

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ABSTRACT A PCR approach was used to construct a database of nasAgenes (called narB genes in cyanobacteria) and to detect the genetic potential for heterotrophic bacterial nitrate utilization in marine environments. A nasA-specific PCR primer set that could be used to selectively amplify the nasA gene from heterotrophic bacteria was designed. Using seawater DNA extracts obtained from microbial communities in the South Atlantic Bight, the Barents Sea, and the North Pacific Gyre, we PCR amplified and sequencednasA genes. Our results indicate that several groups of heterotrophic bacterial nasA gen

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Landolfi, A., H. Dietze, W. Koeve, R. Mather, and R. Sanders. "Organic nutrients as sources of N and P to the upper layers of the North Atlantic subtropical gyre along 24.5° N." Biogeosciences Discussions 7, no. 3 (2010): 4001–44. http://dx.doi.org/10.5194/bgd-7-4001-2010.

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Abstract. There is a longstanding discussion on how the macronutrient requirement of the export production in the North Atlantic subtropical gyre is sustained. In this study we asses the role of dissolved organic nitrogen (DON) and phosphorous (DOP) as sources of new nutrients into the North Atlantic subtropical gyre at 24.5° N. We define, based on measurements of DON, DOP, phytoplankton community structure, stable nitrogen isotopic signals, surface mixed layer depth and ocean color as viewed from space, four regions characterized by different nutrient supply regimes. Within these regions, two

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Renault, Lionel, M. Jeroen Molemaker, Jonathan Gula, Sebastien Masson, and James C. McWilliams. "Control and Stabilization of the Gulf Stream by Oceanic Current Interaction with the Atmosphere." Journal of Physical Oceanography 46, no. 11 (2016): 3439–53. http://dx.doi.org/10.1175/jpo-d-16-0115.1.

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AbstractThe Gulf Stream (GS) is known to have a strong influence on climate, for example, by transporting heat from the tropics to higher latitudes. Although the GS transport intensity presents a clear interannual variability, satellite observations reveal its mean path is stable. Numerical models can simulate some characteristics of the mean GS path, but persistent biases keep the GS separation and postseparation unstable and therefore unrealistic. This study investigates how the integration of ocean surface currents into the ocean–atmosphere coupling interface of numerical models impacts the

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Yang, Xiaosong, Anthony Rosati, Shaoqing Zhang, et al. "A Predictable AMO-Like Pattern in the GFDL Fully Coupled Ensemble Initialization and Decadal Forecasting System." Journal of Climate 26, no. 2 (2013): 650–61. http://dx.doi.org/10.1175/jcli-d-12-00231.1.

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Abstract The decadal predictability of sea surface temperature (SST) and 2-m air temperature (T2m) in the Geophysical Fluid Dynamics Laboratory (GFDL) decadal hindcasts, which are part of the Fifth Coupled Model Intercomparison Project experiments, has been investigated using an average predictability time (APT) analysis. Comparison of retrospective forecasts initialized using the GFDL Ensemble Coupled Data Assimilation system with uninitialized historical forcing simulations using the same model allows identification of the internal multidecadal pattern (IMP) for SST and T2m. The IMP of SST i

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Yi, Daling Li, Bolan Gan, Lixin Wu, and Arthur J. Miller. "The North Pacific Gyre Oscillation and Mechanisms of Its Decadal Variability in CMIP5 Models." Journal of Climate 31, no. 6 (2018): 2487–509. http://dx.doi.org/10.1175/jcli-d-17-0344.1.

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Based on the Simple Ocean Data Assimilation (SODA) product and 37 models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) database, the North Pacific Gyre Oscillation (NPGO) and its decadal generation mechanisms are evaluated by studying the second leading modes of North Pacific sea surface height (SSH) and sea level pressure (SLP) as well as their dynamical connections. It is found that 17 out of 37 models can well simulate the spatial pattern and decadal time scales (10–30 yr) of the NPGO mode, which resembles the observation-based SODA results. Dynamical connections between

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Rainville, Luc, Steven R. Jayne, and Meghan F. Cronin. "Variations of the North Pacific Subtropical Mode Water from Direct Observations." Journal of Climate 27, no. 8 (2014): 2842–60. http://dx.doi.org/10.1175/jcli-d-13-00227.1.

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Abstract Mooring measurements from the Kuroshio Extension System Study (June 2004–June 2006) and from the ongoing Kuroshio Extension Observatory (June 2004–present) are combined with float measurements of the Argo network to study the variability of the North Pacific Subtropical Mode Water (STMW) across the entire gyre, on time scales from days, to seasons, to a decade. The top of the STMW follows a seasonal cycle, although observations reveal that it primarily varies in discrete steps associated with episodic wind events. The variations of the STMW bottom depth are tightly related to the sea

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CORBIÈRE, ANTOINE, NICOLAS METZL, GILLES REVERDIN, CHRISTIAN BRUNET, and TARO TAKAHASHI. "Interannual and decadal variability of the oceanic carbon sink in the North Atlantic subpolar gyre." Tellus B 59, no. 2 (2007): 168–78. http://dx.doi.org/10.1111/j.1600-0889.2006.00232.x.

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Bates, Nicholas R. "Interannual variability of oceanic CO2 and biogeochemical properties in the Western North Atlantic subtropical gyre." Deep Sea Research Part II: Topical Studies in Oceanography 48, no. 8-9 (2001): 1507–28. http://dx.doi.org/10.1016/s0967-0645(00)00151-x.

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