Articles | Volume 19, issue 8
https://doi.org/10.5194/gmd-19-3109-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-19-3109-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Methods for assessment of models
| 
22 Apr 2026
Methods for assessment of models |
| 22 Apr 2026
| 22 Apr 2026
Controls of the latitudinal migration of the Brazil-Malvinas confluence described in MOM6-SWA14
Nicole Cristine Laureanti
CORRESPONDING AUTHOR
Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
Potsdam Institute for Climate Impact Research, Potsdam, BB, Germany
National Institute for Space Research (INPE), Cachoeira Paulista, SP, Brazil
Enrique Curchitser
Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
Katherine Hedstrom
College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK, USA
Alistair Adcroft
Princeton University, Princeton, NJ, USA
Robert Hallberg
NOAA/OAR/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA
Matthew J. Harrison
NOAA/OAR/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA
Raphael Dussin
UCAR, Boulder, CO, USA
Sin Chan Chou
National Institute for Space Research (INPE), Cachoeira Paulista, SP, Brazil
Paulo Nobre
National Institute for Space Research (INPE), Cachoeira Paulista, SP, Brazil
Emanuel Giarolla
National Institute for Space Research (INPE), Cachoeira Paulista, SP, Brazil
Rosio Camayo
National Institute for Space Research (INPE), Cachoeira Paulista, SP, Brazil
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Cited articles
Adcroft, A. and Campin, J.-M.: Rescaled height coordinates for accurate representation of free-surface flows in ocean circulation models, Ocean Model., 7, 269–284, https://doi.org/10.1016/j.ocemod.2003.09.003, 2004.
Adcroft, A., Anderson, W., Balaji, V., Blanton, C., Bushuk, M., Dufour, C. O., Dunne, J. P., Griffies, S. M., Hallberg, R., Harrison, M. J., Held, I. M., Jansen, M. F., John, J. G., Krasting, J. P., Langenhorst, A. R., Legg, S., Liang, Z., McHugh, C., Radhakrishnan, A., Reichl, B. G., Rosati, T., Samuels, B. L., Shao, A., Stouffer, R., Winton, M., Wittenberg, A. T., Xiang, B., Zadeh, N., and Zhang, R.: The GFDL Global Ocean and Sea Ice Model OM4.0: Model Description and Simulation Features, J. Adv. Model. Earth Sy., 11, 3167–3211, https://doi.org/10.1029/2019MS001726, 2019.
Alford, M. H., MacKinnon, J. A., Simmons, H. L., and Nash, J. D.: Near-Inertial Internal Gravity Waves in the Ocean, Annu. Rev. Mar. Sci., 8, 95–123, 2016.
Artana, C. and Provost, C.: Intense anticyclones at the global Argentine Basin array of the Ocean Observatory Initiative, Ocean Sci., 19, 953–971, https://doi.org/10.5194/os-19-953-2023, 2023.
Artana, C., Provost, C., Lellouche, J.-M., Rio, M.-H., Ferrari, R., and Sennéchael, N.: The Malvinas Current at the Confluence with the Brazil Current: Inferences from 25 years of Mercator Ocean reanalysis, J. Geophys. Res.-Oceans, 124, 7178–7200, https://doi.org/10.1029/2019JC015289, 2019.
Artana, C., Provost, C., Poli, L., Ferrari, R., and Lellouche, J.-M.: Revisiting the Malvinas Current upper circulation and water masses using a highresolution ocean reanalysis, J. Geophys. Res.-Oceans, 126, https://doi.org/10.1029/2021JC017271, 2021.
Barré, N., Provost, C., and Saraceno, M.: Spatial and temporal scales of the Brazil–Malvinas Current confluence documented by simultaneous MODIS Aqua 1.1 km resolution SST and color images, Adv. Space Res., 37, 770–786, https://doi.org/10.1016/J.ASR.2005.09.026, 2006.
Bonou, F. K., Noriega, C., Lefèvre, N., and Araujo, M.: Distribution of CO2 parameters in the Western Tropical Atlantic Ocean, Dynam. Atmos. Oceans, 73, 47–60, https://doi.org/10.1016/J.DYNATMOCE.2015.12.001, 2016.
Bueno, L. F., Costa, V. S., Mill, G. N., and Paiva, A. M.: Volume and Heat Transports by North Brazil Current Rings, Frontiers in Marine Science, 9, https://doi.org/10.3389/fmars.2022.831098, 2022.
Campos, P. C., Möller, O. O., Piola, A. R., and Palma, E. D.: Seasonal variability and coastal upwelling near Cape Santa Marta (Brazil), J. Geophys. Res.-Oceans, 118, 1420–1433, https://doi.org/10.1002/JGRC.20131, 2013.
Chassignet, E. P. and Xu, X.: On the Importance of High-Resolution in Large-Scale Ocean Models, https://doi.org/10.1007/s00376-021-0385-7, 2021.
Combes, V. and Matano, R. P.: A two-way nested simulation of the oceanic circulation in the Southwestern Atlantic, J. Geophys. Res.-Oceans, 119, 731–756, https://doi.org/10.1002/2013JC009498, 2014a.
Combes, V. and Matano, R. P.: Trends in the Brazil/Malvinas Confluence region, Geophys. Res. Lett., 41, 8971–8977, https://doi.org/10.1002/2014GL062523, 2014b.
Combes, V. and Matano, R. P.: The Patagonian shelf circulation: Drivers and variability, Prog. Oceanogr., 167, 24–43, https://doi.org/10.1016/J.POCEAN.2018.07.003, 2018.
de Boyer Montégut, C., Madec, G., Fischer, A. S., Lazar, A., and Iudicone, D.: Mixed layer depth over the global ocean: An examination of profile data and a profile-based climatology, J. Geophys. Res.-Oceans, 109, https://doi.org/10.1029/2004JC002378, 2004 (data available at: https://mld.ifremer.fr/Surface_Mixed_Layer_Depth.php, last access: 28 March 2026).
Egbert, G. D. and Erofeeva, S. Y.: Efficient Inverse Modeling of Barotropic Ocean Tides, J. Atmos. Ocean. Tech., 19, 183–204, https://doi.org/10.1175/1520-0426(2002)019<0183:EIMOBO>2.0.CO;2, 2002 (data available at: https://www.tpxo.net/home, last access: 28 March 2026).
Ferrari, R., Artana, C., Saraceno, M., Piola, A. R., and Provost, C.: Satellite Altimetry and Current-Meter Velocities in the Malvinas Current at 41° S: Comparisons and Modes of Variations, J. Geophys. Res.-Oceans, 122, 9572–9590, https://doi.org/10.1002/2017JC013340, 2017.
Fox-Kemper, B., Danabasoglu, G., Ferrari, R., Griffies, S. M., Hallberg, R. W., Holland, M. M., Maltrud, M. E., Peacock, S., and Samuels, B. L.: Parameterization of mixed layer eddies. III: Implementation and impact in global ocean climate simulations, Ocean Model., 39, 61–78, https://doi.org/10.1016/j.ocemod.2010.09.002, 2011.
Franco, B. C., Defeo, O., Piola, A. R., Barreiro, M., Yang, H., Ortega, L., Gianelli, I., Castello, J. P., Vera, C., Buratti, C., Pájaro, M., Pezzi, L. P., and Möller, O. O.: Climate change impacts on the atmospheric circulation, ocean, and fisheries in the southwest South Atlantic Ocean: a review, Climatic Change, 162, 2359–2377, https://doi.org/10.1007/S10584-020-02783-6, 2020.
Garzoli, S. L. and Bianchi, A.: Time-space variability of the local dynamics of the Malvinas-Brazil confluence as revealed by inverted echosounders, J. Geophys. Res.-Oceans, 92, 1914–1922, https://doi.org/10.1029/JC092iC02p01914, 1987.
Garzoli, S. L., Ffield, A., Johns, W. E., and Yao, Q.: North Brazil Current retroflection and transports, J. Geophys. Res.-Oceans, 109, https://doi.org/10.1029/2003JC001775, 2004.
Giribabu, D., Hari, R., Sharma, J., Ghosh, K., Padiyar, N., Sharma, A., Bera, A. K., and Srivastav, S. K.: Assessment of GEBCO 2023 Gridded Bathymetric Data in Shallow Waters Using the Seafloor from ICESat-2 Photons, Research Square [preprint], https://doi.org/10.21203/rs.3.rs-3020167/v1, 2023 (data available at: https://download.gebco.net/, last access: 25 March 2026).
Goni, G. J., Bringas, F., and DiNezio, P. N.: Observed low frequency variability of the Brazil Current front, J. Geophys. Res.-Oceans, 116, https://doi.org/10.1029/2011JC007198, 2011.
Griffies, S. M., Böning, C., Bryan, F. O., Chassignet, E. P., Gerdes, R., Hasumi, H., Hirst, A., Treguier, A.-M., and Webb, D.: Developments in ocean climate modelling, Ocean Model., 2, 123–192, https://doi.org/10.1016/S1463-5003(00)00014-7, 2000.
Griffies, S. M., Winton, M., Anderson, W. G., Benson, R., Delworth, T. L., Dufour, C. O., Dunne, J. P., Goddard, P., Morrison, A. K., Rosati, A., Wittenberg, A. T., Yin, J., and Zhang, R.: Impacts on ocean heat from transient mesoscale eddies in a hierarchy of climate models, J. Climate, 28, 952–977, https://doi.org/10.1175/JCLI-D-14-00353.1, 2015.
Guerra, L. A. A., Paiva, A. M., and Chassignet, E. P.: On the translation of Agulhas rings to the western South Atlantic Ocean, Deep-Sea Res. Pt. I, 139, 104–113, 2018.
Guerrero, R. A., Piola, A. R., Fenco, H., Matano, R. P., Combes, V., Chao, Y., James, C., Palma, E. D., Saraceno, M., and Strub, P. T.: The salinity signature of the cross-shelf exchanges in the Southwestern Atlantic Ocean: Satellite observations, J. Geophys. Res.-Oceans, 119, 7794–7810, https://doi.org/10.1002/2014JC010113, 2014.
Hallberg, R.: Using a resolution function to regulate parameterizations of oceanic mesoscale eddy effects, Ocean Model., 72, 92–103, https://doi.org/10.1016/j.ocemod.2013.08.007, 2013.
Hersbach, H., Bell, B., Berrisford, P., Biavati, G., Horányi, A., Muñoz Sabater, J., Nicolas, J., Peubey, C., Radu, R., Rozum, I., Schepers, D., Simmons, A., Soci, C., Dee, D., and Thépaut, J.-N.: ERA5 hourly data on single levels from 1940 to present, Copernicus Climate Change Service (C3S) Climate Data Store (CDS) [data set], https://doi.org/10.24381/cds.adbb2d47, 2023.
Hoffman, R. N. and Leidner, S. M.: An Introduction to the Near–Real–Time QuikSCAT Data, Weather Forecast., 20, 476–493, https://doi.org/10.1175/WAF841.1, 2005 (data available at: https://podaac.jpl.nasa.gov/QuikSCAT?tab=-mission-objectives§ions=about%2Bdata, last access: 25 March 2026).
Hughes, C. W., Fukumori, I., Griffies, S. M., Huthnance, J. M., Minobe, S., Spence, P., Thompson, K. R., and Wise, A.: Sea Level and the Role of Coastal Trapped Waves in Mediating the Influence of the Open Ocean on the Coast, Surv. Geophys., 40, 1467–1492, https://doi.org/10.1007/s10712-019-09535-x, 2019.
Jackson, L., Hallberg, R., and Legg, S.: A Parameterization of Shear-Driven Turbulence for Ocean Climate Models, J. Phys. Oceanogr., 38, 1033–1053, https://doi.org/10.1175/2007JPO3779.1, 2008.
Jean-Michel, L., Eric, G., Romain, B.-B., Gilles, G., Angélique, M., Marie, D., Clément, B., Mathieu, H., Olivier, L. G., Charly, R., Tony, C., Charles-Emmanuel, T., Florent, G., Giovanni, R., Mounir, B., Yann, D., and Pierre-Yves, L. T.: The Copernicus Global
Kang, D., Curchitser, E. N., and Rosati, A.: Seasonal Variability of the Gulf Stream Kinetic Energy, J. Phys. Oceanogr., 46, 1189–1207, https://doi.org/10.1175/JPO-D-15-0235.1, 2016.
Kendall, M. G.: Rank Correlation Methods, 4th edn., Charles Griffin, London, ISBN 9780852641996, 1975.
Lago, L. S., Saraceno, M., Martos, P., Guerrero, R. A., Piola, A. R., Paniagua, G. F., Ferrari, R., Artana, C. I., and Provost, C.: On the Wind Contribution to the Variability of Ocean Currents Over Wide Continental Shelves: A Case Study on the Northern Argentine Continental Shelf, J. Geophys. Res.-Oceans, 124, 7457–7472, https://doi.org/10.1029/2019JC015105, 2019.
Laureanti, N. C., Chou, S. C., Nobre, P., and Curchitser, E.: On the relationship between the South Atlantic Convergence Zone and sea surface temperature during Central-East Brazil extreme precipitation events, Dynam. Atmos. Oceans, 105, https://doi.org/10.1016/j.dynatmoce.2023.101422, 2024.
Laureanti, N. C., Curchitser, E., Hedstrom, K., Adcroft, A., Halberg, R., Matthews, H., Dussin, R., Chou, S. C., Nobre, P., Giarolla, E., and Camayo, R.: MOM6-SWA14 model code, Zenodo [code], https://doi.org/10.5281/zenodo.17252994, 2025a.
Laureanti, N. C., Curchitser, E., Hedstrom, K., Adcroft, A., Halberg, R., Harrison, M., Dussin, R., Chou, S. C., Nobre, P., Giarolla, E., and Camayo, R.: “Controls of the Latitudinal Migration of the Brazil-Malvinas Confluence described on MOM6-SWA14” model set-up scripts and files, Zenodo [code], https://doi.org/10.5281/zenodo.17252554, 2025b.
Laureanti, N. C., Curchitser, E., Hedstrom, K., Adcroft, A., Hallberg, R., Matthews, H., Dussin, R., Chou, S. C., Nobre, P., Camayo, R., and Giarolla, E.: “Controls of the Latitudinal Migration of the Brazil-Malvinas Confluence described on MOM6-SWA14” figures scripts and files, Zenodo [code], https://doi.org/10.5281/zenodo.18498115, 2026.
Locarnini, R., Mishonov, A., Baranova, O., Boyer, T., Zweng, M., Garcia, H., Reagan, J., Seidov, D., Weathers, K., Paver, C., Smolyar, I., and Locarnini, R.: World Ocean Atlas 2018, Vol. 1: Temperature, A. Mishonov Technical Ed.; NOAA Atlas NESDIS 81, 52 pp., https://doi.org/10.25923/e5rn-9711, 2019.
Lumpkin, R. and Garzoli, S.: Interannual to decadal changes in the western South Atlantic's surface circulation, J. Geophys. Res.-Oceans, 116, https://doi.org/10.1029/2010JC006285, 2011.
Lumpkin, R. and Garzoli, S. L.: Near-surface circulation in the Tropical Atlantic Ocean, Deep-Sea Res. Pt. I, 52, 495–518, https://doi.org/10.1016/J.DSR.2004.09.001, 2005.
Mann, H. B.: Non-parametric tests against trend, Econometrica, 13, 163–171, 1945.
Müller, V. and Melnichenko, O.: Meridional Eddy Heat Transport Variability in the Surface Mixed Layer of the Atlantic Ocean, J. Geophys. Res.-Oceans, 126, e2021JC017789, https://doi.org/10.1029/2021JC017789, 2021.
NASA: Sea-viewing Wide Field-of-view Sensor (SeaWiFS) level-2 ocean color data, NASA Ocean Biology Processing Group distributed Sctive Archive Center, https://oceandata.sci.gsfc.nasa.gov/api/file_search/ (last access: 28 March 2026), 2018.
NOAA (National Oceanic and Atmospheric Administration): Physical Sciences Laboratory (PSL). Climate Indices: Monthly Atmospheric and Ocean Time-Series, https://psl.noaa.gov/data/climateindices/list/, last access: 15 May 2024.
Nobre, P., Lemos, A. T., Giarolla, E., Camayo, R., Namikawa, L., Kampel, M., Rudorff, N., Bezerra, D. X., Lorenzzetti, J., and Gomes, J.: The 2019 northeast Brazil oil spill: scenarios, An. Acad. Bras. Cienc., 94, e20210391, https://doi.org/10.1590/0001-3765202220210391, 2022.
Oliveira, L. R., Piola, A. R., Mata, M. M., and Soares, I. D.: Brazil Current surface circulation and energetics observed from drifting buoys, J. Geophys. Res.-Oceans, 114, 10006, https://doi.org/10.1029/2008JC004900, 2009.
Palma, E. D., Matano, R. P., and Piola, A. R.: A numerical study of the Southwestern Atlantic Shelf circulation: Barotropic response to tidal and wind forcing, J. Geophys. Res.-Oceans, 109, 8014, https://doi.org/10.1029/2004JC002315, 2004.
Palma, E. D., Matano, R. P., and Piola, A. R.: A numerical study of the Southwestern Atlantic Shelf circulation: Stratified ocean response to local and offshore forcing, J. Geophys. Res.-Oceans, 113, 11010, https://doi.org/10.1029/2007JC004720, 2008.
Peterson, R. G.: The boundary currents in the western Argentine Basin, Deep-Sea Res., 39, 623–644, https://doi.org/10.1016/0198-0149(92)90092-8, 1992.
Pezzi, L. P., Quadro, M. F., Lorenzzetti, J. A., Miller, A. J., Rosa, E. B., Lima, L. N., and Sutil, U. A.: The effect of Oceanic South Atlantic Convergence Zone episodes on regional SST anomalies: the roles of heat fluxes and upper-ocean dynamics, Clim. Dynam., 59, 2041–2065, https://doi.org/10.1007/s00382-022-06195-3, 2022.
Piola, A. R., Matano, R. P., Palma, E. D., Möller, O. O., and Campos, E. J. D.: The influence of the Plata River discharge on the western South Atlantic shelf, Geophys. Res. Lett., 32, 1–4, https://doi.org/10.1029/2004GL021638, 2005.
Poli, L., Artana, C., and Provost, C.: Topographically trapped waves around South America with periods between 40 and 130 d in a global ocean reanalysis, J. Geophys. Res.-Oceans, 127, e2021JC018067, https://doi.org/10.1029/2021JC018067, 2022.
Pontes, G. M. and Menviel, L.: Weakening of the Atlantic Meridional Overturning Circulation driven by subarctic freshening since the mid-twentieth century, Nat. Geosci., 17, 1291–1298, https://doi.org/10.1038/s41561-024-01568-1, 2024.
Reagan, J. R., Boyer, T. P., García, H. E., Locarnini, R. A., Baranova, O. K., Bouchard, C., Cross, S. L., Mishonov, A. V., Paver, C. R., Seidov, D., Wang, Z., and Dukhovskoy, D.: World Ocean Atlas 2023. Salinity and Temperature, NOAA National Centers for Environmental Information [data set], https://doi.org/10.25921/va26-hv25, 2023.
Reichl, B. G. and Hallberg, R.: A simplified energetics based planetary boundary layer (ePBL) approach for ocean climate simulations, Ocean Model., 132, 112–129, https://doi.org/10.1016/j.ocemod.2018.10.004, 2018.
Risaro, D. B., Chidichimo, M. P., and Piola, A. R.: Interannual Variability and Trends of Sea Surface Temperature Around Southern South America, Frontiers in Marine Science, 9, https://doi.org/10.3389/fmars.2022.829144, 2022.
Rodrigues, R. R., Taschetto, A. S., sen Gupta, A., and Foltz, G. R.: Common cause for severe droughts in South America and marine heatwaves in the South Atlantic, Nat. Geosci., 12, 620–626, https://doi.org/10.1038/s41561-019-0393-8, 2019.
Ross, A. C., Stock, C. A., Adcroft, A., Curchitser, E., Hallberg, R., Harrison, M. J., Hedstrom, K., Zadeh, N., Alexander, M., Chen, W., Drenkard, E. J., du Pontavice, H., Dussin, R., Gomez, F., John, J. G., Kang, D., Lavoie, D., Resplandy, L., Roobaert, A., Saba, V., Shin, S.-I., Siedlecki, S., and Simkins, J.: A high-resolution physical–biogeochemical model for marine resource applications in the northwest Atlantic (MOM6-COBALT-NWA12 v1.0), Geosci. Model Dev., 16, 6943–6985, https://doi.org/10.5194/gmd-16-6943-2023, 2023.
Servain, J., Busalacchi, A., McPhaden, M., Moura, A., Reverfdin, G., Vianna, M., and Zebiak, S.: A pilot research moored array in the tropical Atlantic (PIRATA), B. Am. Meteorol. Soc., 79, 2019–2032, https://doi.org/10.1175/1520-0477(1998)079<2019:APRMAI>2.0.CO;2, 1998 (data available at: https://www.pmel.noaa.gov/gtmba/pmel-theme/atlantic-ocean-pirata last access: 25 March 2026).
Song, H., Marshall, J., McGillicuddy, D. J., and Seo, H.: Impact of current-wind interaction on vertical processes in the Southern Ocean, J. Geophys. Res.-Oceans, 125, e2020JC016046, https://doi.org/10.1029/2020JC016046, 2020.
Stock, C. A., Pegion, K., Vecchi, G. A., Alexander, M. A., Tommasi, D., Bond, N. A., Fratantoni, P. S., Gudgel, R. G., Kristiansen, T., O'Brien, T. D., Xue, Y., and Yang, X.: Seasonal sea surface temperature anomaly prediction for coastal ecosystems, Prog. Oceanogr., 137, 219–236, https://doi.org/10.1016/j.pocean.2015.06.007, 2015.
Valerio, A. M., Kampel, M., Ward, N. D., Sawakuchi, H. O., Cunha, A. C., and Richey, J. E.: CO2 partial pressure and fluxes in the Amazon River plume using in situ and remote sensing data, Cont. Shelf Res., 215, 104348, https://doi.org/10.1016/J.CSR.2021.104348, 2021.
Wheeler, M. and Kiladis, G. N.: Convectively Coupled Equatorial Waves: Analysis of Clouds and Temperature in the Wavenumber–Frequency Domain, J. Atmos. Sci., 56, 374–399, https://doi.org/10.1175/1520-0469(1999)056<0374:CCEWAO>2.0.CO;2, 1999.
Wright, D. G.: An Equation of State for Use in Ocean Models: Eckart's Formula Revisited, J. Atmos. Ocean. Tech., 14, 735–740, https://doi.org/10.1175/1520-0426(1997)014<0735:AEOSFU>2.0.CO;2, 1997.
Wunsch, C. and Ferrari, R.: Vertical mixing, energy, and the general circulation of the oceans, Annu. Rev. Fluid Mech., 36, 281–314, https://doi.org/10.1146/annurev.fluid.36.050802.122121, 2004.
Zsoter, E., Harrigan, S., Barnard, C., Wetterhall, F., Ferrario, I., Mazzetti, C., Alfieri, L., Salamon, P., and Prudhomme, C.: River discharge and related historical data from the Global Flood Awareness System. v3.1, CEMS Early Warning Data Store [data set], https://doi.org/10.24381/cds.a4fdd6b9, 2021.
Zweng, M., Reagan, J., Seidov, D., Boyer, T., Locarnini, R., Garcia, H., Mishonov, A., Baranova, O., Paver, C., and Smolyar, I.: World Ocean Atlas 2018, Vol. 2: Salinity, A. Mishonov Technical Ed.; NOAA Atlas NESDIS 82, 50 pp., https://doi.org/10.25923/9pgv-1224, 2019.
Short summary
This study investigates the variability of currents in the Southwestern Atlantic Ocean using a high-resolution simulation. Particularly in the Brazil-Malvinas Confluence (BMC), it finds that the southward movement of the BMC, induced by the warming trends in the region, is balanced by northward flow from the Malvinas Current and Pacific Waves. The analysis also examines the intense northward displacement of the North Brazil Current, where inconsistencies in the simulation affect its evolution.
This study investigates the variability of currents in the Southwestern Atlantic Ocean using a...
