Malvinas Current at 40°S–41°S: First Assessment of Temperature and Salinity Temporal Variability
The temporal variability of 11 months of in situ velocity, temperature, and salinity data collected at five moorings deployed at 40°S–41°S across the shelf-break in the Southwestern Atlantic is analyzed. Two distinct regimes characterized by strong and weak along-slope velocities are present. During...
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| Lenguaje: | Inglés |
| Publicado: |
Blackwell Publishing Ltd
2018
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 13057caa a22010097a 4500 | ||
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| 001 | PAPER-25130 | ||
| 003 | AR-BaUEN | ||
| 005 | 20250217110847.0 | ||
| 008 | 190410s2018 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85052660807 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Paniagua, G.F. | |
| 245 | 1 | 0 | |a Malvinas Current at 40°S–41°S: First Assessment of Temperature and Salinity Temporal Variability |
| 260 | |b Blackwell Publishing Ltd |c 2018 | ||
| 270 | 1 | 0 | |m Paniagua, G.F.; Centro de Investigaciones del Mar y la Atmósfera (CIMA/CONICET-UBA)Argentina; email: guillermina.paniagua@cima.fcen.uba.ar |
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| 504 | |a Provost, C., Lanoiselle, J., Kartavtseff, A., Spadone, A., Artana, C., Durand, I., (2017), www.seanoe.org, Malvinas Current 2001–2003 Mooring velocities, SEANOE. Retrieved from; Provost, C., Lanoiselle, J., Kartavtseff, A., Vivier, F., Artana, C., Durand, I., (2017), www.seanoe.org, Malvinas Current 1993–1995 Mooring velocities, SEANOE. Retrieved from; Romero, S.I., Piola, A.R., Charo, M., Garcia, C.A.E., Chlorophyll-a variability off Patagonia based on SeaWiFS data (2006) Journal of Geophysical Research, 111. , https://doi.org/10.1029/2005JC003244, C05021 | ||
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| 504 | |a Vivier, F., Provost, C., Direct velocity measurements in the Malvinas Current (1999) Journal of Geophysical Research, 104, pp. 21083-21104 | ||
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| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a The temporal variability of 11 months of in situ velocity, temperature, and salinity data collected at five moorings deployed at 40°S–41°S across the shelf-break in the Southwestern Atlantic is analyzed. Two distinct regimes characterized by strong and weak along-slope velocities are present. During the strong regime the Malvinas Current flows northward through the moorings while during the nearly 5 months long weak regime reversals of the along-slope velocities are frequently observed. Comparison with the previous in situ time series obtained in the same region shows that such an extended period of weak flow has not been previously observed. During the weak regime, Sub-Antarctic Mode Water is observed over the 1,800 m isobath at an average depth of 500 m. Water masses occupying the upper 1,600 m during the strong regime deepen and shift eastward during the weak period. Satellite geostrophic velocities and sea surface temperature clearly show that the weak regime is due to a deflection to the east of the Malvinas Current, upstream of the mooring position. Analysis of the vertical structure of the currents indicate that during the weak regime the flow weakens mostly at the surface and presents a very small vertical shear. In contrast, during the strong regime currents are surface-intensified. The change in the structure of the currents at the mooring location impacts the relationship between in situ and altimetry-derived currents: during the weak regime altimetry adequately represents (rmsd 12 cm/s) in situ currents in the whole water column, while during strong regime rmsd are larger than 15 cm/s below 600 m depth. ©2018. American Geophysical Union. All Rights Reserved. |l eng | |
| 536 | |a Detalles de la financiación: 6Laboratoire | ||
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires, 2Departamento | ||
| 536 | |a Detalles de la financiación: National Science Foundation, CTM2011–28867, GEO-1128040 | ||
| 536 | |a Detalles de la financiación: Inter-American Institute for Global Change Research | ||
| 536 | |a Detalles de la financiación: 1Centro de Investigaciones del Mar y la Atmósfera (CIMA/CONICET-UBA), Ciudad Autónoma de Buenos Aires, Argentina, 2Departamento de Ciencias de la Atmósfera y los Océanos FCEN Universidad de Buenos Aires, Buenos Aires, Argentina, 3Unidad Mixta Internacional-Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (UMI-IFAECI/CNRS-CONICET-UBA), Buenos Aires, Argentina, 4Departamento de Oceanografía, Naval, de Servicio Hidrografía (SHN), Buenos Aires, Argentina, 5Instituto Nacional de Investigación y Desarrollo Pesquero, Mar del Plata, Argentina, 6Laboratoire d’Océanographie et du Climat: Experimentation et Approches Numériques (LOCEAN) UMR 7159, Paris, Francia | ||
| 536 | |a Detalles de la financiación: A large number of people helped collecting the in situ data that are the core of the results presented here. We particularly thank the support of the following institutions: SHN, Mincyt, INIDEP, CONICET, UBA, Prefectura Naval Argentina, Puerto Deseado crew, CNRS, Sorbonne Université LOCEAN, LOPS, and DT-INSU. This study is a contribution to EUMETSAT/CNES DSP/ OT/07-2118 and DSP/OT/07-4571, CONICET-FYPF PIO 133-20130100242. Additional support was provided by grant CRN3070 from the Inter-American Institute for Global Change Research through NSF grant GEO-1128040. We acknowledge support from the MINCYT-ECOS-Sud A14U0 project in facilitating scientific exchanges between Argentina and France. Data from R/V Hespérides were collected in the framework of cruise TIC-MOC, as part of the project CTM2011–28867 funded by the Spanish government. G.F.P. and L.S.L. benefited from scholarships from CONICET, Argentina. The satellite data are available at Copernicus Marine Environment monitoring service (CMEMS) (http://marine.copernicus.eu/) and the in situ data are available at SEANOE (www.seanoe.org cf. references below Provost et al., 2017a, 2017b; Saraceno et al., 2017) and at the NOAA’s National Centers for Environmental Information World Ocean Database 2013 (http://www.nodc.noaa.gov cf. references below Boyer et al., 2013). | ||
| 593 | |a Centro de Investigaciones del Mar y la Atmósfera (CIMA/CONICET-UBA), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 593 | |a Departamento de Ciencias de la Atmósfera y los Océanos FCEN Universidad de Buenos Aires, Buenos Aires, Argentina | ||
| 593 | |a Unidad Mixta Internacional-Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (UMI-IFAECI/CNRS-CONICET-UBA), Buenos Aires, Argentina | ||
| 593 | |a Departamento de Oceanografía, Naval, de Servicio Hidrografía (SHN), Buenos Aires, Argentina | ||
| 593 | |a Instituto Nacional de Investigación y Desarrollo Pesquero, Mar del Plata, Argentina | ||
| 593 | |a Laboratoire d'Océanographie et du Climat: Experimentation et Approches Numériques (LOCEAN) UMR 7159, Paris, France | ||
| 690 | 1 | 0 | |a MALVINAS CURRENT |
| 690 | 1 | 0 | |a MOORINGS |
| 690 | 1 | 0 | |a SALINITY |
| 690 | 1 | 0 | |a TEMPERATURE |
| 690 | 1 | 0 | |a TIME SERIES |
| 690 | 1 | 0 | |a ASSESSMENT METHOD |
| 690 | 1 | 0 | |a COMPARATIVE STUDY |
| 690 | 1 | 0 | |a MODE WATER |
| 690 | 1 | 0 | |a MOORING SYSTEM |
| 690 | 1 | 0 | |a SALINITY |
| 690 | 1 | 0 | |a SEA SURFACE TEMPERATURE |
| 690 | 1 | 0 | |a SHELF BREAK |
| 690 | 1 | 0 | |a TEMPORAL VARIATION |
| 690 | 1 | 0 | |a TIME SERIES ANALYSIS |
| 690 | 1 | 0 | |a WATER MASS |
| 690 | 1 | 0 | |a ATLANTIC OCEAN |
| 690 | 1 | 0 | |a ATLANTIC OCEAN (SOUTHWEST) |
| 690 | 1 | 0 | |a MALVINAS CURRENT |
| 700 | 1 | |a Saraceno, Martín | |
| 700 | 1 | |a Piola, A.R. | |
| 700 | 1 | |a Guerrero, R. | |
| 700 | 1 | |a Provost, C. | |
| 700 | 1 | |a Ferrari, R. | |
| 700 | 1 | |a Lago, L.S. | |
| 700 | 1 | |a Artana, C.I. | |
| 773 | 0 | |d Blackwell Publishing Ltd, 2018 |g v. 123 |h pp. 5323-5340 |k n. 8 |p J. Geophys. Res. Oceans |x 21699275 |w (AR-BaUEN)CENRE-412 |t Journal of Geophysical Research: Oceans | |
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