| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Variations in the Malvinas Current volume transport since October 1992
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| Autores: |
Spadone, Aurelie
Provost, Christine
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| Data: |
2009-02
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| Ano: |
2009
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| Palavras-chave: |
Malvinas Current
Transport
Interannual variations
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| Resumo: |
We present a set of new current meter measurements collected to monitor the Malvinas Current ( MC) near its merger with the Brazil Current at 40-41 degrees S from December 2001 to February 2003 below a Jason-1 altimeter track. These measurements are compared to former measurements obtained 8 years earlier at the same location; they also provide new information on the core of the MC on the continental slope above the 1000-m isobath where a mooring had been previously lost. There, most of the velocity variation is along-isobath (80% of the variance) and shows a significant annual cycle. The two data sets provide coherent means and statistical parameters on the vertical structure of the flow. A 14-year-long time series of MC volume transport is derived using satellite altimetry. The good correlation between the altimetry-derived transport and the transport estimated from the current meter data persists in time (over 0.7 for each measurement period). A spectacular shift in the spectral composition of transport variations was observed: from 1992 until the end of 1997 transport variations occurred at rather short periods (50-90 days and to some degree around 180 days) whereas, after year 2000, longer periods including a seasonal cycle predominated. Altimetry-derived anomalies of surface geostrophic velocities along the core of the MC show a similar shift in spectral composition suggesting a remote-forcing origin.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00481/59316/62073.pdf
https://archimer.ifremer.fr/doc/00481/59316/62074.txt
https://archimer.ifremer.fr/doc/00481/59316/62075.txt
DOI:10.1029/2008JC004882
https://archimer.ifremer.fr/doc/00481/59316/
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| Editor: |
Amer Geophysical Union
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| Formato: |
application/pdf
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| Fonte: |
Journal Of Geophysical Research-oceans (0148-0227) (Amer Geophysical Union), 2009-02 , Vol. 114 , N. C02002 , P. 21p.-
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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