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Importance of the Equatorial Undercurrent on the Sea Surface Salinity in the Eastern Equatorial Atlantic in boreal spring ArchiMer
Da-allada, Casimir Yelognisse; Jouanno, J.; Gaillard, Fabienne; Kolodziejczyk, Nicolas; Maes, C.; Reul, Nicolas; Bourles, B..
The physical processes implied in the sea surface salinity (SSS) increase in the equatorial Atlantic Cold Tongue (ACT) region during boreal spring and the lag observed between boreal spring SSS maximum and sea surface temperature (SST) summer minimum are examined using mixed-layer salinity budgets computed from observations and model during the period 2010-2012. The boreal spring SSS maximum is mainly explained by an upward flux of high salinity originating from the core of the Equatorial Undercurrent (EUC) through vertical mixing and advection. The vertical mixing contribution to the mixed-layer salt budget peaks in April-May. It is controlled primarily by i) an increased zonal shear between the surface South Equatorial Current and the subsurface EUC and...
Tipo: Text Palavras-chave: Atlantic Cold Tongue; SMOS SSS; Model; EUC salinity maximum; Vertical processes.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00363/47396/47388.pdf
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Large-scale overview of the summer monsoon over West Africa during the AMMA field experiment in 2006 ArchiMer
Janicot, S.; Thorncroft, C. D.; Ali, A.; Asencio, N.; Berry, G.; Bock, O.; Bourles, B.; Caniaux, G.; Chauvin, F.; Deme, A.; Kergoat, L.; Lafore, J.-p.; Lavaysse, C.; Lebel, T.; Marticorena, B.; Mounier, F.; Nedelec, P.; Redelsperger, J.-l.; Ravegnani, F.; Reeves, C. E.; Roca, R.; De Rosnay, P.; Schlager, H.; Sultan, B.; Tomasini, M.; Ulanovsky, A..
The AMMA (African Monsoon Multidisciplinary Analysis) program is dedicated to providing a better understanding of the West African monsoon and its influence on the physical, chemical and biological environment regionally and globally, as well as relating variability of this monsoon system to issues of health, water resources, food security and demography for West African nations. Within this framework, an intensive field campaign took place during the summer of 2006 to better document specific processes and weather systems at various key stages of this monsoon season. This campaign was embedded within a longer observation period that documented the annual cycle of surface and atmospheric conditions between 2005 and 2007. The present paper provides a large...
Tipo: Text Palavras-chave: Meteorology and atmospheric dynamics; Climatology; Precipitation; Tropical meteorology.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00203/31457/29861.pdf
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