Surface salinity in the North Atlantic subtropical gyre during the STRASSE/SPURS Summer 2012 cruise

TitleSurface salinity in the North Atlantic subtropical gyre during the STRASSE/SPURS Summer 2012 cruise
Publication TypeJournal Article
Year of Publication2015
AuthorsReverdin G., Morisset S., Marie L., Bourras D., Sutherland G., Ward B., Salvador J., Font J., Cuypers Y., Centurioni L, Hormann V., Koldziejczyk N., Boutin J., D'Ovidio F., Nencioli F., Martin N., Diverres D., Alory G., Lumpkin R
JournalOceanography
Volume28
Pagination114-123
Date Published2015/03
Type of ArticleArticle
ISBN Number1042-8275
Accession NumberWOS:000353726500012
Keywordsair-sea interaction; evaporation; fluxes; ocean fronts
Abstract

We investigated a 100 x 100 km high-salinity region of the North Atlantic subtropical gyre during the Sub-Tropical Atlantic Surface Salinity Experiment/Salinity Processes in the Upper-ocean Regional Study (STRASSE/SPURS) cruise from August 21, 2012, to September 9, 2012. Results showed great variability in sea surface salinity (SSS; over 0.3 psu) in the mesoscale, over 7 cm of total evaporation, and little diapycnal mixing below 36 m depth, the deepest mixed layers encountered. Strong currents in the southwestern part of the domain, and the penetration of freshwater, suggest that advection contributed greatly to salinity evolution. However, it was further observed that a smaller cyclonic structure tucked between the high SSS band and the strongest currents contributed to the transport of high SSS water along a narrow front. Cross-frontal transport by mixing is also a possible cause of summertime reduction of SSS. The observed structure was also responsible for significant southward salt transport over more than 200 km.

DOI10.5670/oceanog.2015.09
Short TitleOceanography
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