Surface Salinity in the North Atlantic Subtropical Gyre During the STRASSE/SPURS Summer 2012 Cruise

Type Article
Date 2015-03
Language English
Author(s) Reverdin Gilles1, Morisset Simon2, Marie Louis3, Bourras Denis4, Sutherland Graigory5, Ward Brian6, Salvador Joaquin7, Font Jordi8, Cuypers Yannis9, Centurioni Luca10, Hormann Verena11, Koldziejczyk Nicolas9, Boutin Jacqueline12, D'Ovidio Francesco9, Nencioli Francesco13, 14, Martin Nicolas9, Diverres Denis15, Alory Gael16, Lumpkin Rick17
Affiliation(s) 1 : Univ Paris 04, LOCEAN, CNRS UPMC IRD MNHN, Res, Paris, France.
2 : LOCEAN IPSL, Paris, France.
3 : UMR 6523 CNRS IFREMER IRD UBO, LPO, Plouzane, France.
4 : Inst Mediterranean Oceanol MIO, Luminy, France.
5 : Univ Oslo, Dept Math, Oslo, Norway.
6 : Natl Univ Ireland Univ Coll Galway, Galway, Ireland.
7 : ICM CSIC, Barcelona, Catalunya, Spain.
8 : Inst Ciencies Mar CMIMA CSIC, Barcelona, Spain.
9 : Univ Paris 04, LOCEAN, CNRS UPMC IRD MNHN, Paris, France.
10 : Univ Calif San Diego, Scripps Inst Oceanog, Global Drifter Program, La Jolla, CA 92093 USA.
11 : Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
12 : Univ Paris 04, LOCEAN, Res, Paris, France.
13 : MIO, Luminy, France.
14 : Plymouth Marine Lab, Plymouth, Devon, England.
15 : IRD, US Instrumentat Moyens Analyt Observ Geophys & Oc, Plouzane, France.
16 : LEGOS, Toulouse, France.
17 : NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA.
Source Oceanography (1042-8275) (Oceanography Soc), 2015-03 , Vol. 28 , N. 1 , P. 114-123
DOI 10.5670/oceanog.2015.09
WOS© Times Cited 17
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.
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Reverdin Gilles, Morisset Simon, Marie Louis, Bourras Denis, Sutherland Graigory, Ward Brian, Salvador Joaquin, Font Jordi, Cuypers Yannis, Centurioni Luca, Hormann Verena, Koldziejczyk Nicolas, Boutin Jacqueline, D'Ovidio Francesco, Nencioli Francesco, Martin Nicolas, Diverres Denis, Alory Gael, Lumpkin Rick (2015). Surface Salinity in the North Atlantic Subtropical Gyre During the STRASSE/SPURS Summer 2012 Cruise. Oceanography, 28(1), 114-123. Publisher's official version : , Open Access version :