FN Archimer Export Format PT J TI Eastward propagating surface salinity anomalies in the tropical North Atlantic BT AF Grodsky, Semyon A. Reul, Nicolas Bentamy, Abderrahim Vandemark, Douglas AS 1:1;2:2;3:2;4:3; FF 1:;2:PDG-ODE-LOPS-SIAM;3:PDG-ODE-LOPS-SIAM;4:; C1 Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, USA Laboratoire d’Océanographie Physique et Spatial (LOPS), Institut Francais Pour la Recherche et l’Exploitation de la Mer, Plouzané, France Ocean Process Analysis Laboratory, University of New Hampshire, Durham, NH, USA C2 UNIV MARYLAND, USA IFREMER, FRANCE UNIV NEW HAMPSHIRE, USA SI TOULON BREST SE PDG-ODE-LOPS-SIAM UM LOPS IN WOS Ifremer UMR copubli-int-hors-europe IF 2.3 TC 1 UR https://archimer.ifremer.fr/doc/00750/86183/91488.pdf LA English DT Article AB Upper ocean variations across the tropical Atlantic are strongly seasonal due to corresponding seasonality in surface forcing and continental runoff. This implies that many features in regional upper ocean state or transport anomalies may also be seasonally locked. In the boreal summer and autumn, remote sensing sea surface salinity (SSS) observations show the presence of eastward propagating anomalies concurrent with the seasonal development of fresh Amazon plume and acceleration of the eastward North Equatorial Countercurrent. Interannual variations in these eastward cross-Atlantic SSS signals are investigated in connection with their forcing by wind and circulation patterns. Satellite data show that these SSS anomalies are advected zonally across the entire Atlantic. It is suggested that they originate due to wind-induced changes in the Amazon plume areal extent, which are notorious in the North Brazil Current retroflection. Satellite SSS is instrumental for exploring such signals because in-situ observations do not always capture them due to the limitation in resolved spatial and temporal scales. PY 2022 PD APR SO Remote Sensing Letters SN 2150-704X PU Informa UK Limited VL 13 IS 4 UT 000751771600001 BP 334 EP 342 DI 10.1080/2150704X.2022.2032452 ID 86183 ER EF