Kolodziejczyk N. auteur aut IRD Reverdin G. auteur aut IRD Gaillard F. auteur aut IRD Lazar Alban auteur aut IRD text journalArticle eng text/pdf born digital access Low-frequency variability of spiciness is observed in the Subtropical South Atlantic over the period 2002-2013 with the Argo gridded product In Situ Analysis System. Within the pycnocline, spiciness anomalies propagate at a mean speed of 0.04 +/- 0.02 m s(-1), the same speed as the gyre mean circulation, from the Agulhas Retroflection region off South Africa (similar to 35 degrees S-20 degrees E) toward the South American coast (similar to 18 degrees S-35 degrees W). After 2010, propagation is still found, but stationary local spiciness generation is also found over the Subtropical South Atlantic. This spiciness increase is associated with high values of vertical Turner angle below the mixed layer base during late winter. This suggests spice injection resulting from penetrative convective mixing due to air-sea buoyancy loss. These features may have an impact on the low-frequency warm and salty signal produced by the Agulhas leakage in Subtropical South Atlantic and the upper branch of the Atlantic Meridional Overturning Circulation. specialized ATLANTIQUE SUD 032 41 18 6468-6475 2014 0094-8276 https://www.documentation.ird.fr/hor/fdi:010062717 10.1002/2014gl061160 0094-8276 [F B010062717] https://www.documentation.ird.fr/hor/fdi:010062717 https://www.documentation.ird.fr/intranet/publi/2014/12/010062717.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-01-12 2017-08-23 fdi:010062717 fre