Collapses, Maxima, Multi‐Year Modulation and Trends of the Zapiola Anticyclonic Circulation: Insights From Mercator Reanalysis

The Argentine Basin hosts a unique oceanic feature: the Zapiola Anticyclonic Circulation (ZAC) located above a sedimentary deposit. Taking advantage of a high‐resolution (1/12°) global ocean reanalysis (GLORYS12) we examine the ZAC over 27 years (1993–2019). The mean ZAC is bottom‐intensified with b...

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Veröffentlicht in:	Journal of geophysical research. Oceans 2024-03, Vol.129 (3), p.n/a
Hauptverfasser:	Poli, Lea, Artana, Camila, Provost, Christine, Sirven, Jérôme, Le Blanc‐Pressenda, Ruben
Format:	Artikel
Sprache:	eng
Schlagworte:	Anticyclonic circulation basins Bottom currents Circulation cold Eddy kinetic energy geophysics Hosts Kinetic energy Modulation Ocean currents Ocean, Atmosphere Oceans Salinity Salinity effects Sciences of the Universe Summer circulation time series analysis Trends Volume transport Vortices Water circulation Water column
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Zusammenfassung:	The Argentine Basin hosts a unique oceanic feature: the Zapiola Anticyclonic Circulation (ZAC) located above a sedimentary deposit. Taking advantage of a high‐resolution (1/12°) global ocean reanalysis (GLORYS12) we examine the ZAC over 27 years (1993–2019). The mean ZAC is bottom‐intensified with bottom currents reaching 0.10 ms−1. The ZAC volume transport ranges from −18.5 to 268 Sv with a mean of 122 Sv. The strong negative peaks correspond to occasional ZAC collapses. During large transport events (>195.4 Sv) the ZAC shows a well defined coherent gyre. Strong transport events are associated with high eddy kinetic energy (EKE) at the periphery of the ZAC (especially to the west and south). In contrast, during weak transport events (
ISSN:	2169-9275 2169-9291
DOI:	10.1029/2023JC020269