Signature of mesoscale eddies in satellite sea surface salinity data

被引：48

作者：

Melnichenko, Oleg ^{[1
]}

Amores, Angel ^{[1
]}

Maximenko, Nikolai ^{[1
]}

Hacker, Peter ^{[2
]}

Potemra, James ^{[2
]}

机构：

[1] Univ Hawaii, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USA

[2] Univ Hawaii, Sch Ocean & Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS | 2017年 / 122卷 / 02期

关键词：

NORTH-ATLANTIC; OCEAN CIRCULATION; TEMPERATURE; INTERPOLATION; FLUXES; WINDS;

D O I：

10.1002/2016JC012420

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

A persistent signature of coherent mesoscale eddies in sea surface salinity (SSS) is revealed by analyzing the relationship between satellite SSS and sea surface height (SSH) variability in an eddy-following reference frame. Our analysis focuses on mid-ocean eddies in two representative regions, the southern Indian Ocean and the North Atlantic subtropical gyre. The resulting composite averages reveal a clear signature of mesoscale eddies in satellite SSS with typical SSS anomalies of 0.03-0.05 psu. The spatial structure of eddy-induced SSS perturbations can be characterized as a superposition of a dipole structure, arising from horizontal advection of the background SSS gradient by eddy velocity field, and a monopole structure related to the eddy core. The observed relationships between SSS and SSH anomalies are used to provide a regional assessment of the role of mesoscale eddies in the ocean freshwater transport in the North Atlantic subtropical gyre.

引用

页码：1416 / 1424

页数：9

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