Signature of mesoscale eddies in satellite sea surface salinity data

被引：52
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
收藏
页码：1416 / 1424
页数：9
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