ENSO Modulates Mean Currents and Mesoscale Eddies in the Caribbean Sea

被引:2
|
作者
Huang M. [1 ]
Liang X. [1 ]
Yang Y. [2 ]
Zhang Y. [1 ]
机构
[1] School of Marine Science and Policy, University of Delaware, Lewes, DE
[2] State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen
基金
美国国家科学基金会;
关键词
ENSO; instabilities; mesoscale eddy; teleconnection;
D O I
10.1029/2023GL103958
中图分类号
学科分类号
摘要
Although El Niño-Southern Oscillation (ENSO) and its global impacts through teleconnection have been known for decades, if and how the mean currents and mesoscale eddies in the Caribbean Sea are linked to ENSO remains an open question. Here, by analyzing satellite observations and an ocean reanalysis product, we found a close connection between mean currents, eddies in the Caribbean Sea and ENSO on interannual timescales. Strong El Niño events result in enhanced north-south sea surface height differences and consequently stronger mean currents in the Caribbean Sea, and the opposite happens during La Niña events. The eddy kinetic energy responds to ENSO via eddy-mean flow interaction, primarily through baroclinic instability, which releases the available potential energy stored in the mean currents to mesoscale eddies. Our results suggest some predictability of the mean currents and eddies in the Caribbean Sea, particularly during strong El Niño and La Niña events. © 2023. The Authors.
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