首页|Seasonal variation of mesoscale eddy intensity in the global ocean

Seasonal variation of mesoscale eddy intensity in the global ocean

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  • 万方数据
  • 维普
Mesoscale eddies are a prominent oceanic phenomenon that plays an important role in oceanic mass transport and energy conversion.Characterizing by rotational speed,the eddy intensity is one of the most fundamental properties of an eddy.However,the seasonal spatiotemporal variation in eddy intensity has not been examined from a global ocean perspective.In this study,we unveil the seasonal spatiotemporal characteristics of eddy intensity in the global ocean by using the latest satellite-altimetry-derived eddy trajectory data set.The results suggest that the eddy intensity has a distinct seasonal variation,reaching a peak in spring while attaining a minimum in autumn in the Northern Hemisphere and the opposite in the Southern Hemisphere.The seasonal variation of eddy intensity is more intense in the tropical-subtropical transition zones within latitudinal bands between 15° and 30° in the western Pacific Ocean,the northwestern Atlantic Ocean,and the eastern Indian Ocean because baroclinic instability in these areas changes sharply.Further analysis found that the seasonal variation of baroclinic instability precedes the eddy intensity by a phase of 2-3 months due to the initial perturbations needing time to grow into mesoscale eddies.

seasonal variationmesoscale eddyintensitybaroclinic instabilityglobal ocean

Yongcan Zu、Yue Fang、Shuangwen Sun、Libao Gao、Yang Yang、Guijun Guo

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First Institute of Oceanography/Key Laboratory of Marine Science and Numerical Modeling,Ministry of Natural Resources,Qingdao 266061,China

Laboratory for Regional Oceanography and Numerical Modeling,Laoshan Laboratory,Qingdao 266237,China

Shandong Key Laboratory of Marine Science and Numerical Modeling,Qingdao 266061,China

National Key R&D Program of ChinaBasic Scientific Fund for National Public Research Institutes of ChinaBasic Scientific Fund for National Public Research Institutes of ChinaBasic Scientific Fund for National Public Research Institutes of ChinaMarine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(Qingdao)National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of Chinaprogram Impact and Response of Antarctic Seas to Climate ChangeTaishan Scholars Project Fund

2022YFC28076042022S022022Q032018S022018SDKJ0105-3418760304197602141876231419006043241706220IRASCC 01-01-01Ats20190963

2024

10.1007/s13131-023-2278-3

海洋学报(英文版)
中国海洋学会

海洋学报(英文版)

CSTPCD
影响因子：0.323
ISSN：0253-505X
年,卷(期)：2024.43(1)
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