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Study of Mesoscale Eddies Affecting Wind Power Input in the Kuroshio Extension Region
编号：145 访问权限：仅限参会人 更新：2026-08-31 14:27:54 浏览：0次 口头报告

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摘要
Wind stress at the sea surface is the main mechanical energy source for large‐scale ocean
circulation. Quantifying this energy transfer—Wind Power Input (wind power input [WPI])—depends strongly
on whether wind stress is based on absolute winds or on relative winds that account for the difference between
wind and surface current. Ignoring the surface current causes a large bias: WPI is overestimated by ∼58% within
mesoscale eddies in the Kuroshio Extension (KE), far higher than the regional mean bias of 17%–35% reported
earlier. Relative wind stress has traditionally been considered to be related to a so‐called “eddy killer” effect,
that is, the wind usually weakens the kinetic energy of mesoscale eddies; however, recent studies indicate that
winds can also enhance eddy development. Based on a coupled air‐sea data set of 6,670 eddies derived from
satellite and reanalysis data (1993–2018), we analyzed eddy lifecycles to evaluate wind‐eddy interactions. The
results indicate that anticyclonic eddies generally receive more wind energy than cyclonic eddies, with input
strongest in winter and weakest in summer. Notably, WPI exhibits a distinct lifecycle dependence: energy input
peaks during the generation stage, declines rapidly during maturity, and remains weak during decay while
retaining its initial sign. This pattern indicates that early wind‐eddy coupling exerts a persistent influence,
followed by a negative feedback in which initial energy input strengthens eddies, but subsequent sea surface
temperature and heat flux changes weaken local winds, promoting decay. These findings improve our
understanding of wind‐eddy energetics in the KE region and offer refined approaches for estimating wind
energy input, with important implications for climate model parameterizations.
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报告人
Jinlin Ji
Dcotor Nanjing University of Information Science and Technology

稿件作者
Jinlin Ji Nanjing University of Information Science and Technology
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重要日期

  • 会议日期

    01月12日

    2027

    至

    01月15日

    2027

  • 07月21日 2026

    初稿截稿日期

  • 01月15日 2027

    注册截止日期

主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University (MEL)
Department of Earth Sciences, National Natural Science Foundation of China (NSFC)
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