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Understanding surface and subsurface temperature changes induced by tropical cyclones in the Kuroshio

机译：了解黑潮中热带气旋引起的地表和地下温度变化

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摘要

Surface and subsurface temperature changes in the Kuroshio induced by tropical cyclones (TCs) were investigated using both 10-year observational datasets (SST maps and Argo data) and temperature budget analysis of idealized numerical simulations. Although Argo data are very limited during a TC's passage, they provided unique in situ measurements at the subsurface of the Kuroshio. Compared to the surface water in the Kuroshio and in the general ocean, the subsurface water of the Kuroshio shows a rapid temperature warming (recovery) after a TC's passage. Budget analysis on the model simulations suggested that the temperature changes at surface Kuroshio are dominated by the wind-induced vertical mixing, while the subsurface temperature changes are primarily dominated by TC-induced Ekman pumping (downwelling-upwelling-downwelling pattern). The Kuroshio subsurface water is warmed up mainly by the downwelling process, and then transported downstream by strong Kuroshio currents. Sensitivity experiments suggested that the recovery time of the subsurface temperature cooling is more sensitive to TC translation speeds and less sensitive to the Kuroshio current velocities.
机译：使用10年观测数据集（SST映射和Argo数据）以及理想数值模拟的温度预算分析，研究了热带气旋（TC）引起的黑潮中地表和地下温度的变化。尽管Argo数据在TC传递过程中非常有限，但它们在黑潮的地下提供了独特的原位测量。与黑潮和一般海洋中的地表水相比，黑潮的地下水在TC传递后显示出快速的温度升高（恢复）。对模型模拟的预算分析表明，黑潮表面的温度变化主要受风引起的垂直混合作用，而地下温度的变化主要受TC引起的埃克曼抽水作用（下降-上升-下降-下降模式）。黑潮地下水主要通过下涌过程而变暖，然后通过黑潮强烈流向下游输送。敏感性实验表明，地下温度冷却的恢复时间对TC转换速度更为敏感，而对黑潮的流速则较不敏感。

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  • 来源
    《Ocean Dynamics》 |2015年第7期|1017-1027|共11页
  • 作者

    Liu Xin; Wei Jun;

  • 作者单位

    Peking Univ, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing 100871, Peoples R China;

    Peking Univ, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing 100871, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Kuroshio; Tropical cyclone; Subsurface water; Argo profiles;

    机译：黑潮;热带气旋;地下水;Argo剖面;

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