Intraseasonal SST Variability and Air–Sea Interaction over the Kuroshio Extension Region during Boreal Summer*
Intraseasonal SST Variability and Air–Sea Interaction over the Kuroshio Extension Region during Boreal Summer*
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DOI：
10.1175/jcli-d-11-00109.1
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发表时间：
2012-03
影响因子：
4.9
通讯作者：
Lu Wang;Tim Li;Tianjun Zhou
中科院分区：
文献类型：
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作者：
Lu Wang;Tim Li;Tianjun Zhou
利用卫星逐日海温资料、降水观测资料和再分析资料，研究了夏季黑潮延伸区海表温度（SST）及相关大气和海洋环流的季节内（20-100天）变化结构和演变特征。在KE地区的季节内SST变暖与异常反气旋在上覆大气，降水减少，并在海洋上层的北上和向下的电流。在SST冷却阶段，相应的大气场和海洋场呈现相反符号的镜像。混合层热量收支分析表明，季节内SST增暖的主要原因是短波辐射和地面潜热通量的异常。感热通量和海洋平流的异常也有贡献，但幅度要小得多，大气强迫引起的海温增暖对海温的变化有进一步的指示作用。
AbstractThe structure and evolution characteristics of intraseasonal (20–100 day) variations of sea surface temperature (SST) and associated atmospheric and oceanic circulations over the Kuroshio Extension (KE) region during boreal summer are investigated, using satellite-based daily SST, observed precipitation data, and reanalysis data. The intraseasonal SST warming in the KE region is associated with an anomalous anticyclone in the overlying atmosphere, reduced precipitation, and northward and downward currents in the upper ocean. The corresponding atmospheric and oceanic fields during the SST cooling phase exhibit a mirror image with an opposite sign. A mixed layer heat budget analysis shows that the intraseasonal SST warming is primarily attributed to anomalous shortwave radiation and latent heat fluxes at the surface. The anomalous sensible heat flux and oceanic advection also have contributions, but with a much smaller magnitude.The SST warming caused by the atmospheric forcing further exerts a sign...