Global analysis of the pressure adjustment mechanism over sea surface temperature fronts using AIRS/Aqua data
Global analysis of the pressure adjustment mechanism over sea surface temperature fronts using AIRS/Aqua data
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DOI：
10.1029/2010gl046625
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发表时间：
2011-03
影响因子：
5.2
通讯作者：
T. Shimada;S. Minobe
中科院分区：
文献类型：
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作者：
T. Shimada;S. Minobe
利用全球卫星探空和散射计观测资料，研究了主要海表温度（SST）锋面区域表面风辐合/辐散的大气压力调节机制特征。分析了对流层低层空气厚度，其中包括由海洋大气边界层中的气温修正的海平面气压分量，并检验了厚度的拉普拉斯算子与风辐合之间的关系。在中纬度的四个SST锋区中，墨西哥湾流的拉普拉斯厚度和风辐合之间的相关性最大，其次是Agulhas回流和巴西/马尔维纳斯海流，黑潮-Oyashio延伸区相对较小，但仍然显着。这些相关性强有力地表明，压力调节机制普遍在全球SST锋区的海气相互作用中起着重要作用。此外，即使在对流层中部，前两个区域的气温也表现出SST相关的特征。
We investigate the signatures of atmospheric pressure adjustment mechanism for surface wind convergence/divergence over major sea surface temperature (SST) frontal regions using global observations of satellite sounding and scatterometer. Lower tropospheric air thickness, which includes a sea‐level pressure component modified by air temperature in the marine atmospheric boundary layer, is analyzed, and the relation between the Laplacian of the thickness and wind convergence are examined. Among four SST frontal regions in mid‐latitudes, correlation between the thickness Laplacian and wind convergence is the largest over the Gulf Stream followed by those for the Agulhas Return Current and for the Brazil/Malvinas Current, and relatively small but still significant over the Kuroshio‐Oyashio Extension. These correlations strongly suggest that the pressure adjustment mechanism ubiquitously plays an important role in air‐sea interaction over the global SST frontal regions. Furthermore, air temperatures in the first two regions exhibit SST‐relating signatures even in the mid‐troposphere.