Satellite evidence of wintertime atmospheric boundary layer responses to multiple SST fronts in the Japan Sea
Satellite evidence of wintertime atmospheric boundary layer responses to multiple SST fronts in the Japan Sea
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DOI：
10.1029/2008gl035810
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发表时间：
2008-12
影响因子：
5.2
通讯作者：
T. Shimada;H. Kawamura
中科院分区：
文献类型：
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作者：
T. Shimada;H. Kawamura
我们提出了2005年12月22日至28日在日本海冷空气爆发下冬季大气边界层对多个海表温度（SST）锋响应的卫星证据。结果表明，低层大气与SST的阶梯式变化相一致，主要表现为一条从欧亚大陆到日本北方的风轨迹，该风轨迹经过曲折的极锋和对马暖流。风速距平与海温距平呈线性相关，风场辐散与下风向海温梯度呈线性相关。当到达极锋和对马暖流时，垂直均匀的潜在温度层就完成了。水汽混合比的变化和由此产生的地面湍流热通量也呈现出逐步增加的趋势。日本海岸的风垂直切变很小，表明最终形成了混合良好的边界层。
We present satellite evidence of wintertime atmospheric boundary layer responses to multiple sea surface temperature (SST) fronts in the Japan Sea under cold‐air outbreak during 22–28 December 2005. It is found that the lower atmosphere adheres to the stepwise SST variations, focusing on a wind trajectory from the Eurasian continent to the northern Japan, which goes through the meandering Polar Front and the Tsushima Warm Current. Wind speed anomaly and wind divergence are linearly related to the SST anomaly and downwind SST gradient, respectively. Vertically uniform layers of potential temperature are accomplished when reaching the Polar Front and Tsushima Warm Current. Variations of water vapor mixing ratio and the resulting surface turbulent heat fluxes show also stepwise increases. Little wind vertical shear on the Japanese coast suggests that well‐mixed boundary layer is eventually formed.