Temperature inversion in China seas
Temperature inversion in China seas
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DOI：
10.1029/2010jc006297
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发表时间：
2010-12-10
影响因子：
3.6
通讯作者：
Wang, Fan
中科院分区：
文献类型：
--
作者：
Hao, Jiajia;Chen, Yongli;Wang, Fan
根据1930 - 2001年319，029条水文资料，分析了1930 - 2001年10 - 5月中国东南沿海（A区）、朝鲜半岛半岛西部和南部（B区）、山东半岛半岛北部和东部（C区）的逆温现象。结果表明，逆温区的逆温强度和覆盖范围具有明显的时空变异性，A区（约60%）和C区（40%~ 50%）的逆温概率高于B区（15%~ 20%）。分析表明，海气净热通量的季节变化与逆温发生的时间密切相关，表层长江、黄河淡水羽流和次表层海洋咸水维持稳定的层结。蒸发/过量降水通量对维持稳定逆温的贡献不大。在A区和C区，风驱动的沿岸流对表层淡水的平流作用导致逆温的扩展。A区逆温持续时间最长，主要由携带次表层咸水的台湾暖流维持，而B区逆温的演变主要受黄海暖流控制。
Temperature inversion was reported as a common phenomenon in the areas near the southeastern Chinese coast (region A), west and south of the Korean Peninsula (region B), and north and east of the Shandong Peninsula (region C) during October-May in the present study, based on hydrographic data archived from 1930 through 2001 (319,029 profiles). The inversion was found to be remarkable with obvious temporal and spatial variabilities in both magnitude and coverage, with higher probabilities in region A (up to about 60%) and region C (40%-50%) than in region B (15%-20%). The analysis shows that seasonal variation of the net air-sea heat flux is closely related to the occurrence time of the inversion in the three areas, while the Yangtze and Yellow river freshwater plumes in the surface layer and ocean origin saline water in the subsurface layer maintain stable stratification. It seems that the evaporation/excessive precipitation flux makes little contribution to maintaining the stable inversion. Advection of surface fresh water by the wind-driven coastal currents results in the expansion of inversion in regions A and C. The inversion lasts for the longest period in region A (October-May) sustained by the Taiwan Warm Current carrying the subsurface saline water, while evolution of the inversion in region B is mainly controlled by the Yellow Sea Warm Current.