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西北太平洋超强台风Tembin(2012)引起的海表面降温与强混合研究
管守德1, 侯一筠2
1.中国海洋大学 物理海洋教育部重点实验室;2.中国科学院海洋研究所
摘要:
鉴于台风等极端海洋环境下现场观测资料的匮乏,本文综合了多源卫星遥感和Argo浮标剖面观测资料分析了西北太平洋和南海上层海洋对超强台风Tembin(2012)的响应。Tembin引起了较强的海表面温度降低,降温主要集中在台风路径附近,最大降温为10.3 °C,出现在朝鲜半岛南部的近岸海区;微波+红外遥感融合观测海表面温度数据可以弥补单一微波遥感数据在近岸海区缺测的不足,但观测海表面降温比单一微波遥感观测偏小;基于Argo观测的垂向高分辨率温盐剖面和混合参数化方法,发现台风后上层海洋混合明显增强,其混合率增强可达10倍以上。
关键词:  超强台风Tembin  海表面温度  微波遥感海表面温度数据  微波+红外融合遥感海表面温度数据  Argo浮标  混合率
DOI:10.11693/hyhz20191200276
分类号:P733
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
SUPER TYPHOON TEMBIN (2012) INDUCED SEA SURFACE COOLING AND ENHANCED DIAPYCNAL MIXING IN THE NORTHWEST PACIFIC OCEAN
Guan Shoude1, Hou Yijun2
1.Physical Oceanography Lab/IAOS, Ocean University of China;2.Key Laboratory of Ocean circulation and waves, Institute of Oceanology, Chinese Academy of Sciences
Abstract:
Due to lack of field observations under typhoon conditions, the upper ocean response to super typhoon Tembin (2012) was examined in the Western North Pacific and South China Sea, using remote sensing sea surface information from multiplatform satellites and upper ocean temperature and salinity profiles observed by Argo floats. Significant Sea Surface Temperature (SST) drop was induced by the super typhoon Tembin and was mainly located along the track of Tembin with a maximum drop up to 10.3 °C, occurred in oceans south of the Korea peninsula. Compared to the MW OI SST product, MW+IR OI SST product captured the dramatic SST cooling in coastal waters, but underestimated the typhoon induced SST cooling along typhoon track. Based on the temperature and salinity profiles with high vertical resolution by Argo floats and fine-scale parameterization method, the diapycnal diffusivity before and after typhoon was estimated. It was found that the diapycnal diffusivity was significantly enhanced up to more than10 times after typhoon.
Key words:  super typhoon Tembin  sea surface temperature  MW OI SST  MW+IR OI SST  Argo floats  diapycnal diffusivity
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