台风对江苏近海海表温度的影响分析与探讨

Analysis of impacts of typhoons on sea surface temperature of coastal region of Jiangsu Province

利用中国台风网"CMA-STI热带气旋最佳路径资料数据"和多卫星遥感观测资料,本文对2011年09号梅花台风、2011年06号马鞍台风和2012年10号达维台风在发展过程对中国江苏近海海域海温的影响进行了分析与探讨,并辅助以沿岸的海温实测资料进行对比验证,借此提高对近海海域上层海洋物理环境对台风响应的认识。分析结果表明,台风对近海SST的影响程度与台风自身强度和台风的移动路径密切相关,近海SST降低区域一般位于台风路径的右侧,最大SST降低一般滞后台风中心两天或一天。当台风在远海活动并靠近江苏近海时,江苏近海海域SST略有上升;当台风进入江苏近海时,近海海域SST大幅降低;登陆台风在登陆后近海才出现最大降温。

Based on ＂CMA-STI optimal tracks for Tropical Cyclones data＂ and Multi-satellite remote sens- ing data, the changes of sea surface temperature （SST） in coastal region of Jiangsu Province with the typhoons moving were analyzed and compared in basis of the observation SST data of the ocean station offshore Jiangsu Province. The analysis indicated that the changes of SST are closed related to the intensity and movement speed of typhoons. The analysis also showed that the SST decrease area commonly appears in the right side of the track of typhoons. The largest decrease of SST usually appeared in the right part of original typhoon center when the typhoon center passed one or two days later. When typhoon appeared in the ocean and moved toward coastal re- gion of Jiangsu Province, coastal SST of Jiangsu Province wouldriseslightly. When the typhoon appeared in the coastal region of Jiangsu Province, coastal SST of Jiangsu Province would decrease obviously, The largest de- crease of SST appeared in the coastal region after the typhoon landed.