台风影响南海上层环流的统计分析研究  

Influence of typhoons on the upper-layer circulation in the South China Sea

作　　者：王银霞[1,2] 隋俊鹏[3] 曾纪胜 孙玉超[1] 田松 李子牛 王兆宇 WANG Yin-xia;SUI Jun-peng;ZENG Ji-sheng;SUN Yu-chao;TIAN Song;LI Zi-niu;WANG Zhao-yu(South China Sea Institute of Planning and Environmental Research,State Oceanic Administration,Guangzhou 510300 China;Key Laboratory of Technology and Application for Safeguarding of Marine Rights and Interests,State Oceanic Administration,Guangzhou 510300 China;National Marine Environmental Forecasting Center,Beijing 100081 China;Marine Monitoring and Early Warning Center of Liaoning,Dalian 110001 China)

机构地区：[1]国家海洋局南海规划与环境研究院,广东广州510300 [2]国家海洋局南海维权技术与应用重点实验室,广东广州510300 [3]国家海洋环境预报中心,北京100081 [4]辽宁省海洋预警监测中心,辽宁大连110001

出　　处：《海洋预报》2020年第4期15-20,共6页Marine Forecasts

基　　金：国家海洋局南海维权技术与应用重点实验室开发基金(SCS1616、SCS1501)。

摘　　要：利用温州台风网台风信息以及卫星遥感海表风场数据,研究了南海上层环流对台风的响应特征。合成分析发现,台风以Ekman输运的形式,能够诱发上层海洋十几厘米每秒的流速变化,并且主要集中在南海东部海盆。虽然台风引起的上层环流异常比较小,但是其方差非常显著。另一方面台风通过Ekman抽吸,引发上层海洋垂向运动异常,并且能够诱发强烈的等效混合。基于历史温盐数据发现,这种强的等效混合主要分布在吕宋海峡以西、越南以东以及台湾海峡,并且能够达到10^-3 m^2/s的量级。Based on the typhoon information from Wenzhou Typhoon Network and remote sensing sea surface wind data,this paper studies the response of upper-layer circulation to typhoon in the South China Sea(SCS).There are two main pathways that typhoon influences the upper layer ocean circulation.Ekman transport induces the change of upper-layer ocean velocity by about 10 cm/s,which mainly locates at the eastern SCS basin.Although the composite of the SCS upper-layer circulation anomaly induced by typhoon is small,the variance is significant.The other pathway is Ekman pumping,which induces vertical movement anomaly and strong mixing in the upper layer of the SCS.The strong mixing mainly occurs in the west of Luzon Strait,east of Vietnam and Taiwan Strait,which can reach the order of 10^-3 m^2/s.

关 键 词：台风 南海 上层环流 EKMAN抽吸 混合 

分 类 号：P444[天文地球—大气科学及气象学]