The Impact of Typhoons on Sea Surface Temperature in the Western North Pacific Ocean

The response of the sea surface temperature(SST) to typhoons in the Western North Pacific Ocean was investigated using data from typhoon yearbook,NCEP and Remote Sensing Systems(RSS).Six typhoon factors and four SST factors were chosen to study the response.The results suggest that the influence of typhoons on the SST depends on the intensity of the typhoon.Among all the correlation coefficients between the SST and typhoon factors,the correlation coefficients between SST decrease and air pressure gradient and pressure difference were found to be the largest,while the correlation coefficient between SST decrease and typhoon translationspeed was found to be the smallest.As the sea surface cooling is also highly related to the upper ocean condition,the relationship between the upper ocean structure and sea surface cooling was discussed and the results indicate that the response decreased with the increase of water depth in areas deeper than 100 m;with the deepening of the mixed layer,the SST cooling decreased,but not monotonously.