The Response of East Asian Monsoon Circulation between Winter and Summer to Sea Surface Temperature over the Pacific Ocean
冬夏东亚季风环流对太平洋热状况的响应

The response of East Asia monsoon circulation between summer and winter to sea surface temperature over the Pacific Ocean is investigated using the NCEP/NCAR reanalysis dataset during 1949-2000.The study focused on the cases that the intensity of East Asian monsoon!circulation between winter and summer were similarly.It had been found out that the intensified(weakened) East Asian monsoon circulation both in winter and summer were associated to the stronger(weaker) Walker circulation in equatorial Pacific and Hadley circulation over East Asian.The variation of the intensity for Walker circulation in equatorical Pacific and the Hadley circulation over East Asian are affected by the variation of sea surface temperature anomaly(SSTA) over equatorial eastern Pacific.It had been pointed out that the East Asian monsoon circulation in both of winter and following summer became stronger(weaker) in La Nia(El Nio) years.The sea surface temperature(SST) over equatorial eastern Pacific was the most important force factor for the seasonal and annual variation of East Asian monsoon circulation.