RELATION OF NORTH ATLANTIC OSCILLATION ANOMALY TO CHINA CLIMATE DURING 1951~1995

By the use of 1873~1995 monthly mean Northern sea level pressure defined is the north Atlantic oscillation index( I NAO ). Studies of the relation of the winter I NAO to the climate of winter and summer over China by using the data for the last 45 years show that the winter I NAO anomaly bears a close relation to the mainland weather/climate of winter and summer.When a strong I NAO occurs China will experience an extensive high temperature and more rainfall in winter,and the summer temperature will be markedly lower in the band between the Yangtze and Huaihe River.Besides, the Northern surface and 500hPa winter and summer circulation features for the years of the strong and weak I NAO are studied and the results indicate that for strong I NAO years,the subtropical high and Siberian high as well as meridional circulation intensity in winter are greatly reduced in vigor with a weak WA teleconnection pattern and feeble east Asian winter monsoon.But the east Asian monsoon will be stronger in the following summer.