INFLUENCES OF WINTER-STRENGTHEN PATTERN AND WINTER-WEAKEN PATTERN OF EL NIÑO AND LA NIÑA ON DROUGHT/FLOOD IN SUMMER OVER CHINA

According to the inter-monthly SSTA variation during winter in equatorial East Pacific after the occurrings of El Niño and La Niña onset, the winter-strengthen pattern and winter-weaken pattern of El Niño and La Niña are defined. The characteristics of the general circulation in winter, spring and summer, East Asian monsoon, summer rainfall and the distribution of drought/flood in China are discussed. It is shown that the four kinds of patterns for summer rainfall and drought/flood in China could be associated with different phases of ENSO cycle during winter, and with different responses of the general circulation and East Asian monsoon to that. Finally, a physics concept pattern is proposed about the rainfall distribution patterns in summer over China which are associated with different patterns of El Niño and La Niña in winter as well as the general circulation and the East Asian monsoon.