东北夏季极端温度事件与ENSO发展和衰减阶段的联系

In this paper, the relationship between summer extreme temperature events anomaly in Northeast China and developing and decaying stages of ENSO events is studied, based on daily temperature data of 100 stations in Northeast China, monthly mean reanalysis data from NCEP/NCAR, and sea surface temperature data from Hadley Center. The results show that the impact of ENSO stages on extreme low and high temperature evens is asymetric. La Ni?a events show greater influence than El Ni?o. El Ni?o events at developing stage and La Ni?a at decaying stage both favor the occurance of extreme cold and hot events by means of increasing the seasonal variance in temperature. While extreme cold and hot events shows opposite anomaly during El Ni?o decaying and La Ni?a developing stages, with the latter favors significant decrease in extreme cold events. Sea surface temperature anomaly in north Pacific together with its induced anomalous circulation play an important role in temperature extreme events in North China.