Numerical Simulations of Anomalies of Precipitation and Surface Air Temperature in China in the Summer of 1997

The anomalies of precipitation and surface air temperature in the summer (June to August) of 1997 are simulated by use of a global spectral numerical climate model (L9R15) developed in Australia originally and modified in LASG. The purpose of this paper is to study the effect of the E1 Nino event that happened in that year on the anomalies. The results show that the 1997 E1 Nino event does have a lot of influences on the climatic anomaly in that summer, however, the effect is not the same as ponted out by statistical studies. Therefore, the effects of the E1 Nino events are of uncertainties. The effects of the E1 Nino events on the regional climate in China might be different due to the different SSTA distributions over the western and northwestern Pacific in the E1 Nino years. It is likely more important to pay attention to the SSTA distributive patterns and values in the Chinese adjacent oceans. Besides the E1 Nino event there might be other factors such as the South Asia high at the 100 hPa level which has more direct impact on the climatic anomaly in China and can be taken as another strong signal of the climatic change in the atmosphere.