Abstract:In this paper, it is analysed that the whole heavy rainfall process caused by Typhoon Freda which covers a very long distance route (near by 3500km) over the East Asia contienent in 1984. It is indicated that such a heavy typhoon-rain with a very long land track experiences the tropic, semi-tropic and ertratropic stages . The characteristics of the heavy rainstorm processes and constructions of the systems in the three stages are studied. Comparing with that the similar rainstorm occurring over the North America contienent, the differences are discussed. The results are used to correct the typical synoptic model and could be considered as the reference for the forecasting of heavy rainfall effected by typhoon over the East Asia.

Abstract:Based on the monthly mean data of the height at 500hPa and sea surface pressure, comparison and analysis are made on the regional difference of the general circulations, and the climatic features between East Asia and North America, such as frequent tornado disasters in U.S.A. , and distinct monsoon rainy belts in China.

Abstract:With high resolution FTIR,the measurements of solar infrared spectra in remerhaven were made. Bated on HITRAN data basa and line-by-line method, fitting spectra have been calculated.HCI and HF vertical concentration profiles in Bremerhaven have been obtained.