Abstract:The anomalous climatic characteristics of subtropical high and its formation cause in the West Pacific in 1994 is analysed. It is shown that the intensity is strong,the seasonal northward jump is earlier than normal and the position is persistenly further north in midsummer. Such characteristics associate with the ocean-atmosphere interaction besides the climatic backgrounds.Meanwhile, the SST anomaly field responded to the subtropical high anomaly is discussed.

Abstract:The relationship between the normalitied difference vegetation index(NDVI)and precipita-tion is analysed, using the precipitation data in the arid and semi-arid region in the north of China. The result shows that the nonlinear relationship between cumulative NDVI (and maximumNDVI) by the end of growing season and the cumulative precipitation is significant. Its correlation coefficient is 0.78; In Huabei and Southwest China,the relationship between cumulative NDVI (and maximum NDVI) in the medium of growing season and the absolute moisture in 0-50cm soil layer is nonlinear. Its correlation coefficient is 0.60-0.65 (0.60-0.63).

Abstract:The principle and design for a new version of AFDOS by using the media-mix technique have been discussed. The hardWare structure and software principle, including packing, synchro-trans,overlapping and computer-vision technique have been described. An outlook on the applications of information collected by the media-mix technique,data-simulating, integrate forecast decision is presented and a modern weather-map discussing technique has been investigated.

Abstract:A brief introduction of the GRIB code's feature is given,and the remote-network transfer protocol of the NWP products and its decoding principle is also presented.

Abstract:The cold current and low-level cloud snowfall in winter is a special weather phenomena over the north coastal area of Shandong Peninsula. Fifty months' data of day-to-day and hour-to-hour snowfall, temperature and sea-surface temperature at Yantai Meteorological Station within the period of November and next year's March from 1981 to 1990 is analysed,for studying the cause of the cold current and low-level cloud snowfall. The favourable circulation pattern, sea-air interaction, stability of the low layer, wind shear of the low layer and effect of orographic lifting are the main causes that form the cold current and low-level cloud and caused snow-fall.

Abstract:A skillfull scheme,with which atmospheric and oceanic elements are selected and periodic series of the rainfall are taken as predictors too.is suggested for seasonal forecast of rainfall in summer over China. The test results for an independent sample of 1991-1994 are satisfactory.

Abstract:Based on the fact of low-frequency oscillation phenomenon existing in atmosphere, the circulation and low-frequency oscillation features of the cold wave chilling process from November 17 to 21, 1993 are clarified. It is significant in improving the ability of the cold wave mid-range forecast.

Abstract:A prediction model for summer floods/droughts in the Nanjing-Zhengjiang region by fuzzy mean generating function is developed. The model is satisfactory, especially in cases of severe floods/droughts. The results of the precipitation prediction in this region during the Meiyu period in 1994 is close to actual precipitation.

Abstract:In view of the characteristics of local weather prediction, the available numerical prediction products as well as the real-time radiosonde data, a practical scheme for predicting the summer precipitation is presented by introducing mesoscale data to the mesoscale numerical prediction model MM4 in order to increase the accuracy of prediction to the unexpected convective precipitation. The diagnostic field of the daily physical factors were calculated by using MM4 model. These calculation results are added into the numerical prediction production of the ECMWF and obtained 41 prediction fields, then the precipitation prediction equation is developed by using the canonical correlation analysis,successive regression as well as discriminatory analysis methods.

Abstract:The analysis of the identification error of soil temperature in precessing long-term surface data is described. Five decitive methods of human-machine interaction are given,are they and effective.

Abstract:The correlation analysis between the forest fire data in Shennongjia area and the monthly mean temperature over the Qinghai-Xizang Plateau from 1970 to 1991 has beed conducted. The long-term forecasting model of forest fire occurrence in this area from March to May is established. Varification of the actual situation in 1992 and 1993 suggests that the effect of this model is proved to be successful.

Abstract:Five categories of good-poor years, i.e.best, good, normal, poor and worst, were divided based on yield data per unit area of flue-cured tobacco in Fengyang County,Anhui Province, from 1951 to 1990. Poor or worst years in relation to meteorological disasters,and laws of change.with years were analysed by adopting the harmonic method. The distribution of meteorological disasters in the future is predicted and the corresponding countermeasures is studied.