Abstract:In this paper?a synthetical analysis is made on occluded energy tongue and dry-warm lid for severe hailstorm forecasting in North China,with the conventional observations. A example of hailstorm forecast from the analysis is shown.

Abstract:In this paper the echo characteristics of rain and heavy rain in Hefei area are analysed. The method, using single radar echo data to produce very short" range precipitation forecasting, and its skill are presented and discussed. The preliminary results show the method has somewhat skill and can be improved if other data would be incorporated.

Abstract:Based on the experiments during the period 1984-1987, this paper analyzes systematically the influences of soil moisture on stoma resistance, transpiration, photosynthesis, milking rate and yield. Using mathematical method and the theory of optimum segmentation, the optimum soil moisture and the drought indexes can be determined. During the period of jointing to tasseling,they are 15.5% and 10.5 (as percentage of dry weight of soil), which are 71.4% and 48.4 of field capacity respectively. But for the period of tasseling to maturing, they are 16.7% and 10.7%, which are 77% arid 49.3% of field capacity They are useful to reasonable irrigation.

Abstract:Based on the investigation of the microclimate in some cases in western Guizhou Province, the author projposes that the wind speed in a cave depends on the number of mouths of the cave and the shape of it. The air temperature in a cave is determined by the thermal character of groundwater or rock and by the air movement .in it. The humidity in a cave is related not only with the wind in the cave and the shape of the cave, but also with the volume of groundwater the flows into the cave. Normally, the relative Humidity is 90-.100%, expect for the mouth's area of the cave through which wind is blowing.

Abstract:Based on the densified observations, the summer precipitation characteristics on meso-'scale in Beijing, Tianjin and Hebei Areas are studed. The heavy rain generated in the weak wind field is discussed.