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《Scientia Geographica Sinica》 1989-03
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THE INFLUENCE OF SLOPE DIRECTIONS ON PRECIPITATION DISTRIBUTION IN THE CHANGBAI MOUNTAIN AREA

Ma Shuqing (Meteorological Institute of Jilin Province,Changchun)  
According to the topographic and climatic characteristics and long-sequence precipitation data of the Changbai Mountain,the distributive charcteristics of coefficients of relative precipitationin in different slope directions of the main ridges in a year and from May to September are analyzed,and the relation functions between relative precipitation and slope direction angles are establi- shed.The order of precipitation in different slope directionsins on various ridges is SWSWNENE,their corresponding relative Precipitation coefficients are 1.083,1.071,1.060,0.917,0.913,0.912 in a year,and 1.071, 1.059,1.050,0.933,0.933,0.922 from May to September.The precipita- tion is highest in windward slopes and lowest in leeward slopes,and the former is 20.5%more than the latter.The effect of slope is great in the Panling, Weihuling Yingerling ridges and Dunhua basin.The effect of slope on preci- pitation depends on the interception of slope to air current.
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