Preliminary Inspect about the Effect of Urbanization on Precipitation Distribution in Beijing Area
城市化与北京地区降水分布变化初探

According to the urbanization extent of Beijing area,and defining 1980 as the dividing point,the period from 1961 to 1980 is defined as the slow urbanization period,and the period from 1981 to 2000 as the quick urbanization period,and then by using the precipitation data of 40 years and 14 normal standard weather stations,the possible influence of urbanization on the precipitation distribution in Beijing area is presented.The preliminary results concluded that by comparing the relative precipitation distribution,the significant change of precipitation distribution has been occurred in winter between the slow and quick urbanization period.In other words,during the slow urbanization period,the precipitation amount in the South area of Beijing is relatively more than that in the North area,and during the quick urbanization period,the precipitation amount in the South area is relatively less than that in the North area.For the other seasons,the significant and systematical change of the precipitation distribution did not occurred.The above conclusion is different from domestic and overseas relevant similar research results.