Diurnal Cycle of Summer Rainfall in Shandong of Eastern China
- 作者：Hong ZhuoPing ZhaoTianjun Zhou
- 会议时间：2013-10-23
- 关键词：diurnal cycle ; summer precipitation ; Shandong of eastern China ; climatic characteristics
- 作者单位：Hong Zhuo(The Meteorological Center of North China Air Traffic Management Bureau,Beijing,100649,China)Ping Zhao,Tianjun Zhou(State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing,10081,China)
- 母体文献：第30届中国气象学会年会论文集
- 会议名称：第30届中国气象学会年会
- 会议地点：南京
- 主办单位：中国气象学会
- 语种：chi
摘要
Using the hourly precipitation data at 123 gauge stations of Shandong province in eastern China during 1996-2008,the authors examine the spatial distribution of summer (June–July-August) precipitation amount (PA),precipitation intensity (PI),and precipitation frequency (PF) and their diurnal cycles.The results show that the diurnal peak of PA decreases from the southeastern to northwestern Shandong and mainly appears in the early morning and afternoon.The large diurnal peak of PA mainly appears in a large area from the hilly areas of southern Shandong to the eastern coasts.Large diurnal peak of PI mainly appears along the lower reaches of the Yellow River in northern Shandong.The diurnal peak of PF also decreases from southeastern to northwestern Shandong.The diurnal cycles of PA and PI have two peaks and they occur in the early morning and the afternoon,respectively.The diurnal cycle of PF has one peak in the morning.Large PA values show a southwestward time delay over northwestern Shandong,a northeastward time delay over central and southeastern Shandong in the afternoon,and a southeastward time delay over central and southeastern Shandong in the morning.Moreover,they also show a time delay from the central mountains of Shandong to its adjacent areas in the afternoon.When hourly precipitation is weaker,the diurnal cycles of PA and PF show a two-peak feature.With Following the increase of hourly precipitation,the diurnal peak number also tends to increase.