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《Plateau Meteorology》 2010-03
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Structure and Characteristic of the Atmospheric Boundary Layer in Erhai Lakeside Region of Dali

XU An-lun1,DONG Bao-ju1,LIU Jin-song1,SUN Ji-hua2,ZHU Yi-wei1(1.Dali National Climatic Observatory,Dali 671003,China;2.Yunnan Provincial Institute of Meteorology,Kunming 650034,China)  
Using the air sounding data from JICA project of China-Japan cooperation on the planned integrated meteorological observation experiment in monsoon process and heavy rain over the key upper-stream areas in 2008,the characteristics of atmospheric boundary layer height,potential temperature,specific humidity,wind speed and wind direction were analyzed.The results showed that the depth of the convective boundary layer is between 190 m and 2500 m and its average is 1061 m,but the depth of the stable boundary layer is between 60 m and 1760 m and its average is 467 m.Whether in the dry season or in the wet season,air flow is mainly westerly flow and affected by largescale circulation above 2400 m,but it may exist local circulation that caused by lakeland breeze and mountain-valley wind,and air flow is mainly affected by the mountain of Cangshan and Erhai lake below 2400 m.Below about 500 m wind are the mainly wind direction is east and southeast in day time,and south and southwest at night time.
【Fund】: 云南省自然科学基金面上项目(2008CD178);; 云南省气象局青年研究基金项目(Q200808);; 大理州气象局“短平快”项目共同资助
【CateGory Index】: P404
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