An Observation Study of Atmosphere Boundary Layer Characteristic over Semi-Arid Desert Grassland in Mongolia Plateau on Clear Day in Spring

To understand structure characteristic and change laws of atmosphere boundary layer over semi-arid desert grassland in Inner Mongolia,the situ experiment project named as the aerosol of dust and sand radiate models and research of climate environment and ecological effect were conucted over region of Inner Mongolia during March to April in 2006.Using GFE(L)1 and GTS1 equipments.The results show that characteristic of atmosphere boundary layer change is instinct.The biggest depth of convective boundary layer is about 2000 m,the stable boundary layer depth is less than 900 m,the supper adiabatic boundary layer mean depth is 270 m.The wind direction changing height is from 600 to 2000 m.The lower level east jet appears at 250 m heighs,but west jet nearly appears at 4000 m highs.Multilevel humidity inversion appeared on specific humidity profiles of atmosphere boundary layer.