博斯腾湖流域戈壁地区大气边界层高度特征研究  

Study on Depth of Atmospheric Boundary Layerin Gobi Desert Regions of the Bosten Lake Basin

作　　者：杨洋[1] 刘晓阳[1] 陆征辉 李郝[1] YANG Yang LIU Xiaoyang LU Zhenghui LI Hao(Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871)

机构地区：[1]北京大学物理学院大气与海洋科学系,北京100871

出　　处：《北京大学学报（自然科学版）》2016年第5期829-836,共8页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金(41075011)资助

摘　　要：位于新疆博斯腾湖流域戈壁地区的大气边界层过程受湖泊和戈壁的共同作用,大气边界层结构具有特殊性。利用2013年5月21日至8月28日在博斯腾湖流域戈壁地区获得的大气边界层探测试验资料,分析该地区大气边界层结构特征。结果显示,博斯腾湖流域戈壁地区大气边界层最突出的特征是在夏季典型晴天时对流边界层异常深厚,在所统计的100天探空资料中,有45天大气边界层高度达3000 m以上,最高可达4400 m。同时,探讨深厚对流边界层的形成机制,认为博斯腾湖流域戈壁地区特殊的大气热力环境以及湖风切变等因素是形成深厚对流边界层的重要原因。Due to the combined effects of lake and Gobi, the atmospheric boundary layer located in Gobi desert regions of the Bosten Lake basin is found to possess some special regional characteristics. Based on the data of the developing meteorological observation experiments conducted in the Bosten Lake of Xinjiang Province, the height characteristics of the atmospheric boundary layer from May 21 to August 28, 2013 are analyzed. The result shows that the most prominent feature of the Gobi area of the Bosten Lake Basin is,that the boundary layer often has the deep convection during the typical sunny days in the summer. The statistics also shows that in 45 days out of 100 days, the average height of the atmospheric boundary layer is above 3000 m, and the maximum height reaches 4400 m. The causes of forming the deep convective boundary layer are explored. It is argued that the atmospheric thermodynamic properties and the lake wind shear are important factors to form the deep convective boundary layer.

关 键 词：边界层高度 博斯腾湖 理查森数 湖陆风 

分 类 号：P404[天文地球—大气科学及气象学]