Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2016, Vol. 52 ›› Issue (5): 829-836.DOI: 10.13209/j.0479-8023.2015.145

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

YANG Yang, LIU Xiaoyang, LU Zhenghui, LI Hao   

  1. Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871
  • Received:2015-04-09 Revised:2015-06-11 Online:2016-09-20 Published:2016-09-20
  • Contact: YANG Yang, E-mail: pku789(at)126.com

博斯腾湖流域戈壁地区大气边界层高度特征研究

杨洋, 刘晓阳, 陆征辉, 李郝   

  1. 北京大学物理学院大气与海洋科学系, 北京 100871
  • 通讯作者: 杨洋, E-mail: pku789(at)126.com
  • 基金资助:
    国家自然科学基金(41075011)资助

Abstract:

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.

Key words: boundary layer height, the Bosten Lake, Richardson number, land lake breeze

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。

关键词: 边界层高度, 博斯腾湖, 理查森数, 湖陆风

CLC Number: