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中国沙漠 ›› 2008, Vol. 28 ›› Issue (6): 1011-1016.

• 沙漠与沙漠化 • 上一篇    下一篇

塔克拉玛干沙漠肖塘地区空气动力学粗糙度分析

何 清1,2, 缪启龙1; 张瑞军2,3; 艾力·买买提明2; 刘新春2; 霍 文2
  

  1. 1.南京信息工程大学, 江苏 南京 210044; 2.中国气象局乌鲁木齐沙漠气象研究所, 新疆 乌鲁木齐 830002; 3.新疆师范大学地理科学与旅游学院, 新疆 乌鲁木齐 830054
  • 收稿日期:2007-12-03 修回日期:2008-04-04 出版日期:2008-11-20 发布日期:2008-11-20

Analysis on Aerodynamic Roughness in XiaoTang in the Taklimakan Desert

HE Qing1,2, MIAO Qi-long1, ZHANG Rui-jun2,3, Ali Mamtimin2, LIU Xin-chun2, HUO Wen2   

  1. (1.Nanjing University of Information Science & Technology, Nanjing, Jiangsu 210044, China; 2.Institute of Desert Meteorology, China Meteorological Administration, Urumqi, Xinjiang 830002, China; 3.College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi, Xinjiang, 830054, China)
  • Received:2007-12-03 Revised:2008-04-04 Online:2008-11-20 Published:2008-11-20

摘要: 利用塔克拉玛干沙漠北部肖塘地区梯度自动站2007年1月1日至2007年5月31日的观测数据,计算出该区域中性条件下粗糙度范围是1.00×10-11~1.65×10-3 m,平均粗糙度为6.05×10-5 m,接近沙粒粒径的1/30,与平坦沙面粗糙度相似。摩擦速度的范围是0.14~2.33 m·s-1,平均值1.24 m·s-1。粗糙度随下垫面性质变化明显,与稳定度呈正相关,与风速呈负相关,摩擦速度随粗糙度增大而减小。

关键词: 塔克拉玛干沙漠, 肖塘, 粗糙度, 摩擦速度

Abstract: Based on the gradient observational data from January 1, 2007 to May 31, 2007 in the north of the Taklimakan Desert, aerodynamic roughness under condition of neutral stratification atmospheric in XiaoTang is calculated as between 1.00×10-11 to 1.65×10-3 m, the average is 6.05×10-5 m, close to 1/30 of the sand particle size and similar to that on flat sand bed; the range of friction speed is 0.14~2.33 m·s-1, averaged by m·s-1. Roughness changes obviously with the property of underlying surface, has positive correlation with stability, and negative correlation with wind speed. Friction velocity decreases with increasing roughness.

Key words: Taklimakan Desert, XiaoTang region, aerodynamic roughness, friction velocity

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