塔克拉玛干沙漠湍流尺度

doi:10.7522/j.issn.1000-694X.2014.00082

摘要/Abstract

摘要： 利用塔克拉玛干沙漠腹地塔中地区近地层32 m高度涡动相关系统2009年1、4、7、10月的湍流观测数据,对流动沙漠地区不同稳定度下的湍流特征进行了分析。结果表明:(1)流动沙漠区在不同季节、不同稳定度条件下的近地层湍流欧拉时间自相关系数R_u(t)、R_v(t)、R_w(t)衰减存在明显的时间差异。春季R_w(t)的衰减最快,夏季3个方向的欧拉时间自相关系数衰减时间相近;(2)欧拉时间自相关系数主要表现出强衰减、逐渐衰减和缓慢衰减3种类型,沙尘天气的欧拉时间自相关系数衰减总体上要强于晴天;(3)湍流的时间积分尺度L_t(z)最小,L_t(x)和L_t(y)大小相近,在沙尘暴发生时,水平风速占主导,而垂直气流很难发展;(4)湍流的空间尺度在不同季节和不同稳定度条件下明显不同:L(x)平均值6.02 m,L(y)平均值6.90 m,L(z)平均值0.73 m;湍流水平空间尺度大多数情况下呈扁平的椭球体,且水平方向呈明显的椭圆形状。

关键词: 塔克拉玛干沙漠, 湍流, 尺度

Abstract: In this paper, the Euler time correlation coefficients and the integral time scale of turbulence in the surface layer over the Taklimakan Desert were analyzed by eddy correlation system data from January to December, 2009. (1) The Euler time correlation coefficients as R_u(t), R_v(t) and R_w(t) are significantly different under different stability condition and different season. The attenuation speed rate of vertical Euler time correlation coefficient R_w(t) is fastest in spring and attenuation time of three direction Euler time correlation coefficients are similar in summer. (2) Euler time correlation coefficients are demonstrated three attenuation types as heavy, gradually and slowly. The attenuation rate of Euler time correlation coefficients in sandstorm weather is stronger than on the sunny day. (3) For the turbulence time integral scale, R_t(z) is minimum, R_t(x) and R_t(y) are similar. In the sandstorm process, the horizontal wind speed dominates while turbulence develop is very difficult. (4) The spatial scales of turbulence in desert are significantly different under different stability and different seasons. The average of L(x), L(y) and L(z) are 6.02 m, 6.90 m and 0.73 m, respectively. In most cases, the shape of spatial scales present ellipsoid and similar to ellipse at horizontal level.

Key words: Taklimakan Desert, turbulence, scale

中图分类号:

P425.2

买买提艾力·买买提依明, 李振杰, 金莉莉, 缪启龙, 何清. 塔克拉玛干沙漠湍流尺度[J]. 中国沙漠, 2015, 35(4): 983-993.

Ali Mamtimin, Li Zhenjie, Jin Lili, Miao Qilong, He Qing. Scale of Atmospheric Turbulence of the Taklimakan Desert[J]. JOURNAL OF DESERT RESEARCH, 2015, 35(4): 983-993.

参考文献

[1] 曹文俊,朱汶.天津市郊近地面层湍流特征量的研究[J].南京气象学院学报,1993,16(2):201-207.
[2] 李宗恺,潘云仙,孙润桥.空气污染气象学原理及应用[M].北京:气象出版社,1985:124-132.
[3] Monin A S,Obukhov A M.Basic laws of turbulent mixing in the atmosphere near the ground[J].Trudy Akademiia Nauk SSR Geofizicheskogo Instituta,1954,24:163-187.
[4] Lumley J L,Panofsky H A.The Structure of Atmospheric Turbulence[M].New York,USA:Interscience Publishers,1964:239.
[5] Monin A S,Yaglom A M.Statistical Fluid Mechanics:Mechanics of Turbulence[M].Cambridge,USA:MIT Press,1971:782-783.
[6] Wyngaard J C,Cote O R,lzumi Y.Local free convection,similarity,and the budgets of shear stress and heat flux[J].Journal of Atmospheric Science,1971,28:11171-11182.
[7] Panofsky H A,Teanekes H,Lenschow D H,et al.The characteristics of turbulent velocity components in the surface layer under convective conditions[J].Boundary-Layer Meteorology,1997,11:355-361.
[8] 高由禧.“HEIFE”专刊(1)前言.[J]高原气象,1990,9(2):1-2.
[9] 徐玉貌,周朝辅,李振华,等.广州市近地层大气的湍流微结构和谱特征[J].大气科学,1993,17(3):338-348.
[10] 吕达仁,陈佐忠,陈家宜,等.内蒙古半干早草原土壤-植被-大气相互作用[M].北京:气象出版社,2005.
[11] 周明煌,徐祥德,卞林根,等.青藏高原大气边界层观测分析与动力学研究[M].北京:气象出版社,2000:46-48.
[12] 张强,胡隐樵.大气边界层物理学的研究进展和面临的科学问题[J].地球科学进展,2001,16(4):526-531.
[13] 宋丽莉,毛慧琴,黄浩辉,等.登陆台风近地层湍流特征观测分析[J].气象学报,2005,63(6):915-921.
[14] 胡非,洪忠祥,陈家宜,等.白洋淀地区非均匀大气边界层的综合观测研究试验介绍及近地层微气象特征分析[J].大气科学,2006,30(5):883-893.
[15] 王介民,王维真,奥银焕,等.复杂条件下湍流通量的观测与分析[J].地球科学进展,2007,22 (8):791-797.
[16] 彭珍,刘熙明,洪忠祥,等.北京地区一次强沙尘暴过程的大气边界层结构和湍流输送特征[J].气候与环境研究,2007,12(3):267-276.
[17] 李自鑫,孙鉴泞,袁仁民,等.地表非均匀加热条件下边界层湍流特征的实验研究[J].南京大学学报(自然科学版) ,2008,44(6):575-582.
[18] 杜云松,彭珍,张宁,等.南京地区一次降水过程湍流特征研究[J].南京大学学报(自然科学版),2011,47(6):703-711.
[19] 岳平,张强,牛生杰,等.草原下垫面湍流动量和感热相似性函数及总体输送系数的特征[J].物理学报,2012,61(21):548-559.
[20] 梁捷宁张镭鲍婧,等.黄土高原复杂地形受中尺度运动影响的稳定边界层湍流特征[J].大气科学,2012,37(1):113-123
[21] 吴灏,叶柏生,吴锦奎,等.疏勒河上游高寒草甸下垫面湍流特征分析[J].高原气象,2013,32(2):368-376.
[22] 王介民,刘晓虎,马耀明.HEIFE戈壁地区近地层大气的湍流结构和输送特征[J].气象学报,1993,51(3):343-350.
[23] 缪启龙,温雅婷,何清,等.沙漠腹地春夏季近地层大气湍流特征观测分析[J].中国沙漠,2010,30(1):167-174.
[24] 缪启龙,温雅婷,段春锋.塔克拉玛干沙漠腹地近地层春季铅直湍流的小波分析[J].气象与减灾研究,2008,31(4):1-7.
[25] 温雅婷,焦冰,缪启龙,等.塔克拉玛干沙漠腹地近地层湍流能谱分析[J].中国沙漠,2012,32(6):1716-1712.
[26] 温雅婷,缪启龙,何清,等.南疆一次强沙尘暴的近地层特征和湍流输送分析[J].中国沙漠,2012,32(1):204-209.
[27] 买买提艾力·买买提依明,缪启龙,金莉莉,等.塔克拉玛干沙漠腹地散射辐射特征[J].中国沙漠,2013,33(5):1492-1500.
[28] 金莉莉,何清,买买提艾力·买买提依明,等.塔克拉玛干沙漠腹地辐射平衡和反照率变化特征[J].中国沙漠,2014,34(1):215-224.
[29] Thomas F.Micrometeorology[M].Berlin:Germany:Springer,2008:31-44.
[30] Garratt J R.The Atmospheric Boundary Layer[M].London,UK:Cambridge University Press,1992:10-11.