干旱区生态环境知识资源中心(Arid): 巴丹吉林沙漠北缘拐子湖流沙下垫面近地层湍流强度和陆面过程特征

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	巴丹吉林沙漠北缘拐子湖流沙下垫面近地层湍流强度和陆面过程特征
其他题名	The Turbulence Intensity of Surface Layer and Land Surface Processes over Guaizi Lake Shifting Sandy Land on the Northern Margin of Badain Jaran Desert
	郑新倩 1; 杨帆 2; 李超凡 3; 潘红林 4; 吉春容 1; 买买提艾力·买买提依明 4; 霍文 4; 杨兴华 4; 周成龙 4
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2019
卷号	39 期号:4 页码:103-112
中文摘要	利用巴丹吉林沙漠北缘拐子湖流沙下垫面2013年7、10月和2014年1、4月的湍流通量资料,计算并分析了研究区近地层湍流强度,同时针对风速分量、温度、水汽和CO_2归一化标准差随稳定度的变化关系和总体输送系数等陆面过程特征进行分析。结果表明:( 1)风速各分量的湍流强度均随风速的增加逐渐减小,风速处于2 m·s~(-1)以下时湍流发展最为旺盛。湍流强度主要由水平方向风速分量决定,垂直方向风速的作用较小,且近中性和不稳定层结利于湍流的发展。与其他地区相比,平坦且没有建筑物的沙漠地区,机械湍流较弱,湍流强度相应较小。( 2)风速各分量的归一化标准差与稳定度( z /L)均满足1 /3次方函数规律,其中垂直方向风速分量的拟合曲线方程较好。( 3)动量输送系数C_d具有明显的夏季高、冬季低的变化状态且各月的日变化形态均呈夜间低、日间高的循环形态。热量输送系数C_h的不同月份日变化间并没有明显的排列次序,且日出日落前后具有明显的波动。不稳定层结时,C_d和C_h均随风速的增加逐渐减小;稳定层结时,C_d和C_h均随着风速的增加逐渐上升。
英文摘要	In this paper,we analyzed the turbulent intensity,the relationship between normalized standard deviations of wind velocity components,temperature,water vapor,CO_2 and stability parameters z /L and bulk transfer coefficients in the atmospheric surface layer over Guaizi Lake shifting sandy land based on land-atmosphere turbulent flux data in July,October 2013 and January and April 2014. The results indicated that the turbulent intensity of wind velocity components decreased with the increase of wind velocity. The development of turbulence was much vigorous,when the average wind velocity was below 2 m·s~(-1). The near-neutral and unstable atmospheric stratification condition were favorable to the development of turbulence. Also,the horizontal components of wind velocity were main factor that could impact turbulent intensity,and the influence of vertical wind velocity was relatively weak. Compared with other underlying surface,because of the desert was relatively flat,the mechanical turbulence of desert was weak. So the turbulent intensity of desert also was small. Further,we also found the normalized standard deviations of wind velocity components ( i.e.,sigma_u /u ,sigma_v /u and sigma_w /u * ) and stability parameter ( z /L ) generally met 1 /3 power law,and sigma_u /u ,sigma_v /u and sigma_w /u * increased as the upw ard of \| z /L \|. Meanwhile,the regression curve equation of normalized standard deviation of vertical wind speed component and z /L were better than that of horizontal wind speed components. On the other hand,under the near-neutral condition,normalized standard deviations of wind velocity components were approximately constant,which presented more similar to those in hinterland of Taklimakan Desert and Heihe Gobi,and significantly smaller those in alpine meadow and sparse vegetation regions of the Qinghai- Tibet Plateau. In addition,the monthly average daily variation of momentum transfer coefficient ( C_d ) illustrated the standard unimodal type daily cycle pattern. Meanwhile,the daily variation curve of C_d showed the apparent seasonal variations owing to the difference of season,namely,with the highest C_d in summer,the second in spring and autumn,and the low est in winter. The monthly mean daily variation of heat transfer coefficient ( C_h ) presented the less regularity and the obvious fluctuation was found at sunrise and sunset during diurnal variation. Bulk transfer coefficients decrease with increasing wind speeds under unstable atmospheric condition,and increase with increasing wind speeds under stable atmospheric condition.
中文关键词	巴丹吉林沙漠 ; 湍流强度 ; 归一化标准差 ; 总体输送系数
英文关键词	Badain Jaran Desert turbulence intensity normalized standard deviation bulk transfer coefficients
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6526897
来源机构	中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239803
作者单位	1.新疆农业气象台, 乌鲁木齐, 新疆 830002, 中国; 2.中国气象局乌鲁木齐沙漠气象研究所中国气象局塔克拉玛干沙漠气象野外科学试验基地;;兰州大学大气科学学院, ;;, 乌鲁木齐;;兰州, 新疆;;甘肃 830002;;730000, 中国; 3.南京信息工程大学地理科学学院, 南京, 江苏 210044, 中国; 4.中国气象局乌鲁木齐沙漠气象研究所中国气象局塔克拉玛干沙漠气象野外科学试验基地, 乌鲁木齐, 新疆 830002, 中国
推荐引用方式 GB/T 7714	郑新倩,杨帆,李超凡,等. 巴丹吉林沙漠北缘拐子湖流沙下垫面近地层湍流强度和陆面过程特征[J]. 中国气象局乌鲁木齐沙漠气象研究所,2019,39(4):103-112.
APA	郑新倩.,杨帆.,李超凡.,潘红林.,吉春容.,...&周成龙.(2019).巴丹吉林沙漠北缘拐子湖流沙下垫面近地层湍流强度和陆面过程特征.中国沙漠,39(4),103-112.
MLA	郑新倩,et al."巴丹吉林沙漠北缘拐子湖流沙下垫面近地层湍流强度和陆面过程特征".中国沙漠 39.4(2019):103-112.