干旱区生态环境知识资源中心(Arid): LAS在西北干旱区荒漠均匀下垫面的观测研究

Arid

	LAS在西北干旱区荒漠均匀下垫面的观测研究
其他题名	Observation Study in Desert Homogeneous of Arid Region in Northwestern of China Using Large Aperture Scintillometers
	陈继伟 1; 左洪超 1; 王介民 2; 王树金 1; 陈伯龙 1; 庄少伟 1
来源期刊	高原气象
ISSN	1000-0534
出版年	2013
卷号	32 期号:1 页码:56-64
中文摘要	利用"古浪非均匀近地层观测试验"的仪器平行对比观测部分试验数据,首先分析荒漠均匀下垫面大孔径闪烁仪(Large Aperture Scintillometer,LAS)光径线上等间距架设的4台涡动相关仪(EddyCovariance System,EC)观测的摩擦速度和感热通量的一致性。然后,基于4种不同下垫面建立稳定度普适函数分析,利用4台EC观测摩擦速度平均值,计算了LAS观测区域的感热通量,进而比较了LAS和EC两者观测值的差异。结果表明,4台EC观测的摩擦速度与感热通量一致性好,摩擦速度的差别<10%,感热通量的差别在10%左右。4种稳定度普适函数计算的LAS区域感热通量在白天、夜晚与EC观测平均值变化趋势一致,但计算值偏大;TAG(Thiermann and Grassl)稳定度普适函数计算值与EC观测平均值较接近。其主要原因除不同下垫面试验所得稳定度普适函数的差异外,Kipp&Zonen LAS所测感热通量的系统性偏高不可忽视。
英文摘要	Using the experimental data that came from the instrument parallel comparison in Gulang Heterogeneous Underlying Surface Layer Experiment, the consistency of friction velocity and sensible heat flux observed by four sets of EC (Eddy Covariance System) which equidistantly lay on light path line of LAS (Large Aperture Scintillometer) was analyzed at first, and then the difference among the calculated regional sensible heat fluxs observed by LAS based on universal stability functions established by four different kinds of underlying surface employing the mean value of observation friction velocity from four sets of EC was analyzed, finally a further comparison between the two observations of LAS and EC was made. The results show that, friction velocity and sensible heat flux observed by four sets of EC have a good trend of consistency; the difference of friction velocity is less than 10%, and the difference of sensible heat flux is about 10%. The regional sensible heat flux of LAS calculated by four kinds of universal stability functions in the daytime and nighttime have identical changing trend with the average observed by EC, the calculated value is usually bigger than normal, the calculated value of TAG universal stability function is closer to the average value observed by EC. Except for the main reason that universal stability functions from experiments of different underlying surface have some differences, the sensible heat flux observed by Kipp&Zonen LAS is systemic higher can not be ignored too.
中文关键词	大孔径闪烁仪(LAS) ; 涡动相关法(EC) ; 区域感热通量 ; 稳定度普适函数
英文关键词	Large Aperture Scintillometer (LAS) Eddy Covariance System (EC) Regional sensible heat flux Universal stability function
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:4780979
来源机构	中国科学院西北生态环境资源研究院 ; 兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229679
作者单位	1.兰州大学大气科学学院, 兰州, 甘肃 730000, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	陈继伟,左洪超,王介民,等. LAS在西北干旱区荒漠均匀下垫面的观测研究[J]. 中国科学院西北生态环境资源研究院, 兰州大学,2013,32(1):56-64.
APA	陈继伟,左洪超,王介民,王树金,陈伯龙,&庄少伟.(2013).LAS在西北干旱区荒漠均匀下垫面的观测研究.高原气象,32(1),56-64.
MLA	陈继伟,et al."LAS在西北干旱区荒漠均匀下垫面的观测研究".高原气象 32.1(2013):56-64.