干旱区生态环境知识资源中心(Arid): 绿洲荒漠过渡带涡动相关仪和大孔径闪烁仪的通量源区特征

Arid

	绿洲荒漠过渡带涡动相关仪和大孔径闪烁仪的通量源区特征
其他题名	Characteristic Analysis of Source Area Distribution of Eddy Covariance and Large Aperture Scintillometer in an Oasis-Desert Ecotone
	荣星星; 王鹤松; 褚建民; 艾金龙
来源期刊	中国农业气象
ISSN	1000-6362
出版年	2021
卷号	42 期号:10 页码:823-835
中文摘要	以甘肃民勤绿洲荒漠过渡带涡动相关仪(EC)和大孔径闪烁仪(LAS)的同步观测数据为基础,借助通量足迹模型,分析生长季和非生长季通量源区的分布与变化特征,比较了源区在不同风向下,足迹权重比的变化对二者观测值之间差异的影响。结果表明:(1)研究区在非生长季盛行西北风,在生长季则盛行东风,EC和LAS源区的空间分布与盛行风向一致,二者在非生长季源区的面积均大于生长季。(2)大气稳定条件下EC和LAS的源区面积普遍大于不稳定条件下。随着源区贡献率的增加(由50%增至90%),EC和LAS源区的重叠面积和足迹权重比也增加,并且非生长季的源区重叠程度优于生长季。在生长季和非生长季,EC和LAS源区都呈现不规则分布的特点。(3)相比于东西风向,生长季南北风向下的足迹权重比更高,二者所观测显热通量值更为接近,决定系数(R~2)也更高。说明源区的足迹权重比在一定程度上可以解释EC和LAS在观测结果上的差异,这为地表通量的尺度扩展提供了方法学上的参考。
英文摘要	Eddy covariance(EC)and large aperture scintillometer(LAS)are two commonly used methods for surface flux observation.Investigating the distribution of source area is helpful to improve the spatial representativeness and enhance the understanding of scaling issues such as up-scaling of surface flux data.Based on the observation data from EC and LAS in Minqin,an oasis-desert ecotone,the distribution and variation of source areas were analyzed.In different directions of the source area,the influence of the ratio of weighted-footprint area between EC and LAS(CEC&LAS)on the difference of observed values was compared.The results indicate that:(1)the northwest wind prevails in the non-growing season,while the east wind prevails in the growing season.The spatial distribution of source areas consistent with the prevailing wind direction,and the source areas in the non-growing season are larger than those in the growing season.(2)Source areas of EC and LAS in stable atmospheric conditions are generally larger than those in unstable conditions.With the increase of source contribution(from 50% to 90%),the overlapping area and CEC&LAS also increase.In growing and non-growing season,source areas of EC and LAS distributed in an irregular shape.(3)Compared with the value in east and west,the CEC&LAS in north and south of growing season is higher.Meanwhile,the determination index(R~2)in north and south is also greater than it is in east and west.It reveals that in some degree,CEC&LAS can explain the difference of the observation results between these two methods.This study has contributed to the improvement of the spatial representativeness of surface flux and provide a reference of methodology for the up-scaling of surface flux.
中文关键词	涡动相关 ; 大孔径闪烁仪 ; 通量源区 ; 大气稳定度 ; 足迹权重比
英文关键词	Eddy covariance Large aperture scintillometer Flux source area Atmospheric stability Ratio of weighted-footprint area between EC and LAS
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:7072634
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378092
作者单位	荣星星, 北京林业大学生态与自然保护学院, 北京 100083, 中国.; 王鹤松, 北京林业大学生态与自然保护学院, 北京 100083, 中国.; 褚建民, 中国林业科学研究院林业研究所, 国家林业和草原局林木培育实验室, 北京 100091, 中国.; 艾金龙, 益阳职业技术学院生物与信息工程系, 益阳, 湖南 413049, 中国.
推荐引用方式 GB/T 7714	荣星星,王鹤松,褚建民,等. 绿洲荒漠过渡带涡动相关仪和大孔径闪烁仪的通量源区特征[J],2021,42(10):823-835.
APA	荣星星,王鹤松,褚建民,&艾金龙.(2021).绿洲荒漠过渡带涡动相关仪和大孔径闪烁仪的通量源区特征.中国农业气象,42(10),823-835.
MLA	荣星星,et al."绿洲荒漠过渡带涡动相关仪和大孔径闪烁仪的通量源区特征".中国农业气象 42.10(2021):823-835.