干旱区生态环境知识资源中心(Arid): Scale Invariance of Albedo-Based Wind Friction Velocity

Arid

DOI	10.1029/2019JD031978
	Scale Invariance of Albedo-Based Wind Friction Velocity
	Ziegler, Nancy P.; Webb, Nicholas P.; Chappell, Adrian; LeGrand, Sandra L.
通讯作者	Ziegler, NP
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2020
卷号	125 期号:16
英文摘要	Obtaining reliable estimates of aerodynamic roughness is necessary to interpret and accurately predict aeolian sediment transport dynamics. However, inherent uncertainties in field measurements and models of surface aerodynamic properties continue to undermine aeolian research, monitoring, and dust modeling. A new relation between aerodynamic shelter and land surface shadow has been established at the wind tunnel scale, enabling the potential for estimates of wind erosion and dust emission to be obtained across scales from albedo data. Here, we compare estimates of wind friction velocity (u()) derived from traditional methods (wind speed profiles) with those derived from the albedo model at two separate scales using bare soil patch (via net radiometers) and landscape (via Moderate Resolution Imaging Spectroradiometer [MODIS] 500 m) data sets. Results show that profile-derived estimates ofu()are highly variable in anisotropic surface roughness due to changes in wind direction and fetch. Wind speed profiles poorly estimate soil surface (bed) wind friction velocities necessary for aeolian sediment transport research and modeling. Albedo-based estimates ofu()at both scales have small variability because the estimate is integrated over a defined, fixed area and resolves the partition of wind momentum between roughness elements and the soil surface. We demonstrate that the wind tunnel-based calibration of albedo for predicting wind friction velocities at the soil surface (u(s)) is applicable across scales. The albedo-based approach enables consistent and reliable drag partition correction across scales for model and field estimates ofu(s*)necessary for wind erosion and dust emission modeling.
英文关键词	aerodynamic roughness friction velocity satellite remote sensing albedo aeolian dust
类型	Article
语种	英语
开放获取类型	hybrid, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000565638400009
WOS关键词	SHEAR-STRESS ; ROUGHNESS LENGTH ; AEOLIAN TRANSPORT ; CHIHUAHUAN DESERT ; NEW-MEXICO ; EROSION ; MODEL ; ELEMENTS ; SPACE ; DRAG
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326010
作者单位	[Ziegler, Nancy P.; LeGrand, Sandra L.] US Army, Cold Reg Res & Engn Lab CRREL, Engineer Res & Dev Ctr, Hanover, NH 03755 USA; [Webb, Nicholas P.] USDA ARS Jornada Expt Range, Las Cruces, NM USA; [Chappell, Adrian] Cardiff Univ, Sch Earth & Ocean Sci, Cardiff, Wales
推荐引用方式 GB/T 7714	Ziegler, Nancy P.,Webb, Nicholas P.,Chappell, Adrian,et al. Scale Invariance of Albedo-Based Wind Friction Velocity[J],2020,125(16).
APA	Ziegler, Nancy P.,Webb, Nicholas P.,Chappell, Adrian,&LeGrand, Sandra L..(2020).Scale Invariance of Albedo-Based Wind Friction Velocity.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(16).
MLA	Ziegler, Nancy P.,et al."Scale Invariance of Albedo-Based Wind Friction Velocity".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.16(2020).