Arid
DOI10.1016/j.advwatres.2012.07.014
Patch scale turbulence over dryland and irrigated surfaces in a semi-arid landscape under advective conditions during BEAREX08
Prueger, J. H.1; Alfieri, J. G.2; Hipps, L. E.3; Kustas, W. P.2; Chavez, J. L.6; Evett, S. R.4; Anderson, M. C.2; French, A. N.5; Neale, C. M. U.3; McKee, L. G.2; Hatfield, J. L.1; Howell, T. A.4; Agam, N.7
通讯作者Prueger, J. H.
来源期刊ADVANCES IN WATER RESOURCES
ISSN0309-1708
出版年2012
卷号50页码:106-119
英文摘要

Quantifying turbulent fluxes of heat and water vapor over heterogeneous surfaces presents unique challenges. For example, in many arid and semi-arid regions, parcels of irrigated cropland are juxtaposed with hot, dry surfaces. Contrasting surface conditions can result in the advection of warm dry air over an irrigated crop surface where it increases the water vapor deficit and, thereby, atmospheric demand. If sufficient water is available, this can significantly enhance evaporative water loss from the irrigated field. The scale and frequency of turbulent eddies over an irrigated surface during periods of strong advection is not fully understood. High frequency (20 Hz) data were acquired over irrigated cotton, wheat stubble, and rangeland fields during the 2008 growing season as part of the Bushland Evapotranspiration and Agricultural Remote Sensing Experiment (BEAREX08). Spectral analysis of momentum and scalar quantities including heat and water vapor revealed low frequency features in the turbulence structure due to the penetration of the surface boundary layer by large-scale eddies during periods of unusually strong advection. Wavelet analysis was applied to assess specific events contributing to the spatial and temporal structure of turbulent flux eddies. The analysis showed that low frequency contributions were linked to both local and regional scale advective processes. These results clearly point to a need to better understand surface energy balance exchange for heterogeneous surfaces in arid and semi-arid regions under conditions of strong local and regional advection. Published by Elsevier Ltd.


英文关键词Surface energy flux Turbulence Evapotranspiration Advection Eddy covariance Surface heterogeneity
类型Article
语种英语
国家USA ; Israel
收录类别SCI-E
WOS记录号WOS:000311747300010
WOS关键词ATMOSPHERIC BOUNDARY-LAYER ; MONIN-OBUKHOV SIMILARITY ; DYNAMIC SUBLAYER ; WAVELET ANALYSIS ; ENERGY-BALANCE ; WATER-VAPOR ; PART I ; SPECTRA ; HEAT ; FLUX
WOS类目Water Resources
WOS研究方向Water Resources
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170990
作者单位1.USDA ARS, Natl Lab Agr & Environm, Ames, IA 50011 USA;
2.USDA ARS, Hydrol & Remote Sensing Lab, Beltsville, MD 20705 USA;
3.Utah State Univ, Logan, UT 84322 USA;
4.USDA ARS, Conservat & Prod Res Lab, Bushland, TX 79012 USA;
5.USDA ARS, Arid Land Agr Res Ctr, Maricopa, AZ 85238 USA;
6.Colorado State Univ, Dept Civil & Environ Engr, Ft Collins, CO 80523 USA;
7.Agr Res Org, Gilat Res Ctr, IL-85280 Negev, Israel
推荐引用方式
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Prueger, J. H.,Alfieri, J. G.,Hipps, L. E.,et al. Patch scale turbulence over dryland and irrigated surfaces in a semi-arid landscape under advective conditions during BEAREX08[J]. Colorado State University,2012,50:106-119.
APA Prueger, J. H..,Alfieri, J. G..,Hipps, L. E..,Kustas, W. P..,Chavez, J. L..,...&Agam, N..(2012).Patch scale turbulence over dryland and irrigated surfaces in a semi-arid landscape under advective conditions during BEAREX08.ADVANCES IN WATER RESOURCES,50,106-119.
MLA Prueger, J. H.,et al."Patch scale turbulence over dryland and irrigated surfaces in a semi-arid landscape under advective conditions during BEAREX08".ADVANCES IN WATER RESOURCES 50(2012):106-119.
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