Arid
DOI10.1016/j.advwatres.2012.06.005
Mapping daily evapotranspiration at Landsat spatial scales during the BEAREX’08 field campaign
Anderson, Martha C.1; Kustas, William P.1; Alfieri, Joseph G.1; Gao, Feng1; Hain, Christopher2; Prueger, John H.3; Evett, Steven4; Colaizzi, Paul4; Howell, Terry4; Chavez, Jose L.5
通讯作者Anderson, Martha C.
来源期刊ADVANCES IN WATER RESOURCES
ISSN0309-1708
EISSN1872-9657
出版年2012
卷号50页码:162-177
英文摘要

Robust spatial information about environmental water use at field scales and daily to seasonal timesteps will benefit many applications in agriculture and water resource management. This information is particularly critical in arid climates where freshwater resources are limited or expensive, and groundwater supplies are being depleted at unsustainable rates to support irrigated agriculture as well as municipal and industrial uses. Gridded evapotranspiration (ET) information at field scales can be obtained periodically using land-surface temperature-based surface energy balance algorithms applied to moderate resolution satellite data from systems like Landsat, which collects thermal-band imagery every 16 days at a resolution of approximately 100 m. The challenge is in finding methods for interpolating between ET snapshots developed at the time of a clear-sky Landsat overpass to provide complete daily time-series over a growing season. This study examines the efficacy of a simple gap-filling algorithm designed for applications in data-sparse regions, which does not require local ground measurements of weather or rainfall, or estimates of soil texture. The algorithm relies on general conservation of the ratio between actual ET and a reference ET, generated from satellite insolation data and standard meteorological fields from a mesoscale model. The algorithm was tested with ET retrievals from the Atmosphere-Land Exchange Inverse (ALEXI) surface energy balance model and associated DisALEXI flux disaggregation technique, which uses Landsat-scale thermal imagery to reduce regional ALEXI maps to a finer spatial resolution. Daily ET at the Landsat scale was compared with lysimeter and eddy covariance flux measurements collected during the Bushland Evapotranspiration and Agricultural Remote sensing EXperiment of 2008 (BEAREX08), conducted in an irrigated agricultural area in the Texas Panhandle under highly advective conditions. The simple gap-filling algorithm performed reasonably at most sites, reproducing observed cumulative ET to within 5-10% over the growing period from emergence to peak biomass in both rainfed and irrigated fields. Published by Elsevier Ltd.


英文关键词Evapotranspiration Remote sensing Thermal Land-surface temperature
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000311747300014
WOS关键词ENERGY-BALANCE MODEL ; SURFACE-TEMPERATURE ; EDDY-COVARIANCE ; HEAT-FLUX ; ADVECTIVE CONDITIONS ; DOWNWIND EVOLUTION ; DAILY EVAPORATION ; LOCAL ADVECTION ; 2-SOURCE MODEL ; BOUNDARY-LAYER
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/2XILL650/170986
作者单位1.USDA ARS, Hydrol & Remote Sensing Lab, Beltsville, MD USA;
2.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA;
3.USDA ARS, Natl Lab Agr & Environm, Ames, IA USA;
4.USDA ARS, Conservat & Prod Res Lab, Bushland, TX 79012 USA;
5.Colorado State Univ, Dept Civil & Environm Engn, Ft Collins, CO 80523 USA
推荐引用方式
GB/T 7714
Anderson, Martha C.,Kustas, William P.,Alfieri, Joseph G.,等. Mapping daily evapotranspiration at Landsat spatial scales during the BEAREX’08 field campaign[J]. Colorado State University,2012,50:162-177.
APA Anderson, Martha C..,Kustas, William P..,Alfieri, Joseph G..,Gao, Feng.,Hain, Christopher.,...&Chavez, Jose L..(2012).Mapping daily evapotranspiration at Landsat spatial scales during the BEAREX’08 field campaign.ADVANCES IN WATER RESOURCES,50,162-177.
MLA Anderson, Martha C.,et al."Mapping daily evapotranspiration at Landsat spatial scales during the BEAREX’08 field campaign".ADVANCES IN WATER RESOURCES 50(2012):162-177.
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