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DOI	10.5194/hess-15-1403-2011
	Estimating surface fluxes over middle and upper streams of the Heihe River Basin with ASTER imagery
	Ma, W.; Ma, Y.; Hu, Z.; Su, Z.; Wang, J.; Ishikawa, H.
通讯作者	Ma, W (通讯作者)
发表日期	2011
ISSN	1027-5606
EISSN	1607-7938
起始页码	1403
结束页码	1413
卷号	15 期号:5
英文摘要	Land surface heat fluxes are essential measures of the strengths of land-atmosphere interactions involving energy, heat and water. Correct parameterization of these fluxes in climate models is critical. Despite their importance, state-of-the-art observation techniques cannot provide representative areal averages of these fluxes comparable to the model grid. Alternative methods of estimation are thus required. These alternative approaches use (satellite) observables of the land surface conditions. In this study, the Surface Energy Balance System (SEBS) algorithm was evaluated in a cold and arid environment, using land surface parameters derived from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data. Field observations and estimates from SEBS were compared in terms of net radiation flux (R-n), soil heat flux (G(0)), sensible heat flux (H) and latent heat flux (lambda E) over a heterogeneous land surface. As a case study, this methodology was applied to the experimental area of the Watershed Allied Telemetry Experimental Research (WATER) project, located on the mid-to-upstream sections of the Heihe River in northwest China. ASTER data acquired between 3 May and 4 June 2008, under clear-sky conditions were used to determine the surface fluxes. Ground-based measurements of land surface heat fluxes were compared with values derived from the ASTER data. The results show that the derived surface variables and the land surface heat fluxes furnished by SEBS in different months over the study area are in good agreement with the observed land surface status under the limited cases (some cases looks poor results). So SEBS can be used to estimate turbulent heat fluxes with acceptable accuracy in areas where there is partial vegetation cover in exceptive conditions. It is very important to perform calculations using ground-based observational data for parameterization in SEBS in the future. Nevertheless, the remote-sensing results can provide improved explanations of land surface fluxes over varying land coverage at greater spatial scales.
关键词	SPACEBORNE THERMAL EMISSION LAND-SURFACE TIBETAN PLATEAU HETEROGENEOUS LANDSCAPE HEAT-TRANSFER TEMPERATURE ENERGY AREA SOIL SEPARATION
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000291088600004
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257926
推荐引用方式 GB/T 7714	Ma, W.,Ma, Y.,Hu, Z.,et al. Estimating surface fluxes over middle and upper streams of the Heihe River Basin with ASTER imagery[J]. 中国科学院青藏高原研究所,2011,15(5).
APA	Ma, W.,Ma, Y.,Hu, Z.,Su, Z.,Wang, J.,&Ishikawa, H..(2011).Estimating surface fluxes over middle and upper streams of the Heihe River Basin with ASTER imagery.HYDROLOGY AND EARTH SYSTEM SCIENCES,15(5).
MLA	Ma, W.,et al."Estimating surface fluxes over middle and upper streams of the Heihe River Basin with ASTER imagery".HYDROLOGY AND EARTH SYSTEM SCIENCES 15.5(2011).