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学科主题: 地理学::自然地理学
题名: Estimates of land surface heat fluxes of the Mt. Everest region over the Tibetan Plateau utilizing ASTER data
作者: Han, CB (Han, Cunbo)1, 2, 3; Ma, YM (Ma, Yaoming)1, 2; Chen, XL (Chen, Xuelong)4; Su, ZB (Su, Zhongbo)4
通讯作者: Han, CB
刊名: ATMOSPHERIC RESEARCH
发表日期: 2016
DOI: 10.1016/j.atmosres.2015.09.012
卷: 168, 期:0, 页:180-190
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: Regional land surface albedo, land surface temperature, net radiation flux, ground heat flux, sensible heat flux, and latent heat flux were derived in the Mt. Everest area utilizing topographical enhanced surface energy balance system (TESEBS) model and nine scenes of ASTER (Advanced Spacebome Thermal Emission and Reflection Radiometer) data under clear-sky and in-situ measurements at the QOMS station (the Qomolangma Station for Atmospheric Environmental Observation and Research, Chinese Academy of Sciences). The parameterization schemes for diffused and reflected downward shortwave radiation flux of the TESEBS model were improved by introducing the parameters sky-view factor (SVF) and terrain configuration factor (C-t). Then, a so-called C-correction method for land surface albedo was coupled into the TESEBS model to reduce the influences of topography. After topographical correction, the albedo of the dark tilted surface faring away from the Sun was compensated and albedo of the brightness surface facing the Sun was restrained. The downward shortwave radiation flux was broken down into three components including solar direct radiation flux, solar diffused radiation flux, and reflected solar radiation flux by surrounding terrain. The solar diffused radiation flux ranges from about 30 to 60 W/m(2) at the satellite passing time on 6 January 2008. The reflected solar radiation flux changes from 0 to more than 100 W/m(2) in the area covered by glaciers and snows. Thus, it is important to take the topographical effects into account in estimation of surface radiation balance in the mountainous area, especially in the glacier area The retrieved land surface parameters, land surface radiation balance components, and the land surface energy balance components were evaluated by the field measurements in the QOMS station. The estimated results were very close to the in-situ observations with low mean bias errors, low root mean square errors and high correlation coefficients. Although the proposed schemes are rested on a number of hypotheses and the validation is on the relative flat surface, the topographical correction schemes are very effective and can be widely used in the rugged mountainous areas. (C) 2015 Elsevier B.V. All rights reserved.
WOS记录号: WOS:000364892100017
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内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7775
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Ctr Excellence Tibetan Plateau Earth Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Qomolangtna Stn Atmospher Environm Observat & Res, Dingri 858200, Tibet, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Twente, Fac Geoinformat Sci & Earth Observat, NL-7500 AE Enschede, Netherlands

Recommended Citation:
Han, CB ,Ma, YM ,Chen, XL ,et al. Estimates of land surface heat fluxes of the Mt. Everest region over the Tibetan Plateau utilizing ASTER data[J]. ATMOSPHERIC RESEARCH,2016,168(0):180-190.
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