Regional land surface energy fluxes by satellite remote sensing in the Upper Xilin River Watershed (Inner Mongolia, China)
Regional land surface energy fluxes by satellite remote sensing in the Upper Xilin River Watershed (Inner Mongolia, China)
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DOI：
10.1007/s00704-006-0241-9
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发表时间：
2007-03-01
影响因子：
3.4
通讯作者：
Berger, F. H.
中科院分区：
文献类型：
--
作者：
Fan, L.;Liu, Sh.;Berger, F. H.
中国的内蒙古草原是温带半干旱草原的代表。研究该地区的陆面过程将有助于加深对区域气候形成及其对全球气候变化反馈的认识。卫星遥感为研究区域尺度上的陆地-大气相互作用提供了极好的机会。有必要发展可行和合理的基于遥感的方法来绘制特定研究区域的地表能量通量图。利用Landsat 7ETM+数据对已发表的算法和经验公式进行了检验，得到了锡林河上游流域地表反射率、地表温度、NDVI和地表能量通量(净辐射、土壤热通量、感热通量和潜热通量)的区域分布，中国。提出了一种新的土地利用/土地覆盖分类方法，并将其应用于区划分析。对遥感得到的地表反射率、地表温度、净辐射和感热通量的验证结果表明，它们的误差分别约为13%、4%、1%和28%。该研究对整个流域的进一步研究具有一定的指导意义。
The Inner Mongolia grassland of China is representative of semi-arid grasslands in temperate zones. Studying land surface processes in this region will improve the understanding of regional climate formation and the feedback with global climate change. Satellite remote sensing provides an excellent opportunity to study land-atmosphere interactions at the regional scale. It is necessary to develop feasible and reasonable remote sensing-based methods to map surface energy fluxes for a specific study area. In this paper, previously published algorithms and empirical formulae were tested with Landsat 7 ETM+ data to derive the regional distributions of land surface reflectance, surface temperature, NDVI and land surface energy fluxes (net radiation, soil heat flux, sensible heat flux and latent heat flux) over the upper Xilin River watershed in Inner Mongolia, China. A new land use/land cover classification was developed and applied for regionalization analysis. Validation of remote sensing derived surface reflectance, surface temperature, net radiation and sensible heat flux with field measurements shows differences of about 13, 4, 1, and 28%, respectively. This study provides valuable guidance for further investigation of the whole watershed.