作者:Bai, J (Bai, Jie)[ 1,2 ] ; Jia, L (Jia, Li)[ 3 ] ; Liu, SM (Liu, Shaomin)[ 1 ] ; Xu, ZW (Xu, Ziwei)[ 1 ] ; Hu, GC (Hu, Guangcheng)[ 3 ] ; Zhu, MJ (Zhu, Mingjia)[ 1 ] ; Song, LS (Song, Lisheng)[ 1 ]

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS

卷: 12  期: 5  页: 943-947

DOI: 10.1109/LGRS.2014.2368580

出版年: MAY 2015

摘要

To validate satellite-based surface fluxes by ground measurements properly, several numerical simulations were carried out at a homogeneous alpine meadow site and mixed cropland site, considering various atmospheric conditions and different land cover distribution types. By comparing various pixel selection methods, the results showed that footprint was significant in insuring a consistent spatial scale between ground measurements and satellite-based surface fluxes, particularly for heterogeneous surface and high-resolution remote sensing data. Because large aperture scintillometer measurements cover larger areas than eddy covariance (EC) system measurements, the spatial heterogeneity at a subpixel scale in complicated surface should be further considered in validating coarse satellite data. Thus, more accurate validation data and scaling methods must be developed, such as measuring surface fluxes at the satellite pixel scale by a flux measurement matrix or airborne EC measurements.

通讯作者地址: Liu, SM (通讯作者)

Beijing Normal Univ, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China.

地址:

[ 1 ] Beijing Normal Univ, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China

[ 2 ] China TopRS Technol Co Ltd, Beijing 100039, Peoples R China

[ 3 ] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China