A Multi-Scale Validation Strategy for Albedo Products over Rugged Terrain and Preliminary Application in Heihe River Basin, China

作者:Lin, XW (Lin, Xingwen)[ 1,3 ] ; Wen, JG (Wen, Jianguang)[ 1,2 ] ; Liu, QH (Liu, Qinhuo)[ 1,2 ] ; Xiao, Q (Xiao, Qing)[ 1 ] ; You, DQ (You, Dongqin)[ 1,2 ] ; Wu, SB (Wu, Shengbiao)[ 1,3 ] ; Hao, DL (Hao, Dalei)[ 1,3 ] ; Wu, XD (Wu, Xiaodan)[ 4 ]

REMOTE SENSING

卷: 10  期: 2

文獻號: 156

DOI: 10.3390/rs10020156

出版年: FEB 2018

文獻類型:Article

摘要

The issue for the validation of land surface remote sensing albedo products over rugged terrain is the scale effects between the reference albedo measurements and coarse scale albedo products, which is caused by the complex topography. This paper illustrates a multi-scale validation strategy specified for coarse scale albedo validation over rugged terrain. A Mountain-Radiation-Transfer-based (MRT-based) albedo upscaling model was proposed in the process of multi-scale validation strategy for aggregating fine scale albedo to coarse scale. The simulated data of both the reference coarse scale albedo and fine scale albedo were used to assess the performance and uncertainties of the MRT-based albedo upscaling model. The results showed that the MRT-based model could reflect the albedo scale effects over rugged terrain and provided a robust solution for albedo upscaling from fine scale to coarse scale with different mean slopes and different solar zenith angles. The upscaled coarse scale albedos had the great agreements with the simulated coarse scale albedo with a Root-Mean-Square-Error (RMSE) of 0.0029 and 0.0017 for black sky albedo (BSA) and white sky albedo (WSA), respectively. Then the MRT-based model was preliminarily applied for the assessment of daily MODerate Resolution Imaging Spectroradiometer (MODIS) Albedo Collection V006 products (MCD43A3 C6) over rugged terrain. Results showed that the MRT-based model was effective and suitable for conducting the validation of MODIS albedo products over rugged terrain. In this research area, it was shown that the MCD43A3 C6 products with full inversion algorithm, were generally in agreement with the aggregated coarse scale reference albedos over rugged terrain in the Heihe River Basin, with the BSA RMSE of 0.0305 and WSA RMSE of 0.0321, respectively, which were slightly higher than those over flat terrain.

通訊作者地址: Wen, JG; Liu, QH (通訊作者)

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

通訊作者地址: Wen, JG; Liu, QH (通訊作者)

Joint Ctr Global Change Studies JCGCS, Beijing 100875, Peoples R China.

地址:

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

[ 2 ] Joint Ctr Global Change Studies JCGCS, Beijing 100875, Peoples R China

[ 3 ] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[ 4 ] Lanzhou Univ, Coll Earth Environm Sci, Lanzhou 730000, Gansu, Peoples R China