气候变化领域集成服务门户(CCPortal): Estimation of Shortwave Solar Radiation on Clear-Sky Days for a Valley Glacier with Sentinel-2 Time Series

CCPortal

DOI	10.3390/rs12060927
	Estimation of Shortwave Solar Radiation on Clear-Sky Days for a Valley Glacier with Sentinel-2 Time Series
	Zhang, Yanli; Qin, Xiang; Li, Xin; Zhao, Jun; Liu, Yushuo
通讯作者	Zhang, YL (通讯作者)
发表日期	2020
EISSN	2072-4292
卷号	12 期号:6
英文摘要	Downward surface shortwave radiation (DSSR) is the main energy source for most glacial melting, and Moderate Resolution Imaging Spectroradiometer (MODIS) and Landsat Thematic Mapper (TM) data have been used extensively in the inversion of input parameters for estimating DSSR. However, for valley glaciers under complex climatic conditions, the values of MODIS atmospheric products, especially aerosol products, are often invalid, and TM images are always saturated with snow. Furthermore, an estimation model based on optical satellite images must simultaneously consider terrain and atmospheric effects and the transient nature of ice/snow albedo. Based on a high-resolution (12 m) digital elevation model (DEM), the newly launched Sentinel-2 satellites, rather than MODIS and TM, were used to provide input data for our published mountain radiation scheme in a valley glacier. Considering Laohugou Glacier No. 12 as the study area, 62 typical Sentinel-2 scenes were selected and spatiotemporal DSSR variations on the glacier surface were obtained with a 10 m spatial resolution during a mass-balance year from September 2017 to August 2018. Ground-based measurements on 52 clear-sky days were used for validation and the mean bias error (MBE = -16.0 W/m(2)) and root-mean-square difference (RMSD = 73.6 W/m(2)) were relatively low. The results confirm that DSSR is affected mainly by the solar zenith angle and atmospheric attenuation in flat areas of valley glaciers, while in areas with complex terrain, the DSSR received by the glacier surface is affected primarily by the terrain and ice/snow albedo, which exhibits very high spatial heterogeneity.
关键词	SURFACE-ENERGY-BALANCE WESTERN QILIAN MOUNTAINS MASS-BALANCE CLIMATE RESPONSE SPATIAL-DISTRIBUTION KENYA GLACIERS ABLATION ZONE NARROW-BAND MODEL ALBEDO
英文关键词	Solar shortwave radiation; radiative transfer model; topographic factors; DEM; albedo
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000526820600029
来源期刊	REMOTE SENSING
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/259686
推荐引用方式 GB/T 7714	Zhang, Yanli,Qin, Xiang,Li, Xin,et al. Estimation of Shortwave Solar Radiation on Clear-Sky Days for a Valley Glacier with Sentinel-2 Time Series[J]. 中国科学院青藏高原研究所,2020,12(6).
APA	Zhang, Yanli,Qin, Xiang,Li, Xin,Zhao, Jun,&Liu, Yushuo.(2020).Estimation of Shortwave Solar Radiation on Clear-Sky Days for a Valley Glacier with Sentinel-2 Time Series.REMOTE SENSING,12(6).
MLA	Zhang, Yanli,et al."Estimation of Shortwave Solar Radiation on Clear-Sky Days for a Valley Glacier with Sentinel-2 Time Series".REMOTE SENSING 12.6(2020).