QQ客服 官方微博 反馈留言

	An algorithm for estimating downward shortwave radiation from GMS 5 visible imagery and its evaluation over China
	Lu N. ; Liu R. G. ; Liu J. Y. ; Liang S. L.
	2010
关键词	surface solar-radiation photosynthetically active radiation narrow-band validation system clouds retrieval climate aerosol model
英文摘要	This paper presents an operational scheme to estimate downward shortwave radiation (DSR) over China from the visible-band top-of-atmosphere reflectance of the Geostationary Meteorological Satellite (GMS) 5 imagery. The proposed algorithm retrieves surface reflectance and atmospheric parameters directly from GMS 5 images by searching lookup tables, which are created by the radiative transfer model SBDART and consider the effects of water vapor absorption and surface altitude variations. Experiments show that the DSR retrieval is more sensitive to the selection of aerosol type and less to that of the cloud type. Uncertainty in the reflectance of a bright surface leads to a considerable DSR retrieval error (+/-(6-9%)). The instantaneous retrieved DSR is evaluated by field measurements on the Tibetan Plateau, and the daily retrieved DSR is compared with one year's ground-based measurements at 96 stations in China. The results show that the estimated DSR is in good agreement with ground measurements with a correlation coefficient of similar to 0.9 and a bias of 1.5%. Root-mean square differences in the daily DSR are 17.7% for all-sky and 13.1% for clear-sky conditions. These results suggest that the proposed method applied to the GMS 5 satellite data can accurately estimate temporally and spatially continuous instantaneous and daily DSR. These DSR data sets will be useful for a wide range of applications.
出处	Journal of Geophysical Research-Atmospheres
卷	115
收录类别	SCI
ISSN号	0148-0227
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23356]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Lu N.,Liu R. G.,Liu J. Y.,et al. An algorithm for estimating downward shortwave radiation from GMS 5 visible imagery and its evaluation over China. 2010.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。