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	An algorithm for estimating downward shortwave radiation from gms 5 visible imagery and its evaluation over china
	Lu, Ning1,3; Liu, Ronggao; Liu, Jiyuan; Liang, Shunlin2
刊名	Journal of geophysical research-atmospheres
	2010-09-16
卷号	115页码:15
ISSN号	2169-897X
DOI	10.1029/2009jd013457
通讯作者	Lu, ning()
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.
WOS关键词	SURFACE SOLAR-RADIATION ; PHOTOSYNTHETICALLY ACTIVE RADIATION ; NARROW-BAND ; VALIDATION ; SYSTEM ; CLOUDS ; RETRIEVAL ; CLIMATE ; AEROSOL ; MODEL
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000282011600003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2412662
专题	中国科学院大学
通讯作者	Lu, Ning
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 2.Univ Maryland, Dept Geog, College Pk, MD 20742 USA 3.Chinese Acad Sci, Grad Univ, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Lu, Ning,Liu, Ronggao,Liu, Jiyuan,et al. An algorithm for estimating downward shortwave radiation from gms 5 visible imagery and its evaluation over china[J]. Journal of geophysical research-atmospheres,2010,115:15.
APA	Lu, Ning,Liu, Ronggao,Liu, Jiyuan,&Liang, Shunlin.(2010).An algorithm for estimating downward shortwave radiation from gms 5 visible imagery and its evaluation over china.Journal of geophysical research-atmospheres,115,15.
MLA	Lu, Ning,et al."An algorithm for estimating downward shortwave radiation from gms 5 visible imagery and its evaluation over china".Journal of geophysical research-atmospheres 115(2010):15.

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