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DOI	10.1029/2019JD030763
	Estimation of Downwelling Shortwave and Longwave Radiation in the Tibetan Plateau Under All-Sky Conditions
	Zhong, Lei; Zou, Mijun; Ma, Yaoming; Huang, Ziyu; Xu, Kepiao; Wang, Xian; Ge, Nan; Cheng, Meilin
通讯作者	Zhong, L (通讯作者)
发表日期	2019
ISSN	2169-897X
EISSN	2169-8996
起始页码	11086
结束页码	11102
卷号	124 期号:21
英文摘要	Downwelling shortwave radiation (DSWR) and downwelling longwave radiation (DLWR) are two important components of the Earth's surface radiation balance. In this study, the Heliosat method and the parameterization of Crawford and Duchon (1999, , hereafter CD99) were calibrated to make them suitable for estimation of DSWR and DLWR over the Tibetan Plateau (TP). Based on meteorological data, forcing data, and observations from polar-orbiting satellites, the cloud albedo was calculated, and the clear-sky index estimation scheme of the Heliosat method was improved. These improvements were then applied to derive 10-day DSWR under all-sky conditions over the TP by combining the clear-sky shortwave radiation scheme with a clear-sky index. The coefficient of the CD99 parameterization scheme clear-sky DLWR was also calibrated, and 10-day all-sky DLWR was then determined and validated using ground-based measurements. The spatiotemporal distributions of DSWR and DLWR were analyzed in detail. The results showed that the modified methods are efficient and applicable for downward radiation retrieval under all-sky conditions over the TP with a reasonable accuracy. The mean percentage errors for DSWR and DLWR were -4.75% and 0.11%, respectively. The variation in the monthly DSWR (DLWR) showed a convex shape, with a maximum appearing in May (July). The spatial distributions of DLWR showed a southeast-high and northwest-low pattern. As the subsolar point moves northward, DSWR increases gradually and is clearly influenced by the Asian summer monsoon.
关键词	SURFACE SOLAR IRRADIANCE GLOBAL IRRADIANCE WAVE-RADIATION TEMPERATURE PARAMETERIZATION REGION MODIS CO SENSITIVITY VALIDATION
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000494920700001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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/259572
推荐引用方式 GB/T 7714	Zhong, Lei,Zou, Mijun,Ma, Yaoming,et al. Estimation of Downwelling Shortwave and Longwave Radiation in the Tibetan Plateau Under All-Sky Conditions[J]. 中国科学院青藏高原研究所,2019,124(21).
APA	Zhong, Lei.,Zou, Mijun.,Ma, Yaoming.,Huang, Ziyu.,Xu, Kepiao.,...&Cheng, Meilin.(2019).Estimation of Downwelling Shortwave and Longwave Radiation in the Tibetan Plateau Under All-Sky Conditions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(21).
MLA	Zhong, Lei,et al."Estimation of Downwelling Shortwave and Longwave Radiation in the Tibetan Plateau Under All-Sky Conditions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.21(2019).