气候变化领域集成服务门户(CCPortal): Evaluation of Precipitable Water Vapor from Four Satellite Products and Four Reanalysis Datasets against GPS Measurements on the Southern Tibetan Plateau

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DOI	10.1175/JCLI-D-16-0630.1
	Evaluation of Precipitable Water Vapor from Four Satellite Products and Four Reanalysis Datasets against GPS Measurements on the Southern Tibetan Plateau
	Wang, Yan; Yang, Kun; Pan, Zhengyang; Qin, Jun; Chen, Deliang; Lin, Changgui; Chen, Yingying; Lazhu; Tang, Wenjun; Han, Menglei; Lu, Ning; Wu, Hui
通讯作者	Yang, K (通讯作者)
发表日期	2017
ISSN	0894-8755
EISSN	1520-0442
起始页码	5699
结束页码	5713
卷号	30 期号:15
英文摘要	The southern Tibetan Plateau (STP) is the region in which water vapor passes from South Asia into the Tibetan Plateau (TP). The accuracy of precipitable water vapor (PWV) modeling for this region depends strongly on the quality of the available estimates of water vapor advection and the parameterization of land evaporation models. While climate simulation is frequently improved by assimilating relevant satellite and reanalysis products, this requires an understanding of the accuracy of these products. In this study, PWV data from MODIS infrared and near-infrared measurements, AIRS Level-2 and Level-3, MERRA, ERA-Interim, JRA-55, and NCEP final reanalysis (NCEP-Final) are evaluated against ground-based GPS measurements at nine stations over the STP, which covers the summer monsoon season from 2007 to 2013. The MODIS infrared product is shown to underestimate water vapor levels by more than 20% (1.84 mm), while the MODIS near-infrared product overestimates them by over 40% (3.52 mm). The AIRS PWV product appears to be most useful for constructing high-resolution and high-quality PWV datasets over the TP; particularly the AIRS Level-2 product has a relatively low bias (0.48 mm) and RMSE (1.83 mm) and correlates strongly with the GPS measurements (R = 0.90). The four reanalysis datasets exhibit similar performance in terms of their correlation coefficients (R = 0.87-0.90), bias (0.72-1.49 mm), and RMSE (2.19-2.35 mm). The key finding is that all the reanalyses have positive biases along the PWV seasonal cycle, which is linked to the well-known wet bias over the TP of current climate models.
关键词	DIURNAL-VARIATION CLIMATE RADIOSONDE RAINFALL SYSTEM CYCLE TEMPERATURE RETRIEVALS RADIATION TRANSPORT
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000405470400006
来源期刊	JOURNAL OF CLIMATE
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/259068
推荐引用方式 GB/T 7714	Wang, Yan,Yang, Kun,Pan, Zhengyang,et al. Evaluation of Precipitable Water Vapor from Four Satellite Products and Four Reanalysis Datasets against GPS Measurements on the Southern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2017,30(15).
APA	Wang, Yan.,Yang, Kun.,Pan, Zhengyang.,Qin, Jun.,Chen, Deliang.,...&Wu, Hui.(2017).Evaluation of Precipitable Water Vapor from Four Satellite Products and Four Reanalysis Datasets against GPS Measurements on the Southern Tibetan Plateau.JOURNAL OF CLIMATE,30(15).
MLA	Wang, Yan,et al."Evaluation of Precipitable Water Vapor from Four Satellite Products and Four Reanalysis Datasets against GPS Measurements on the Southern Tibetan Plateau".JOURNAL OF CLIMATE 30.15(2017).