气候变化领域集成服务门户(CCPortal): Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings

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DOI	10.2151/jmsj.2012-C06
	Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings
	Qin, Jun; Yang, Kun; Koike, Toshio; Lu, Hui; Ma, Yaoming; Xu, Xiangde
通讯作者	Qin, J (通讯作者)
发表日期	2012
ISSN	0026-1165
EISSN	2186-9057
起始页码	87
结束页码	98
卷号	90C
英文摘要	The Atmospheric Infrared Sounder (AIRS) on board the Aqua satellite provides the estimate of precipitable water vapor (PWV), which can be assimilated into numerical prediction models to improve precipitation forecasts. In this study, the AIRS retrieval of PWV is evaluated against ground-based GPS measurements at 24 stations over the Tibetan Plateau (TP) and its surroundings. First, the PWV estimates from the GPS delay signals at these stations are improved by applying a new scheme for computing the water-vapor-weighted mean atmosphere temperature, a key parameter in the GPS PWV retrieval. Compared with a traditional retrieval, this revision can improve the PWD estimate by up to 6% in some cases. Second, the newly retrieved PWV data are used to evaluate the AIRS product. Prior to the evaluation, an elevation correction is made to these GPS PWV data to account for the elevation difference between the GPS stations and the corresponding AIRS footprints. This correction effectively removed false negative biases in the AIRS product. Nevertheless, an average negative bias of 2 mm still exists in the AIRS product. A further analysis suggests that the negative bias may be attributed to the cloud-clearing algorithm in the AIRS retrieval scheme.
关键词	VALIDATION RADIOSONDE METEOROLOGY AIRS/AMSU/HSB RETRIEVALS RADIATION NETWORK SURFACE
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000310557100007
来源期刊	JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN
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/258042
推荐引用方式 GB/T 7714	Qin, Jun,Yang, Kun,Koike, Toshio,et al. Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings[J]. 中国科学院青藏高原研究所,2012,90C.
APA	Qin, Jun,Yang, Kun,Koike, Toshio,Lu, Hui,Ma, Yaoming,&Xu, Xiangde.(2012).Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings.JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN,90C.
MLA	Qin, Jun,et al."Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings".JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN 90C(2012).