3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field

	3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field
	Song, SL ; Zhu, WY ; Ding, JC ; Peng, JH
刊名	CHINESE SCIENCE BULLETIN
	2006-03-01
卷号	51 期号:5 页码:607-614
关键词	Shanghai GPS network GPS slant water vapor tomography 3D structure of water vapor robust estimation of variance component
英文摘要	The vertical structure of water vapor in atmosphere is one of the initial information of numerical weather forecast model. Because of the strong variation of water vapor in atmosphere and limited spatio-temporal solutions of traditional observation technique, the initial water vapor field of numerical weather forecast model can not accurately be described. At present, using GIPS slant observations to study water vapor profile is very popular in the world. Using slant water vapor(SWV) observations from Shanghai GIPS network,we diagnose the three-dimensional(3D) water vapor structure over Shanghai area firstly in China. In water vapor tomography, Gauss weighted function is used as horizontal constraint, the output of numerical forecast is used as apriori information, and boundary condition is also considered. For the problem without exact apriori weights for observations, estimation of variance components is introduced firstly in water vapor tomography to determine posteriori weights. Robust estimation is chosen for reducing the effect of blunders on solutions. For the descending characteristic of water vapor with height increasing, non-equal weights are used along vertical direction. Comparisons between tomography results and the profile provided by numerical model (MM5) show that the forecasted moisture fields of MM5 can be improved obviously by GPS slant water vapor. Using GIPS slant observations to study 3D structure of atmosphere in near real-time is very important for improving initial water vapor field of short-term weather forecast and enhancing the accuracy of numerical weather forecast.
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
收录类别	SCI
语种	英语
WOS记录号	WOS:000236874400016
公开日期	2010-07-30
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/10026]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100080, Peoples R China 3.Shanghai Weather Observ, Shanghai 200030, Peoples R China 4.Chongqing Univ, Sch Engn & Surveying, Chongqing 400044, Peoples R China
推荐引用方式 GB/T 7714	Song, SL,Zhu, WY,Ding, JC,et al. 3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field[J]. CHINESE SCIENCE BULLETIN,2006,51(5):607-614.
APA	Song, SL,Zhu, WY,Ding, JC,&Peng, JH.(2006).3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field.CHINESE SCIENCE BULLETIN,51(5),607-614.
MLA	Song, SL,et al."3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field".CHINESE SCIENCE BULLETIN 51.5(2006):607-614.