Knowledge management system National Space Science Center,CAS
| 3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field | |
| Song, S. L.; Zhu, W. Y.; Ding, J. C.; Peng, J. H.; 北京8701信箱 | |
| Department | 其他 |
| Source Publication | Chinese Science Bulletin
 |
| 2006 | |
| Volume | 51Issue:5Pages:607-614 |
| ISSN | 1001-6538 |
| Language | 英语 |
| Keyword | Shanghai Gps Network Gps Slant Water Vapor Tomography 3d Structure Of Water Vapor Robust Estimation Of Variance Component |
| Abstract | 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. |
| Indexed By | SCI |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/1694 |
| Collection | 其他部室 |
| Corresponding Author | 北京8701信箱 |
| Recommended Citation GB/T 7714 | Song, S. L.,Zhu, W. Y.,Ding, J. C.,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, S. L.,Zhu, W. Y.,Ding, J. C.,Peng, J. H.,&北京8701信箱.(2006).3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field.Chinese Science Bulletin,51(5),607-614. |
| MLA | Song, S. L.,et al."3D water-vapor tomography with Shanghai GPS network to improve forecasted moisture field".Chinese Science Bulletin 51.5(2006):607-614. |
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| File Name/Size | DocType | Version | Access | License | ||
| 2006515607.pdf（2228KB） | 开放获取 | CC BY-NC-SA | View Download | |||
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