| 非对称台风风场的动力初始化应用研究 |
| |
| 引用本文： | 王 亮,陆汉城,潘晓滨,张 云.非对称台风风场的动力初始化应用研究[J].气象科学,2009,29(6):720-726. |
| |
| 作者姓名： | 王 亮 陆汉城 潘晓滨 张 云 |
| |
| 作者单位： | 解放军理工大学气象学院,南京,211101 |
| |
| 基金项目： | 国家重点基础研究与发展研究基金，国家自然科学基金重点项目 |
| |
| 摘 要： | 在对比NCAR-AFWA三维Bogus(虚拟)风场及风压场方案的基础上,虚拟台风模型中的水平风场采用考虑台风移速、移向、摩擦等客观因素的非对称方案,垂直风场采用考虑高空反气旋环流的风廓线方案,然后利用Nudging动力初始化技术形成新的模式初始场.最后对"云娜"台风进行数值模拟,结果表明:通过合理引入客观因子及观测事实对台风Bogus模型进行构建,并利用同化方法使各个物理量相互协调,可以使初始场与实况更加接近,从而在一定程度上提高台风路径及强度的预报水平,并对降水分布的预报效果也有所改善.
|
| 关 键 词： | 虚拟台风方案 非对称风场 Nudging动力初始化 |
| 收稿时间： | 2008/8/29 0:00:00 |
Research on dynamic initialization of the asymmetric typhoon wind field |
| |
| Wang Liang,Lu Hancheng,Pan Xiaobin and Zhang Yun.Research on dynamic initialization of the asymmetric typhoon wind field[J].Scientia Meteorologica Sinica,2009,29(6):720-726. |
| |
| Authors: | Wang Liang Lu Hancheng Pan Xiaobin and Zhang Yun |
| |
| Institution: | Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China;Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China;Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China;Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China |
| |
| Abstract: | This paper, on the basis of the comparing the three-dimensional bogus wind and wind-pressure relation of the NCAR-AFWA scheme, adopts the asymmetric horizontal wind scheme in terms of the moving speed, direction and friction and other objective factors, and selects the vertical wind profile scheme in terms of the upper anticyclone structure, and then forms the model initial field by dynamic nudging technology. Finally, the results of the typhoon Rananim simulation have shown that, by introducing objective factors and observing facts into constructing bogus model,the initial field, in which the assimilation technology makes physical fields more harmonic, can be closer to the observing, and then can lead to better results of the track, intension and the rain distribution. |
| |
| Keywords: | Typhoon bogus scheme Asymmetric wind field Nudging dynamic initialization |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《气象科学》浏览原始摘要信息 |
| 点击此处可从《气象科学》下载免费的PDF全文 |
|
