| 双台风生消过程涡旋能量、水汽输送相互影响的三维物理图像 |
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| 引用本文： | 徐洪雄,徐祥德,陈斌,陈联寿,朱复成.双台风生消过程涡旋能量、水汽输送相互影响的三维物理图像[J].气象学报,2013,71(5):825-838. |
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| 作者姓名： | 徐洪雄 徐祥德 陈斌 陈联寿 朱复成 |
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| 作者单位： | 南京信息工程大学, 南京, 210044;中国气象科学研究院灾害天气国家重点实验室, 北京, 100081;中国气象科学研究院灾害天气国家重点实验室, 北京, 100081;中国气象科学研究院灾害天气国家重点实验室, 北京, 100081;南京信息工程大学, 南京, 210044 |
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| 基金项目： | 国家重点基础研究发展计划项目(2009CB421504)和国家自然科学基金面上项目 (41075037)。 |
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| 摘 要： | 重点研究“莫拉克”台风发展并登陆台湾,以及“天鹅”台风消亡阶段两者相互作用的问题。通过诊断分析发现“莫拉克”与“天鹅”移动过程存在双台风涡旋互旋、吸引与合并现象。采用双台风中心连线的垂直剖面移动坐标分析法可揭示出双台风涡度、风场三维结构,演变过程中双台风的涡度、动能强度呈反向变化关系,在双台风生消过程中,动能、位涡场分布存在显著“连体”通道特征。并揭示出双台风涡旋各自生、消过程水汽、动能可能存在的相互影响及其涡旋结构变化的内在关联。对“天鹅”消亡、“莫拉克”引发暴雨过程,采用Flexpart-WRF耦合模式模拟“质点群”轨迹,模拟结果再现了双台风生消阶段“天鹅”台风水汽“粒子群”向“莫拉克”低层气旋式输入通道,且在“莫拉克”涡旋高层反气旋式卷出的三维立体动态图像。通过剔除“天鹅”台风涡旋数值模拟试验进一步印证了“天鹅”台风趋于消弱过程其水汽、动能输送为“莫拉克”台风发展与维持做出了一定贡献。基于以上合成分析、轨迹和数值模拟技术综合分析提出了能揭示“天鹅”消亡、“莫拉克”发展过程能量、水汽输送相互影响的三维物理图像。
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| 关 键 词： | 双台风相互作用 水汽通道 轨迹 三维结构 |
| 收稿时间： | 2012/12/10 0:00:00 |
| 修稿时间： | 2013/3/29 0:00:00 |
The structure change and energy moisture transport physical image in the development and decay processes of binary typhoon vortices |
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| XU Hongxiong,XU Xiangde,CHEN Bin,CHEN Lianshou and ZHU Fucheng.The structure change and energy moisture transport physical image in the development and decay processes of binary typhoon vortices[J].Acta Meteorologica Sinica,2013,71(5):825-838. |
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| Authors: | XU Hongxiong XU Xiangde CHEN Bin CHEN Lianshou and ZHU Fucheng |
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| Institution: | Nanjing University of Information Science and Technology, Nanjing 210044, China;State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | A possible mechanism responsible for the exceptional rainfall over Taiwan by Typhoon Morakot (2009) (named Morakot simply here after) was explored by the means of the investigation of the binary typhoon vortices (BTV) interaction. The analysis of the three-dimensional thermal-dynamic structure revealed that there is substantial moisture, energy transport from Typhoon Goni (2009) to Morakot. The inherent correlation between the two vortex respective development and decay is also obvious, indicating aoccurrence of mutually rotating. The dynamic vertical structure of the two vortexes presents an opposite tendency, namely, the intensity of Typhoon Goni vortex becomes weaker and asymmetric with the time elapsed, which is in contrast to the continuous development of "Morakot" during the period of the BTV interaction. However, the horizontal structure of energy and potential vorticity distribution of the two vortexes is characterized by obvious connecting body transportation. A significant moisture transport channel from Typhoon Goni to Morakot can be deduced from the further analysis of the correlation between the satellite blackbody temperature (TBB) over the Taiwan areas and the moisture column flux around its surrounding areas. Using the trajectories model Flexpart coupling with a mesoscale weather forecasting model WRF, we reproduced this moisture transport pathway by the backward tracking of majority of air parcels initialized over the cores of Goni. In addition, the numerical simulation experiments with the Goni vortex being removed or not further confirmed that the moisture and energy transportation from Goni is one of the key factors for the development and maintenance of Morakot. Based on the above data diagnosis, trajectory analysis and numerical simulation, a three-dimensional image of BTV interaction is provided to describe the energy, moisture transport of BTV, and the development and decay of BTV. |
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| Keywords: | Interaction between binary typhoon vortices Moisture transport channel Trajectory Three-dimensional structure |
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