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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhu, Xiande Wang, Qi Fu, Gang Liu, Yulong Tian, Ying |
| Copyright Year | 2011 |
| Abstract | In this study, the fifth-generation Pennsylvania State University-National Center for Atmospheric Research (PSU-NCAR) Mesoscale Model (MM5) is used to simulate Typhoon Mindulle (2004) at high resolution (3-km grid size). The data from measurements show that in the upper atmosphere the existence of an upper jet is important to the transition cyclone. When Mindulle moved to the area of the upper jet entrance, where high-altitude divergence existed, the pumping of the high-altitude divergence would enhance the vertical motion and low-level cyclone convergence. The enhanced vertical motion was confirmed by the simulation results and indicated that the existence of upper divergence enhanced the vertical motion which was favorable for the maintenance of Typhoon Mindulle. The process of extratropical transition (ET) and re-intensification always accompanies the process of cold air invasion. This process enhances the baroclinicity of the atmosphere and the formation of front at high altitudes, which converts baroclinic potential energy into kinetic energy and strengthens the cyclone vortex. The distributions of equivalent potential temperature (θ $_{ e }$) and temperature anomalies show that the warm-core of the typhoon at the tropopause aids the re-intensification of the system. As the typhoon reenters the ocean, latent heat flux (LHF) increases in the north and west and the strong reflectivity and vertical motion occur in the east and southeast, and the west. With the re-intensification of the typhoon the wind field evolves from an oval to a circle at the lower atmosphere, the area coverage by high winds increases, and the distribution of the tangential wind shows an asymmetric pattern. |
| Starting Page | 197 |
| Ending Page | 209 |
| Page Count | 13 |
| File Format | |
| ISSN | 16725182 |
| Journal | Journal of Ocean University of China |
| Volume Number | 10 |
| Issue Number | 3 |
| e-ISSN | 19935021 |
| Language | English |
| Publisher | SP Science Press |
| Publisher Date | 2011-07-27 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | typhoon landfalling extratropical transition re-intensification westerly trough upper level jet Oceanography |
| Content Type | Text |
| Resource Type | Article |
| Subject | Oceanography Ocean Engineering |
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