碩士 / 國立臺灣大學 / 大氣科學研究所 / 93 / Based on the analysis of TRMM/TMI Sea Surface Temperature (SST) and QuikSCAT ocean surface wind vector, significant weakening of surface wind speed over typhoon-induced cold SST patches has been identified (Lin et al. 2003). The purpose of this study is to design numerical experiments to examine the above mechanism on the modulation of the surface wind from the typhoon-induced sea surface temperature cooling.
It is shown that the surface wind simulation is much improved with the use of the TMI-derived SST as the boundary condition. More detailed analysis of the model results indicates that the boundary layer is more stable over cool SST patches, while being well mixed at the surrounding region. The surface heat fluxes are much smaller under the cool SST condition. The momentum budget indicates that the vertical mixing and pressure gradient are the dominating terms in affecting the evolution of the boundary layer wind, while the vertical mixing acts as a frictional drag on the pressure-gradient-driven winds.
| Identifer | oai:union.ndltd.org:TW/093NTU05022007 |
| Date | January 2005 |
| Creators | Ju-Hsin Wang, 王如馨 |
| Contributors | 吳俊傑 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 64 |
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