| 海温及海浪对台风眼墙中尺度涡的影响 |
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| 引用本文： | 刘磊,费建芳,黄小刚,程小平,马占宏.海温及海浪对台风眼墙中尺度涡的影响[J].大气科学,2014,38(6):1172-1184. |
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| 作者姓名： | 刘磊 费建芳 黄小刚 程小平 马占宏 |
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| 作者单位： | 解放军理工大学气象海洋学院, 南京211101 |
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| 基金项目： | 国家公益性行业(气象)科研专项GYHY201106004,国家自然科学基金项目41005029、41105065、41305045,国家自然科学基金重点项目41230421 |
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| 摘 要： | 本文利用包括海气耦合、气浪耦合及浪流耦合的完全耦合系统,着重研究了2006年“格美”(Kaemi)台风眼墙内的中尺度涡结构。中尺度涡作为影响台风眼墙非对称结构的内部因子,与风垂直切变密切相关,其发展过程受台风下垫面海洋状况的影响。在顺切变右侧,垂直气流逐渐增强,在顺切变左侧达到最大后逐渐减弱。当不考虑海表温度的冷涌反馈作用时,海气间的热通量输送较大,由此引起眼墙内的中尺度对流加强,但集中爆发区仍然位于顺切变方向,不受热通量输送变化的影响。当不考虑海浪对海表粗糙度的影响时,在较小的海表粗糙度条件下,眼墙非对称性减弱,使得中尺度对流涡在切向方向上的分布较为均匀。
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| 关 键 词： | 耦合系统 台风 风垂直切变 中尺度涡 |
| 收稿时间： | 2013/10/12 0:00:00 |
| 修稿时间： | 2014/4/28 0:00:00 |
The Influence of Sea Surface Temperature and Waves on Mesoscale Vortices in Typhoon Eyewalls |
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| LIU Lei,FEI Jianfang,HUANG Xiaogang,CHENG Xiaoping and MA Zhanhong.The Influence of Sea Surface Temperature and Waves on Mesoscale Vortices in Typhoon Eyewalls[J].Chinese Journal of Atmospheric Sciences,2014,38(6):1172-1184. |
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| Authors: | LIU Lei FEI Jianfang HUANG Xiaogang CHENG Xiaoping and MA Zhanhong |
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| Institution: | Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing 211101 |
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| Abstract: | A fully-coupled system including air-sea interaction, air-wave interaction and wave-current interaction has been developed to focus on the structure of mesoscale vortices in the eyewall of typhoon ‘Kaemi’ (2006). Mesoscale vortices are one type of interior factors influencing the asymmetry of typhoon eyewall; they are closely related to vertical wind shear (VWS) and are impacted by the underlying sea status. Updraught develops on the downshear right and gradually weakens after it reaches its strongest level on the downshear left. Excluding the response of sea surface temperature (SST), larger heat fluxes at the air-sea interface induce the intensification of convection in the typhoon eyewall; however, the region with the most convection still lies on the downshear of the VWS, which is not significantly influenced by the magnitude of heat fluxes at the air-sea interface. In the calculation of sea surface roughness without the effect of waves, the asymmetry of the eyewall weakens, and mesoscale vortices distribute uniformly in the azimuthal direction above a shorter sea surface roughness. |
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| Keywords: | Coupled system Typhoon Vertical wind shear Mesoscale vortex |
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