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大气科学  2014 

海温及海浪对台风眼墙中尺度涡的影响

DOI: 10.3878/j.issn.1006-9895.1404.13282

Keywords: 耦合系统,台风,风垂直切变,中尺度涡

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Abstract:

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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