Monsoonal Influence on Typhoon Morakot (2009). Part II: Numerical Study
Monsoonal Influence on Typhoon Morakot (2009). Part II: Numerical Study
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DOI：
10.1175/2011jas3731.1
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发表时间：
2011-10
影响因子：
3.1
通讯作者：
Jia-yi Liang;Liguang Wu;Xuyang Ge;Chun‐Chieh Wu
中科院分区：
文献类型：
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作者：
Jia-yi Liang;Liguang Wu;Xuyang Ge;Chun‐Chieh Wu
摘要本研究第二部分通过数值实验研究了多时间尺度季风气流对莫拉克台风（2009）路径变化的影响。虽然控制模拟捕获了台湾岛附近的缓慢北偏、高度不对称的降雨结构和相关的降雨模式，但敏感性实验表明，登陆台湾前的西移和随后台湾附近的北移与莫拉克和多时间尺度季风流的相互作用密切相关。在登陆台湾之前，莫拉克受天气波列的影响，直接向西向台湾移动，该天气波列由中国大陆上空的戈尼、莫拉克和北太平洋西部上空的气旋组成，莫拉克以西有一个反气旋。数值模拟结果表明，莫拉克与反气旋之间的强烈北风减弱了向北移动的气流。
AbstractIn the second part of this study, numerical experiments are conducted to investigate the influences of multi-time-scale monsoonal flows on the track change of Typhoon Morakot (2009). While the control simulation captures the slowing and northward deflections in the vicinity of Taiwan Island, the highly asymmetric rainfall structure, and the associated rainfall pattern, sensitivity experiments suggest that the westward movement prior to the landfall on Taiwan and the subsequent northward shifts in the vicinity of Taiwan were closely associated with the interaction between Morakot and multi-time-scale monsoonal flows.Prior to the landfall on Taiwan, Morakot moved westward directly toward Taiwan because of a synoptic wave train–like pattern, which consisted of Goni over mainland China, Morakot, and a cyclone over the western North Pacific with an anticyclone to the west of Morakot. Numerical simulation suggests that strong northerly winds between Morakot and the anticyclone reduced the northward stee...