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气象:2015,41(6):727-737
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台风莫拉克动力结构的高分辨率数值模拟及诊断分析
(1.国家气象中心,北京 100081;2.中国科学院大气物理研究所,北京 100029;3.中国气象科学研究院灾害天气国家重点实验室,北京 100081)
High Resolution Numerical Simulations and Diagnostic Analysis of Typhoon Morakot
(1.National Meteorological Centre, Beijing 100081;2.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;3.State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081)
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投稿时间:2015-09-05    修订日期:2015-01-23
中文摘要: 本文利用中尺度非静力数值模式WRF对2009年8号台风莫拉克进行了高分辨率数值模拟,模拟过程采用三重嵌套,最高分辨率为2 km,共积分72 h(3 d)。对实际观测资料与模式模拟结果进行了细致对比和验证分析,结果表明,“莫拉克”台风的发展演变以及登陆过程得到了较好模拟再现,模拟的台风路径与观测路径较为一致,同时“莫拉克”台风的强度演变过程以及主要的雷达回波特征也有较好再现。利用物理量广义波作用密度因子对“莫拉克”引发的暴雨过程进行诊断分析,结果表明,波作用密度的异常值区始终伴随着降水区的发展而起伏变化,两者在水平分布和时间演变趋势上都较为相似,表明“莫拉克”台风降水活动受波动影响明显,广义波作用密度能够综合表征莫拉克台风降水系统动力场和热力场扰动的典型垂直结构,对强降水落区有较好的指示作用。
Abstract:By using non hydrostatic WRF model, we did high resolution numerical simulation on the landfall process of Typhoon Morakot in this paper. The simulation, is triple nested with the highest resolution of 2 km, integrated 72 h (3 d). We also carried out careful comparison between the simulation result and the observation data. The result shows that WRF model successfully simulates the development and landing process of Typhoon Morakot, and the simulated path is quite consistent with the observation. At the same time, the model also successfully shows the evolving process and the feature of main radar echoes in the whole simulating period. Furthermore, with the high resolution simulation data we carried out diagnostic analysis on the landing process of Typhoon Morakot with the generalized wave activity density M. The result shows that the abnormal values of wave action density M always cover the observed precipitation regions horizontal distribution and temporal evolution are quite similar.
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基金项目:国家重点基础研究发展计划(973计划)(2015CB452804),中国气象科学研究院灾害天气国家重点实验室开放课题(2013LASW A06),国家自然科学基金面上项目(41375052)和国家自然科学基金青年科学基金项目(41405049)共同资助
引用文本:
周冠博,冉令坤,高守亭,李娜,2015.台风莫拉克动力结构的高分辨率数值模拟及诊断分析[J].气象,41(6):727-737.
ZHOU Guanbo,RAN Lingkun,GAO Shouting,LI Na,2015.High Resolution Numerical Simulations and Diagnostic Analysis of Typhoon Morakot[J].Meteor Mon,41(6):727-737.