| 利用位涡趋势法诊断台风“莫拉克”(2009)的移动 |
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| 引用本文： | 吴玉琴,吴立广,梁佳. 利用位涡趋势法诊断台风“莫拉克”(2009)的移动[J]. , 2015, 73(2): 236-246 |
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| 作者姓名： | 吴玉琴 吴立广 梁佳 |
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| 作者单位： | 南京信息工程大学太平洋台风研究中心, 南京, 210044;中国卫星海上测控部, 江阴, 214431,南京信息工程大学太平洋台风研究中心, 南京, 210044,南京信息工程大学太平洋台风研究中心, 南京, 210044 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2013CB430103)、国家自然科学基金项目(41275093)。 |
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| 摘 要： | 位涡趋势(PVT)法可以计算非绝热加热等物理过程对台风移动的直接影响(非引导效应)。在成功模拟2009年第8号台风“莫拉克”移动路径和近地面最大风速的基础上,进一步考虑了台风不对称环流发展的影响,对原有的位涡趋势诊断法进行了改进,并首次将该方法应用于高分辨率数值模式模拟结果中,诊断不同物理过程对“莫拉克”移动的影响。分析表明,虽然非绝热加热等物理过程主要作用于维持台风“莫拉克”的垂直结构,但非绝热加热等物理过程引起的非引导效应也对“莫拉克”移动的短时振荡有重要作用。
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| 关 键 词： | 位涡倾向 台风移动 引导气流 非绝热加热 |
Diagnosis of the movement of Typhoon Morakot (2009) using the potential vorticity tendency approach |
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| WU Yuqin,WU Liguang and LIANG Jia. Diagnosis of the movement of Typhoon Morakot (2009) using the potential vorticity tendency approach[J]. Acta Meteorologica Sinica, 2015, 73(2): 236-246 |
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| Authors: | WU Yuqin WU Liguang LIANG Jia |
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| Affiliation: | Nanjing University of Information Science & Technology, Pacific Typhoon Research Center, Nanjing 210044, China;China Satellite Maritime Tracking & Controlling Department, Jiangyin 214431, China,Nanjing University of Information Science & Technology, Pacific Typhoon Research Center, Nanjing 210044, China and Nanjing University of Information Science & Technology, Pacific Typhoon Research Center, Nanjing 210044, China |
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| Abstract: | The potential vorticity tendency (PVT) approach can quantitatively estimate the direct contribution of diabatic heating and other physical processes (the non-steering effect) to tropical cyclone (TC) movement. Through the numerical simulation of Typhoon Morakot (2009), the original PVT diagnostic method is improved by including the development of TC asymmetric circulation, and then first uses the approach in the high resolution numerical model results to analyze the impact of different physical processes on the movement of Morakot (2009). The results reveal that although diabatic heating mainly plays a role in maintaining the vertical structure of Morakot, its non-steering effect is important to the short-term oscillations of the movement of Morakot. |
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| Keywords: | Potential vorticity tendency Typhoon movement Steering flow Diabatic heating |
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