一次暴雨激发平流层重力波的卫星观测与数值模拟

孙睿; 姚志刚; 韩志刚; 赵增亮; 崔新东; 严卫

doi:10.11728/cjss2018.04.469

一次暴雨激发平流层重力波的卫星观测与数值模拟

doi: 10.11728/cjss2018.04.469

1. 中国人民解放军91954部队永州 425000;
2. 北京应用气象研究所北京 100029;
3. 国防科技大学气象海洋学院南京 211100

基金项目:

国家自然科学基金项目（41575031）和中国博士后基金项目（2015M580124）共同资助

详细信息

作者简介:
孙睿,E-mail:429661225@qq.com

中图分类号: P403
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- 被引次数: 0
出版历程
- 收稿日期: 2017-09-04
- 修回日期: 2018-03-05
- 刊出日期: 2018-07-15

Numerical Simulation of Stratospheric Gravity Waves Induced by a Rainstorm

1. No. 91954 Troops of PLA Yongzhou 425000;
2. Beijing Institute of Applied Meteorology Beijing 100029;
3. Institute of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101

摘要

摘要: 针对卫星Aqua/AIRS观测到的与2011年7月25日山东省乳山市特大暴雨相伴的一次平流层重力波过程，利用中尺度数值模式WRF进行暴雨诱发平流层重力波的数值模拟.对模式输出的垂直速度场和温度扰动场的分析表明，暴雨在平流层内的弧状波结构主要集中在降水云系东侧，水平影响范围大于1000km，且随着高度的增加，圆弧状结构趋于闭合，波动能量显著增强.此外，对垂直速度剖面结构分析表明，受高空东风和风切变的影响，重力波在上传过程中逆着背景风场向东传输，不同高度波动形态各异.基于快速傅里叶变换（FFT）的功率谱分析结果表明，此次暴雨激发的平流层重力波在35km高度的周期为7~20h，水平波长约为1000km，垂直波长为5~10km.通过分析动量通量的垂直输送，定量反映出重力波上传过程中的动力学变化特征.
- 平流层 /
- 重力波 /
- 中尺度天气预报模式 /
- 数值模拟
Abstract: In order to analyze the characteristics of the deep convection-induced stratospheric gravity waves in Chinese continental region, a stratospheric gravity wave process, which is observed by the satellite Aqua/AIRS and accompanied with the heavy rainstorm process on July 25th, 2011 in Rushan, is simulated using the mesoscale numerical WRF (Weather Research and Forcasting) model. The analysis of the vertical velocity field and the temperature disturbance field of the mode output show that the structure of the torrential wave in the stratosphere is mainly concentrated in the east of the precipitation cloud system, and the horizontal influence range is more than 1000km. With the increase of the height, the structure of the torrential wave tends to close, and the wave energy is also significantly enhanced. The results of power spectrum analysis based on Fast Fourier Transform (FFT) show that the stratospheric gravity wave induced by the storm at 35km has the horizontal wavelength of about 1000km and the vertical wavelength of 5~10km. Finally, the parameterized forcing in gravity wave uploading process is quantifiably reflected by analyzing the vertical transport of momentum flux reflects.
- Stratosphere /
- Gravity waves /
- Weather Research and Forcasting (WRF) model /
- Numerical simulation

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