中国物理B ›› 2018, Vol. 27 ›› Issue (5): 59201-059201.doi: 10.1088/1674-1056/27/5/059201

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

Simulation of a torrential rainstorm in Xinjiang and gravity wave analysis

Rui Yang(杨瑞), Yi Liu(刘毅), Ling-Kun Ran(冉令坤), Yu-Li Zhang(张玉李)   

  1. 1 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2017-09-29 修回日期:2017-12-21 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Ling-Kun Ran E-mail:rlk@mail.iap.ac.cn
  • 基金资助:
    Project supported by China Special Fund for Meteorological Research in the Public Interest (Grant No.GYHY201406002),the National Natural Science Foundation of China (Grant Nos.41575065 and 41405049),the National Natural Science Foundation International Cooperation Project,China (Grant No.41661144024),and Strategic Priority Research Program of Chinese Academy of Sciences (Grant No.XDA17010100).

Simulation of a torrential rainstorm in Xinjiang and gravity wave analysis

Rui Yang(杨瑞)1,2, Yi Liu(刘毅)1, Ling-Kun Ran(冉令坤)1, Yu-Li Zhang(张玉李)1   

  1. 1 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-09-29 Revised:2017-12-21 Online:2018-05-05 Published:2018-05-05
  • Contact: Ling-Kun Ran E-mail:rlk@mail.iap.ac.cn
  • Supported by:
    Project supported by China Special Fund for Meteorological Research in the Public Interest (Grant No.GYHY201406002),the National Natural Science Foundation of China (Grant Nos.41575065 and 41405049),the National Natural Science Foundation International Cooperation Project,China (Grant No.41661144024),and Strategic Priority Research Program of Chinese Academy of Sciences (Grant No.XDA17010100).

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摘要： We used a weather research and forecasting model to simulate a torrential rainstorm that occurred in Xinjiang, China during June 16-17, 2016. The model successfully simulated the rainfall area, precipitation intensity, and changes in precipitation. We identified a clear wave signal using the two-dimensional fast Fourier transform method; the waves propagated westwards, with wavelengths of 45-20 km, periods of 50-120 min, and phase velocities mainly concentrated in the -25 m/s to -10 m/s range. The results of wavelet cross-spectral analysis further confirmed that the waves were gravity waves, peaking at 11:00 UTC, June 17, 2016. The gravity wave signal was identified along 79.17-79.93°E, 81.35-81.45°E and 81.5-81.83°E. The gravity waves detected along 81.5-81.83°E corresponded well with precipitation that accumulated in 1 h, indicating that gravity waves could be considered a rainstorm precursor in future precipitation forecasts.

关键词: gravity wave, rainstorm, spectral analysis methods, weather research and forecasting model

Abstract: We used a weather research and forecasting model to simulate a torrential rainstorm that occurred in Xinjiang, China during June 16-17, 2016. The model successfully simulated the rainfall area, precipitation intensity, and changes in precipitation. We identified a clear wave signal using the two-dimensional fast Fourier transform method; the waves propagated westwards, with wavelengths of 45-20 km, periods of 50-120 min, and phase velocities mainly concentrated in the -25 m/s to -10 m/s range. The results of wavelet cross-spectral analysis further confirmed that the waves were gravity waves, peaking at 11:00 UTC, June 17, 2016. The gravity wave signal was identified along 79.17-79.93°E, 81.35-81.45°E and 81.5-81.83°E. The gravity waves detected along 81.5-81.83°E corresponded well with precipitation that accumulated in 1 h, indicating that gravity waves could be considered a rainstorm precursor in future precipitation forecasts.

Key words: gravity wave, rainstorm, spectral analysis methods, weather research and forecasting model

中图分类号:  (Properties and dynamics of the atmosphere; meteorology)

  • 92.60.-e
92.60.Wc (Weather analysis and prediction) 92.60.jf (Precipitation)