【摘 要】
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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 successfull
【机 构】
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Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China“,”University of
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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.
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