Volume 38 Issue 4
Jul.  2018
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SUN Rui, YAO Zhigang, HAN Zhigang, ZHAO Zengliang, CUI Xindong, YAN Wei. Numerical Simulation of Stratospheric Gravity Waves Induced by a Rainstorm[J]. Journal of Space Science, 2018, 38(4): 469-481. doi: 10.11728/cjss2018.04.469
Citation: SUN Rui, YAO Zhigang, HAN Zhigang, ZHAO Zengliang, CUI Xindong, YAN Wei. Numerical Simulation of Stratospheric Gravity Waves Induced by a Rainstorm[J]. Journal of Space Science, 2018, 38(4): 469-481. doi: 10.11728/cjss2018.04.469

Numerical Simulation of Stratospheric Gravity Waves Induced by a Rainstorm

doi: 10.11728/cjss2018.04.469
  • Received Date: 2017-09-04
  • Rev Recd Date: 2018-03-05
  • Publish Date: 2018-07-15
  • 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.

     

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