Volume 39 Issue 3
May  2019
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WANG Yizhou, HUANG Yingying, LI Huijun, LI Chongyin. Analysis of Stratospheric Gravity Wave Parameters Based on COSMIC Observationsormalsize[J]. Journal of Space Science, 2019, 39(3): 326-341. doi: 10.11728/cjss2019.03.326
Citation: WANG Yizhou, HUANG Yingying, LI Huijun, LI Chongyin. Analysis of Stratospheric Gravity Wave Parameters Based on COSMIC Observationsormalsize[J]. Journal of Space Science, 2019, 39(3): 326-341. doi: 10.11728/cjss2019.03.326

Analysis of Stratospheric Gravity Wave Parameters Based on COSMIC Observationsormalsize

doi: 10.11728/cjss2019.03.326
  • Received Date: 2018-05-29
  • Rev Recd Date: 2019-01-04
  • Publish Date: 2019-05-15
  • Using the temperature profiles between 30°N and 40°N latitude observed by COSMIC satellites from 29 December 2006 to 3 January 2008, the disturbances and potential energy (Ep) of Gravity Waves (GWs) in lower stratosphere are calculated by vertical running windows method, double-filter method and single-filter method, respectively. The altitude and longitude distributions, and multi-time scale variations of these parameters are obtained. The spatial characteristics of background temperature and horizontal wind fields are analyzed to investigate the possible origins of GWs. The disturbances and potential energy (Ep) of GWs in lower stratosphere obtained by the above three methods are compared. The results are as follows. The errors of GW perturbations calculated by vertical running windows method are relatively large, because it can only remove the disturbances with large vertical scales, while can not remove small vertical scales in derived GW disturbances. The double-filter can well suppress both large-scale background and small-scale disturbances in temperature profiles. GW disturbances obtained by a single-filter does not include large vertical scale background, but still contain some small vertical scale disturbances. The double-filter method cannot obtain altitude variations of Ep, while the single-filter method can give altitude variations of monthly averaged Ep. The relationships between GWs' parameters (including disturbances and Ep) and background temperature and horizontal wind fields are revealed.

     

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