Volume 28 Issue 3
May  2008
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XIAO Cunying, HU Xiong, Gong Jiancun, LIU Jia. Analysis of the Characteristics of the Stratospheric Quasi-zero Wind Layer Over China[J]. Chinese Journal of Space Science, 2008, 28(3): 230-235. doi: 10.11728/cjss2008.03.230
Citation: XIAO Cunying, HU Xiong, Gong Jiancun, LIU Jia. Analysis of the Characteristics of the Stratospheric Quasi-zero Wind Layer Over China[J]. Chinese Journal of Space Science, 2008, 28(3): 230-235. doi: 10.11728/cjss2008.03.230

Analysis of the Characteristics of the Stratospheric Quasi-zero Wind Layer Over China

doi: 10.11728/cjss2008.03.230
  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2008-05-15
  • The characteristics of the stratospheric quasi-zero wind layer and its seasonal and geographic variation features over China are obtained by using the ERA-40 reanalyzed wind data which are provided by ECMWF. Results show that quasi-zero wind layer generally exists at the height range of 18--25 km and some variation of the height of the zero wind line would happen when the time or location change. According to the latitudinal variation of the quasi-zero wind layer, the atmosphere over China could be divided into three parts to discuss its features: low-latitude area (5ºN~20ºN), transition area (20ºN~32.5ºN), middle- and high-latitude area (32.5ºN~55ºN). The quasi-zero wind layer may exist in winter and at the beginning of spring in low-latitude area. In middle-and high-latitude area, the quasi-zero wind layer may be found at the end of spring and in summer. The quasi-zero wind layer in transition area relates to the equatorial quasi-biennial oscillation (QBO). During the easterly phase of QBO, the characteristics of the transition area are similar to that of the middle-latitude area, while during the westerly phase of QBO, its characteristics are similar to that of the low-latitude area. The quasi-zero wind layer varies little with the longitude. The longitudinal variation of the height of zero wind line may not exceed 2 km. However, this variation is relatively larger in the transition area.

     

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