Volume 37 Issue 1
Jan.  2017
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CHEN Linxiang, YANG Guotao, WANG Jihong, CHENG Xuewu, YUE Chuan. Measurements of Lower Mesosphere Inversion Layers with Rayleigh Lidar over Beijing[J]. Journal of Space Science, 2017, 37(1): 75-81. doi: 10.11728/cjss2017.01.075
Citation: CHEN Linxiang, YANG Guotao, WANG Jihong, CHENG Xuewu, YUE Chuan. Measurements of Lower Mesosphere Inversion Layers with Rayleigh Lidar over Beijing[J]. Journal of Space Science, 2017, 37(1): 75-81. doi: 10.11728/cjss2017.01.075

Measurements of Lower Mesosphere Inversion Layers with Rayleigh Lidar over Beijing

doi: 10.11728/cjss2017.01.075
  • Received Date: 2015-12-16
  • Rev Recd Date: 2016-07-20
  • Publish Date: 2017-01-15
  • By using the measurement data of Rayleigh Lidar located in Yanqing, Beijing (40.47°N, 115.97°E) during the period from January to February 2012 and from May 2012 to April 2013, statistic characteristics of lower Mesosphere Inversion Layers (MIL) occurring between 60 and 80km altitude over North China have been reported. The occurrence of lower MIL in Beijing was found to be 65% in this period. The mean bottom/top height was 68.2km (73.0km) and mean thickness was 4.8km. 47 inversion events propagated downward while 12 inversion events propagated upward in 91 lower MIL events. Notably, 3 double lower MIL events vertically propagated in quite different speed and direction. During the double lower MIL on 17 May 2012, the upper MIL and the lower MIL propagated downward with vertical speed of 610m·h-1 and 460m·h-1 respectively. And during the double lower MIL observed on 8 February 2013, the upper spread propagated upward while the lower spread propagated downward with vertical speed of 512m·h-1 and 263m·h-1 respectively. However, during the double lower-MIL on 18 February 2013, the lower MIL was spreading downward with a speed of 1300m·h-1 with inversion amplitude increasing. After the amplitude reached its maximum value, a weak shallow upper-MIL was split out from the MIL. All these are analyzed in detail.

     

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