Volume 36 Issue 2
Mar.  2016
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TANG Lei, HUANG Chunming. Mid-latitude Planetary Waves Observation from MST Radar Measurements in the Troposphere and Lower Stratosphere[J]. Journal of Space Science, 2016, 36(2): 175-187. doi: 10.11728/cjss2016.02.175
Citation: TANG Lei, HUANG Chunming. Mid-latitude Planetary Waves Observation from MST Radar Measurements in the Troposphere and Lower Stratosphere[J]. Journal of Space Science, 2016, 36(2): 175-187. doi: 10.11728/cjss2016.02.175

Mid-latitude Planetary Waves Observation from MST Radar Measurements in the Troposphere and Lower Stratosphere

doi: 10.11728/cjss2016.02.175
  • Received Date: 2015-06-30
  • Rev Recd Date: 2015-12-28
  • Publish Date: 2016-03-15
  • Characteristics of the Planetary Waves (PW) in the Troposphere and Lower Stratosphere (TLS) were investigated with Mesosphere-Stratosphere-Troposphere (MST) radar wind measurements in Xianghe (116.9°E, 39.8°N) from January 2012 to December 2014. Spectral analyses show that the TLS region is dominated by quasi-16-day and quasi-10-day PW, while the former ones are more significant. In the troposphere regions (above 17km height), the PW with dynamic periods are primarily observed, which last less than three months and don't indicate significant seasonal variation. Meanwhile, the amplitudes of the PW in the zonal direction exceed those in the meridional direction. In the lower stratosphere regions, intense PW mainly occur in the zonal component in winter. The amplitudes in the stratosphere are generally smaller than those in the troposphere. This paper also discusses the propagation characteristics of PW based on MST radar data and MERRA reanalysis data. The result shows that zonal component of the quasi-16-day PW observed in February and March 2014 propagated eastward with a zonal wave number of 2 (the horizontal wave length was about 15324.7km). The corresponding phase velocity was 11.1m·s-1 (positive eastward). The quasi-16-day PW propagated upward vertically with a 64km vertical wave length. In addition, the observation in May 2014 showed that the quasi-10-day PW in the zonal component propagated eastward with a zonal wave number of 1. Its horizontal wave length, phase velocity and vertical wave length were 30649.4km, 35.5m·s-1 and 50km respectively.

     

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