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Chinese Journal of Space Science ›› 2018, Vol. 38 ›› Issue (4): 482-491.doi: 10.11728/cjss2018.04.482

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Characteristics of Wind and Planetary Waves Based on FPI over Kelan of Chinaormalsize

ZHANG Yiyao1, SHENG Zheng1, SHI Hanqing1, JIANG Yu1, YANG Pinglü1, CAO Yu2   

  1. 1. College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101;
    2. College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing 210044
  • Received:2017-04-17 Revised:2017-09-21 Online:2018-07-15 Published:2018-07-16

Abstract:

The horizontal wind data observed by Fabry-Perot Interferometer (FPI) over Kelan, China, has been used to investigate the characteristics of wind and planetary waves at altitudes of 87, 97 and 250km. Firstly, the midnight winds have been compared with those from HWM07. The results are as follows. At 87 and 97km, the AO (Annual Oscillation) and SAO (Semiannual Oscillation) phases of zonal wind of FPI tend to consist with those from HWM07, while the phases of FPI meridional wind lag behind. Both the zonal and meridional FPI amplitudes are smaller. It shows large discrepancies between FPI and HWM07 winds, which reveals that the improvement of HWM07 model needs to further consider the influence of solar activity and interplanetary magnetic field. Secondly, the Lomb-Scargle analysis and the least squares harmonic fitting method have been used to derive the amplitudes of planetary waves at the three altitudes. At 87 and 97km, the 16-day waves are prominent at autumn, winter and spring during 2013-2014, while the 6.5-day waves tend to dominant spring and autumn. Both of the two planetary waves have weak amplitudes around mesopause. The amplitudes are stronger in meridional wind than zonal at 250km. Three typical planetary wave period bands of meridional wind show that the strongest amplitudes persist from May to October. This is consist with the results of ionospheric f0F2 oscillations.

Key words: Fabry-Perot Interferometer, Wind feature, Planetary waves

CLC Number: