Preprints
https://doi.org/10.5194/acp-2021-33
https://doi.org/10.5194/acp-2021-33

  04 Feb 2021

04 Feb 2021

Review status: a revised version of this preprint is currently under review for the journal ACP.

Climatology of migrating and non-migrating tides observed by three meteor radars in the southern equatorial region

Jianyuan Wang1,2, Wen Yi1,2,3, Jianfei Wu1,2,4, Tingdi Chen1,2,4, Xianghui Xue1,2,4,5, Robert A. Vincent6, Iain M. Reid6,7, Paulo P. Batista8, Ricardo A. Buriti9, Toshitaka Tsuda10, and Xiankang Dou1,11 Jianyuan Wang et al.
  • 1CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China
  • 2Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
  • 3State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing, China
  • 4CAS Center for Excellence in Comparative Planetology, Hefei, China
  • 5Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, China
  • 6School of Physical Sciences, University of Adelaide, Adelaide, South Australia, Australia
  • 7ATRAD Pty Ltd, Thebarton, Australia
  • 8National Institute for Space Research, S. J. dos Campos, 12227-010, Brazil
  • 9Federal University of Campina Grande, PB, Brazil
  • 10Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Uji, Kyoto, Japan
  • 11Wuhan University, Wuhan, China

Abstract. We present a study of migrating and non-migrating tidal winds observed simultaneously by three meteor radars situated in the southern equatorial region. The radars are located at Cariri (7.4° S, 36.5° W), Brazil, Kototabang (0.2° S, 100.3° E), Indonesia and Darwin (12.3° S, 130.8° E), Australia. Harmonic analysis was used to obtain amplitudes and phases for diurnal and semidiurnal solar migrating and non-migrating tides between 80 and 100 km altitude during the period 2005 to 2008. They include the important tidal components of diurnal westward-propagating zonal wavenumber 1 (DW1), diurnal eastward-propagating zonal wavenumber 3 (DE3), semidiurnal westward-propagating zonal wavenumber 2 (SW2), and semidiurnal eastward-propagating zonal wavenumber 2 (SE2). In addition, we also present a climatology of these wind tides and analyze the reliability of the fitting through the reference to Whole Atmosphere Community Climate Model (WACCM) winds. The analysis suggests that the migrating tides could be well fitted by the three different radars, but the non-migrating tides might be overestimated. The results based on observations were also compared with the Climatological Tidal Model of the Thermosphere (CTMT). In general, climatic features between observations and model migrating tides were satisfactory in both wind components. However, the features of the DW1, DE3 and SW2 amplitudes in both wind components were slightly different from the results of the CTMT models. This result is probably because tides could be enhanced by the 2006 northern hemisphere stratospheric sudden warming (NH-SSW) event.

Jianyuan Wang et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Review of acp-2021-33', Anonymous Referee #1, 06 Feb 2021
  • RC2: 'Comment on acp-2021-33', Anonymous Referee #2, 28 Apr 2021

Jianyuan Wang et al.

Jianyuan Wang et al.

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Short summary
In this study, we report the climatology of migrating and non-migrating tides in mesopause winds estimated using multiyear observations from three meteor radars in the southern equatorial region. The results reveal that the climatological patterns of tidal amplitudes by meteor radars is similar to the Climatological Tidal Model of the Thermosphere (CTMT) results and the differences are mainly due to the effect of the stratospheric sudden warming (SSW) event.
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