Preprints
https://doi.org/10.5194/acp-2021-142
https://doi.org/10.5194/acp-2021-142

  18 Mar 2021

18 Mar 2021

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

Interhemispheric differences of mesosphere/lower thermosphere winds and tides investigated from three whole atmosphere models and meteor radar observations

Gunter Stober1, Ales Kuchar2, Dimitry Pokhotelov3, Huixin Liu4, Han-Li Liu5, Hauke Schmidt6, Christoph Jacobi2, Kathrin Baumgarten7, Peter Brown8,9, Diego Janches10, Damian Murphy11, Alexander Kozlovsky12, Mark Lester13, Evgenia Belova14, and Johan Kero14 Gunter Stober et al.
  • 1Institute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, Switzerland
  • 2Institute for Meteorology, Universität Leipzig, Leipzig, Germany
  • 3Institute for Solar-Terrestrial Physics, German Aerospace Center (DLR), Neustrelitz, Germany
  • 4Department of Earth and Planetary Science, Kyushu University, Japan
  • 5High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, USA
  • 6Max Planck Institute for Meteorology, Hamburg, Germany
  • 7Fraunhofer Institute for Computer Graphics Research IGD, Rostock, Germany
  • 8Dept. of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada N6A 3K7
  • 9Western Institute for Earth and Space Exploration, University of Western Ontario, London, Ontario, N6A 5B7, Canada
  • 10ITM Physics Laboratory, Mail Code 675, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
  • 11Australian Antarctic Division, Kingston, Tasmania, Australia
  • 12Sodankyla Geophysical Observatory, University of Oulu, Finland
  • 13University of Leicester, Leicester, UK
  • 14Swedish Institute of Space Physics, Kiruna, Sweden

Abstract. Long-term and continuous observations of mesospheric/lower thermospheric winds are rare, but they are important to investigate climatological changes at these altitudes on time scales of several years, covering a solar cycle and longer. Such long time series are a natural heritage of the mesosphere/lower thermosphere climate, and they are valuable to compare climate models or long term runs of general circulation models (GCMs). Here we present a climatological comparison of wind observations from six meteor radars at two conjugate latitudes to validate the corresponding mean winds and atmospheric diurnal and semidiurnal tides from three GCMs, namely Ground-to-Topside Model of Atmosphere and Ionosphere for Aeronomy (GAIA), Whole Atmosphere Community Climate Model Extension (Specified Dynamics) (WACCM-X(SD)) and Upper Atmosphere ICOsahedral Non-hydrostatic (UA-ICON) model. Our results indicate that there are interhemispheric differences in the seasonal characteristics of the diurnal and semidiurnal tide. There also are some differences in the mean wind climatologies of the models and the observations. Our results indicate that GAIA shows a reasonable agreement with the meteor radar observations during the winter season, whereas WACCM-X(SD) shows a better agreement with the radars for the hemispheric zonal summer wind reversal, which is more consistent with the meteor radar observations. The free running UA-ICON tends to show similar winds and tides compared to WACCM-X(SD).

Gunter Stober et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-142', Anonymous Referee #1, 19 Apr 2021
    • AC1: 'Reply on RC1', Gunter Stober, 17 May 2021
  • RC2: 'Comment on acp-2021-142', Anonymous Referee #2, 21 Apr 2021
    • AC2: 'Reply on RC2', Gunter Stober, 17 May 2021

Gunter Stober et al.

Gunter Stober et al.

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