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  4. Interhemispheric differences of mesosphere-lower thermosphere winds and tides investigated from three whole-atmosphere models and meteor radar observations
 
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2021
Journal Article
Title

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

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 timescales 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 the Ground-to-Topside Model of Atmosphere and Ionosphere for Aeronomy (GAIA), the Whole Atmosphere Community Climate Model Extension (Specified Dynamics) (WACCM-X(SD)), and the 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 are also some differences in the mean wind climatologies of the models and the observations. Our results indicate that GAIA shows reasonable agreement with the meteor radar observations during the winter season, whereas WACCM-X(SD) shows 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).
Author(s)
Stober, Gunter
Univ. of Bern
Kuchar, Ales
Univ. Leipzig
Pokhotelov, Dimitry
German Aerospace Center (DLR)
Liu, Huixin
Kyushu Univ.
Liu, Han-Li
National Center for Atmospheric Research, Boulder, CO, USA
Schmidt, Hauke
Max Planck Institute for Meteorology
Jacobi, Christoph
Univ. Leipzig
Baumgarten, Kathrin  
Fraunhofer-Institut für Graphische Datenverarbeitung IGD  
Brown, Peter
Univ. of Western Ontario, Canada
Janches, Diego
NASA Goddard Space Flight Center
Murphy, Damian
Australian Antarctic Division
Kozlovsky, Alexander
Univ. of Oulu
Lester, Mark
Univ. of Leicester
Belova, Evgenia
Swedish Institute of Space Physics
Kero, Johan
Swedish Institute of Space Physics
Mitchell, Nicholas
British Antarctic Survey, Cambridge / Univ. of Bath
Journal
Atmospheric chemistry and physics  
Funder
Deutsche Forschungsgemeinschaft DFG  
Ministerium für Bildung, Kultur, Sport, Wissenschaft und Technologie MEXTM BW
Ministerium für Bildung, Kultur, Sport, Wissenschaft und Technologie MEXT
Ministerium für Bildung, Kultur, Sport, Wissenschaft und Technologie MEXT
National Aeronautics & Space Administration NASA
National Aeronautics & Space Administration NASA
National Aeronautics & Space Administration NASA
National Science Foundation NSF  
Open Access
DOI
10.5194/acp-21-13855-2021
Language
English
Fraunhofer-Institut für Graphische Datenverarbeitung IGD  
Keyword(s)
  • academic research

  • physics

  • scientific data analysis

  • environmental monitoring

  • Lead Topic: Smart City

  • Research Line: Computer graphics (CG)

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