University of Oulu

Stober, G., Kuchar, A., Pokhotelov, D., Liu, H., Liu, H.-L., Schmidt, H., Jacobi, C., Baumgarten, K., Brown, P., Janches, D., Murphy, D., Kozlovsky, A., Lester, M., Belova, E., Kero, J., and Mitchell, N.: Interhemispheric differences of mesosphere–lower thermosphere winds and tides investigated from three whole-atmosphere models and meteor radar observations, Atmos. Chem. Phys., 21, 13855–13902,, 2021

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

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Author: Stober, Gunter1; Kuchar, Ales2; Pokhotelov, Dimitry3;
Organizations: 1Institute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, 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, Fukuoka, 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, N6A 3K7, Canada
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
12Sodankylä Geophysical Observatory, University of Oulu, Sodankylä, Finland
13Department of Physics and Astronomy, University of Leicester, Leicester, UK
14Swedish Institute of Space Physics, Kiruna, Sweden
15British Antarctic Survey, Cambridge, UK
16Department of Electronic & Electrical Engineering, University of Bath, Bath, UK
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 43.9 MB)
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Language: English
Published: Copernicus Publications, 2021
Publish Date: 2021-11-19


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).

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Series: Atmospheric chemistry and physics
ISSN: 1680-7316
ISSN-E: 1680-7324
ISSN-L: 1680-7316
Volume: 21
Issue: 18
Pages: 13855 - 13902
DOI: 10.5194/acp-21-13855-2021
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: Ales Kuchar and Christoph Jacobi acknowledge support by the Deutsche Forschungsgemeinschaft through grant no. JA 836/43-1. Huixin Liu acknowledges support by JSPS KAKENHI grant nos. 18H01270, 18H04446, 17KK0095, and JRPs-LEAD with DFG. Han-Li Liu's effort is partially supported by NASA (grant nos. 80NSSC20K1323, 80NSSC20K0601, 80NSSC20K0633) and the NSF (grant no. OPP 1443726). The National Center for Atmospheric Research is a major facility sponsored by the National Science Foundation under cooperative agreement no. 1852977. Operation of the Davis meteor radar is supported through Australian Antarctic Science projects 2668, 4025, and 4445. Diego Janches was supported by the NASA Heliophysics ISFM program. TDF's operation is supported by NASA NESC assessment TI-17-01204. This work was supported in part by the NASA Meteoroid Environment Office under cooperative agreement no. 80NSSC18M0046. PGB's operation was supported in part by the NASA Meteoroid Environment Office under cooperative agreement no. 80NSSC21M0073. PGB also acknowledges funding support from the Natural Sciences and Engineering Research Council of Canada (RGPIN-2016-04433) and the Canada Research Chairs program (grant no. 950-231930).
Copyright information: © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.