TY - JOUR
T1 - Interhemispheric differences of mesosphere-lower thermosphere winds and tides investigated from three whole-atmosphere models and meteor radar observations
AU - Stober, Gunter
AU - Kuchar, Ales
AU - Pokhotelov, Dimitry
AU - Liu, Huixin
AU - Liu, Han Li
AU - Schmidt, Hauke
AU - Jacobi, Christoph
AU - Baumgarten, Kathrin
AU - Brown, Peter
AU - Janches, Diego
AU - Murphy, Damian
AU - Kozlovsky, Alexander
AU - Lester, Mark
AU - Belova, Evgenia
AU - Kero, Johan
AU - Mitchell, Nicholas
N1 - Funding Information:
Financial support. 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 agree- ment 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).
Funding Information:
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).
PY - 2021/9/17
Y1 - 2021/9/17
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=85115336454&partnerID=8YFLogxK
U2 - 10.5194/acp-21-13855-2021
DO - 10.5194/acp-21-13855-2021
M3 - Article
AN - SCOPUS:85115336454
SN - 1680-7316
VL - 21
SP - 13855
EP - 13902
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
IS - 18
ER -
