摘要
A meteor radar chain located along the 120°E meridian in the Northern Hemisphere from low to middle latitudes provides longterm horizontal wind observations of the mesosphere and lower thermosphere(MLT)region.In this study,we report a seasonal variation and its latitudinal feature in the horizontal mean wind in the MLT region observed by six meteor radar instruments located at Mohe(53.5°N,122.3°E),Beijing(40.3°N,116.2°E),Mengcheng(33.4°N,116.5°E),Wuhan(30.6°N,114.4°E),Kunming(25.6°N,108.3°E),and Fuke(19.5°N,109.1°E)stations.In addition,we compare the wind in the MLT region measured by the meteor radar stations with those simulated by the Whole Atmosphere Community Climate Model(WACCM).In general,the WACCM appears to capture well the seasonal and latitudinal variations in the zonal wind component.In particular,the temporal evolution of the eastward zonal wind maximum shifts from July to May as the latitude decreases.However,the simulated WACCM meridional wind exhibits differences from the meteor radar observations.
基金
supported by the National Natural Science Founda-tion of China(Grant Nos.42125402,41974174,42074181,42188101,41831071,42174183,and 41904135)
the B-type Strate-gic Priority Program of the Chinese Academy of Sciences(CAS,Grant No.XDB41000000)
the Project of Stable Support for Youth Team in Basic Research Field,CAS(Grant No.YSBR-018)
the Open Research Project of Large Research Infrastructures of CAS,titled“Study on the Interaction Between Low/Mid-Latitude Atmosphere and Ionosphere Based on the Chinese Meridian Project,”the Fundamental Research Funds for the Central Universities(Grant No.YD3420002004)
the Anhui Provincial Natural Science Foun-dation(Grant No.2008085MD113)
the Joint Open Fund of Mengcheng National Geophysical Observatory(MENGO-202209)
the foundation of the National Key Laboratory of Electromag-netic Environment(Grant No.JCKY2020210C614240301).
