武汉上空中间层和低热层大气风场的季节特征研究OA

Using 96 months of observation data from the Wuhan meteor radar(114.4°E,30.6°N),the seasonal characteristics of the horizontal background wind,diurnal tide,and semidiurnal tide in the middle and lower thermosphere over Wuhan have been studied.The results show strong shear in the monthly average zonal wind,with a prominent easterly flow in summer.The meridional wind is northward in winter and southward in other seasons.The HWM14 model winds are notably weaker than the observed values in summer.Tidal analysis reveals that diurnal tides dominate in Wuhan,with both diurnal and semidiurnal tide amplitudes exhibiting strong seasonal variation,peaking around the equinoxes.Compared to the Global Scale Wave Model(GSWM),the observed diurnal tide amplitude is smaller,while the semidiurnal tide amplitude is larger.These results highlight discrepancies between model simulations and observations,emphasizing the need for improved observations and model refinement.Valuable insights into regional atmospheric dynamics and model enhancement have been provided through an in-depth analysis of Wuhan meteor radar observation data.