A Comparison of Meteor Radar Observation over China Region with Horizontal Wind Model (HWM14)

Abstract

This paper compares the wind fields measured by the meteor radar at Mohe, Beijing, Wuhan, and Sanya stations and horizontal wind model (HWM14) predictions. HWM14 appears to successfully reproduce the height-time distribution of the monthly mean zonal winds, although large discrepancies occur in wind speed between the model and measurement, especially in the summer and winter months. For meridional wind, the consistency between model prediction and radar observation is worse than that of zonal wind. The consistency between radar measurements and model prediction at Sanya station is worse than other sites located at higher latitudes. Harmonic analysis reveals large discrepancies in diurnal, semidiurnal, and terdiurnal tides extracted from meteor radar observations and HWM14 predictions.

The Possible Role of Turbopause on Sporadic‐E Layer Formation at Middle and Low Latitudes

“…In this study, due to the wind estimation algorithm of meteor radar, wind measurement resolution of meteor radar is normally one hour (Tang et al., 2021). As a consequence, fluctuations of the MLT wind due to gravity wave and turbulent dissipation are smoothed and hence cannot be generally observed.…”

Line-of-Sight Winds and Doppler Effect Smearing in ACE-FTS Solar Occultation Measurements

“…Finally, comparisons are made to wind profiles from meteor radar observations over China [16], ground-based measurements that provide vector winds in the upper mesosphere and lower thermosphere by measuring Doppler shifts of electromagnetic radiation reflected from meteor ablation trails.…”

“…A network of VHF all-sky meteor radar stations from the Institute of Geology and Geophysics from the Chinese Academy of Science has provided a long-term dataset for winds in the altitude range from 70 km to 110 km [16]. Vector winds at four locations in China (Mohe: 52.5° N, 122.3° E; Beijing: 40.3° N, 116.2° E; Wuhan: 30.5° N, 114.6° E; and Sanya: 18.3° N, 109.6° E) are reported at hourly intervals.…”

“…A network of VHF all-sky meteor radar stations from the Institute of Geology and Geophysics from the Chinese Academy of Science has provided a long-term dataset for winds in the altitude range from 70 km to 110 km [16]. Vector winds at four locations in China (Mohe: 52.…”

“…On the UARS, there was also a triple etalon Fabry-Perot interferometer called the High-Resolution Doppler Imager (HRDI) that used O 2 emissions to measure winds in this altitude region [14]. Mesospheric winds are also provided from ground-based measurements using the Na lidar and meteor radar [15,16], field-widened Michelson interferometers [17], and Fabry Perot interferometers [18]. Line-of-sight winds in the vicinity of the mesopause were derived using the Doppler shift in O 2 emission lines from the Microwave Limb Sounder (MLS) instrument on the Aura satellite [19].…”