Coupling between the lower and middle atmosphere observed during a very severe cyclonic storm ‘Madi’

摘要: Abstract Synoptic-scale systems like cyclones can generate broad spectrum of waves, which propagate from its source to the middle atmosphere. Coupling between lower and atmosphere over Tirupati (13.6°N, 79.4°E) is studied during a very severe cyclonic storm ‘Madi’ (06–13 December 2013) using Weather Research Forecast (WRF) model assimilated fields simultaneous meteor radar observations. Since high temporal spatial measurements are difficult obtain these disturbances, WRF simulations obtained by assimilating conventional satellite observations 3DVAR technique. The outputs validated for their consistency in predicting cyclone track vertical structure comparing them with independent good agreement prompted us use investigate gravity waves (GWs) tides Tirupati. GWs periods 1–5 h observed clear downward phase propagation stratosphere. These upward propagating also noticed horizontal wind MLT region (70–110 km). Interestingly, enhancement tidal activity both zonal meridional winds mesosphere thermosphere (MLT) peak except suppression semi-diurnal tide wind. A troposphere stratosphere ERA5. results thus provide evidence on coupling induced tropical cyclone.