Influence of High Latitude Sudden Stratospheric Warming on Tropical Weather: Observations From a 205 MHz Stratosphere Troposphere Radar and Surface Meteorological Parameters

The study illustrates the evidence of dynamical coupling between high-latitude sudden stratospheric warming (SSW) events that occurred in three consecutive winter seasons and concomitant changes wind pattern lower stratosphere troposphere observed with a state-of-the-art 205 MHz stratosphere-troposphere profiling Radar, located at Cochin (10.03°N, 77.33°E), tropical station southwest peninsular India. Associated occurrence SSW, region experiences change zonal speed direction upper tropospheric altitudes after central day warming. also reversed its prevailing direction. Downward propagation during SSW period is noticed, which supported by reanalysis data set. In troposphere, vertical experienced fluctuations varying amplitudes soon peak event. surface meteorological parameters an area (8°–12°N, 74°–78°E), centered Cochin, from ERA-Interim are examined. An abrupt fall outgoing longwave radiation, followed convection unusual rainfall 5–6 days before events, unique exciting feature noted study. Detailed analysis past 20 years confirmed observational over low latitude related onset SSW. Comprehensive numeric modeling studies needed to understand mechanism for high latitudes associated convective activity precipitation region.