Behavior of air temperature and density vertical distribution in the middle atmosphere above Tomsk during stratospheric warming and quiet periods.

Marichev V.N., Bochkovsky D.A.
  1. V.E. Zuev Institute of Atmospheric Optics SB RAS, Russia

   The paper analyzes the influence of winter stratospheric warming (SW) on
   the characteristics of air temperature and density vertical distribution
   in the middle atmosphere above Tomsk. Sudden SW in winters of 2009/10,
   10/11 and 11/12 and summers of 2010 -12 with a stable vertical temperature
   distribution were considered . It is shown, that for disturbed conditions,
   caused by winter warming, air temperature and density deviation from the
   mean values are in opposition. Their maximum amplitude is observed at the
   height from 35 to 40 km and can reach +30% for temperature and -30% for
   density. Under quiet conditions in summer months the temperature deviation
   is within - 6%÷ +8%, and air density - 8% ÷ +15%.