• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/jess/126/02/0019

    • Keywords

       

      Sudden stratospheric warming; convective activity; stratospheric vortex split events.

    • Abstract

       

      Sudden stratospheric warming (SSW) events are identified to investigate their influence on the equatorial tropospheric climate. Composite analysis of warming events from Era-Interim (1979–2013) record a cooling of the tropical lower stratosphere with corresponding changes in the mean meridional stratosphericcirculation. A cooling of the upper troposphere induces enhanced convective activity near the equatorial region of the Southern Hemisphere and suppressed convective activity in the off-equatorial Northern Hemisphere. After selecting vortex splits, the see-saw pattern of convective activity in the tropospheregrows prominent and robust.

    • Author Affiliations

       

      Sourabh Bal1 2 Semjon Schimanke3 Thomas Spangehl4 Ulrich Cubasch1

      1. Institute for Meteorology, Freie Universit¨at, Berlin, Germany.
      2. Department of Physics, Swami Vivekananda Institute of Science and Technology, Kolkata, India.
      3. Swedish Meteorological and Hydrological Institute, Norrkoping, Sweden.
      4. German Weather Service, Offenbach am Main, Germany.
    • Dates

       
  • Journal of Earth System Science | News

© 2017-2019 Indian Academy of Sciences, Bengaluru.