惑星規模波束の群速度を用いた成層圏突然昇温の励起源に関する解析  [in Japanese] Analysis on the Forcing Region of Sudden Stratospheric Warmings by Using Group Velocity of Planetary Wave Packets  [in Japanese]

Access this Article

Search this Article

Abstract

An analysis method to detect emanation regions and the associated emanation period of planetary wave (PW) packets inducing the sudden stratospheric warming (SSW) is developed. The method traces a 3D wave ray of a PW packet based on its group velocity computed from the 3D wave activity flux for stationary PWs defined by Plumb. By applying the method to a SSW event occurred in December 2001, we detect two key circulation anomalies near the tropopause, from which PW packets propagate efficiently into the stratosphere and subsequently cause the SSW: one is a blocking in the North Atlantic, the other is a cyclonic anomaly residing in East Asia and the North Pacific. The important role of the latter anomaly for the occurrence of the SSW is firstly recognized in our study.

Journal

  • 京都大学防災研究所年報 = DPRI annuals

    京都大学防災研究所年報 = DPRI annuals (59), 168-179, 2015

    京都大学防災研究所

Codes

  • NII Article ID (NAID)
    120005867085
  • NII NACSIS-CAT ID (NCID)
    AN00027786
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • Journal Type
    大学紀要
  • ISSN
    0386-412X
  • NDL Article ID
    027652923
  • NDL Call No.
    YH247-547
  • Data Source
    NDL  IR 
Page Top