Stratopheric Sudden Warming / Stratospheric Vortex Weakening animations (Northern-Hemisphere)

Animated evolution of stratospheric polar vortex at 10 hPa

The evolution of Stratospheric Sudden Warming (SSW) or Stratospheric Vortex Weakening (SVW) events. Final warmings are included. Detection criterion follow Baldwin2001 except using -2.0 as threshold to illustrate minor events as well.

Stratospheric Sudden Warming , January 17 2013 , Stratospheric Vortex Weakening

  • Minimum NAM during event -4.58

    • Stratospheric sudden warming 2013_01_17.gif

    Stratospheric Sudden Warming , January 17 2012 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.87

    • Stratospheric sudden warming 2012_01_17.gif

    Stratospheric Sudden Warming , January 30 2010 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.95

    • Stratospheric sudden warming 2010_01_30.gif

    Stratospheric Sudden Warming , January 28 2009 , Stratospheric Vortex Weakening

  • Minimum NAM during event -5.37

    • Stratospheric sudden warming 2009_01_28.gif

    Stratospheric Sudden Warming , February 24 2008 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.92

    • Stratospheric sudden warming 2008_02_24.gif

    Stratospheric Sudden Warming , February 26 2007 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.32

    • Stratospheric sudden warming 2007_02_26.gif

    Stratospheric Sudden Warming , January 24 2006 , Stratospheric Vortex Weakening

  • Minimum NAM during event -4.22

    • Stratospheric sudden warming 2006_01_24.gif

    Stratospheric Sudden Warming , March 16 2005 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.60

    • Stratospheric sudden warming 2005_03_16.gif

    Stratospheric Sudden Warming , January 9 2004 , Stratospheric Vortex Weakening

  • Minimum NAM during event -4.54

    • Stratospheric sudden warming 2004_01_09.gif

    Stratospheric Sudden Warming , January 18 2003 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.49

    • Stratospheric sudden warming 2003_01_18.gif

    Stratospheric Sudden Warming , December 31 2001 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.96

    • Stratospheric sudden warming 2001_12_31.gif

    Stratospheric Sudden Warming , February 18 2001 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.52

    • Stratospheric sudden warming 2001_02_18.gif

    Stratospheric Sudden Warming , December 20 2000 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.81

    • Stratospheric sudden warming 2000_12_20.gif

    Stratospheric Sudden Warming , March 1 1999 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.12

    • Stratospheric sudden warming 1999_03_01.gif

    Stratospheric Sudden Warming , December 18 1998 , Stratospheric Vortex Weakening

  • Minimum NAM during event -5.14

    • Stratospheric sudden warming 1998_12_18.gif

    Stratospheric Sudden Warming , January 8 1998 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.70

    • Stratospheric sudden warming 1998_01_08.gif

    Stratospheric Sudden Warming , November 23 1996 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.04

    • Stratospheric sudden warming 1996_11_23.gif

    Stratospheric Sudden Warming , February 5 1995 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.84

    • Stratospheric sudden warming 1995_02_05.gif

    Stratospheric Sudden Warming , January 2 1994 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.24

    • Stratospheric sudden warming 1994_01_02.gif

    Stratospheric Sudden Warming , March 25 1992 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.11

    • Stratospheric sudden warming 1992_03_25.gif

    Stratospheric Sudden Warming , January 15 1992 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.47

    • Stratospheric sudden warming 1992_01_15.gif

    Stratospheric Sudden Warming , January 28 1991 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.21

    • Stratospheric sudden warming 1991_01_28.gif

    Stratospheric Sudden Warming , February 13 1990 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.23

    • Stratospheric sudden warming 1990_02_13.gif

    Stratospheric Sudden Warming , February 23 1989 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.66

    • Stratospheric sudden warming 1989_02_23.gif

    Stratospheric Sudden Warming , March 13 1988 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.49

    • Stratospheric sudden warming 1988_03_13.gif

    Stratospheric Sudden Warming , December 12 1987 , Stratospheric Vortex Weakening

  • Minimum NAM during event -5.02

    • Stratospheric sudden warming 1987_12_12.gif

    Stratospheric Sudden Warming , January 25 1987 , Stratospheric Vortex Weakening

  • Minimum NAM during event -4.04

    • Stratospheric sudden warming 1987_01_25.gif

    Stratospheric Sudden Warming , March 27 1986 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.75

    • Stratospheric sudden warming 1986_03_27.gif

    Stratospheric Sudden Warming , December 31 1984 , Stratospheric Vortex Weakening

  • Minimum NAM during event -4.53

    • Stratospheric sudden warming 1984_12_31.gif

    Stratospheric Sudden Warming , March 3 1984 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.58

    • Stratospheric sudden warming 1984_03_03.gif

    Stratospheric Sudden Warming , January 26 1982 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.69

    • Stratospheric sudden warming 1982_01_26.gif

    Stratospheric Sudden Warming , December 5 1981 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.21

    • Stratospheric sudden warming 1981_12_05.gif

    Stratospheric Sudden Warming , February 6 1981 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.84

    • Stratospheric sudden warming 1981_02_06.gif

    Stratospheric Sudden Warming , March 1 1980 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.32

    • Stratospheric sudden warming 1980_03_01.gif

    Stratospheric Sudden Warming , November 27 1979 , Stratospheric Vortex Weakening

  • Minimum NAM during event -2.11

    • Stratospheric sudden warming 1979_11_27.gif

    Stratospheric Sudden Warming , February 27 1979 , Stratospheric Vortex Weakening

  • Minimum NAM during event -3.27

    • Stratospheric sudden warming 1979_02_27.gif

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