Marilyn 18Z temperature 1987 - -19.4 -28.8 -31.2 -28.7 - - - - - -17.4 -7.5 1988 -9.1 -18.0 -28.7 -27.6 -27.5 - -31.3 - - - - - 1989 - -19.6 -24.8 - - -35.2 -32.3 - - - - - 1990 - -16.8 -20.6 - - -29.2 - - - - - - 1991 - -14.5 -29.4 -26.7 -31.4 -27.8 -34.8 -33.1 -28.1 -26.4 -17.4 -6.7 1992 -8.1 -20.3 -24.5 -31.3 -27.2 -33.8 -28.3 -34.3 -32.5 -25.5 -18.1 -8.6 1993 -10.8 -19.4 -28.5 -26.7 - - -28.9 -35.5 -32.2 -30.5 -15.7 -11.8 1994 -9.2 -19.9 -30.2 -24.9 -37.6 -31.7 -31.4 -34.5 -35.1 -24.3 -14.8 -8.9 1995 -9.8 -16.4 -29.3 -32.1 -34.2 - - - - - -15.0 -7.1 1996 -8.8 -18.2 -27.4 -23.2 -32.2 -31.5 -33.8 -27.4 -29.7 -27.9 -15.2 -7.4 1997 -9.4 -21.8 -29.4 -31.7 -29.5 -30.0 -35.4 -34.4 -30.7 -21.9 -11.7 -8.4 1998 -10.9 -14.3 -26.9 -32.9 -30.9 -24.1 -32.4 -32.1 -34.4 -25.7 -17.5 -8.6 1999 -7.3 -18.4 -28.5 -35.6 -33.2 -31.9 -29.2 -35.6 -27.1 -24.2 -13.3 -9.0 2000 -10.3 -18.0 -23.6 -26.6 -29.1 -31.0 -30.5 - - - - - 2001 - -14.2 -27.5 -27.4 -30.2 -27.3 -28.2 -38.7 -28.1 -27.0 -16.5 -7.4 2002 -7.0 -16.8 -22.3 -26.8 -27.3 -35.8 -35.2 -35.9 -26.9 -24.2 -16.4 -9.5 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - -30.7 -27.8 - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -