Gill 06Z temperature 1985 - -16.8 -26.3 - -36.2 -37.8 -51.2 -42.7 -40.8 -29.4 -15.9 -7.4 1986 -7.1 -15.5 -27.2 -35.9 -26.8 -35.4 -40.8 -47.2 -46.7 -31.1 -15.5 -7.4 1987 -5.9 -15.4 -34.7 -38.2 -38.5 -31.9 -34.9 -40.2 -38.3 -25.8 -18.3 -5.7 1988 -6.6 -16.5 -31.6 -33.1 -33.8 -35.1 -37.3 -30.9 -35.7 -26.3 -15.6 -6.4 1989 -6.1 -18.0 -27.6 -28.3 -39.8 -47.2 - - - - - - 1990 - - - - - - - - - - - - 1991 - -12.9 -31.0 -33.2 -35.0 -32.0 -41.2 -42.0 -35.2 -24.9 -14.3 -5.1 1992 -5.5 -16.3 -19.6 -37.8 -33.7 -36.0 -34.2 -45.1 - - -15.7 -6.5 1993 -6.5 -15.0 -29.7 -34.1 -40.4 -32.0 -35.3 -42.6 - -30.7 -15.8 -8.2 1994 -8.5 -18.1 -32.5 -28.5 -42.4 -39.9 -35.7 - - - - -5.0 1995 -7.5 -14.9 -28.2 -38.3 -40.7 -34.5 -42.1 - - - - -6.3 1996 -6.9 -17.0 -33.1 -28.5 -38.4 -37.3 -41.5 -34.3 -37.5 -33.3 -15.3 -7.0 1997 -7.9 -16.7 -30.9 -41.1 -35.8 -32.9 -41.6 -46.1 -37.8 -22.9 -11.7 -6.9 1998 -8.5 -13.3 -28.8 -42.0 -33.9 -31.2 -44.0 -39.5 -43.0 -28.6 -18.5 -8.6 1999 -7.9 -18.8 -33.7 -40.6 -43.4 -40.4 -32.5 -43.2 -32.0 -27.5 -14.7 -8.7 2000 -9.5 -16.9 -23.5 -33.1 -35.5 -39.7 -36.9 -38.6 -37.7 -29.8 -12.9 -8.8 2001 -11.3 -16.2 -31.7 -33.1 -38.6 -37.0 -34.4 -48.3 -39.6 -28.7 -17.2 -7.6 2002 -8.0 -15.9 -23.6 -35.5 -30.9 -40.7 -46.3 -43.8 -31.3 -25.4 -15.2 -8.0 2003 - - - -36.4 - - -35.4 - - - - - 2004 - - - - - - - - - - - - 2005 - -17.8 -30.5 -37.8 -35.8 - -34.7 -41.6 -39.9 -26.9 -16.0 -5.8 2006 -8.8 - - - - - - - - - - - 2007 - - - -33.5 -35.8 -35.9 - -37.8 -35.1 -31.5 -14.9 -6.4 2008 -5.8 -17.2 -28.3 -32.5 -35.7 -33.2 -43.3 -49.9 -35.0 -26.9 - - 2009 - - - - - - - - - - - -