Byrd 06Z temperature 1980 - - -25.2 -22.1 -25.4 -34.7 -25.8 -28.6 -34.6 -29.3 -23.2 -15.7 1981 - -23.3 -24.7 -30.8 -32.1 -30.3 -36.2 -43.1 -35.7 -29.5 -24.1 -14.9 1982 -14.3 -20.4 -30.4 -38.6 -36.0 -30.0 -35.6 -31.9 -37.6 -30.8 -22.8 -13.4 1983 -15.4 -27.3 -28.2 -28.1 -29.2 -39.4 -39.7 -42.3 -34.7 -32.5 -23.9 -16.2 1984 -15.6 -20.5 -21.6 -27.6 -30.0 -29.0 -40.0 -39.0 -36.6 -26.1 -21.1 -13.4 1985 -14.4 -23.7 -27.6 -29.0 -30.2 -30.4 -41.8 -38.8 -33.9 -30.2 -17.3 -15.9 1986 -15.3 -20.2 -27.7 -27.7 -27.5 -36.4 -36.4 -40.4 -45.0 -31.2 -21.6 -15.0 1987 -14.4 -19.6 -33.6 -33.0 -31.2 -28.5 -28.6 -31.6 -34.8 -29.8 -24.9 -14.8 1988 -14.3 -20.9 - - - - - - - - - - 1989 - - - - - - - - - - - - 1990 - -21.4 -33.9 -30.2 -28.2 -39.9 -37.8 -41.2 -31.0 - - - 1991 - -17.1 -30.9 -29.0 -31.3 -32.9 -37.1 -38.6 -32.2 -27.4 -21.9 -12.3 1992 -15.9 -23.7 -24.5 -29.1 -24.6 - - - - - - - 1993 - - - - - - - - - - - - 1994 - -23.9 -31.3 -27.4 -31.4 -32.8 -34.5 -40.5 -38.1 -27.4 -18.7 -12.7 1995 -15.5 -18.3 -30.6 -30.5 -37.4 -26.1 -35.6 -35.5 -33.5 -33.6 -23.0 -15.3 1996 -14.8 -22.2 -27.5 - - - - - - - - - 1997 - -21.1 -27.6 -34.2 -35.8 -30.7 -35.3 -40.3 -34.7 -25.7 -19.9 -11.8 1998 -15.3 -17.1 -29.2 -34.3 -24.8 -27.2 -41.2 -36.0 -37.6 -34.0 -24.5 -15.7 1999 -13.9 -23.0 -27.0 -35.5 -34.3 - - - - - - -15.2 2000 - - - - - -31.4 -30.3 -34.8 - - - - 2001 - - - - - - - - - - - - 2002 -13.5 -20.0 -19.5 - - - - - - - - -13.8 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - -25.4 -26.1 -29.4 -28.6 -36.6 - - -18.6 -14.1 2008 -12.0 -20.6 -22.1 -29.0 -31.8 - - - - -25.8 - - 2009 - - - - - - - - - - - -