D_10 00Z temperature 1980 - -6.1 -8.8 -14.6 -17.2 -18.7 -14.3 -17.4 -13.3 -16.3 -7.7 -2.8 1981 - -5.8 -11.0 -13.0 - - - - - - - - 1982 - - -13.2 -17.6 -13.8 -14.2 -17.3 -24.8 -19.9 - - - 1983 -1.9 -5.3 -13.3 - -15.5 -15.6 -22.5 - -15.5 -17.6 -9.2 - 1984 - -5.8 -8.4 -15.8 -13.8 - - - - -14.3 -8.5 - 1985 - -6.6 - - - - - -17.0 - - - - 1986 - -4.6 - - - -18.2 - - - - - -3.4 1987 -1.6 -5.9 -11.8 - -19.1 -13.9 -18.7 -21.3 -17.2 - - - 1988 -2.8 -7.3 -13.9 -15.1 -18.4 -19.2 -19.3 - -16.1 - -8.4 -4.4 1989 -4.0 -7.7 -13.9 -14.7 -18.0 -23.6 -17.5 -18.9 -14.0 - -9.7 -2.3 1990 -2.0 -8.2 -13.2 -16.0 -17.6 -20.0 -12.6 -19.8 -18.6 - - - 1991 - - -10.0 -12.6 -17.8 -13.3 - - -17.0 -12.9 -6.6 -0.9 1992 -1.6 -5.0 -9.3 -14.1 -18.0 -14.8 -17.6 -12.0 -18.1 -15.6 -6.2 -3.4 1993 -0.3 -5.6 - - - - - - - -13.7 -7.1 -1.9 1994 -2.6 -6.9 - -15.6 -21.8 - - - -14.6 -12.3 -6.8 -2.5 1995 -3.1 -5.6 -9.4 -12.2 -16.8 - - - - - - - 1996 - - - - - - - - - - - - 1997 - - - - - - - - - - - - 1998 - - - - - - - - - - - - 1999 -4.7 -7.8 -13.7 -18.7 -21.1 - - - -18.6 -13.1 -7.5 -4.5 2000 -5.1 -7.5 -12.0 -19.5 -17.4 -18.3 - - - - - -3.0 2001 -2.1 - -10.1 -15.7 -16.6 -17.7 - - - - - - 2002 - - - - - - - - -16.4 -14.8 - - 2003 - - - - - - - - -15.7 - - -2.5 2004 -1.1 -5.1 -11.2 - - -14.7 - - - - - - 2005 - - - - - - - - -16.2 -11.1 - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - -13.7 -15.6 -16.7 -21.0 -21.2 -17.0 -17.7 -16.1 -6.6 -2.4 2009 -2.0 -5.8 -12.8 -17.7 -17.1 -17.6 -14.0 -17.3 -15.9 -15.1 -7.3 -2.1 2010 -0.1 -6.8 -11.7 -18.5 -18.5 -20.7 -21.5 -19.4 -21.4 -14.1 -7.2 -1.6 2011 -1.5 -7.9 -11.7 -14.9 -19.6 -18.5 -20.5 -18.7 -17.2 -14.1 -7.5 -1.7 2012 -2.6 -7.4 -12.4 -18.6 -17.4 -18.7 -21.4 -17.8 -18.6 -15.2 -7.8 -2.7 2013 -2.1 -6.6 -11.9 -18.2 -18.4 -20.2 -23.3 -18.7 -13.3 -13.8 - - 2014 - -7.5 -13.2 - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 -2.8 -7.0 -12.8 -11.6 -20.1 -21.2 -17.9 -19.3 -19.1 -15.7 -8.9 -3.7 2019 -3.6 -7.4 -13.3 -18.9 -23.0 -23.6 -18.3 -20.9 -21.1 -16.3 - - 2020 -3.0 -7.2 -14.2 -13.6 -18.0 -20.1 -16.0 -20.4 -18.0 -15.7 -9.4 -2.7 2021 -3.3 -8.2 -13.0 -18.7 -20.4 -18.9 -21.2 -15.2 -17.5 -12.6 -9.3 -4.6 2022 -4.4 -6.4 -10.5 -16.6 -17.1 -17.6 -17.6 -20.2 -16.1 -13.1 - -4.5 2023 -4.7 -6.5 -10.5 -13.5 -18.8 -17.3 -18.7 - - - - - 2024 - - - - - - - - - - - -