D_47 00Z temperature 1983 - -15.7 - - - - - - - - -20.4 - 1984 - -18.1 -21.1 -30.3 -27.1 - - -28.1 - -27.4 -21.7 - 1985 - - -23.2 - - - - - - - - - 1986 - -14.7 - -27.9 -31.9 - - - - - - -14.3 1987 - - - - -31.7 -25.2 - -33.3 -28.1 -22.5 - -14.4 1988 -13.2 - - -27.1 - - - - - - - - 1989 - - - - - - - - - - - - 1990 - - - - - - - - - - - - 1991 - - - - - - - - - - - - 1992 - -18.0 -23.5 -27.5 -30.3 -27.3 - - - -29.2 -18.5 -15.2 1993 -11.5 -16.8 -22.0 -27.4 -31.5 -34.3 - - - - - - 1994 - - - - - - - -34.5 -25.6 -24.4 - - 1995 - - - - - - - - - - - - 1996 - - - - - - - - - - - - 1997 - - - - - - - - - - - - 1998 - - - - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - - - - - - - - - - - 2002 - - - - - - - - - - - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - -18.0 -25.6 -30.5 - - - -30.4 - - - -11.6 2006 - -17.8 - - - - - - - - - - 2007 - -18.5 -21.6 - - - - - - - - - 2008 -13.1 - - - - - - - - - - -12.4 2009 - - -24.3 -30.2 -28.6 -29.0 -24.7 -29.1 -27.2 -26.9 -18.8 -13.3 2010 - -18.8 -23.6 -30.6 -29.3 -31.8 -32.5 -29.8 -32.3 -25.7 -18.8 -12.7 2011 -12.4 -19.9 -24.2 -26.6 -30.9 -30.0 -32.1 -29.3 -27.3 -25.1 -18.9 -13.6 2012 -14.1 -18.9 -24.2 -29.5 -27.8 -28.5 -32.3 -28.4 -29.6 -26.7 -19.1 -13.3 2013 -11.9 -19.8 -25.0 -30.5 -29.5 -30.9 -34.1 -29.2 -24.5 -25.7 -20.7 -12.4 2014 -11.9 -18.6 -24.6 -26.3 -30.9 -33.3 -28.4 -33.4 -30.5 -26.3 -17.7 -14.1 2015 - - -22.1 -29.7 -28.3 -31.7 -32.2 -31.9 -32.0 -29.5 -20.9 -13.6 2016 -14.2 -19.5 -23.8 -30.0 -24.6 -29.8 -29.9 -29.7 -29.3 -24.8 -16.3 -13.2 2017 -12.5 -14.4 -25.3 -29.0 -29.9 -33.3 -31.4 -33.0 -28.2 -26.2 -18.8 -14.6 2018 -12.8 -17.7 -24.4 -22.7 -31.7 -32.7 -28.6 -29.6 -30.4 -27.1 -19.4 -13.5 2019 -14.4 -17.3 -21.3 -26.7 -31.1 -32.2 -25.6 -30.9 -30.6 -26.0 -17.4 -12.2 2020 -11.9 -18.4 -26.2 -23.9 -29.4 -32.1 -27.4 -32.8 -29.3 -26.2 -20.0 -12.6 2021 -13.6 -19.0 -25.1 -30.4 -32.6 -30.5 -31.9 -25.4 -28.9 -23.1 -20.2 -13.3 2022 -15.6 -17.4 -22.3 -29.1 -29.1 -29.5 -28.8 -32.0 -27.8 -24.6 -18.3 -14.0 2023 -14.7 -16.7 -21.4 -25.3 -30.4 -29.8 -30.9 -31.1 -28.9 -28.2 -20.2 -14.3 2024 -14.5 -19.4 -24.2 -33.3 -31.3 -31.7 -26.4 -29.7 -30.3 -26.5 -18.9 -