Great_Wall 18Z temperature 1987 - - - - - - - - - -2.2 -0.2 - 1988 - 3.3 - - -1.8 -7.5 - -7.9 - -2.8 -1.2 0.5 1989 - 3.1 2.9 -4.5 -0.9 -2.3 -0.8 -1.9 -2.5 -0.6 0.5 1.8 1990 3.1 - 1.9 -4.6 -4.6 -4.3 -5.4 - -2.4 -2.0 -0.6 - 1991 2.8 - 0.1 - - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - - - - - - - - -2.2 0.2 1.2 1994 2.9 2.3 1.8 -0.8 -3.6 -3.6 - - -2.9 -5.0 0.8 - 1995 - 3.3 1.0 - -2.6 -6.4 -12.1 -11.3 -6.8 -0.7 -0.5 1.4 1996 2.5 3.4 1.9 -1.2 -2.5 -4.6 -3.2 -4.0 -2.0 -1.6 -0.2 1.5 1997 3.9 2.9 2.2 -1.2 -1.5 -4.4 -6.8 -5.0 -6.5 -2.6 -2.0 - 1998 3.3 3.5 1.4 1.1 -1.7 -1.4 -5.4 - -7.9 -1.6 -0.6 0.9 1999 2.9 2.7 2.4 1.1 -0.7 -3.6 -3.4 -4.7 -4.9 -1.4 0.6 2.0 2000 2.7 2.9 1.6 0.2 -1.0 -2.2 -3.2 -6.2 -5.5 -1.7 -0.6 0.8 2001 2.3 1.2 - -2.7 -1.1 -4.9 -6.6 -2.6 -2.1 -0.6 0.4 - 2002 - 3.1 0.3 - -6.0 -9.4 -6.9 -4.1 -2.8 -5.5 -1.0 1.0 2003 2.9 2.8 0.3 0.0 -2.5 -7.5 -5.8 - - -2.0 -1.1 -0.6 2004 1.7 2.5 1.4 - -2.8 -2.9 -3.7 -3.8 -4.5 - - 1.1 2005 1.9 2.6 1.0 -0.7 -3.6 -8.0 -6.2 -3.4 -1.7 -0.9 0.0 0.8 2006 - - 3.2 0.0 -0.8 - -4.3 -7.3 -4.0 - 0.0 2.0 2007 2.7 2.7 -0.2 -3.6 - - -12.5 -5.2 -2.8 -3.0 -0.8 1.1 2008 2.0 2.9 1.2 -1.4 -1.9 -3.5 -3.7 -4.3 -0.6 - 0.9 2.6 2009 3.5 - - - - - - - - - - -