Nansen_Ice_Sheet 00Z pressure 1987 - - 986.8 - - - - - - 979.6 979.0 985.7 1988 988.4 984.3 987.0 - - - - - - - 981.4 982.7 1989 985.1 984.4 984.7 989.2 973.6 982.5 981.5 985.5 985.6 977.1 976.6 988.8 1990 988.3 981.4 986.3 995.0 999.7 990.2 998.3 982.7 974.5 982.4 984.2 984.3 1991 982.0 988.7 982.0 989.0 988.5 992.1 992.8 984.9 982.6 979.1 983.6 994.2 1992 988.3 995.4 987.9 987.6 992.7 996.3 985.1 986.5 977.6 981.4 - 982.7 1993 995.5 980.6 987.3 985.1 985.1 979.9 975.2 979.9 978.5 978.5 - - 1994 985.6 983.7 980.4 988.2 987.1 1002.3 991.6 978.2 990.7 980.1 985.3 981.7 1995 981.5 983.0 992.1 985.0 982.5 992.3 1002.7 988.7 980.2 981.7 979.8 978.2 1996 986.5 991.3 - - - - 986.7 989.6 992.6 975.1 987.8 986.6 1997 989.1 990.6 981.2 988.6 977.3 990.2 982.3 980.4 983.1 979.4 988.6 991.4 1998 985.8 982.4 984.7 978.4 985.3 981.1 983.4 981.3 990.0 982.9 976.2 982.6 1999 984.6 988.2 987.2 983.1 981.7 1001.5 981.7 987.1 985.5 968.8 973.8 975.3 2000 978.7 984.2 986.1 985.5 983.5 - - - - - 981.9 - 2001 - - 986.3 - 987.7 - 989.9 - 982.2 975.1 977.8 977.5 2002 983.8 979.6 992.1 984.2 993.9 995.0 990.9 981.4 988.8 991.5 - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -