Nansen_Ice_Sheet 18Z pressure 1987 - - 986.6 - - - - - - 978.9 978.6 985.3 1988 988.3 984.3 985.9 - - - - - - - 980.9 982.4 1989 984.9 984.2 985.1 988.5 973.4 982.4 981.2 986.6 984.1 976.9 976.6 988.7 1990 987.8 981.3 986.1 995.4 998.8 990.3 997.2 983.2 973.5 982.7 983.8 984.3 1991 981.9 988.7 982.1 988.0 988.7 991.1 993.1 983.5 983.5 978.0 984.2 994.2 1992 988.4 995.3 987.6 987.3 992.2 996.9 984.9 986.1 977.5 981.3 978.4 983.2 1993 995.7 979.9 987.6 984.2 985.3 978.5 975.5 979.4 978.4 977.8 - 983.0 1994 985.2 983.5 980.6 987.5 987.7 1002.0 990.7 977.8 990.8 979.8 985.3 981.5 1995 981.6 982.6 991.8 984.7 981.7 991.7 1002.8 988.1 979.4 981.8 979.9 - 1996 986.9 990.9 - - - - 986.5 990.0 992.2 974.4 988.2 986.7 1997 989.4 990.1 980.8 988.4 976.9 989.7 982.3 979.9 982.9 979.1 989.2 991.1 1998 985.7 982.3 984.3 977.8 984.9 980.8 983.3 981.2 990.3 982.5 975.9 983.0 1999 984.4 988.7 986.6 982.5 981.7 1000.8 981.8 986.5 985.0 968.4 973.9 975.3 2000 979.1 983.3 986.0 985.4 984.1 - - - - - - 996.1 2001 991.0 989.9 - 981.2 - - - 984.6 981.4 - 977.6 977.7 2002 983.7 979.4 992.4 983.4 994.6 995.0 991.4 981.3 988.5 991.4 - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -