Orcadas 18Z msl_pressure 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - - - - - - - - 989.2 988.5 - 1990 - - - 985.8 1003.6 - - - 995.5 - - - 1991 - - - 993.8 - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - 989.5 989.2 993.3 993.0 - 992.0 987.0 984.8 990.2 985.8 1994 986.2 - - 996.7 - - 993.2 996.9 - 988.8 - - 1995 - - - 996.2 - 985.6 989.4 993.7 - 993.3 - 987.5 1996 - - 987.8 993.1 988.4 992.4 994.3 991.1 1003.6 990.1 - - 1997 992.3 992.9 989.5 986.1 999.5 999.8 990.7 989.2 989.0 991.2 995.8 - 1998 - - 993.8 996.1 - 997.6 983.4 987.8 - 986.7 - - 1999 - - - 990.6 994.3 998.8 993.3 989.1 992.3 985.5 992.0 986.8 2000 983.4 - 1004.0 - - 1000.7 1006.8 991.9 1002.5 988.7 994.2 992.0 2001 994.3 988.8 - 989.0 1004.1 991.9 991.8 987.8 992.4 992.1 989.4 - 2002 - 990.5 991.0 - 992.1 988.2 996.5 999.8 1005.6 993.5 990.7 994.5 2003 992.9 992.5 993.2 994.1 994.1 1002.6 987.7 - - 988.0 - 995.4 2004 990.4 998.6 993.0 - 990.0 989.1 996.9 993.1 983.0 - - 994.7 2005 - 989.3 994.6 984.8 995.6 995.4 999.3 - 1001.4 - 990.0 992.5 2006 993.5 998.2 989.2 996.8 - 997.0 - 1001.5 991.5 - - 989.2 2007 988.5 990.3 987.6 991.0 999.1 990.4 995.1 992.8 1001.1 987.7 992.1 988.0 2008 990.1 993.7 992.8 990.5 998.2 996.2 1001.0 995.4 1006.2 991.0 - - 2009 990.2 - - - - - - - - - - -