O_Higgins 18Z msl_pressure 1987 - - - - - - - - - - - - 1988 - - - - - - - - - 1001.7 983.7 - 1989 - - - - - - 993.1 - - - 981.9 - 1990 - - - 990.3 1004.0 - - - - - - - 1991 - - - - - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - - - - - - - - 981.8 984.9 984.1 1994 983.6 - - 994.7 - - - 988.9 - - - - 1995 - - - - - 988.7 - - - - 981.4 - 1996 990.3 988.4 985.1 995.5 986.7 992.6 989.3 989.9 996.4 983.8 975.9 - 1997 988.4 993.2 986.8 985.9 997.5 1002.0 988.1 984.8 993.1 990.1 996.3 - 1998 984.6 - 990.3 - 999.1 994.5 980.0 985.6 988.7 980.6 983.9 981.9 1999 988.6 984.6 995.2 986.3 991.5 996.3 989.5 987.7 990.4 982.3 984.8 981.5 2000 980.9 994.5 1001.3 - - 996.2 1003.8 991.2 999.8 987.9 994.2 989.0 2001 990.0 987.7 - 987.1 998.9 991.6 995.5 978.5 989.0 982.2 - - 2002 - 984.5 992.4 - 993.3 990.6 994.2 997.4 1002.1 989.4 - 989.4 2003 993.2 986.5 995.7 991.4 989.7 998.2 983.7 - - 983.5 983.4 995.1 2004 987.0 994.7 988.4 - 992.0 986.8 989.5 988.6 977.3 - - 990.6 2005 986.0 984.3 990.8 983.5 994.6 996.1 996.5 990.6 998.6 990.6 989.9 993.9 2006 - - 980.6 991.0 - - 991.0 999.9 990.1 - 981.3 985.2 2007 988.6 987.6 987.3 990.6 - - 994.3 986.0 996.0 982.4 990.2 983.2 2008 986.2 988.2 990.3 987.8 993.0 992.9 995.5 990.3 998.6 - 983.5 979.7 2009 984.6 - - - - - - - - - - -