McMurdo 18Z msl_pressure 1956 - - - 992.8 991.4 990.6 991.5 993.2 982.4 980.0 986.4 996.7 1957 994.3 991.1 986.4 994.1 995.5 996.5 986.8 990.3 983.6 988.3 989.7 998.4 1958 990.7 990.4 996.6 997.9 993.5 998.9 994.9 988.7 978.7 983.8 984.8 986.0 1959 990.6 988.0 987.4 994.6 995.9 994.6 993.2 996.3 980.7 986.6 981.8 993.4 1960 993.0 991.7 983.0 993.7 989.8 987.3 985.8 993.7 978.8 982.6 988.1 988.0 1961 990.7 999.0 997.3 989.6 995.6 997.5 990.9 989.0 993.1 984.1 987.1 985.6 1962 987.9 992.0 994.6 985.3 987.0 1000.8 981.9 991.3 994.1 984.7 991.3 989.1 1963 986.9 989.1 992.7 992.1 994.7 987.0 990.3 1006.6 990.4 984.5 980.0 993.5 1964 1000.7 994.9 992.1 986.9 980.0 997.7 1005.2 1000.6 980.8 980.6 993.5 994.9 1965 995.2 1005.6 991.3 989.7 1003.0 994.9 993.0 987.9 990.1 988.0 982.3 996.5 1966 991.9 994.9 997.7 992.9 1000.3 986.2 996.8 980.4 982.8 976.6 989.4 994.1 1967 999.3 997.3 993.2 997.1 993.7 990.4 991.7 982.9 986.1 985.9 995.3 992.9 1968 993.2 993.3 994.8 989.8 1002.9 993.5 983.6 993.3 992.3 989.7 993.1 994.2 1969 1003.7 994.7 991.3 997.8 994.0 1005.0 985.0 983.8 989.6 989.1 985.8 991.2 1970 989.4 990.0 988.1 993.9 985.5 988.0 996.4 977.9 992.3 986.7 988.5 997.1 1971 995.6 991.5 988.1 991.2 998.6 989.8 996.2 994.6 987.3 991.6 988.7 997.2 1972 1002.3 992.9 996.4 1001.5 993.0 998.5 994.8 996.5 988.9 977.6 983.8 996.7 1973 999.4 993.1 986.8 993.9 1000.5 995.6 989.4 984.2 986.1 982.1 988.7 988.4 1974 997.6 985.4 989.3 988.7 993.9 999.7 993.4 1001.6 984.4 987.1 994.8 996.5 1975 997.7 992.9 992.0 987.7 1000.6 995.5 996.0 986.5 979.3 981.7 989.2 996.3 1976 997.9 991.9 989.0 986.0 992.3 994.6 991.8 986.2 982.2 984.4 992.8 1007.0 1977 999.6 994.4 993.7 996.2 993.4 996.5 991.1 993.0 983.4 979.3 984.4 994.6 1978 993.2 - 993.4 996.4 992.2 994.8 1003.6 986.9 986.2 985.5 989.4 991.4 1979 991.4 990.2 985.8 990.2 989.0 984.9 981.1 990.9 984.5 985.5 988.9 996.9 1980 995.1 995.1 993.6 995.8 991.4 987.4 996.8 991.5 996.0 978.8 997.0 991.2 1981 991.3 993.2 995.1 997.9 990.9 985.1 992.4 1000.5 994.5 985.8 982.7 984.1 1982 995.7 992.1 983.0 985.7 992.0 985.7 995.0 981.8 980.9 985.5 990.4 1000.0 1983 997.2 999.7 991.2 985.4 990.6 995.0 986.1 983.6 988.6 975.6 979.0 990.9 1984 1000.0 994.5 985.0 986.4 994.0 986.8 981.2 990.5 987.0 978.6 984.4 998.2 1985 997.1 992.2 990.8 991.2 994.5 989.3 979.5 989.9 979.5 980.8 976.6 985.9 1986 993.0 999.0 997.2 987.1 999.3 996.9 987.0 - - 979.3 980.9 987.3 1987 999.4 993.5 991.6 - - - - - 994.6 986.6 983.8 991.3 1988 995.1 990.1 - 990.1 996.9 1001.2 984.4 981.8 - - - 988.5 1989 990.8 - - - - - - - - - - - 1990 - - - - - - - - - - - 990.0 1991 - - - - - - - - - - - - 1992 993.7 - - - - - - - - - - - 1993 - - - - - - - - - - - - 1994 - - - - - - - - - - - - 1995 - 988.1 - - - - - - - - - 983.7 1996 - - - - - - - - - 977.4 - 992.0 1997 - 995.7 - - - - - - - 983.7 995.6 996.8 1998 - 986.3 988.0 - - - - - - 987.2 981.2 987.6 1999 989.4 993.5 990.9 987.7 985.8 1005.6 985.9 990.4 989.0 971.9 978.8 981.0 2000 984.7 988.4 990.7 990.0 990.7 992.5 990.0 991.4 995.8 983.0 988.5 1001.9 2001 996.6 994.9 991.1 986.3 992.0 989.6 994.5 990.0 986.0 979.9 982.3 982.2 2002 988.9 983.8 996.9 988.4 999.3 1000.6 995.5 985.2 992.7 996.1 989.2 984.6 2003 996.6 996.0 991.6 984.4 984.9 999.1 986.5 984.2 986.9 980.8 988.8 999.1 2004 990.6 1000.4 990.2 985.7 988.4 985.7 984.3 989.4 989.5 986.3 983.4 996.6 2005 992.4 985.7 989.8 986.3 987.7 996.2 988.9 984.6 984.6 979.0 986.5 1001.6 2006 992.0 991.1 991.4 994.1 983.8 987.9 984.6 997.3 990.0 982.4 985.3 988.7 2007 992.5 988.9 996.2 991.5 992.9 993.1 1003.9 986.3 984.9 988.4 988.2 982.1 2008 986.0 986.0 990.2 991.5 989.6 984.0 986.4 988.4 978.8 980.3 984.0 985.6 2009 985.9 991.0 987.6 990.0 995.7 996.7 996.4 994.3 989.0 982.5 988.9 987.3 2010 1000.2 995.5 990.5 986.2 988.1 983.0 975.8 978.9 986.4 980.2 979.8 994.0 2011 996.0 990.4 995.9 994.5 984.4 993.2 990.9 993.2 995.5 983.7 991.6 981.3 2012 982.3 990.4 988.8 987.2 985.2 997.5 985.2 989.1 985.5 984.1 993.5 993.5 2013 991.6 983.9 981.9 989.5 989.4 1000.6 986.1 996.4 996.2 987.7 985.2 989.6 2014 993.4 989.1 987.8 986.1 989.3 988.0 990.3 979.5 989.1 977.8 989.5 987.1 2015 989.1 982.7 987.8 985.6 991.1 991.0 981.5 982.6 981.3 984.2 981.2 990.2 2016 983.7 - 983.9 990.4 - 984.3 - - - - - - 2017 - - - - 982.1 - - - - - 980.5 988.6 2018 988.5 987.2 990.1 992.7 990.5 992.8 989.8 995.4 977.8 - - - 2019 - - 990.5 987.9 991.8 978.1 994.2 986.9 978.2 988.4 996.5 998.9 2020 - 987.3 - 988.2 984.5 984.8 989.3 990.9 - 978.0 981.5 980.8 2021 985.7 983.1 990.8 986.8 988.8 987.4 994.0 994.6 980.3 985.6 980.2 979.0 2022 987.0 985.2 986.7 987.7 984.9 996.3 982.4 983.8 980.3 - 981.1 981.3 2023 983.0 988.8 990.3 997.3 986.6 996.2 989.9 992.7 986.2 982.1 987.1 - 2024 987.1 989.0 987.1 981.6 - - - - - - - -