Lettau 00Z pressure 1986 - 991.8 990.9 979.2 993.0 990.0 978.5 979.7 976.3 972.6 975.2 982.1 1987 992.6 989.0 985.8 987.6 982.9 986.6 992.3 976.0 988.0 977.9 978.1 985.5 1988 988.9 984.2 985.9 981.2 988.8 995.6 974.7 976.1 983.2 988.4 981.6 983.8 1989 985.0 985.5 983.1 987.3 969.3 979.9 977.4 982.5 982.0 973.6 976.1 989.0 1990 989.3 982.9 986.0 991.6 996.2 985.3 995.9 978.9 970.9 980.7 982.9 983.8 1991 982.5 989.5 980.0 984.3 986.8 989.1 - - - - 983.3 995.1 1992 988.9 994.7 988.3 984.1 990.0 992.8 - - - - 977.6 983.1 1993 996.0 979.1 985.1 981.5 982.6 980.6 - - - - 979.8 984.5 1994 985.4 982.8 977.7 984.7 984.1 997.5 987.5 973.1 987.7 977.2 984.6 981.6 1995 981.1 981.1 991.1 982.0 981.5 985.9 - - - - 977.2 977.8 1996 985.9 - - - - - - - - - - 985.4 1997 - - - - - - - - - 978.2 - - 1998 - - 981.8 974.7 982.2 - - - - - - - 1999 - 987.1 984.1 980.7 976.3 999.3 979.0 981.9 980.9 964.4 - - 2000 - - 983.1 982.4 982.2 985.2 978.5 982.5 987.5 975.3 - - 2001 - - 983.6 978.2 983.7 981.3 985.5 981.9 976.5 971.1 - - 2002 - - 989.9 980.2 991.4 993.8 987.1 977.6 985.7 989.7 - - 2003 - - 984.3 977.5 977.8 992.6 978.0 977.4 980.4 972.6 - - 2004 - - 984.5 977.4 981.4 976.7 977.8 979.7 981.9 979.7 - - 2005 - - 982.3 979.4 980.2 988.6 980.0 976.3 975.3 970.8 - - 2006 - - 985.2 987.1 976.6 981.8 975.9 990.9 984.2 976.8 - - 2007 - 986.6 - - - 989.5 1000.7 - 982.6 986.3 985.7 978.4 2008 983.0 984.6 988.4 989.8 986.7 981.6 983.2 987.3 - - - - 2009 - 990.6 986.0 989.4 993.8 995.6 993.8 992.6 987.2 980.0 985.7 984.4 2010 999.7 994.3 989.6 985.2 987.3 980.8 973.4 977.6 - 978.3 975.7 991.0 2011 992.5 983.9 988.3 986.2 975.2 984.3 - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - 981.7 980.1 976.3 980.7 978.8 980.1 973.1 980.1 970.7 983.7 981.7 2015 983.5 975.5 979.2 978.1 981.2 980.5 973.6 975.3 972.1 976.0 974.1 983.9 2016 978.4 978.5 976.7 982.2 979.5 974.5 983.8 986.0 968.5 976.1 988.9 987.3 2017 992.2 986.9 986.9 979.2 973.2 978.2 976.6 972.8 973.1 979.7 973.8 983.2 2018 982.5 981.3 981.0 983.4 981.0 984.6 979.1 988.4 971.8 971.1 973.1 980.3 2019 984.7 986.0 982.3 978.3 982.8 970.4 984.2 980.4 969.2 978.2 989.2 993.1 2020 990.1 981.5 977.0 978.3 975.4 976.0 980.5 984.3 981.3 969.0 974.7 974.8 2021 978.5 975.0 984.4 978.0 982.3 978.1 985.2 985.0 971.1 975.1 971.8 971.7 2022 980.6 978.3 978.3 979.5 976.6 988.9 971.7 975.3 970.9 976.5 973.6 975.1 2023 977.1 981.4 981.9 989.3 978.1 985.1 982.8 984.5 976.8 973.2 979.9 976.3 2024 979.9 982.6 978.4 972.3 973.8 974.0 983.9 989.3 981.8 - - -