Law_Dome_Summit 18Z pressure 1987 831.9 824.4 819.1 820.6 816.1 820.0 - 804.8 813.1 813.7 816.4 826.2 1988 828.4 822.2 823.2 818.7 829.7 - 811.0 816.8 821.1 825.5 819.5 822.1 1989 829.0 820.8 - - 808.6 816.6 - 822.0 818.6 817.9 821.2 833.2 1990 828.0 821.6 - 830.3 - 823.4 820.8 817.0 810.0 820.1 823.5 826.9 1991 823.4 826.9 818.7 821.4 818.7 822.8 828.3 816.6 814.9 811.4 - - 1992 821.1 824.9 817.4 812.3 818.0 821.5 808.5 811.0 800.6 809.6 811.5 816.8 1993 824.3 814.9 814.5 812.4 805.2 809.9 802.4 800.3 804.6 804.8 810.6 816.0 1994 819.9 814.4 810.6 812.5 815.9 826.3 813.1 805.0 813.1 809.5 818.6 813.5 1995 816.5 817.2 815.7 812.2 807.9 818.1 830.9 812.1 - - - - 1996 - - - - - - - - - - - - 1997 - - - - - 826.3 - - - - - 830.0 1998 - - - - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - - - - - - - - - - - 2002 - - - - - - - - - - - - 2003 - - 822.8 - 820.5 828.5 816.0 - - - - - 2004 - - - - - 816.0 - 819.8 811.0 - - 830.1 2005 828.2 820.9 823.1 814.9 819.1 828.3 817.7 814.7 815.9 814.1 822.0 835.0 2006 826.5 824.1 819.5 824.0 811.1 818.6 812.8 824.9 818.4 812.9 822.7 823.1 2007 828.2 822.6 824.8 822.7 - - 833.3 819.3 821.6 818.3 824.0 821.7 2008 823.5 - - - - 818.8 820.5 813.7 810.2 811.7 823.3 823.6 2009 823.3 - 820.8 821.6 824.3 826.7 827.0 821.0 836.8 817.1 824.7 824.3 2010 830.6 827.0 821.9 819.4 818.4 817.6 - 810.4 - 822.3 815.2 829.3 2011 830.0 820.5 823.3 - - - - - - - - 817.7 2012 819.5 - 819.2 - - - - - - 815.7 825.6 826.4 2013 825.1 818.2 812.9 824.4 - - - - - 818.3 823.2 824.6 2014 828.1 - 827.6 - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - 829.9 833.5 2017 834.2 829.4 - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 820.6 824.6 819.1 820.0 - - - - 847.2 819.7 - 831.3 2020 - - - - - - - - - - - - 2021 - - - - - - - - - 887.7 869.1 900.7 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - 819.5 818.9 2024 823.3 - 838.2 - - - - - - - - -