global

Monthly data


vs

Annual data


Year
average
1979 336.85
1980 338.91
1981 340.11
1982 340.86
1983 342.53
1984 344.07
1985 345.54
1986 346.97
1987 348.68
1988 351.16
1989 352.78
1990 354.06
1991 355.39
1992 356.09
1993 356.83
1994 358.33
1995 360.17
1996 361.93
1997 363.05
1998 365.70
1999 367.80
2000 368.97
2001 370.57
2002 372.59
2003 375.15
2004 376.95
2005 378.98
2006 381.15
2007 382.90
2008 385.02
2009 386.50
2010 388.76
2011 390.63
2012 392.65
2013 395.40
2014 397.35
2015 399.65
2016 403.08
2017 405.22
2018 407.58
2019 410.04
2020 412.51
2021 414.81
2022 417.24
2023 419.56
2024 422.63

Complete graph




NOAA-ESRL Cooperative Air Sampling Network

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