global

Monthly Data


vs

Annual Data


Year

average
1980 338.80
1981 339.99
1982 340.76
1983 342.43
1984 343.98
1985 345.46
1986 346.88
1987 348.61
1988 351.14
1989 352.79
1990 353.97
1991 355.29
1992 355.99
1993 356.71
1994 358.20
1995 360.02
1996 361.79
1997 362.90
1998 365.55
1999 367.63
2000 368.81
2001 370.40
2002 372.42
2003 374.97
2004 376.78
2005 378.81
2006 380.93
2007 382.67
2008 384.77
2009 386.28
2010 388.56
2011 390.44
2012 392.45
2013 395.19
2014 397.12
2015 399.40
2016 402.81
2017 404.77

Complete graph




NOAA-ESRL Cooperative Air Sampling Network

Units

Language