Monthly average surface atmospheric carbon dioxide concentration, 1958–2015.
Scripps seasonally corrected trendNOAA average seasonally corrected trendNOAA/ESRL monthly average
1958
1958.083334
1958.166667314.952
1958.25315.682
1958.333334315.272
1958.416667315.682
1958.5315.702
1958.583334316.702
1958.666667316.602
1958.75315.952
1958.833334315.762
1958.916667315.992
1959316.152
1959.083334316.312
1959.166667315.972
1959.25315.942
1959.333334316.042
1959.416667316.582
1959.5316.382
1959.583334316.572
1959.666667317.252
1959.75316.802
1959.833334317.232
1959.916667316.912
1960316.952
1960.083334316.912
1960.166667316.812
1960.25317.212
1960.333334317.772
1960.416667317.497
1960.5317.637
1960.583334317.467
1960.666667317.422
1960.75317.317
1960.833334317.352
1960.916667317.397
1961317.367
1961.083334317.462
1961.166667317.557
1961.25317.527
1961.333334317.892
1961.416667317.867
1961.5318.002
1961.583334318.192
1961.666667318.117
1961.75318.407
1961.833334318.252
1961.916667318.122
1962318.212
1962.083334318.267
1962.166667318.502
1962.25318.452
1962.333334318.327
1962.416667318.487
1962.5318.692
1962.583334318.627
1962.666667318.997
1962.75318.682
1962.833334318.812
1962.916667318.797
1963318.947
1963.083334318.867
1963.166667318.872
1963.25319.252
1963.333334319.427
1963.416667319.442
1963.5319.287
1963.583334319.297
1963.666667319.192
1963.75319.252
1963.833334319.582
1963.916667319.652
1964320.092
1964.083334319.912
1964.166667319.952
1964.25320.002
1964.333334319.962
1964.416667320.302
1964.5320.282
1964.583334320.522
1964.666667320.182
1964.75320.382
1964.833334320.252
1964.916667320.052
1965319.962
1965.083334320.362
1965.166667320.122
1965.25320.312
1965.333334319.862
1965.416667320.252
1965.5321.212
1965.583334320.612
1965.666667321.292
1965.75320.902
1965.833334321.342
1965.916667320.762
1966321.142
1966.083334321.512
1966.166667321.612
1966.25322.042
1966.333334321.692
1966.416667322.122
1966.5322.202
1966.583334322.172
1966.666667322.122
1966.75321.712
1966.833334322.262
1966.916667322.432
1967322.582
1967.083334322.412
1967.166667322.262
1967.25322.572
1967.333334322.672
1967.416667322.462
1967.5322.362
1967.583334322.732
1967.666667322.812
1967.75322.932
1967.833334323.212
1967.916667323.302
1968323.092
1968.083334323.062
1968.166667323.082
1968.25323.152
1968.333334323.232
1968.416667323.732
1968.5323.972
1968.583334323.872
1968.666667323.932
1968.75323.872
1968.833334323.802
1968.916667324.192
1969324.522
1969.083334324.332
1969.166667324.852
1969.25324.802
1969.333334324.992
1969.416667325.112
1969.5325.692
1969.583334325.482
1969.666667325.902
1969.75325.422
1969.833334325.352
1969.916667325.472
1970325.552
1970.083334325.902
1970.166667326.072
1970.25326.262
1970.333334325.722
1970.416667326.002
1970.5326.152
1970.583334326.512
1970.666667326.622
1970.75326.822
1970.833334326.492
1970.916667326.492
1971326.692
1971.083334326.592
1971.166667326.382
1971.25325.912
1971.333334326.552
1971.416667326.902
1971.5327.142
1971.583334327.282
1971.666667326.902
1971.75327.232
1971.833334327.312
1971.916667327.372
1972327.292
1972.083334327.542
1972.166667326.922
1972.25327.812
1972.333334327.692
1972.416667327.432
1972.5327.872
1972.583334328.182
1972.666667328.492
1972.75328.732
1972.833334329.022
1972.916667328.912
1973329.072
1973.083334329.462
1973.166667329.492
1973.25329.602
1973.333334330.092
1973.416667330.392
1973.5330.672
1973.583334331.152
1973.666667331.072
1973.75330.872
1973.833334330.692
1973.916667330.012
1974329.872
1974.083334330.612
1974.166667330.672
1974.25330.742
1974.333334330.692
1974.416667330.562
1974.5330.972
1974.583334331.242
1974.666667331.002
1974.75331.072
1974.833334330.992
1974.916667330.942
1975330.922
1975.083334331.302
1975.166667331.222
1975.25331.402
1975.333334331.562
1975.416667331.902
1975.5331.702
1975.583334331.902
1975.666667332.142
1975.75332.052
1975.833334332.032
1975.916667332.132
1976332.272
1976.083334332.462
1976.166667332.652
1976.25332.642
1976.333334332.462
1976.416667332.652
1976.5332.872
1976.583334332.822
1976.666667332.902
1976.75332.652
1976.833334332.852
1976.916667333.062
1977333.452
1977.083334333.312
1977.166667333.872
1977.25334.142
1977.333334334.322
1977.416667334.552
1977.5334.712
1977.583334334.612
1977.666667335.192
1977.75334.892
1977.833334334.962
1977.916667335.222
1978335.492
1978.083334335.282
1978.166667335.812
1978.25335.822
1978.333334335.572
1978.416667336.172
1978.5336.332
1978.583334336.542
1978.666667336.372
1978.75336.282
1978.833334336.482
1978.916667336.332
1979336.752
1979.083334336.652
1979.166667337.122
1979.25336.942
1979.333334337.022
1979.416667337.562
1979.5337.512
1979.583334337.952
1979.666667337.542
1979.75337.612
1979.833334337.862
1979.916667338.112
1980337.82338.45
1980.083334338.1339.15
1980.166667338.13339.47
1980.25338.25339.86
1980.333334338.77340.3
1980.416667339.08339.86
1980.5339.19338.34
1980.583334339.39337.12
1980.666667339.34336.95
1980.75339.05337.71
1980.833334339.16338.83
1980.916667339.31339.54
1981339.46340.09
1981.083334339.61340.65
1981.166667339.94341.28
1981.25339.96341.57
1981.333334339.77341.29
1981.416667339.71340.49
1981.5339.95339.1
1981.583334340.24337.97
1981.666667340.25337.87
1981.75340.3338.96
1981.833334340.39340.07
1981.916667340.41340.64
1982340.66341.27
1982.083334340.8341.86
1982.166667340.75342.13
1982.25340.81342.42
1982.333334340.74342.27
1982.416667340.63341.39
1982.5340.51339.66
1982.583334340.3338.02
1982.666667340.45338.08
1982.75340.87339.53
1982.833334341.19340.86
1982.916667341.44341.68
1983341.62342.28
1983.083334341.61342.64
1983.166667341.6342.93
1983.25341.84343.42
1983.333334342.22343.75
1983.416667342.61343.41
1983.5342.81342.05
1983.583334342.75340.53
1983.666667342.85340.44
1983.75343.07341.67
1983.833334343.09342.74
1983.916667343.17343.39
1984343.57344.22
1984.083334343.73344.73
1984.166667343.51344.86
1984.25343.47345.09
1984.333334343.69345.24
1984.416667343.7344.47
1984.5343.92343.11
1984.583334344.41342.13
1984.666667344.49342.04
1984.75344.28342.91
1984.833334344.38344.08
1984.916667344.63344.92
1985344.58345.27
1985.083334344.69345.71
1985.166667345.24346.55
1985.25345.24346.84
1985.333334345.11346.68
1985.416667345.39346.18
1985.5345.68344.86
1985.583334345.68343.37
1985.666667345.75343.3
1985.75345.94344.56
1985.833334346.02345.69
1985.916667346.15346.45
1986346.32347.01
1986.083334346.24347.23
1986.166667346.28347.6
1986.25346.51348.13
1986.333334346.67348.23
1986.416667346.91347.68
1986.5347.06346.22
1986.583334347.14344.84
1986.666667347.17344.77
1986.75347.32345.95
1986.833334347.55347.22
1986.916667347.39347.68
1987347.15347.94
1987.083334347.4348.49
1987.166667347.8349.21
1987.25348.22349.91
1987.333334348.62350.19
1987.416667348.74349.41
1987.5348.79347.81
1987.583334348.95346.57
1987.666667349.1346.65
1987.75349.31347.93
1987.833334349.53349.2
1987.916667349.85350.16
1988350.07350.87
1988.083334350.35351.43
1988.166667350.35351.81
1988.25350.49352.26
1988.333334350.8352.43
1988.416667351.04351.75
1988.5351.25350.27
1988.583334351.53349.07
1988.666667351.79349.27
1988.75351.87350.45
1988.833334351.98351.63
1988.916667352.2352.48
1989352.21353.03
1989.083334352.38353.49
1989.166667352.61354.04
1989.25352.65354.42
1989.333334352.55354.23
1989.416667352.59353.29
1989.5352.61351.58
1989.583334352.68350.19
1989.666667353.05350.52
1989.75353.24351.81
1989.833334353.33352.99
1989.916667353.53353.84
1990353.66354.4
1990.083334353.72354.78
1990.166667353.68355.09
1990.25353.64355.41
1990.333334353.64355.31
1990.416667353.58354.23
1990.5353.7352.62
1990.583334354351.5
1990.666667354.23351.71
1990.75354.49353.1
1990.833334354.63354.36
1990.916667354.64355.1
1991354.91355.67
1991.083334354.98356.08
1991.166667355.16356.57
1991.25355.34357.09
1991.333334355.38357
1991.416667355.47356.08
1991.5355.53354.43
1991.583334355.46352.95
1991.666667355.35352.82
1991.75355.28353.9
1991.833334355.3355.06
1991.916667355.35355.85
1992355.63356.42
1992.083334355.68356.81
1992.166667355.71357.16
1992.25355.86357.65
1992.333334356.09357.73
1992.416667356.18356.77
1992.5356.22355.09
1992.583334356.13353.58
1992.666667356.04353.48
1992.75356.09354.7
1992.833334356.11355.88
1992.916667356.13356.63
1993356.25357.08
1993.083334356.27357.42
1993.166667356.4357.83
1993.25356.54358.29
1993.333334356.59358.24
1993.416667356.55357.22
1993.5356.63355.62
1993.583334356.8354.34
1993.666667356.93354.35
1993.75357.06355.59
1993.833334357.17356.83
1993.916667357.35357.72
1994357.49358.34
1994.083334357.71358.87
1994.166667357.78359.22
1994.25357.8359.57
1994.333334357.93359.61
1994.416667357.97358.68
1994.5358.13357.15
1994.583334358.43355.93
1994.666667358.55355.89
1994.75358.67357.13
1994.833334358.92358.57
1994.916667359.04359.44
1995359.16360
1995.083334359.34360.45
1995.166667359.52360.88
1995.25359.66361.35
1995.333334359.69361.31
1995.416667359.78360.47
1995.5359.84358.85
1995.583334360.04357.57
1995.666667360.49357.9
1995.75360.75359.29
1995.833334360.9360.62
1995.916667361.04361.5
1996361.06361.99
1996.083334361.17362.35
1996.166667361.26362.67
1996.25361.29363
1996.333334361.54363.14
1996.416667362.07362.74
1996.5362.46361.43
1996.583334362.42359.92
1996.666667362.17359.56
1996.75362.01360.52
1996.833334361.94361.63
1996.916667362.05362.49
1997362.19363.13
1997.083334362.33363.51
1997.166667362.47363.86
1997.25362.67364.34
1997.333334362.81364.38
1997.416667362.85363.49
1997.5362.84361.81
1997.583334362.76360.28
1997.666667362.87360.27
1997.75363.26361.79
1997.833334363.74363.46
1997.916667364.06364.51
1998364.14365.07
1998.083334364.27365.44
1998.166667364.43365.82
1998.25364.75366.41
1998.333334365.17366.71
1998.416667365.5366.11
1998.5365.71364.68
1998.583334366.11363.63
1998.666667366.44363.86
1998.75366.6365.16
1998.833334366.67366.42
1998.916667366.79367.29
1999367.01367.94
1999.083334367.19368.34
1999.166667367.35368.72
1999.25367.48369.11
1999.333334367.52369.03
1999.416667367.61368.19
1999.5367.57366.53
1999.583334367.61365.17
1999.666667367.83365.27
1999.75368.01366.58
1999.833334368.12367.89
1999.916667368.2368.72
2000368.3369.21
2000.083334368.3369.45
2000.166667368.39369.78
2000.25368.52370.17
2000.333334368.55370.08
2000.416667368.63369.17
2000.5368.92367.79
2000.583334369.14366.63
2000.666667369.12366.57
2000.75369.16367.78
2000.833334369.3369.13
2000.916667369.36369.93
2001369.63370.52
2001.083334369.85371.01
2001.166667370371.41
2001.25370.05371.72
2001.333334370.1371.63
2001.416667370.16370.7
2001.5370.4369.3
2001.583334370.62368.15
2001.666667370.73368.2
2001.75370.95369.55
2001.833334371.11370.9
2001.916667371.3371.81
2002371.39372.34
2002.083334371.49372.73
2002.166667371.7373.22
2002.25371.81373.56
2002.333334371.95373.53
2002.416667372.11372.66
2002.5372.37371.24
2002.583334372.71370.18
2002.666667373.12370.51
2002.75373.26371.78
2002.833334373.4373.11
2002.916667373.64374.09
2003373.78374.77
2003.083334373.99375.29
2003.166667374.15375.72
2003.25374.42376.2
2003.333334374.76376.36
2003.416667374.97375.53
2003.5375.12373.98
2003.583334375.32372.74
2003.666667375.57372.9
2003.75375.71374.18
2003.833334375.8375.47
2003.916667375.91376.33
2004376.05377.02
2004.083334376.23377.53
2004.166667376.37377.96
2004.25376.52378.3
2004.333334376.64378.23
2004.416667376.79377.35
2004.5376.98375.81
2004.583334376.97374.33
2004.666667376.89374.22
2004.75377.06375.56
2004.833334377.33377.03
2004.916667377.5377.99
2005377.59378.55
2005.083334377.78379.09
2005.166667378.1379.69
2005.25378.36380.16
2005.333334378.64380.27
2005.416667378.85379.45
2005.5378.92377.78
2005.583334379.18376.55
2005.666667379.28376.58
2005.75379.45377.89
2005.833334379.69379.36
2005.916667379.86380.34
2006380.09381.09
2006.083334380.35381.72
2006.166667380.49382.12
2006.25380.63382.46
2006.333334380.75382.41
2006.416667380.92381.55
2006.5381.06379.88
2006.583334381.01378.3
2006.666667381.2378.42
2006.75381.44379.84
2006.833334381.54381.21
2006.916667381.69382.18
2007381.79382.8
2007.083334381.91383.31
2007.166667382.13383.78
2007.25382.22384.04
2007.333334382.28383.91
2007.416667382.5383.08
2007.5382.6381.36
2007.583334382.81380.06
2007.666667383.23380.45
2007.75383.42381.86
2007.833334383.48383.2
2007.916667383.7384.21
2008383.97384.98
2008.083334384.11385.5
2008.166667384.28385.9
2008.25384.48386.29
2008.333334384.63386.26
2008.416667384.77385.35
2008.5385.17383.87
2008.583334385.32382.54
2008.666667385.05382.3
2008.75384.93383.43
2008.833334385.16384.93
2008.916667385.46386.01
2009385.76386.8
2009.083334385.83387.26
2009.166667385.84387.49
2009.25385.96387.77
2009.333334386.14387.73
2009.416667386.23386.74
2009.5386.21384.84
2009.583334386.31383.46
2009.666667386.44383.71
2009.75386.68385.24
2009.833334386.94386.76
2009.916667387.13387.7
2010387.43388.44
2010.083334387.75389.13
2010.166667387.85389.49
2010.25387.98389.78
2010.333334388.15389.74
2010.416667388.3388.82
2010.5388.54387.21
2010.583334388.87386.09
2010.666667389.23386.52
2010.75389.5388.05
2010.833334389.66389.46
2010.916667389.68390.22
2011389.69390.74
2011.083334389.74391.15
2011.166667389.84391.46
2011.25390.05391.84
2011.333334390.27391.87
2011.416667390.46390.97
2011.5390.38389.06
2011.583334390.45387.71
2011.666667390.82388.09
2011.75391.14389.66
2011.833334391.23391.02
2011.916667391.36391.86
2012391.39392.43
2012.083334391.63393.02
2012.166667391.94393.55
2012.25392.03393.82
2012.333334392.11393.69
2012.416667392.17392.66
2012.5392.28390.9
2012.583334392.58389.77
2012.666667393.09390.37
2012.75393.4391.97
2012.833334393.54393.38
2012.916667393.62394.2
2013393.87394.91
2013.083334394.1395.5
2013.166667394.44396.08
2013.25394.73396.55
2013.333334394.91396.58
2013.416667395.4395.89
2013.5395.83394.49
2013.583334395.94393.15
2013.666667395.77393.02
2013.75395.85394.35
2013.833334396395.79
2013.916667396.14396.68
2014396.26397.3
2014.083334396.36397.76
2014.166667396.41398.05
2014.25396.6398.41
2014.333334396.81398.48
2014.416667397.03397.52
2014.5397.3395.96
2014.583334397.63394.85
2014.666667397.67394.93
2014.75397.72396.21
2014.833334397.9397.68
2014.916667398.09398.62