Year
|
Value
|
Polutant
|
1800
|
282.9
|
CO2 (ppm)
|
1805
|
283.4
|
CO2 (ppm)
|
1810
|
283.8
|
CO2 (ppm)
|
1815
|
284
|
CO2 (ppm)
|
1820
|
284.2
|
CO2 (ppm)
|
1825
|
284.3
|
CO2 (ppm)
|
1830
|
284.4
|
CO2 (ppm)
|
1835
|
283.8
|
CO2 (ppm)
|
1840
|
283.4
|
CO2 (ppm)
|
1845
|
283.9
|
CO2 (ppm)
|
1850
|
284.7
|
CO2 (ppm)
|
1855
|
285.4
|
CO2 (ppm)
|
1860
|
286.2
|
CO2 (ppm)
|
1865
|
286.9
|
CO2 (ppm)
|
1870
|
287.5
|
CO2 (ppm)
|
1875
|
288.7
|
CO2 (ppm)
|
1880
|
290.7
|
CO2 (ppm)
|
1885
|
293
|
CO2 (ppm)
|
1890
|
294.2
|
CO2 (ppm)
|
1895
|
294.8
|
CO2 (ppm)
|
1900
|
295.8
|
CO2 (ppm)
|
1905
|
297.6
|
CO2 (ppm)
|
1910
|
299.7
|
CO2 (ppm)
|
1915
|
301.4
|
CO2 (ppm)
|
1920
|
303
|
CO2 (ppm)
|
1925
|
305
|
CO2 (ppm)
|
1930
|
307.2
|
CO2 (ppm)
|
1935
|
309.4
|
CO2 (ppm)
|
1940
|
310.4
|
CO2 (ppm)
|
1945
|
310.1
|
CO2 (ppm)
|
1950
|
310.7
|
CO2 (ppm)
|
1955
|
313
|
CO2 (ppm)
|
1960
|
316.9
|
CO2 (ppm)
|
1965
|
320
|
CO2 (ppm)
|
1970
|
325
|
CO2 (ppm)
|
1975
|
331.3
|
CO2 (ppm)
|
1978
|
334.6
|
CO2 (ppm)
|
1979
|
336.7
|
CO2 (ppm)
|
1980
|
338.7
|
CO2 (ppm)
|
1981
|
339.7
|
CO2 (ppm)
|
1982
|
340.9
|
CO2 (ppm)
|
1983
|
342.5
|
CO2 (ppm)
|
1984
|
344.1
|
CO2 (ppm)
|
1985
|
345.5
|
CO2 (ppm)
|
1986
|
346.9
|
CO2 (ppm)
|
1987
|
348.5
|
CO2 (ppm)
|
1988
|
350.9
|
CO2 (ppm)
|
1989
|
352.6
|
CO2 (ppm)
|
1990
|
353.7
|
CO2 (ppm)
|
1991
|
355.1
|
CO2 (ppm)
|
1992
|
355.9
|
CO2 (ppm)
|
1993
|
356.6
|
CO2 (ppm)
|
1994
|
358.2
|
CO2 (ppm)
|
1995
|
360.2
|
CO2 (ppm)
|
1996
|
362
|
CO2 (ppm)
|
1997
|
363.2
|
CO2 (ppm)
|
1998
|
365.7
|
CO2 (ppm)
|
1999
|
367.8
|
CO2 (ppm)
|
2000
|
368.9
|
CO2 (ppm)
|
2001
|
370.4
|
CO2 (ppm)
|
2002
|
372.5
|
CO2 (ppm)
|
2003
|
375.1
|
CO2 (ppm)
|
2004
|
376.6
|
CO2 (ppm)
|
2005
|
379
|
CO2 (ppm)
|
2006
|
381.2
|
CO2 (ppm)
|
2007
|
382.9
|
CO2 (ppm)
|
2008
|
385
|
CO2 (ppm)
|
2009
|
386.4
|
CO2 (ppm)
|
2010
|
388.7
|
CO2 (ppm)
|
2011
|
390.6
|
CO2 (ppm)
|
2012
|
392.6
|
CO2 (ppm)
|
2013
|
395.5
|
CO2 (ppm)
|
2014
|
397.5
|
CO2 (ppm)
|
2015
|
399.6
|
CO2 (ppm)
|
2016
|
402.9
|
CO2 (ppm)
|
1800
|
750.8
|
CH4 (ppb)
|
1805
|
755.5
|
CH4 (ppb)
|
1810
|
760.1
|
CH4 (ppb)
|
1815
|
764.9
|
CH4 (ppb)
|
1820
|
769.7
|
CH4 (ppb)
|
1825
|
774.5
|
CH4 (ppb)
|
1830
|
779.3
|
CH4 (ppb)
|
1835
|
784.2
|
CH4 (ppb)
|
1840
|
789.1
|
CH4 (ppb)
|
1845
|
795.2
|
CH4 (ppb)
|
1850
|
801.4
|
CH4 (ppb)
|
1855
|
808.5
|
CH4 (ppb)
|
1860
|
815.6
|
CH4 (ppb)
|
1865
|
823.4
|
CH4 (ppb)
|
1870
|
831.2
|
CH4 (ppb)
|
1875
|
839.3
|
CH4 (ppb)
|
1880
|
847.5
|
CH4 (ppb)
|
1885
|
857.4
|
CH4 (ppb)
|
1890
|
867.2
|
CH4 (ppb)
|
1895
|
878.8
|
CH4 (ppb)
|
1900
|
890.3
|
CH4 (ppb)
|
1905
|
912.1
|
CH4 (ppb)
|
1910
|
935.5
|
CH4 (ppb)
|
1915
|
961.5
|
CH4 (ppb)
|
1920
|
990.2
|
CH4 (ppb)
|
1925
|
1020.2
|
CH4 (ppb)
|
1930
|
1049
|
CH4 (ppb)
|
1935
|
1076.5
|
CH4 (ppb)
|
1940
|
1102.4
|
CH4 (ppb)
|
1945
|
1128.8
|
CH4 (ppb)
|
1950
|
1161.7
|
CH4 (ppb)
|
1955
|
1207
|
CH4 (ppb)
|
1960
|
1263
|
CH4 (ppb)
|
1965
|
1328.5
|
CH4 (ppb)
|
1970
|
1403.2
|
CH4 (ppb)
|
1975
|
1483.6
|
CH4 (ppb)
|
1978
|
1532.8
|
CH4 (ppb)
|
1979
|
1549.5
|
CH4 (ppb)
|
1980
|
1566.3
|
CH4 (ppb)
|
1981
|
1583.5
|
CH4 (ppb)
|
1982
|
1600.7
|
CH4 (ppb)
|
1983
|
1617.9
|
CH4 (ppb)
|
1984
|
1635.1
|
CH4 (ppb)
|
1985
|
1652.3
|
CH4 (ppb)
|
1986
|
1669.5
|
CH4 (ppb)
|
1987
|
1680.7
|
CH4 (ppb)
|
1988
|
1698.8
|
CH4 (ppb)
|
1989
|
1710.5
|
CH4 (ppb)
|
1990
|
1709.3
|
CH4 (ppb)
|
1991
|
1729.1
|
CH4 (ppb)
|
1992
|
1731.1
|
CH4 (ppb)
|
1993
|
1735.7
|
CH4 (ppb)
|
1994
|
1741.7
|
CH4 (ppb)
|
1995
|
1747.1
|
CH4 (ppb)
|
1996
|
1749.9
|
CH4 (ppb)
|
1997
|
1754.1
|
CH4 (ppb)
|
1998
|
1763.1
|
CH4 (ppb)
|
1999
|
1772.9
|
CH4 (ppb)
|
2000
|
1774.5
|
CH4 (ppb)
|
2001
|
1773.4
|
CH4 (ppb)
|
2002
|
1773.6
|
CH4 (ppb)
|
2003
|
1777.7
|
CH4 (ppb)
|
2004
|
1775.5
|
CH4 (ppb)
|
2005
|
1774.7
|
CH4 (ppb)
|
2006
|
1776.5
|
CH4 (ppb)
|
2007
|
1781.8
|
CH4 (ppb)
|
2008
|
1790
|
CH4 (ppb)
|
2009
|
1793.7
|
CH4 (ppb)
|
2010
|
1796.9
|
CH4 (ppb)
|
2011
|
1803.6
|
CH4 (ppb)
|
2012
|
1810.4
|
CH4 (ppb)
|
2013
|
1815.5
|
CH4 (ppb)
|
2014
|
1824.5
|
CH4 (ppb)
|
2015
|
1834.8
|
CH4 (ppb)
|
2016
|
|
CH4 (ppb)
|
1800
|
273
|
N2O (ppb)
|
1805
|
273.2
|
N2O (ppb)
|
1810
|
273.5
|
N2O (ppb)
|
1815
|
273.7
|
N2O (ppb)
|
1820
|
274
|
N2O (ppb)
|
1825
|
274.2
|
N2O (ppb)
|
1830
|
274.4
|
N2O (ppb)
|
1835
|
274.7
|
N2O (ppb)
|
1840
|
274.9
|
N2O (ppb)
|
1845
|
275.2
|
N2O (ppb)
|
1850
|
275.4
|
N2O (ppb)
|
1855
|
275.9
|
N2O (ppb)
|
1860
|
276.4
|
N2O (ppb)
|
1865
|
276.9
|
N2O (ppb)
|
1870
|
277.4
|
N2O (ppb)
|
1875
|
277.8
|
N2O (ppb)
|
1880
|
278.2
|
N2O (ppb)
|
1885
|
278.7
|
N2O (ppb)
|
1890
|
279.1
|
N2O (ppb)
|
1895
|
279.5
|
N2O (ppb)
|
1900
|
279.8
|
N2O (ppb)
|
1905
|
280.3
|
N2O (ppb)
|
1910
|
281
|
N2O (ppb)
|
1915
|
281.8
|
N2O (ppb)
|
1920
|
282.9
|
N2O (ppb)
|
1925
|
284
|
N2O (ppb)
|
1930
|
285
|
N2O (ppb)
|
1935
|
285.9
|
N2O (ppb)
|
1940
|
286.7
|
N2O (ppb)
|
1945
|
287.8
|
N2O (ppb)
|
1950
|
289
|
N2O (ppb)
|
1955
|
290.1
|
N2O (ppb)
|
1960
|
291.4
|
N2O (ppb)
|
1965
|
292.9
|
N2O (ppb)
|
1970
|
294.9
|
N2O (ppb)
|
1975
|
297.4
|
N2O (ppb)
|
1978
|
298.8
|
N2O (ppb)
|
1979
|
300
|
N2O (ppb)
|
1980
|
300.6
|
N2O (ppb)
|
1981
|
301.2
|
N2O (ppb)
|
1982
|
303.6
|
N2O (ppb)
|
1983
|
303.8
|
N2O (ppb)
|
1984
|
304
|
N2O (ppb)
|
1985
|
304.5
|
N2O (ppb)
|
1986
|
305.4
|
N2O (ppb)
|
1987
|
305.6
|
N2O (ppb)
|
1988
|
306.5
|
N2O (ppb)
|
1989
|
307.5
|
N2O (ppb)
|
1990
|
308.8
|
N2O (ppb)
|
1991
|
309.6
|
N2O (ppb)
|
1992
|
310
|
N2O (ppb)
|
1993
|
310.3
|
N2O (ppb)
|
1994
|
311
|
N2O (ppb)
|
1995
|
311.8
|
N2O (ppb)
|
1996
|
312.7
|
N2O (ppb)
|
1997
|
313.4
|
N2O (ppb)
|
1998
|
314
|
N2O (ppb)
|
1999
|
314.8
|
N2O (ppb)
|
2000
|
315.8
|
N2O (ppb)
|
2001
|
316.6
|
N2O (ppb)
|
2002
|
317.2
|
N2O (ppb)
|
2003
|
317.9
|
N2O (ppb)
|
2004
|
318.5
|
N2O (ppb)
|
2005
|
319.2
|
N2O (ppb)
|
2006
|
319.9
|
N2O (ppb)
|
2007
|
320.6
|
N2O (ppb)
|
2008
|
321.6
|
N2O (ppb)
|
2009
|
322.3
|
N2O (ppb)
|
2010
|
323.1
|
N2O (ppb)
|
2011
|
324
|
N2O (ppb)
|
2012
|
324.9
|
N2O (ppb)
|
2013
|
325.8
|
N2O (ppb)
|
2014
|
326.9
|
N2O (ppb)
|
2015
|
327.7
|
N2O (ppb)
|
2016
|
|
N2O (ppb)
|