# number_of_header_lines: 70
# comment:  
# comment:  ************ USE OF ESRL GMD DATA ****************
# comment:  
# comment: These data are made freely available to the public and the
# comment: scientific community in the belief that their wide dissemination
# comment: will lead to greater understanding and new scientific insights.
# comment: The availability of these data does not constitute publication
# comment: of the data.  NOAA relies on the ethics and integrity of the user to
# comment: ensure that GML receives fair credit for their work.  If the data 
# comment: are obtained for potential use in a publication or presentation, 
# comment: GML should be informed at the outset of the nature of this work.  
# comment: If the GML data are essential to the work, or if an important 
# comment: result or conclusion depends on the GML data, co-authorship
# comment: may be appropriate.  This should be discussed at an early stage in
# comment: the work.  Manuscripts using the GML data should be sent to GML
# comment: for review before they are submitted for publication so we can
# comment: ensure that the quality and limitations of the data are accurately
# comment: represented.
# comment: Please see accompanying README file, if available, for citation text.
# comment:  
# comment: Every effort is made to produce the most accurate and precise
# comment: measurements possible.  However, we reserve the right to make
# comment: corrections to the data based on recalibration of standard gases
# comment: or for other reasons deemed scientifically justified.
# comment: 
# comment: We are not responsible for results and conclusions based on use
# comment: of these data without regard to this warning.
# comment: 
# contact_parameter: CH4 CCGG (Individual Flasks)
# contact_name: Ed Dlugokencky
# contact_telephone: (303) 497-6228
# contact_email: Ed.Dlugokencky@noaa.gov
# comment: 
# comment:  ************ COLLABORATORS ***************
# comment: 
# comment: NOAA thanks the following collaborators without
# comment: whom these measurements would not be possible.
# comment: 
# collaborator_name: NOAA Atlantic Oceanographic and Meteorological
# collaborator_name: Laboratory [AOML]
# comment: 
# comment:  ************ RECIPROCITY AGREEMENT ***************
# comment: 
# comment: Use of these data implies an agreement to reciprocate.
# comment: Laboratories making similar measurements agree to make their
# comment: own data available to the general public and to the scientific
# comment: community in an equally complete and easily accessible form.
# comment: Modelers are encouraged to make available to the community,
# comment: upon request, their own tools used in the interpretation
# comment: of the GML data, namely well documented model code, transport
# comment: fields, and additional information necessary for other
# comment: scientists to repeat the work and to run modified versions.
# comment: Model availability includes collaborative support for new
# comment: users of the models.
# comment:
# comment:  ************ DATA DESCRIPTION ***************
# comment:
# description_site-code: key
# description_project-abbr: ccg_surface
# description_strategy-abbr: flask
# description_analysis-constraints: flag:..%
# description_creation-time: 2021-07-30 12:32:20
# comment:
# comment:  ************ DATA DOCUMENTATION ***************
# comment:
# comment: Please refer to the species-specific README file in the
# comment: appropriate directory folder at ftp://aftp.cmdl.noaa.gov/data/trace_gases/.
# comment:
# data_fields: site year month value
KEY 1983 10  1678.59
KEY 1983 11  1689.04
KEY 1983 12  1685.77
KEY 1984  1  1703.07
KEY 1984  2  1691.90
KEY 1984  3  1670.85
KEY 1984  4  1683.92
KEY 1984  5  1688.03
KEY 1984  6  1674.75
KEY 1984  7  1664.39
KEY 1984  8  1670.35
KEY 1984  9  1691.86
KEY 1984 10  1704.95
KEY 1984 11  1703.21
KEY 1984 12  1702.83
KEY 1985  1  1716.89
KEY 1985  2  1708.86
KEY 1985  3  1699.94
KEY 1985  4  1713.46
KEY 1985  5  1709.13
KEY 1985  6  1682.83
KEY 1985  7  1664.74
KEY 1985  8  1667.73
KEY 1985  9  1684.80
KEY 1985 10  1703.28
KEY 1985 11  1712.09
KEY 1985 12  1723.68
KEY 1986  1  1727.58
KEY 1986  2  1723.92
KEY 1986  3  1734.89
KEY 1986  4  1742.85
KEY 1986  5  1716.15
KEY 1986  6  1686.94
KEY 1986  7  1679.54
KEY 1986  8  1674.96
KEY 1986  9  1690.10
KEY 1986 10  1717.90
KEY 1986 11  1716.95
KEY 1986 12  1727.13
KEY 1987  1  1737.33
KEY 1987  2  1739.10
KEY 1987  3  1742.84
KEY 1987  4  1736.35
KEY 1987  5  1712.83
KEY 1987  6  1693.60
KEY 1987  7  1695.30
KEY 1987  8  1702.61
KEY 1987  9  1732.46
KEY 1987 10  1754.37
KEY 1987 11  1738.93
KEY 1987 12  1738.59
KEY 1988  1  1754.66
KEY 1988  2  1742.80
KEY 1988  3  1734.54
KEY 1988  4  1744.41
KEY 1988  5  1739.29
KEY 1988  6  1725.88
KEY 1988  7  1715.05
KEY 1988  8  1704.92
KEY 1988  9  1732.77
KEY 1988 10  1767.36
KEY 1988 11  1767.35
KEY 1988 12  1760.73
KEY 1989  1  1749.67
KEY 1989  2  1738.71
KEY 1989  3  1738.53
KEY 1989  4  1751.87
KEY 1989  5  1752.33
KEY 1989  6  1722.78
KEY 1989  7  1712.16
KEY 1989  8  1712.28
KEY 1989  9  1728.32
KEY 1989 10  1756.16
KEY 1989 11  1774.08
KEY 1989 12  1774.20
KEY 1990  1  1766.25
KEY 1990  2  1762.91
KEY 1990  3  1767.16
KEY 1990  4  1776.42
KEY 1990  5  1764.76
KEY 1990  6  1747.05
KEY 1990  7  1747.03
KEY 1990  8  1738.74
KEY 1990  9  1741.05
KEY 1990 10  1780.02
KEY 1990 11  1797.00
KEY 1990 12  1777.19
KEY 1991  1  1769.08
KEY 1991  2  1775.48
KEY 1991  3  1776.54
KEY 1991  4  1764.21
KEY 1991  5  1745.77
KEY 1991  6  1735.16
KEY 1991  7  1726.65
KEY 1991  8  1733.77
KEY 1991  9  1751.44
KEY 1991 10  1764.06
KEY 1991 11  1782.34
KEY 1991 12  1799.34
KEY 1992  1  1802.25
KEY 1992  2  1788.47
KEY 1992  3  1783.09
KEY 1992  4  1794.79
KEY 1992  5  1782.68
KEY 1992  6  1755.68
KEY 1992  7  1740.56
KEY 1992  8  1732.84
KEY 1992  9  1764.92
KEY 1992 10  1800.72
KEY 1992 11  1795.36
KEY 1992 12  1784.53
KEY 1993  1  1782.30
KEY 1993  2  1787.34
KEY 1993  3  1803.58
KEY 1993  4  1800.09
KEY 1993  5  1778.23
KEY 1993  6  1763.42
KEY 1993  7  1757.08
KEY 1993  8  1747.32
KEY 1993  9  1742.62
KEY 1993 10  1756.99
KEY 1993 11  1775.50
KEY 1993 12  1783.92
KEY 1994  1  1783.16
KEY 1994  2  1776.54
KEY 1994  3  1773.62
KEY 1994  4  1778.44
KEY 1994  5  1768.11
KEY 1994  6  1751.68
KEY 1994  7  1747.66
KEY 1994  8  1748.42
KEY 1994  9  1771.00
KEY 1994 10  1795.96
KEY 1994 11  1791.40
KEY 1994 12  1790.84
KEY 1995  1  1813.75
KEY 1995  2  1824.68
KEY 1995  3  1812.30
KEY 1995  4  1796.22
KEY 1995  5  1778.91
KEY 1995  6  1757.93
KEY 1995  7  1753.54
KEY 1995  8  1754.35
KEY 1995  9  1753.77
KEY 1995 10  1789.31
KEY 1995 11  1824.35
KEY 1995 12  1811.14
KEY 1996  1  1811.32
KEY 1996  2  1809.85
KEY 1996  3  1803.47
KEY 1996  4  1804.07
KEY 1996  5  1792.59
KEY 1996  6  1776.16
KEY 1996  7  1760.50
KEY 1996  8  1762.27
KEY 1996  9  1785.68
KEY 1996 10  1801.91
KEY 1996 11  1794.59
KEY 1996 12  1790.16
KEY 1997  1  1802.30
KEY 1997  2  1804.48
KEY 1997  3  1811.97
KEY 1997  4  1822.55
KEY 1997  5  1797.35
KEY 1997  6  1770.02
KEY 1997  7  1756.06
KEY 1997  8  1757.24
KEY 1997  9  1781.34
KEY 1997 10  1813.81
KEY 1997 11  1820.32
KEY 1997 12  1817.81
KEY 1998  1  1821.87
KEY 1998  2  1827.99
KEY 1998  3  1823.16
KEY 1998  4  1807.81
KEY 1998  5  1797.27
KEY 1998  6  1799.66
KEY 1998  7  1796.38
KEY 1998  8  1782.96
KEY 1998  9  1801.89
KEY 1998 10  1835.76
KEY 1998 11  1830.12
KEY 1998 12  1815.14
KEY 1999  1  1832.17
KEY 1999  2  1841.46
KEY 1999  3  1823.74
KEY 1999  4  1809.01
KEY 1999  5  1819.16
KEY 1999  6  1807.28
KEY 1999  7  1792.67
KEY 1999  8  1809.21
KEY 1999  9  1801.72
KEY 1999 10  1804.11
KEY 1999 11  1828.30
KEY 1999 12  1823.29
KEY 2000  1  1830.63
KEY 2000  2  1840.22
KEY 2000  3  1825.94
KEY 2000  4  1834.53
KEY 2000  5  1823.45
KEY 2000  6  1786.26
KEY 2000  7  1778.47
KEY 2000  8  1776.29
KEY 2000  9  1785.15
KEY 2000 10  1817.68
KEY 2000 11  1842.09
KEY 2000 12  1851.86
KEY 2001  1  1844.65
KEY 2001  2  1838.03
KEY 2001  3  1835.86
KEY 2001  4  1825.03
KEY 2001  5  1802.51
KEY 2001  6  1780.13
KEY 2001  7  1775.75
KEY 2001  8  1768.36
KEY 2001  9  1775.75
KEY 2001 10  1811.09
KEY 2001 11  1834.77
KEY 2001 12  1846.07
KEY 2002  1  1850.84
KEY 2002  2  1833.51
KEY 2002  3  1819.53
KEY 2002  4  1814.96
KEY 2002  5  1804.60
KEY 2002  6  1788.31
KEY 2002  7  1780.19
KEY 2002  8  1773.41
KEY 2002  9  1780.12
KEY 2002 10  1806.63
KEY 2002 11  1813.20
KEY 2002 12  1827.99
KEY 2003  1  1858.54
KEY 2003  2  1841.78
KEY 2003  3  1826.47
KEY 2003  4  1839.91
KEY 2003  5  1817.66
KEY 2003  6  1789.51
KEY 2003  7  1776.73
KEY 2003  8  1787.54
KEY 2003  9  1815.73
KEY 2003 10  1848.59
KEY 2003 11  1862.80
KEY 2003 12  1853.16
KEY 2004  1  1852.79
KEY 2004  2  1842.95
KEY 2004  3  1848.18
KEY 2004  4  1856.46
KEY 2004  5  1819.59
KEY 2004  6  1782.35
KEY 2004  7  1778.60
KEY 2004  8  1772.07
KEY 2004  9  1783.99
KEY 2004 10  1826.71
KEY 2004 11  1831.06
KEY 2004 12  1833.63
KEY 2005  1  1860.08
KEY 2005  2  1848.76
KEY 2005  3  1832.03
KEY 2005  4  1844.28
KEY 2005  5  1824.95
KEY 2005  6  1790.22
KEY 2005  7  1793.61
KEY 2005  8  1804.48
KEY 2005  9  1794.55
KEY 2005 10  1800.62
KEY 2005 11  1855.05
KEY 2005 12  1877.45
KEY 2006  1  1856.23
KEY 2006  2  1841.58
KEY 2006  6  1784.56
KEY 2006  7  1781.33
KEY 2006  8  1778.54
KEY 2006  9  1814.44
KEY 2006 10  1835.59
KEY 2006 11  1817.01
KEY 2006 12  1825.65
KEY 2007  1  1840.74
KEY 2007  2  1846.05
KEY 2007  3  1850.10
KEY 2007  4  1849.97
KEY 2007  5  1843.09
KEY 2007  6  1825.19
KEY 2007  7  1800.61
KEY 2007  8  1791.64
KEY 2007  9  1802.02
KEY 2007 10  1815.46
KEY 2007 11  1828.43
KEY 2007 12  1846.01
KEY 2008  1  1858.14
KEY 2008  2  1837.60
KEY 2008  3  1831.83
KEY 2008  4  1851.55
KEY 2008  5  1833.75
KEY 2008  6  1794.78
KEY 2008  7  1789.06
KEY 2008  8  1798.22
KEY 2008  9  1806.01
KEY 2008 10  1842.12
KEY 2008 11  1875.56
KEY 2008 12  1857.21
KEY 2009  1  1854.43
KEY 2009  2  1872.22
KEY 2009  3  1859.26
KEY 2009  4  1845.60
KEY 2009  5  1828.82
KEY 2009  6  1805.33
KEY 2009  7  1801.42
KEY 2009  8  1800.78
KEY 2009  9  1802.61
KEY 2009 10  1832.17
KEY 2009 11  1839.47
KEY 2009 12  1857.51
KEY 2010  1  1898.37
KEY 2010  2  1875.81
KEY 2010  3  1846.28
KEY 2010  4  1859.83
KEY 2010  5  1853.68
KEY 2010  6  1820.92
KEY 2010  7  1802.40
KEY 2010  8  1813.83
KEY 2010  9  1845.69
KEY 2010 10  1860.03
KEY 2010 11  1862.18
KEY 2010 12  1869.78
KEY 2011  1  1869.32
KEY 2011  2  1872.53
KEY 2011  3  1870.25
KEY 2011  4  1856.38
KEY 2011  5  1858.17
KEY 2011  6  1842.59
KEY 2011  7  1818.48
KEY 2011  8  1811.70
KEY 2011  9  1829.73
KEY 2011 10  1859.89
KEY 2011 11  1867.53
KEY 2011 12  1860.07
KEY 2012  1  1858.69
KEY 2012  2  1862.19
KEY 2012  3  1861.00
KEY 2012  4  1857.13
KEY 2012  5  1843.06
KEY 2012  6  1828.17
KEY 2012  7  1819.30
KEY 2012  8  1812.33
KEY 2012  9  1833.24
KEY 2012 10  1875.11
KEY 2012 11  1885.58
KEY 2012 12  1869.71
KEY 2013  1  1862.11
KEY 2013  2  1873.68
KEY 2013  3  1880.85
KEY 2013  4  1866.73
KEY 2013  5  1847.19
KEY 2013  6  1833.90
KEY 2013  7  1822.84
KEY 2013  8  1821.35
KEY 2013  9  1835.00
KEY 2013 10  1863.36
KEY 2013 11  1876.85
KEY 2013 12  1876.00
KEY 2014  1  1877.69
KEY 2014  2  1879.51
KEY 2014  3  1884.28
KEY 2014  4  1882.45
KEY 2014  5  1870.59
KEY 2014  6  1854.17
KEY 2014  7  1837.40
KEY 2014  8  1830.93
KEY 2014  9  1837.17
KEY 2014 10  1866.92
KEY 2014 11  1885.24
KEY 2014 12  1877.70
KEY 2015  1  1896.93
KEY 2015  2  1901.87
KEY 2015  3  1884.82
KEY 2015  4  1887.16
KEY 2015  5  1875.40
KEY 2015  6  1849.17
KEY 2015  7  1840.30
KEY 2015  8  1840.39
KEY 2015  9  1846.32
KEY 2015 10  1871.48
KEY 2015 11  1879.75
KEY 2015 12  1889.20
KEY 2016  1  1911.92
KEY 2016  2  1914.33
KEY 2016  3  1920.64
KEY 2016  4  1917.26
KEY 2016  5  1896.77
KEY 2016  6  1869.20
KEY 2016  7  1850.54
KEY 2016  8  1855.93
KEY 2016  9  1873.31
KEY 2016 10  1907.64
KEY 2016 11  1933.82
KEY 2016 12  1924.97
KEY 2017  1  1913.70
KEY 2017  2  1906.22
KEY 2017  3  1903.52
KEY 2017  4  1900.79
KEY 2017  5  1875.92
KEY 2017  6  1856.74
KEY 2017  7  1855.48
KEY 2017  8  1855.02
KEY 2017  9  1862.92
KEY 2017 10  1884.43
KEY 2017 11  1909.36
KEY 2017 12  1910.27
KEY 2018  1  1909.92
KEY 2018  2  1918.44
KEY 2018  3  1918.86
KEY 2018  4  1912.03
KEY 2018  5  1890.66
KEY 2018  6  1871.80
KEY 2018  7  1888.48
KEY 2018  8  1892.60
KEY 2018  9  1888.94
KEY 2018 10  1907.59
KEY 2018 11  1917.93
KEY 2018 12  1938.06
KEY 2019  1  1937.76
KEY 2019  2  1917.93
KEY 2019  3  1922.06
KEY 2019  4  1923.15
KEY 2019  5  1902.26
KEY 2019  6  1883.42
KEY 2019  7  1888.48
KEY 2019  8  1894.69
KEY 2019  9  1894.51
KEY 2019 10  1909.71
KEY 2019 11  1933.88
KEY 2019 12  1933.19
KEY 2020  1  1921.37
KEY 2020  2  1921.99
KEY 2020  3  1931.64
KEY 2020  4  1951.08
KEY 2020  5  1930.56
KEY 2020  6  1893.38
KEY 2020  7  1887.57
KEY 2020  8  1888.74
KEY 2020  9  1906.91
KEY 2020 10  1935.52
KEY 2020 11  1945.19
KEY 2020 12  1951.99