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*** Atmospheric CH4 concentrations (ppbv) derived from flask       ***
*** samples collected at Cape Ferguson, Australia                  ***
*** Source: L.P. Steele                                            ***
***              P.B. Krummel                                      ***  
***              R.L. Langenfelds                                  ***
***              Commonwealth Scientific,                          ***
***              and Industrial Research Organisation,             ***
***              Aspendale, Victoria,                              *** 
***              Australia  3195                                   ***                   
***                                                                ***   
*** January 2003                                                   ***
***                                                                ***
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Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann Ave

1991							1662.19	1666.99	1674.18	1675.96	1670.56	1669.87	
1992	1661.98	1652.95	1655.63	1662.66	1675.54	1685.08	1683.42	1684.51	1689.99	1685.61	1673.23	1665.61	1673.0175
1993	1659.66	1656.47	1659.45	1665.29	1670.43	1675.13	1682.82	1687.61	1685.99	1679.32	1674.41	1674.3	1672.573333
1994	1665.21	1657.69	1661.62	1667.32	1676.68	1684.91	1684.17	1682.96	1687.09	1688.71	1682.72	1674.23	1676.109167
1995	1667.94	1668.34	1672.44	1674.58	1679.34	1687.87	1693.55	1697.21	1697.15	1692.06	1685.95	1678.65	1682.923333
1996	1676.42	1681.3	1680.42	1679.78	1685.64	1690.22	1692.16	1696.98	1698.51	1692.61	1688.91	1683.77	1687.226667
1997	1675.31	1674.97	1679.68	1685.34	1696.76	1704.46	1705.85	1707.35	1705.42	1702.62	1697.04	1688.73	1693.6275
1998	1683.46	1682.08	1684.79	1693.64	1701.87	1708.37	1714.72	1715.67	1717.16	1716.94	1711.17	1705.73	1702.966667
1999	1698.26	1693.23	1698.82	1712.08	1716.7	1715.75	1722.44	1727.08	1723.22	1717.17	1713.34	1705.58	1711.9725
2000	1696.01	1697.44	1698.81	1699.43	1713.46	1730.33	1729.4	1721.13	1720.65	1718.2	1714.17	1711.65	1712.556667
2001	1706.83	1704.45	1700.4	1700.13	1714.48	1725.37	1723.25	1721.75	1720.52	1719	1717.41	1705.1	1713.224167

Monthly values are expressed in parts per billion by volume (ppbv) and reported in the CSIRO94 CH4 Scale 
[Steele, et al., 1996, pp. 107-110, in: Baseline Atmospheric Program (Australia) 1994-95, edited 
by R.J.Francey, A.L. Dick, and N. Derek]. Monthly values are calculated as the mean of the daily values 
from a smooth curve fit to the data using curve-fitting routines described by Thoning et al., 1989 
(J. Geophys. Res. 94, 8549-8565). Annual values are the arithmetic means of the 12 monthly values.