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*** Atmospheric CO2 concentrations (ppmv) derived from flask air   ***
*** samples collected at Cape Ferguson, Australia                  ***
*** Source: L.P. Steele                                            ***
***              P.B. Krummel                                      ***  
***              R. L. Langenfelds,                                ***
***              Atmospheric, Research, Commonwealth Scientific,   ***
***              And Industrial Research Organisation,             ***
***              Aspendale, Victoria,                              *** 
***              Australia  3195                                   ***                   
***                                                                ***   
*** August 2007                                                    ***
***                                                                ***
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Month	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Ann. Ave.
1991							353.17	353.17	354.50	355.58	355.12	355.10	
1992	354.84	354.35	354.12	354.00	354.09	353.58	354.11	355.44	356.26	356.15	355.83	355.83	354.88
1993	355.27	354.87	354.57	354.36	354.66	355.35	355.98	355.76	355.80	356.10	356.07	357.48	355.52
1994	357.79	356.08	355.61	355.64	355.36	355.74	356.28	356.73	357.10	358.40	359.38	358.67	356.90
1995	358.43	358.22	357.96	358.46	359.02	359.06	358.34	358.43	359.42	359.89	360.29	360.67	359.02
1996	361.35	361.99	361.83	361.60	360.77	359.86	360.19	360.86	360.99	360.60	360.79	361.36	361.02
1997	361.09	360.87	360.60	360.93	362.65	362.16	360.46	362.10	363.87	363.68	363.49	363.96	362.16
1998	364.84	364.50	364.12	365.16	365.29	365.29	365.27	364.91	365.89	367.02	366.83	366.30	365.45
1999	365.76	365.70	365.62	364.70	364.41	365.23	365.77	366.13	366.46	366.52	366.83	366.96	365.84
2000	366.72	366.20	365.96	366.16	368.20	369.92	367.90	367.05	368.66	369.10	369.09	369.84	367.90
2001	368.58	366.99	367.71	368.22	368.26	368.85	369.47	370.16	370.25	370.41	371.51	371.11	369.29
2002	370.39	370.67	370.11	369.96	370.99	371.73	371.83	371.80	371.92	372.31	372.56	372.60	371.41
2003	372.64	372.75	372.47	372.06	372.62	373.06	373.12	374.29	374.39	373.66	374.03	375.10	373.35
2004	376.18	375.37	374.34	374.86	375.29	374.70	374.97	375.71	375.28	375.50	376.51	376.29	375.42
2005	375.89	376.19	376.02	376.26	377.64	378.58	378.16	377.81	377.51	377.81	378.75	378.93	377.46
2006	378.88	378.75	378.59	378.27	377.69	377.95	379.05	379.53	379.23	379.28	379.89	379.92	378.92

Monthly values are expressed in parts per million (ppm) and reported in the WMO CO2 
Mole Fraction Scale (Zhao et al., 1997, J. Geophys. Res. 102 , 5885-5894). Calibration 
details are discussed by Francey et al. (2003).  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.