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*** Atmospheric CO2-curve values (ppmv) derived from flask air   ***
*** samples collected at Baja California Sur, Mexico             *** 
***                                                              ***
*** Source: R. F. Keeling, S. C. Piper, A. F. Bollenbacher       ***
***             and S. J. Walker                                 ***
***         Carbon Dioxide Research Group                        ***
***         Scripps Institution of Oceanography (SIO)            ***
***         University of California                             ***
***         La Jolla, California USA 92093-0444                  ***
***                                                              ***
*** May 2008                                                     ***
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	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann. Ave.
1997		366.36	367.17	368.13	368.72	367.12	364.19	362.47	362.20	362.86	364.53	365.94	
1998	366.84	367.90	368.82	369.91	370.66	369.24	366.49	364.94	364.84	365.62	367.39	368.86	367.63
1999	369.76	370.77	371.59	372.53	373.10	371.46	368.49	366.75	366.46	367.10	368.76	370.15	369.74
2000	371.01	372.02	372.89	373.90	374.52	372.94	370.09	368.46	368.27	368.98	370.68	372.08	371.32
2001	372.93	373.91	374.72	375.66	376.23	374.61	371.66	369.91	369.63	370.26	371.89	373.26	372.89
2002	374.09	375.08	375.91	376.91	377.57	376.06	373.24	371.66	371.55	372.36	374.19	375.74	374.53
2003	376.76	377.93	378.91	380.04	380.80	379.36	376.55	374.93	374.75	375.45	377.14	378.52	377.60
2004	379.35	380.31	381.14	382.08	382.64	381.00	378.09	376.41	376.18	376.86	378.55	379.96	379.38
2005	380.85	381.90	382.79	383.84	384.54	383.06	380.23	378.61	378.45	379.18	380.93	382.38	381.40
2006	383.29	384.35	385.23	386.26	386.92	385.40	382.53	380.87	380.68	381.40	383.14	384.60	383.72
2007	385.52	386.58	387.47	388.52	389.21	387.71	384.87	383.25	383.09	383.83	385.58	387.05	386.06
 
Values above are taken from a curve consisting of 4 harmonics plus a stiff spline and a linear gain factor, fit
to monthly concentration values adjusted to represent 2400 hours on the 15th day of each month.  Data used to
derive this curve are shown in the accompanying graph.  Units are parts per million by volume (ppmv) expressed 
in the 2003A SIO manometric mole fraction scale. The "annual average" is the arithmetic mean of the twelve
monthly values.