**********************************************************************
*** Atmospheric H2 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                                   ***                   
***                                                                ***   
*** March 2003                                                     ***
***                                                                ***
**********************************************************************

Year	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Ann. Ave.

1992		529.15	522.83	516.51	496.59	487.05	499.19	498.56	501.37	514.2	521.59	522.77	
1993	521.73	520.14	517.94	516.51	513.54	508.76	501.28	502.8	513.69	517.62	517.12	516.09	513.94
1994	519.72	524.49	522.6	515.09	498.79	489.44	502	514.38	518.16	521.37	525.98	531.24	515.27
1995	530.38	526.98	524.41	522.28	520.99	513.65	504.45	510.08	519.08	526.73	535.68	536.23	522.58
1996	531.41	524.84	522.61	522.2	519.72	516.9	516.42	518.7	522.84	526.99	524.96	525.01	522.72
1997	531.36	533.4	533.81	529.04	514	507.42	507.04	508.73	517.03	525.58	533.77	536.81	523.17
1998	535.43	535.89	534.16	528.03	523.22	510.01	505.53	523.03	531.74	531.15	535.12	538.64	527.66
1999	539.54	540.14	535.8	522.01	517.43	522.22	519.13	521.42	533.33	539.87	538.93	536.26	530.51
2000	536.81	537.48	535.56	532.33	527.39	518.96	510.27	512.19	523.18	533.08	534.88	532.99	527.93
2001	532.41	530.24	530.23	528.6	519.48	507.96	511.66	527.22	534.25	536.81	532.23	528.62	526.64

Monthly values are expressed in parts per billion per volume (ppbv) and reported in the CSIRO94 H2 scale. 
Monthly values were calculated as the mean of the daily values from a smooth curve fit to the data using 
the 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.