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*** Monthly and annual atmospheric CO2 record from flask measurements at          ***
*** Lampedusa Island, Italy                                                       ***
***                                                                               ***
*** April 2001                                                                    ***
***                                                                               ***
*** Source: Paolo Chamard                                                         ***
***         Luigi Ciattaglia                                                      ***
***         Alcide di Sarra                                                       ***
***         Francesco Monteleone                                                  ***
***         ENEA, GEM-CLIM                                                        ***
***         Via Anguillarese 301                                                  ***
***         00060 S. Maria di Galeria (Rome)                                      ***
***         Italy                                                                 ***
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Year  Jan.   Feb.    Mar.   Apr.   May   Jun.   Jul.   Aug.   Sep.   Oct.   Nov.   Dec.  Annual
1992 -99.99 -99.99 -99.99 -99.99 359.49 359.27 352.96 351.69 351.03 355.13 358.89 363.21 -99.99
1993 362.09 365.54 367.68 363.62 361.95 359.11 356.51 356.44 354.92 357.27 361.85 362.59 360.80
1994 361.99 364.06 364.37 366.47 364.46 359.91 357.84 356.04 356.72 359.74 359.84 363.30 361.23
1995 366.31 363.76 366.02 366.35 365.53 363.00 360.22 358.54 358.33 362.07 363.26 365.26 363.22
1996 365.59 369.06 367.08 367.43 366.46 361.33 358.99 360.37 357.89 361.84 363.23 364.62 363.66
1997 366.07 367.67 369.34 368.48 368.04 365.25 359.38 358.68 360.04 363.08 364.60 367.33 364.83
1998 368.68 369.14 370.25 369.77 367.72 367.14 365.20 364.81 364.61 368.38 369.65 370.43 367.98
1999 373.56 373.27 374.20 373.66 371.57 369.57 366.22 367.07 368.55 368.23 371.93 372.16 370.83
2000 373.40 375.80 374.20 374.47 370.73 372.84 369.15 368.43 369.23 368.21 372.53 373.29 371.86

Atmospheric CO2 mixing ratios are expressed in parts per million by volume (ppmv) and are 
relative to the dry air WMO mole fraction scale. Monthly means are derived from weekly 
measurements. Annual means are the arithmetic means of the monthly values.  Annual means 
are provided only for years with complete monthly records.  Missing values are denoted 
by -99.99.