P0031.1

AIR_classification

P0031.1 product shows the molar fraction over time as well as the trend, smoothed curved and growth rate (from NOAA's fit function; see CCGCRV man page for details) for all the data and for either the marine data or the continental data.

The data are classified as marine or continental using sectors defines in advance for the sire and the wind direction measurements (for details on the classification method, see "Atmospheric CO2 concentration variations recorded at Mace Head, Ireland, from 1992 to 1994", Bousquet et al., 1996, https://doi.org/10.1016/S0079-1946(97)81145-7)