Fig. 1From: Toward a long-term atmospheric CO2 inversion for elucidating natural carbon fluxes: technical notes of NISMON-CO2 v2021.1Illustration of flux conversion from latitude–longitude grids to icosahedral grids. The black line indicates the boundaries of the icosahedral grids, while the dark-gray and light-gray lines represent original and finer latitude–longitude grids, respectively. In the conversion, fluxes in colored areas are allocated to the centered icosahedral gridBack to article page