Figure 7.

Regression slopes ((PgC yr⁻¹) K⁻¹) between interannual variations of global terrestrial NEE and of tropical mean air temperature (over 25° N–25° S land regions, without decadal variations as used in the NEE–T inversion) for five 20-year windows. NEE has been estimated by the standard inversion (hollow black bars), the NEE–T inversion with the same ‘interannual climate sensitivity’ throughout 1957–2017 (as in figure 5, orange bars), and NEE–T inversions with independent sensitivities in each of the 20-year windows (green-to-blue bars). All inversions use the ‘quasi-homogeneous’ station set s57X. Before the regression, all time series were interannually filtered, and any linear trends have been removed.