Fig. 7: Changes in dryland GPP due to expansion and conversions.
From: Accelerated dryland expansion regulates future variability in dryland gross primary production
It is estimated from our study that the global dryland gross primary production (GPP) will increase by 12% in 2085–2100 relative to the 2000–2014 baseline under RCP4.5. Taking 12% as 100 units, the magnitudes in the diagram thus denote the percentage of the contribution caused by each process to this 12% change. The sum of all the numbers in the diagram is equal to 100%. Positive values indicate the increased GPP for the corresponding dryland subtypes and negative values indicate the decreased GPP for the corresponding dryland subtypes. For example, −31.5% means a reduction in the GPP contribution to the 12% change for the subhumid subtype due to its conversion to humid lands, 151.1% means an increase in the GPP contribution to the 12% change for the subhumid subtype due to its conversion of humid lands to the subhumid subtype, and −10.9% means a reduction in the GPP contribution to the 12% change for the subhumid subtype due to its degradation within its subtype. Note that changes in GPP in humid regions are not the focus in this study.
