Extended Data Table 2 The UVplant meta-analyses that informed our simulations
From: The Montreal Protocol protects the terrestrial carbon sink
- Four meta-analyses9,10,11,12 of plant responses to plant-weighted UV-B radiation (UVplant), which cover a range of plant types and geographies, informed the quantitative responses (percentage change in plant biomass for a 10% increase in UVplant) in the sensitivity analysis of our model. The table summarizes the UVplant exposures (percentage above ambient) that each of the meta-analyses consider, the mean plant response (across aboveground biomass, all biomass and/or leaf area), and the inferred minimum plant response (percentage response for 10% increase in UVplant) from those ranges, which is calculated from the maximum of the range divided by mean response.
- *Because in ref. 11 the meta-analysis are divided in terms of simulated ozone depletions, we estimated the equivalent in terms of increases in UVplant using the widely cited value of 2.0 for the radiation amplification factor.
- †Ref. 9 includes field experiments using filters that reduced UVplant below ambient.
- ‡The cited means are those cited in each meta-analysis for a given range of increases in UVplant.
- §UV response strengths (percentage change in plant biomass for a 10% increase in UVplant) is calculated assuming that all experiments within a given category used the maximum increase in UVplant, resulting in the most conservative estimate of UV response strength.
- ‖These values are derived from the regressions in ref. 9. The plot for aboveground biomass is the basis of the “3% reduction in biomass for a 10% increase in UVplant” proposed in ref. 8, which is a rounded value of the slope of the relationship (−3.2) in our regression analysis of ref. 9.
- ¶In ref. 11, these values are cited for two different analyses of the full range of UVplant increases (20%–100%) in the meta-analysis.
- #In ref. 12, different ranges of UVplant treatments are not separated, but the supplementary data indicate that the experiments analysed used enhancements of 5%–80% above ambient.
