Fig. 3: Gaseous C emissions and OC burial in global reservoirs.
From: Global carbon budget of reservoirs is overturned by the quantification of drawdown areas
a, Emission and burial expressed as annual teragrams of C. b, Emission and burial expressed as CO2e fluxes. Green ribbon indicates the potential range of buried CO2e assuming conversion of OC between 100% CO2 (lower bound) and 50% both CO2 and CH4 (upper bound). a,b, CO2 and CH4 emission: emissions from reservoirs comprising both drawdown area and water surface. Total emission: sum of CO2 and CH4 emissions. Vertical dot–dashed line indicates current global estimate of reservoir drawdown (15%). Shaded areas represent 95% CIs. c–e, Probability density functions as derived by Taylor series expansion and Monte Carlo uncertainty propagation. c, CO2-C emission from global reservoirs (Cohen’s D effect size = 2.6). d, GHG emission expressed as CO2e fluxes (Cohen’s D effect size = 0.1). e, Ratio between C emission and OC burial in reservoirs (Cohen’s D effect size = 1.2). C emission is the sum of CO2-C and CH4-C emission. The dashed line indicates ratio = 1. c–e, The estimate without drawdown area (red curve) is assuming the total reservoir area to be inundated while the blue curve is considering the desiccation of the drawdown area. Densities are derived by 100,000 Monte Carlo simulations (Extended Data Fig. 10).
