Fig. 4: Environmental drivers of trends in riverine CO2 release.
From: Recent intensified riverine CO2 emission across the Northern Hemisphere permafrost region
Upscaled CO2 efflux annual anomalies (solid lines) and linear fit (dashed lines) using all drivers and iteratively excluding the temporal dynamics for each group of drivers in the Arctic (a) and Tibetan Plateau (b). The bar and doughnut chart presents the contribution percentage of climate (precipitation, air temperature), permafrost factor as ground temperature at 1 m–depth (GT), active layer thickness (ALT), vegetation and human factors. The size of the bar chart also represents the difference in slope between each test and the upscaled CO2.
