Fig. 6

Relationship between anomalous discharge components and anomalous precipitation variables. Integrated annual anomalous values, calculated in each treated simulation, are plotted for the discharge components (surface and subsurface runoff, total discharge) against the precipitation variables (snowfall, rainfall, and total precipitation) to illustrate the relationships between a surface runoff–snowfall; b surface runoff–rainfall; c subsurface runoff–snowfall; d subsurface runoff–rainfall; and e total discharge–total precipitation. Anomalies represent annual mean differences between each treated simulation and the reference simulation (Fig. 5). Values for the precipitation variables are calculated as area-weighted averages in each grid cell of the circumpolar Arctic river basins. Numbers in symbols represent experimental scenarios: 1 EX_{TA_SON}, 2 EX_{PR_SON}, 3 EX_{TA_PR_SON}, 4 EX_{TA_DJF}, 5 EX_{PR_DJF}, 6 EX_{TA_PR_DJF}, 7 EX_{TA_MAM}, 8 EX_{PR_MAM}, and 9 EX_{TA_PR_MAM}