Fig. 3
From: Model sensitivity limits attribution of greenhouse gas emissions to polar bear demographic rates
Difference in number of calculated ice-free days (IFD) between the Amstrup and Bitz scenario (i.e., using the boundary definition from Amstrup and Bitz21, a 30% sea ice concentration threshold to define sea ice extent, and a 30% IFD threshold) and the other scenarios we considered in our analysis. Values > 0 indicate higher estimates of IFD for the Amstrup and Bitz scenario than the scenario it is being compared to. There are no 30% ice extent or 30% IFD thresholds in the left panel plots because those represent the Amstrup and Bitz scenario that is being compared to the other scenarios. Chukchi refers to results for the Chukchi Sea subpopulation, and Southern Beaufort refers to results for the Southern Beaufort Sea subpopulation. Boundary definition is indicated by “AmBi” and “Rode” to indicate the boundary definitions used in Amstrup and Bitz21 and Rode et al.23, respectively.
