Fig. 6

Climate and fire regime envelopes for the contiguous USA A, B; all wilderness areas in the contiguous USA C, D; and only wilderness areas in our sample E, F. Grey shading in the lefthand maps show the spatial extent of pixels contributing to each row. Envelopes are approximated by 2D density plots (orange) with actual values shown by black dots. Data in E and F are proportional to the number of times a wilderness area was included in the sample (i.e., if a wilderness area was included 10 times in the sample, each pixel value from that wilderness area is also included 10 times)