Figure 4 | Scientific Reports

Figure 4

From: Short-interval fires increasing in the Alaskan boreal forest as fire self-regulation decays across forest types

Figure 4

Trends in reburning by cover type for two reburning windows, ≤ 10 years (left) and ≤ 20 years (right). (A) Percentage of the total landscape that has burned in a reburn (2 + fires) by year of second burn. Note differing y-axis scales. (B) Proportion of reburns by cover type. Note that for some years no reburns in the interval were recorded, so the scale is discontinuous (≤ 10 year group). (C) Trend in conifer proportion burned over time (linear regression, weighted by number of observations in a year, noted with graduated circles: larger circles indicate more fires in that year). For the ≤ 10 year interval, there is no trend. For the ≤ 20 year interval, the trend is significant. Range limited to either 10 or 20 years after initial observation to decrease bias due to fires prior to the observation period.

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