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Average ecoregion burned area fraction per year from 1997–2016 for (a) forests, and (b) non-forests. The duration of the fire season (in months) is shown in panel (c) and ending month of the fire season shown in panel (d). Grayed out are ecoregions that comprised <0.001% of either forest or non-forested burned area or where land cover was <20% forest or non-forest. Maps are provided in an Eckert IV equal-area projection.
