Figure 1From: Fire Frequency, Area Burned, and Severity: A Quantitative Approach to Defining a Normal Fire YearCumulative distributions of fire severity for a reference area, and for areas that burned with lower and higher severities. Compared to the curve of reference severity (black), the lower severity curve (green) has few high severity pixels. Conversely, the higher severity curve (red) shows an area that burned with more higher severity pixels. These model curves are of the form: \(y = {1 \over {1 + {e^{ - (dNBR - a)}}}}\).Back to article page