Mapping wildfire burn severity in the Arctic Tundra from downsampled MODIS data

Arctic, Antarctic, and Alpine Research
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Abstract

Wildfires are historically infrequent in the arctic tundra, but are projected to increase with climate warming. Fire effects on tundra ecosystems are poorly understood and difficult to quantify in a remote region where a short growing season severely limits ground data collection. Remote sensing has been widely utilized to characterize wildfire regimes, but primarily from the Landsat sensor, which has limited data acquisition in the Arctic. Here, coarse-resolution remotely sensed data are assessed as a means to quantify wildfire burn severity of the 2007 Anaktuvuk River Fire in Alaska, the largest tundra wildfire ever recorded on Alaska's North Slope. Data from Landsat Thematic Mapper (TM) and downsampled Moderate-resolution Imaging Spectroradiometer (MODIS) were processed to spectral indices and correlated to observed metrics of surface, subsurface, and comprehensive burn severity. Spectral indices were strongly correlated to surface severity (maximum R2 = 0.88) and slightly less strongly correlated to substrate severity. Downsampled MODIS data showed a decrease in severity one year post-fire, corroborating rapid vegetation regeneration observed on the burned site. These results indicate that widely-used spectral indices and downsampled coarse-resolution data provide a reasonable supplement to often-limited ground data collection for analysis and long-term monitoring of wildfire effects in arctic ecosystems.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Mapping wildfire burn severity in the Arctic Tundra from downsampled MODIS data
Series title Arctic, Antarctic, and Alpine Research
DOI 10.1657/1938-4246-45.1.64
Volume 45
Issue 1
Year Published 2013
Language English
Publisher Institute of Arctic and Alpine Research (INSTAAR)
Contributing office(s) Alaska Science Center Geography
Description 13 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Arctic, Antarctic, and Alpine Research
First page 64
Last page 76
Country United States
State Alaska
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