reference : Impact of anthropogenic climate change on wildfire across western US forests

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reftype Journal Article
Abstract Increased forest fire activity across the western continental United States (US) in recent decades has likely been enabled by a number of factors, including the legacy of fire suppression and human settlement, natural climate variability, and human-caused climate change. We use modeled climate projections to estimate the contribution of anthropogenic climate change to observed increases in eight fuel aridity metrics and forest fire area across the western United States. Anthropogenic increases in temperature and vapor pressure deficit significantly enhanced fuel aridity across western US forests over the past several decades and, during 2000–2015, contributed to 75% more forested area experiencing high (>1 σ) fire-season fuel aridity and an average of nine additional days per year of high fire potential. Anthropogenic climate change accounted for ∼55% of observed increases in fuel aridity from 1979 to 2015 across western US forests, highlighting both anthropogenic climate change and natural climate variability as important contributors to increased wildfire potential in recent decades. We estimate that human-caused climate change contributed to an additional 4.2 million ha of forest fire area during 1984–2015, nearly doubling the forest fire area expected in its absence. Natural climate variability will continue to alternate between modulating and compounding anthropogenic increases in fuel aridity, but anthropogenic climate change has emerged as a driver of increased forest fire activity and should continue to do so while fuels are not limiting.
Author Abatzoglou, John T.; Williams, A. Park
DOI 10.1073/pnas.1607171113
Date October 18, 2016
Issue 42
Journal Proceedings of the National Academy of Sciences of the United States of America
Pages 11770-11775
Title Impact of anthropogenic climate change on wildfire across western US forests
Volume 113
Year 2016
Bibliographic identifiers
.reference_type 0
_record_number 20416
_uuid de4a77df-03ba-4319-a13f-7fdefbb353a5