Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/28883
Title: Wildfires in boreal ecoregions : Evaluating the power law assumption and intra-annual and interannual variations
Authors: Lehsten, Veiko
de Groot, William J.
Flannigan, Mike
George, Charles
Harmand, Peter
Balzter, Heiko
First Published: 10-Jan-2014
Publisher: American Geophysical Union (AGU)
Citation: Journal of Geophysical Research : Biogeosciences, 2014, 119 (1), pp. 14-23
Abstract: Wildfires are a major driver of ecosystem development and contributor to carbon emissions in boreal forests. We analyzed the contribution of fires of different fire size classes to the total burned area and suggest a novel fire characteristic, the characteristic fire size, i.e., the fire size class with the highest contribution to the burned area, its relation to bioclimatic conditions, and intra-annual and interannual variation. We used the Canadian National Fire Database (using data from 1960 to 2010) and a novel satellite-based burned area data set (2001 to 2011). We found that the fire size distribution is best explained by a normal distribution in log space in contrast to the power law-based linear fire area relationship which has prevailed in the literature so far. We attribute the difference to previous studies in the scale invariance mainly to the large extent of the investigated ecoregion as well as to unequal binning or limiting the range at which the relationship is analyzed; in this way we also question the generality of the scale invariance for ecoregions even outside the boreal domain. The characteristic fire sizes and the burned area show a weak correlation, indicating different mechanisms behind each feature. Fire sizes are found to depend markedly on the ecoregion and have increased over the last five decades for Canada in total, being most pronounced in the early season. In the late season fire size and area decreased, indicating an earlier start of the fire season.
DOI Link: 10.1002/2012JG002252
ISSN: 2169-8953
eISSN: 2169-8961
Links: http://onlinelibrary.wiley.com/doi/10.1002/2012JG002252/abstract;jsessionid=C7EC5DA485E9E9C0E72B6DA39397DDF2.f04t02
http://hdl.handle.net/2381/28883
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2013, The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Appears in Collections:Published Articles, Dept. of Geography

Files in This Item:
File Description SizeFormat 
Lehsten_JGRBG_2014_Wildfires_Canada.pdfPublished (publisher PDF)1.13 MBUnknownView/Open


Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.