Interannual to decadal changes in area burned in Canada from 1781 to 1982 and the relationship to Northern Hemisphere land temperatures
Abstract
Aim Temporal variability of annual area burned in Canada (AAB‐Can) from ad 1781 to 1982 is inferred from tree‐ring width data. Next, correlation analysis is applied between the AAB‐Can estimates and Northern Hemisphere (NH) warm season land temperatures to link recent interannual to decadal changes in area burned with large‐scale climate variations. The rationale in this use of tree rings is that annual radial increments produced by trees can approximate area burned through sensing climate variations that promote fire activity. Location The statistical reconstruction of area burned is at the scale of Canada. Methods The data base of total area burned per year in Canada is used as the predictand. A set of 53 multicentury tree‐ring width chronologies distributed across Canada is used as predictors. A linear model relating the predictand to the tree‐ring predictors is fitted over the period 1920−82. The regression coefficients estimated for the calibration period are applied to the tree‐ring predictors for as far back as 1781 to produce a series of AAB‐Can estimates. Results The AAB‐Can estimates account for 44.1% of the variance in the observed data recorded from 1920 to 1982 (92.2% after decadal smoothing) and were verified using a split sample calibration‐verification scheme. The statistical reconstruction indicates that the positive trend in AAB‐Can from c. 1970–82 was preceded by three decades during which area burned was at its lowest during the past 180 years. Correlation analysis with NH warm season land temperatures from the late 18th century to the present revealed a positive statistical association with these estimates. Main conclusions As with previous studies, it is demonstrated that the upward trend in AAB‐Can is unlikely to be an artefact from changing fire reporting practices and may have been driven by large‐scale climate variations.
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Fire activity is generally inversely correlated with vegetation productivity.
“Variation in fire danger metrics have been shown to be closely related to fuel consumption34, and fire activity is generally inversely correlated with vegetation productivity47.”
From Climate-induced variations in global wildfire danger from 1979 to 2013 (2015) · cites this paper as [47]
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Climate-induced variations in global wildfire danger from 1979 to 2013
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- Authors
- Girardin, M. P.
- Affiliations
- Canadian Forest Service (CA)
- Corresponding author
- Girardin, Martin P.
- ORCID
- Girardin, Martin P.
- Venue
- Global Ecology and Biogeography
- Publisher
- Wiley
- Published
- 2007-08-14
- Volume
- 16
- Issue
- 5
- Pages
- 557-566
- ISSN
- 1466-822X (ISSN-L)
- 1466-8238
- OpenAlex
- W2096156479
- Cited by
- 45
- References
- 50
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2023: 1 · 2021: 2 · 2020: 1 · 2018: 3 · 2017: 1 · 2016: 1 · 2015: 3 · 2014: 2 · 2013: 1 · 2012: 1
- FWCI
- 5.57
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Global Ecology and Biogeography (publishedVersion)
- Funders
- Natural Resources Canada
- Canadian Forest Service
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Tree-ring climate responses
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Keywords
- burned area, fire history, tree-ring width, paleoclimate reconstruction, fire-climate relationships, Canada, interannual to decadal variability, large-scale climate variability
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