Variation in the Canadian Fire Weather Index Thresholds for Increasingly Larger Fires in Portugal

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ID: 95307
2019
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Abstract
Forest fire management relies on fire danger rating to optimize its suite of activities. Limiting fire size is the fire management target whenever minimizing burned area is the primary goal, such as in the Mediterranean Basin. Within the region, wildfire incidence is especially acute in Portugal, a country where fire-influencing anthropogenic and landscape features vary markedly within a relatively small area. This study establishes daily fire weather thresholds associated to transitions to increasingly larger fires for individual Portuguese regions (2001–2011 period), using the national wildfire and Canadian fire weather index (FWI) databases and logistic regression. FWI thresholds variation in relation to population density, topography, land cover, and net primary production (NPP) metrics is examined through regression and cluster analysis. Larger fires occur under increasingly higher fire danger. Resistance to fire spread (the fire-size FWI thresholds) varies regionally following biophysical gradients, and decreases under more complex topography and when NPP and occupation by flammable forest or by shrubland increase. Three main clusters synthesize these relationships and roughly coincide with the western north-central, eastern north-central and southern parts of the country. Quantification of fire-weather relationships can be improved through additional variables and analysis at other spatial scales.
Reference Key
fernandes2019variationforests Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Fernandes, Paulo M.;
Journal forests
Year 2019
DOI
DOI not found
URL
https://www.mdpi.com/1999-4907/10/10/838
Keywords
Biology (General) plant ecology forestry

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