Modelling the meteorological forest fire niche in heterogeneous pyrologic conditions

PLoS One. 2015 Feb 13;10(2):e0116875. doi: 10.1371/journal.pone.0116875. eCollection 2015.

Abstract

Fire regimes are strongly related to weather conditions that directly and indirectly influence fire ignition and propagation. Identifying the most important meteorological fire drivers is thus fundamental for daily fire risk forecasting. In this context, several fire weather indices have been developed focussing mainly on fire-related local weather conditions and fuel characteristics. The specificity of the conditions for which fire danger indices are developed makes its direct transfer and applicability problematic in different areas or with other fuel types. In this paper we used the low-to-intermediate fire-prone region of Canton Ticino as a case study to develop a new daily fire danger index by implementing a niche modelling approach (Maxent). In order to identify the most suitable weather conditions for fires, different combinations of input variables were tested (meteorological variables, existing fire danger indices or a combination of both). Our findings demonstrate that such combinations of input variables increase the predictive power of the resulting index and surprisingly even using meteorological variables only allows similar or better performances than using the complex Canadian Fire Weather Index (FWI). Furthermore, the niche modelling approach based on Maxent resulted in slightly improved model performance and in a reduced number of selected variables with respect to the classical logistic approach. Factors influencing final model robustness were the number of fire events considered and the specificity of the meteorological conditions leading to fire ignition.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Fires*
  • Forests*
  • Models, Theoretical
  • Risk
  • Switzerland
  • Weather*

Grants and funding

This work was supported by the European Project ALP FFIRS, funded by the European Regional Development fund of Alpine Space Program, and by Canton Ticino, Valais and BAFU. It was also partly supported by BAFU/WSL Swiss program forest and climate change. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.