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Climate change impact on future wildfire danger and activity in southern Europe: a review

Abstract : Key message: Wildfire danger and burnt areas should increase over the century in southern Europe, owing to climate warming. Fire-prone area expansion to the north and to Mediterranean mountains is a concern, while climate-induced burnt area increase might be limited by fuel availability in the most arid areas. Further studies are needed to both assess and reduce uncertainties on future trends. Context: Wildfire is the main disturbance in forested ecosystems of southern Europe. Warmer and drier conditions projected in this region are expected to profoundly affect wildfire regimes. Aims: In this review, we pursue a twofold objective: (i) report the trends in wildfire danger and activity projected under warming climate in southern Europe and (ii) discuss the limitations of these projections. Methods: We reviewed 23 projection studies that examined future wildfire danger or wildfire activity at local, regional or continental scale. Results: Under the scenarios with the highest greenhouse gas emissions, we found that projection studies estimate an increase in future fire danger and burnt areas varying, on average, from 2 to 4% and from 5 to 50% per decade, respectively. Further comparisons on the magnitude of increase remained challenging because of heterogeneous methodological choices between projection studies. We then described three main sources of uncertainty that may affect the reliability of wildfire projections: climate projections, climate-fire models and the influences of fuels, fire-vegetation feedbacks and human-related factors on the climate-fire relationships. Conclusion: We suggest research directions to address some of these issues for the purpose of refining fire danger and fire activity projections in southern Europe.
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Submitted on : Thursday, January 6, 2022 - 7:26:30 PM
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Jean-Luc Dupuy, Hélène Fargeon, Nicolas Martin-St Paul, François Pimont, Julien Ruffault, et al.. Climate change impact on future wildfire danger and activity in southern Europe: a review. Annals of Forest Science, Springer Nature (since 2011)/EDP Science (until 2010), 2020, 77 (2), pp.35. ⟨10.1007/s13595-020-00933-5⟩. ⟨hal-03166425⟩



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