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Quantification et modélisation de l'évolution du régime des feux au cours de l'Holocène et de l'Anthropocène en Corse

Abstract : In the Mediterranean Basin, Corsica houses some of the best preserved ecosystems in terms of habitat richness and vegetation type. It is also the French region the most affected by forest fires. Recent years of pastoral spending and global warming have greatly increased the probability of occurrence and spread of fire. In this context, the purpose of this thesis is to understand the causes and mechanisms of the fire regime in Corsica during the Holocene and to propose a prospective reading. The results of this work are those that started from the beginning of the Holocene and contributed to the diversification and diversification of the Mediterranean ecosystem. 6,000 to 5,000 years ago, when climatic conditions are less favourable for propagation and forest fires, agro-pastoral activities using the main agents of development of the disaster, are currently in Corsica. This work also proposes the use of the MDC to reconstruct the climatic conditions of fire hazard during the Holocene and thus define the reference values in known environmental contexts. On the way of this place, one begins to be Holocene with a climate earlier today, with sunshine and strong also that explains a fire regime passed at this time. However, the duration of the fire season (FSL) was limited to a hundred days. Whatever the evolution of climatic conditions scenario proposed by the IPCC for the current century, fire hazards calculated from the MDC and the FSL strongly increase. The MDC found comparable values at the beginning of the Holocene without being exceeded while the duration of the fire season (FSL) extended well beyond durations. We will then face the first time with a simultaneous increase in drought and human activities, which will increase the number of unprecedented days.
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Marion Lestienne. Quantification et modélisation de l'évolution du régime des feux au cours de l'Holocène et de l'Anthropocène en Corse. Climatologie. Université Bourgogne Franche-Comté, 2019. Français. ⟨NNT : 2019UBFCD052⟩. ⟨tel-02555105⟩

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