Paleofire reconstruction based on an ensemble-member strategy applied to sedimentary charcoal


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Blarquez, Olivier, Girardin, Martin P., Leys, Bérangère, Ali, Adam A., Aleman, Julie C., Bergeron, Yves et Carcaillet, Christopher (2013). Paleofire reconstruction based on an ensemble-member strategy applied to sedimentary charcoal. Geophysical Research Letters , 40 (11). pp. 2667-2672. doi:10.1002/grl.50504 Repéré dans Depositum à

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Paleofire events obtained from the statistical treatment of sedimentary charcoal records rely on a number of assumptions and user's choices, increasing the uncertainty of reconstructio\ns. Among the assumptions made when analyzing charcoal series is the choice of a filtering method for raw Charcoal Accumulation Rate (CHARraw). As there is no ultimate CHAR raw filtering method, we propose an ensemble-member approach to reconstruct fire events. We modified the commonly used procedure by including a routine replicating the analysis of a charcoal record using custom smoothing parameters. Dates of robust fire events, uncertainties in fire-return intervals and fire frequencies are derived from members' distributions. An application of the method is used to quantify uncertainties due to data treatment in two CHARraw sequences from two different biomes, subalpine and boreal.

Type de document: Article
Mots-clés libres: Charcoal; Paleofire; Sediment
Divisions: Forêts
Date de dépôt: 13 mai 2020 15:33
Dernière modification: 13 mai 2020 15:33

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