Modelling peatland development in high-boreal Quebec, Canada, with DigiBog_Boreal

Ramirez, Jorge A.; Peleg, Nadav; Baird, Andy J.; Young, Dylan M.; Morris, Paul J.; Larocque, Marie et Garneau, Michelle (2023). « Modelling peatland development in high-boreal Quebec, Canada, with DigiBog_Boreal ». Ecological Modelling, 478, p. 110298.

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Résumé

DigiBog is a numerical model that simulates peat accumulation in temperate peatlands. Here, we modify DigiBog for boreal peatlands (DigiBog_Boreal) by accounting for snow cover, short growing seasons and groundwater exchanges between the peat and the aquifer. DigiBog_Boreal is then used to replicate ∼6500 years of peat accumulation at two high boreal latitude peatlands in Quebec, Canada. DigiBog_Boreal was driven with a weather generator and climate models, while peat cores from the sites were used to develop initial conditions and calibrate DigiBog_Boreal. Our results demonstrate that DigiBog_Boreal can replicate well peat thickness and age-depth profiles but cannot produce long-term fluctuations in water-table depths. Here, a possible explanation for DigiBog_Boreal's underperformance is the stability in the climatic drivers and less likely the new model developments. The results also indicate that peat decomposition and accumulation in DigiBog_Boreal are sensitive to water stored on the peat surface.

Type:	Article de revue scientifique
Informations complémentaires:	© 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Mots-clés ou Sujets:	Peatland, DigiBog model, high boreal latitudes, ecohydrology, Holocene, carbon dynamics
Unité d'appartenance:	Centres institutionnels > Centre de recherche en géochimie et géodynamique (GEOTOP) Centres institutionnels > Groupe de recherche interuniversitaire en limnologie et en environnement aquatique (GRIL) Faculté des sciences > Département des sciences de la Terre et de l'atmosphère
Déposé par:	Marie Larocque
Date de dépôt:	16 févr. 2023 09:29
Dernière modification:	16 févr. 2023 09:29
Adresse URL :	http://archipel.uqam.ca/id/eprint/16331

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