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

Author

Listed:
  • Ramirez, Jorge A.
  • Peleg, Nadav
  • Baird, Andy J.
  • Young, Dylan M.
  • Morris, Paul J.
  • Larocque, Marie
  • Garneau, Michelle

Abstract

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.

Suggested Citation

  • Ramirez, Jorge A. & Peleg, Nadav & Baird, Andy J. & Young, Dylan M. & Morris, Paul J. & Larocque, Marie & Garneau, Michelle, 2023. "Modelling peatland development in high-boreal Quebec, Canada, with DigiBog_Boreal," Ecological Modelling, Elsevier, vol. 478(C).
    • Handle: RePEc:eee:ecomod:v:478:y:2023:i:c:s0304380023000261
    DOI: 10.1016/j.ecolmodel.2023.110298
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