Articles | Volume 18, issue 11
https://doi.org/10.5194/bg-18-3263-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-3263-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Jun 2021
Research article |
| 02 Jun 2021
| 02 Jun 2021
Simulating shrubs and their energy and carbon dioxide fluxes in Canada's Low Arctic with the Canadian Land Surface Scheme Including Biogeochemical Cycles (CLASSIC)
Gesa Meyer
CORRESPONDING AUTHOR
Environment and Climate Change Canada, Climate Research Division, Victoria, BC, Canada
Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada
Elyn R. Humphreys
Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada
Joe R. Melton
Environment and Climate Change Canada, Climate Research Division, Victoria, BC, Canada
Alex J. Cannon
Environment and Climate Change Canada, Climate Research Division, Victoria, BC, Canada
Peter M. Lafleur
School of Environment, Trent University, Peterborough, ON, Canada
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This study evaluates how well the CLASSIC land surface model reproduces the energy, water, and carbon cycle when compared against a wide range of global observations. Special attention is paid to how uncertainties in the data used to drive and evaluate the model affect model skill. Our results show the importance of incorporating uncertainties when evaluating land surface models and that failing to do so may potentially misguide future model development.
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Short summary
Shrub and sedge plant functional types (PFTs) were incorporated in the land surface component of the Canadian Earth System Model to improve representation of Arctic tundra ecosystems. Evaluated against 14 years of non-winter measurements, the magnitude and seasonality of carbon dioxide and energy fluxes at a Canadian dwarf-shrub tundra site were better captured by the shrub PFTs than by previously used grass and tree PFTs. Model simulations showed the tundra site to be an annual net CO2 source.
Shrub and sedge plant functional types (PFTs) were incorporated in the land surface component of...
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