KimRouletLiEtAl2016

Référence

Kim, Y., Roulet, N.T., Li, C., Frolking, S., Strachan, I.B., Peng, C., Teodoru, C.R., Prairie, Y.T., Tremblay, A. (2016) Simulating carbon dioxide exchange in boreal ecosystems flooded by reservoirs. Ecological Modelling, 327:1-17. (Scopus )

Résumé

A process-based reservoir model of Flooded Forest Denitrification Decomposition (FF-DNDC) was developed to simulate carbon dioxide (CO2) exchange from flooded boreal landscapes. The reservoir model is based on Forest-DNDC, a terrestrial biogeochemistry model which supports detailed soil carbon (C) processes including redox chemistry, with modification to represent the disturbed soil and vegetation C dynamics due to the presence of an overlying water column on the ecosystems. Soil decomposition rates and temperature and oxygen profiles were changed, and sedimentation to the soil surface was added. FF-DNDC was evaluated using CO2 exchange measurements from the newly created Eastmain-reservoir in northern Quebec, Canada. For the first four years of the reservoir (2006 to 2009), simulated daily CO2 emissions averaged 1.42 g C m-2 d-1 (ranging from 0.75 to 3.24 g C m-2 d-1) from the flooded forest and 0.74 g C m-2 d-1 (ranging from 0.51 to 1.09 g C m-2 d-1) from the flooded peatland. The simulated emissions were smaller than the thin-filmed boundary layer exchanges based on measured partial pressure of carbon dioxide (pCO2) but were larger than the exchanges measured using an eddy covariance system. However, the temporal patterns of simulated and measured exchanges were similar. We simulated potential CO2 emissions over 100 years, the expected operating lifetime of the reservoir, with assuming no change in climate. Simulated CO2 emissions decreased with time since flooding especially for the first four decades. The 100-year cumulative emissions from the flooded peatland were larger than those from the flooded forest. Sensitivity analysis indicated that vegetation and soil inputs and parameters controlling the quality and/or quantity of decomposable soil C in flooded ecosystems (e.g. woody vegetation biomass, soil organic carbon in organic and mineral layers, and carbon:nitrogen ratio in woody vegetation and soil) were important to the reservoir CO2 emission. © 2016 Elsevier B.V.

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@ARTICLE { KimRouletLiEtAl2016,
    AUTHOR = { Kim, Y. and Roulet, N.T. and Li, C. and Frolking, S. and Strachan, I.B. and Peng, C. and Teodoru, C.R. and Prairie, Y.T. and Tremblay, A. },
    TITLE = { Simulating carbon dioxide exchange in boreal ecosystems flooded by reservoirs },
    JOURNAL = { Ecological Modelling },
    YEAR = { 2016 },
    VOLUME = { 327 },
    PAGES = { 1-17 },
    NOTE = { cited By 0 },
    ABSTRACT = { A process-based reservoir model of Flooded Forest Denitrification Decomposition (FF-DNDC) was developed to simulate carbon dioxide (CO2) exchange from flooded boreal landscapes. The reservoir model is based on Forest-DNDC, a terrestrial biogeochemistry model which supports detailed soil carbon (C) processes including redox chemistry, with modification to represent the disturbed soil and vegetation C dynamics due to the presence of an overlying water column on the ecosystems. Soil decomposition rates and temperature and oxygen profiles were changed, and sedimentation to the soil surface was added. FF-DNDC was evaluated using CO2 exchange measurements from the newly created Eastmain-reservoir in northern Quebec, Canada. For the first four years of the reservoir (2006 to 2009), simulated daily CO2 emissions averaged 1.42 g C m-2 d-1 (ranging from 0.75 to 3.24 g C m-2 d-1) from the flooded forest and 0.74 g C m-2 d-1 (ranging from 0.51 to 1.09 g C m-2 d-1) from the flooded peatland. The simulated emissions were smaller than the thin-filmed boundary layer exchanges based on measured partial pressure of carbon dioxide (pCO2) but were larger than the exchanges measured using an eddy covariance system. However, the temporal patterns of simulated and measured exchanges were similar. We simulated potential CO2 emissions over 100 years, the expected operating lifetime of the reservoir, with assuming no change in climate. Simulated CO2 emissions decreased with time since flooding especially for the first four decades. The 100-year cumulative emissions from the flooded peatland were larger than those from the flooded forest. Sensitivity analysis indicated that vegetation and soil inputs and parameters controlling the quality and/or quantity of decomposable soil C in flooded ecosystems (e.g. woody vegetation biomass, soil organic carbon in organic and mineral layers, and carbon:nitrogen ratio in woody vegetation and soil) were important to the reservoir CO2 emission. © 2016 Elsevier B.V. },
    AUTHOR_KEYWORDS = { Benthic decomposition; Boreal hydroelectric reservoir; Carbon dioxide exchange; Forest-DNDC; Reservoir ecosystem modeling },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.ecolmodel.2016.01.006 },
    KEYWORDS = { Boundary layers; Climate change; Ecology; Ecosystems; Floods; Forestry; Organic carbon; Quality control; Reservoirs (water); Sensitivity analysis; Soils; Vegetation; Wetlands, Carbon dioxide exchange; Cumulative emissions; Eddy covariance systems; Forest-DNDC; Hydroelectric reservoirs; Reservoir ecosystems; Soil organic carbon; Terrestrial biogeochemistries, Carbon dioxide },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84957956045&partnerID=40&md5=cb0f87ffa4c2bc58ed8ef86503523874 },
}

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