ForCent Model Development and Testing using the Enriched Background Isotope Study (EBIS) Experiment

Parton, William; Hanson, Paul J; Swanston, Chris; Torn, Margaret S.; Trumbore, Susan E.; Riley, William J.; Kelly, Robin

doi:10.1029/2009JG001193

Title: ForCent Model Development and Testing using the Enriched Background Isotope Study (EBIS) Experiment

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Abstract

The ForCent forest ecosystem model was developed by making major revisions to the DayCent model including: (1) adding a humus organic pool, (2) incorporating a detailed root growth model, and (3) including plant phenological growth patterns. Observed plant production and soil respiration data from 1993 to 2000 were used to demonstrate that the ForCent model could accurately simulate ecosystem carbon dynamics for the Oak Ridge National Laboratory deciduous forest. A comparison of ForCent versus observed soil pool 14C signature (? 14C) data from the Enriched Background Isotope Study 14C experiment (1999-2006) shows that the model correctly simulates the temporal dynamics of the 14C label as it moved from the surface litter and roots into the mineral soil organic matter pools. ForCent model validation was performed by comparing the observed Enriched Background Isotope Study experimental data with simulated live and dead root biomass ? 14C data, and with soil respiration ? 14C (mineral soil, humus layer, leaf litter layer, and total soil respiration) data. Results show that the model correctly simulates the impact of the Enriched Background Isotope Study 14C experimental treatments on soil respiration ? 14C values for the different soil organic matter pools. Model results suggest that a two-poolmore »« less

Authors:

Parton, William ^[1]; Hanson, Paul J ^[2]; Swanston, Chris ^[3]; Torn, Margaret S. ^[4]; Trumbore, Susan E. ^[5]; Riley, William J. ^[4]; Kelly, Robin ^[1]

Colorado State University, Fort Collins
ORNL
U.S. Department of Agriculture Forest Service
Lawrence Berkeley National Laboratory (LBNL)
University of California, Irvine

Publication Date:: Fri Jan 01 00:00:00 EST 2010

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge National Environmental Research Park

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1003737

DOE Contract Number:: DE-AC05-00OR22725

Resource Type:: Journal Article

Journal Name:: Journal of Geophysical Research

Additional Journal Information:: Journal Volume: 115; Journal Issue: G4; Journal ID: ISSN 0148--0227

Country of Publication:: United States

Language:: English

Subject:: 09 BIOMASS FUELS; BIOMASS; CARBON; ECOSYSTEMS; FORESTS; HUMUS; ORGANIC MATTER; ORNL; PRODUCTION; RESPIRATION; SENSITIVITY ANALYSIS; SOILS; TESTING; VALIDATION

Citation Formats


                    Parton, William, Hanson, Paul J, Swanston, Chris, Torn, Margaret S., Trumbore, Susan E., Riley, William J., and Kelly, Robin. ForCent Model Development and Testing using the Enriched Background Isotope Study (EBIS) Experiment.  United States: N. p., 2010. 
        Web.  doi:10.1029/2009JG001193.

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                    Parton, William, Hanson, Paul J, Swanston, Chris, Torn, Margaret S., Trumbore, Susan E., Riley, William J., & Kelly, Robin. ForCent Model Development and Testing using the Enriched Background Isotope Study (EBIS) Experiment.  United States.  https://doi.org/10.1029/2009JG001193

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                    Parton, William, Hanson, Paul J, Swanston, Chris, Torn, Margaret S., Trumbore, Susan E., Riley, William J., and Kelly, Robin. 2010.  
        "ForCent Model Development and Testing using the Enriched Background Isotope Study (EBIS) Experiment".  United States.  https://doi.org/10.1029/2009JG001193.

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@article{osti_1003737,

  title        = {ForCent Model Development and Testing using the Enriched Background Isotope Study (EBIS) Experiment},

  author       = {Parton, William and Hanson, Paul J and Swanston, Chris and Torn, Margaret S. and Trumbore, Susan E. and Riley, William J. and Kelly, Robin},

  abstractNote = {The ForCent forest ecosystem model was developed by making major revisions to the DayCent model including: (1) adding a humus organic pool, (2) incorporating a detailed root growth model, and (3) including plant phenological growth patterns. Observed plant production and soil respiration data from 1993 to 2000 were used to demonstrate that the ForCent model could accurately simulate ecosystem carbon dynamics for the Oak Ridge National Laboratory deciduous forest. A comparison of ForCent versus observed soil pool 14C signature (? 14C) data from the Enriched Background Isotope Study 14C experiment (1999-2006) shows that the model correctly simulates the temporal dynamics of the 14C label as it moved from the surface litter and roots into the mineral soil organic matter pools. ForCent model validation was performed by comparing the observed Enriched Background Isotope Study experimental data with simulated live and dead root biomass ? 14C data, and with soil respiration ? 14C (mineral soil, humus layer, leaf litter layer, and total soil respiration) data. Results show that the model correctly simulates the impact of the Enriched Background Isotope Study 14C experimental treatments on soil respiration ? 14C values for the different soil organic matter pools. Model results suggest that a two-pool root growth model correctly represents root carbon dynamics and inputs to the soil. The model fitting process and sensitivity analysis exposed uncertainty in our estimates of the fraction of mineral soil in the slow and passive pools, dissolved organic carbon flux out of the litter layer into the mineral soil, and mixing of the humus layer into the mineral soil layer.},

  doi          = {10.1029/2009JG001193},

  url          = {https://www.osti.gov/biblio/1003737},
  journal      = {Journal of Geophysical Research},

  issn         = {0148--0227},

  number       = G4,

  volume       = 115,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 2010},

  month        = {Fri Jan 01 00:00:00 EST 2010}

}

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