The MILLENNIA peat cohort model: predicting past, present and future soil carbon budgets and fluxes under changing climates in peatlands

The authors developed the MILLENNIA model to address shortcomings in global soil models, specifically the lack of long-term non-equilibrium soil organic carbon accumulation and dynamic hydrological processes. Unlike traditional C-pool models, MILLENNIA uses peat cohorts and variable water table depth to drive carbon dynamics. Validation against a UK peatland site demonstrates that the model's predictions for soil organic carbon accumulation and peat ages align well with observations.

• Current global soil models are considered unreliable for climate-soil carbon feedback predictions because they fail to accurately represent peat carbon stocks and dynamics.
• Existing C-pool models suffer from two primary deficiencies: they lack representation of long-term, non-equilibrium soil organic carbon accumulation (peat cohorts) and they fail to include dynamic hydrological processes, such as changes in water table depth, which regulate carbon turnover.
• The MILLENNIA model, which incorporates variable water table depth and peat age-cohorts, shows high sensitivity to runoff, precipitation, decomposition rates, and litter quality; its predictions for peat ages and soil organic carbon accumulation were validated using data from a UK peatland site that is currently a weak net carbon source.

APA

Stockholm Environment Institute (2011). The MILLENNIA peat cohort model: predicting past, present and future soil carbon budgets and fluxes under changing climates in peatlands. https://www.sei.org/publications/the-millennia-peat-cohort-model-predicting-past-present-and-future-soil-carbon-budgets-and-fluxes-under-changing-climates-in-peatlands/

Chicago

Stockholm Environment Institute. The MILLENNIA peat cohort model: predicting past, present and future soil carbon budgets and fluxes under changing climates in peatlands. 2011. https://www.sei.org/publications/the-millennia-peat-cohort-model-predicting-past-present-and-future-soil-carbon-budgets-and-fluxes-under-changing-climates-in-peatlands/.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=The MILLENNIA peat cohort model: predicting past, present and future soil carbon budgets and fluxes under changing climates in peatlands |date=3 January 2011 |url=https://www.sei.org/publications/the-millennia-peat-cohort-model-predicting-past-present-and-future-soil-carbon-budgets-and-fluxes-under-changing-climates-in-peatlands/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitute2011millennia, author = {{Stockholm Environment Institute}}, title = {{The MILLENNIA peat cohort model: predicting past, present and future soil carbon budgets and fluxes under changing climates in peatlands}}, institution = {Stockholm Environment Institute}, year = {2011}, month = jan, url = {https://www.sei.org/publications/the-millennia-peat-cohort-model-predicting-past-present-and-future-soil-carbon-budgets-and-fluxes-under-changing-climates-in-peatlands/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }