Bayesian calibration method used to elucidate carbon turnover in forest on drained organic soil

Research output: Contribution to journalArticle

Abstract

Depending on the balance between sink and source processes for C, drained organic forest soil ecosystems can be in balance or act as net sinks or sources of CO2 to the atmosphere. In order to study the effect of groundwater level and soil temperature on C-flux, the CoupModel was calibrated (climate data, groundwater levels, soil CO2 flux, net ecosystem fluxes of CO2-exchange, sensible heat flux and latent heat flux, forest production etc.) for a drained forest in Sweden. Bayesian calibration techniques were used to elucidate how different parameters and variables were interlinked in C-circulation. The calibrated model reproduced abiotic and biotic variables reasonably well except for root respiration, which was largely underestimated. Bayesian calibration reduced the uncertainties in the model and highlighted the fact that calibrations should be performed with a high number of parameters instead of specific parameter values.

Details

Authors
  • Leif Klemedtsson
  • Per-Erik Jansson
  • David Gustafsson
  • Louise Karlberg
  • Per Weslien
  • Karin von Arnold
  • Maria Ernfors
  • Ola Langvall
  • Anders Lindroth
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Geography

Keywords

  • sensible heat flux, latent heat flux, respiration, net ecosystem exchange, spruce forest, drained soils, simulations, eddy covariance, chambers, biomass
Original languageEnglish
Pages (from-to)61-79
JournalBiogeochemistry
Volume89
Issue number1
Publication statusPublished - 2008
Publication categoryResearch
Peer-reviewedYes