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Impact of hydrological variations on modeling of peatland CO 2 fluxes: Results from the North American Carbon Program site synthesis

hal.structure.identifierDepartment of Atmospheric and Oceanic Sciences [Madison]
dc.contributor.authorSULMAN, Benjamin
hal.structure.identifierDepartment of Atmospheric and Oceanic Sciences [Madison]
dc.contributor.authorDESAI, Ankur
hal.structure.identifierDepartment of Atmospheric and Oceanic Sciences [Madison]
dc.contributor.authorSCHROEDER, Nicole
hal.structure.identifierOak Ridge National Laboratory [Oak Ridge] [ORNL]
dc.contributor.authorRICCIUTO, Dan
dc.contributor.authorBARR, Alan
dc.contributor.authorRICHARDSON, Andrew
hal.structure.identifierDepartment of Biological Sciences
dc.contributor.authorFLANAGAN, Lawrence
hal.structure.identifierDepartment of Geography
dc.contributor.authorLAFLEUR, Peter
hal.structure.identifierShandong Agricultural University [SDAU]
dc.contributor.authorTIAN, Hanqin
hal.structure.identifierNortheast Forestry University [NEFU]
dc.contributor.authorCHEN, Guangsheng
hal.structure.identifierUniversity of Alberta
dc.contributor.authorGRANT, Robert
hal.structure.identifierMontana State University [MSU]
dc.contributor.authorPOULTER, Benjamin
hal.structure.identifierComputational & Applied Vegetation Ecology [CAVElab]
dc.contributor.authorVERBEECK, Hans
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierICOS-ATC [ICOS-ATC]
dc.contributor.authorCIAIS, Philippe
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorRINGEVAL, Bruno
hal.structure.identifierDepartment of Atmospheric Science [Fort Collins]
dc.contributor.authorBAKER, Ian
hal.structure.identifierUniversity of Colorado [Boulder]
dc.contributor.authorSCHAEFER, Kevin
hal.structure.identifierDepartment of Microbiology and Plant Biology
dc.contributor.authorLUO, Yiqi
hal.structure.identifierDepartment of Ecology and Evolutionary Biology
dc.contributor.authorWENG, Ensheng
dc.date.accessioned2024-04-08T12:08:48Z
dc.date.available2024-04-08T12:08:48Z
dc.date.issued2012
dc.identifier.issn2169-8953
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196540
dc.description.abstractEnNorthern peatlands are likely to be important in future carbon cycle-climate feedbacks due to their large carbon pools and vulnerability to hydrological change. Use of non-peatland-specific models could lead to bias in modeling studies of peatland-rich regions. Here, seven ecosystem models were used to simulate CO 2 fluxes at three wetland sites in Canada and the northern United States, including two nutrient-rich fens and one nutrient-poor, sphagnum-dominated bog, over periods between 1999 and 2007. Models consistently overestimated mean annual gross ecosystem production (GEP) and ecosystem respiration (ER) at all three sites. Monthly flux residuals (simulated – observed) were correlated with measured water table for GEP and ER at the two fen sites, but were not consistently correlated with water table at the bog site. Models that inhibited soil respiration under saturated conditions had less mean bias than models that did not. Modeled diurnal cycles agreed well with eddy covariance measurements at fen sites, but overestimated fluxes at the bog site. Eddy covariance GEP and ER at fens were higher during dry periods than during wet periods, while models predicted either the opposite relationship or no significant difference. At the bog site, eddy covariance GEP did not depend on water table, while simulated GEP was higher during wet periods. Carbon cycle modeling in peatland-rich regions could be improved by incorporating wetland-specific hydrology and by inhibiting GEP and ER under saturated conditions. Bogs and fens likely require distinct plant and soil parameterizations in ecosystem models due to differences in nutrients, peat properties, and plant communities.
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.title.enImpact of hydrological variations on modeling of peatland CO 2 fluxes: Results from the North American Carbon Program site synthesis
dc.typeArticle de revue
dc.identifier.doi10.1029/2011JG001862
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphère
bordeaux.journalJournal of Geophysical Research: Biogeosciences
bordeaux.pageG01031
bordeaux.volume117
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issueG1
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01806761
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01806761v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Geophysical%20Research:%20Biogeosciences&rft.date=2012&rft.volume=117&rft.issue=G1&rft.spage=G01031&rft.epage=G01031&rft.eissn=2169-8953&rft.issn=2169-8953&rft.au=SULMAN,%20Benjamin&DESAI,%20Ankur&SCHROEDER,%20Nicole&RICCIUTO,%20Dan&BARR,%20Alan&rft.genre=article


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