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Assessing methane emissions for northern peatlands in ORCHIDEE-PEAT revision 7020

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dc.abstract.enIn the global methane budget, the largest natural source is attributed to wetlands, which encompass all ecosystems composed of waterlogged or inundated ground, capable of methane production. Among them, northern peatlands that store large amounts of soil organic carbon have been functioning, since the end of the last glaciation period, as long-term sources of methane (CH4) and are one of the most significant methane sources among wetlands. To reduce uncertainty of quantifying methane flux in the global methane budget, it is of significance to understand the underlying processes for methane production and fluxes in northern peatlands. A methane model that features methane production and transport by plants, ebullition process and diffusion in soil, oxidation to CO2, and CH4 fluxes to the atmosphere has been embedded in the ORCHIDEE-PEAT land surface model that includes an explicit representation of northern peatlands. ORCHIDEE-PCH4 was calibrated and evaluated on 14 peatland sites distributed on both the Eurasian and American continents in the northern boreal and temperate regions. Data assimilation approaches were employed to optimized parameters at each site and at all sites simultaneously. Results show that methanogenesis is sensitive to temperature and substrate availability over the top 75 cm of soil depth. Methane emissions estimated using single site optimization (SSO) of model parameters are underestimated by 9 g CH4 m−2 yr−1 on average (i.e., 50 % higher than the site average of yearly methane emissions). While using the multi-site optimization (MSO), methane emissions are overestimated by 5 g CH4 m−2 yr−1 on average across all investigated sites (i.e., 37 % lower than the site average of yearly methane emissions).
dc.affiliationWydział Inżynierii Środowiska i Inżynierii Mechanicznej
dc.affiliation.instituteKatedra Bioklimatologii
dc.affiliation.instituteKatedra Budownictwa i Geoinżynierii
dc.contributor.authorSalmon, Elodie
dc.contributor.authorJégou, Fabrice
dc.contributor.authorGuenet, Bertrand
dc.contributor.authorJourdain, Line
dc.contributor.authorQiu, Chunjing
dc.contributor.authorBastrikov, Vladislav
dc.contributor.authorGuimbaud, Christophe
dc.contributor.authorZhu, Dan
dc.contributor.authorCiais, Philippe
dc.contributor.authorPeylin, Philippe
dc.contributor.authorGogo, Sébastien
dc.contributor.authorLaggoun-Défarge, Fatima
dc.contributor.authorAurela, Mika
dc.contributor.authorBret-Harte, M. Syndonia
dc.contributor.authorChen, Jiquan
dc.contributor.authorChojnicki, Bogdan
dc.contributor.authorChu, Housen
dc.contributor.authorEdgar, Colin W.
dc.contributor.authorEuskirchen, Eugenie S.
dc.contributor.authorFlanagan, Lawrence B.
dc.contributor.authorFortuniak, Krzysztof
dc.contributor.authorHoll, David
dc.contributor.authorKlatt, Janina
dc.contributor.authorKolle, Olaf
dc.contributor.authorKowalska, Natalia
dc.contributor.authorKutzbach, Lars
dc.contributor.authorLohila, Annalea
dc.contributor.authorMerbold, Lutz
dc.contributor.authorPawlak, Włodzimierz
dc.contributor.authorSachs, Torsten
dc.contributor.authorZiemblińska, Klaudia
dc.date.access2026-01-09
dc.date.accessioned2026-01-09T13:12:09Z
dc.date.available2026-01-09T13:12:09Z
dc.date.copyright2022-04-06
dc.date.issued2022
dc.description.abstract<jats:p>Abstract. In the global methane budget, the largest natural source is attributed to wetlands, which encompass all ecosystems composed of waterlogged or inundated ground, capable of methane production. Among them, northern peatlands that store large amounts of soil organic carbon have been functioning, since the end of the last glaciation period, as long-term sources of methane (CH4) and are one of the most significant methane sources among wetlands. To reduce uncertainty of quantifying methane flux in the global methane budget, it is of significance to understand the underlying processes for methane production and fluxes in northern peatlands. A methane model that features methane production and transport by plants, ebullition process and diffusion in soil, oxidation to CO2, and CH4 fluxes to the atmosphere has been embedded in the ORCHIDEE-PEAT land surface model that includes an explicit representation of northern peatlands. ORCHIDEE-PCH4 was calibrated and evaluated on 14 peatland sites distributed on both the Eurasian and American continents in the northern boreal and temperate regions. Data assimilation approaches were employed to optimized parameters at each site and at all sites simultaneously. Results show that methanogenesis is sensitive to temperature and substrate availability over the top 75 cm of soil depth. Methane emissions estimated using single site optimization (SSO) of model parameters are underestimated by 9 g CH4 m−2 yr−1 on average (i.e., 50 % higher than the site average of yearly methane emissions). While using the multi-site optimization (MSO), methane emissions are overestimated by 5 g CH4 m−2 yr−1 on average across all investigated sites (i.e., 37 % lower than the site average of yearly methane emissions).</jats:p>
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if5,1
dc.description.number7
dc.description.points140
dc.description.versionfinal_published
dc.description.volume15
dc.identifier.doi10.5194/gmd-15-2813-2022
dc.identifier.eissn1991-9603
dc.identifier.issn1991-959X
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/6686
dc.identifier.weblinkhttps://gmd.copernicus.org/articles/15/2813/2022/
dc.languageen
dc.relation.ispartofGeoscientific Model Development
dc.relation.pages2813-2838
dc.rightsCC-BY
dc.sciencecloudsend
dc.share.typeOPEN_JOURNAL
dc.titleAssessing methane emissions for northern peatlands in ORCHIDEE-PEAT revision 7020
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.issue7
oaire.citation.volume15