Controls on Stable Methane Isotope Values in Northern Peatlands and Potential Shifts in Values Under Permafrost Thaw Scenarios

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Fältnamn	Indikatorer	Metadata
000		07141naa a2200673 4500
001		oai:DiVA.org:uu-535866
003		SwePub
008		240814s2024 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5358662 URI
024	7	a https://doi.org/10.1029/2023JG0078372 DOI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Kuhn, McKenzie A.u Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
245	1 0	a Controls on Stable Methane Isotope Values in Northern Peatlands and Potential Shifts in Values Under Permafrost Thaw Scenarios
264	1	b American Geophysical Union (AGU),c 2024
338		a electronic2 rdacarrier
520		a Northern peatlands are a globally significant source of methane (CH4), and emissions are projected to increase due to warming and permafrost loss. Understanding the microbial mechanisms behind patterns in CH4 production in peatlands will be key to predicting annual emissions changes, with stable carbon isotopes (δ13C-CH4) being a powerful tool for characterizing these drivers. Given that δ13C-CH4 is used in top-down atmospheric inversion models to partition sources, our ability to model CH4 production pathways and associated δ13C-CH4 values is critical. We sought to characterize the role of environmental conditions, including hydrologic and vegetation patterns associated with permafrost thaw, on δ13C-CH4 values from high-latitude peatlands. We measured porewater and emitted CH4 stable isotopes, pH, and vegetation composition from five boreal-Arctic peatlands. Porewater δ13C-CH4 was strongly associated with peatland type, with δ13C enriched values obtained from more minerotrophic fens (−61.2 ± 9.1‰) compared to permafrost-free bogs (−74.1 ± 9.4‰) and raised permafrost bogs (−81.6 ± 11.5‰). Variation in porewater δ13C-CH4 was best explained by sedge cover, CH4 concentration, and the interactive effect of peatland type and pH (r2 = 0.50, p < 0.001). Emitted δ13C-CH4 varied greatly but was positively correlated with porewater δ13C-CH4. We calculated a mixed atmospheric δ13C-CH4 value for northern peatlands of −65.3 ± 7‰ and show that this value is more sensitive to landscape drying than wetting under permafrost thaw scenarios. Our results suggest northern peatland δ13C-CH4 values are likely to shift in the future which has important implications for source partitioning in atmospheric inversion models.
650	7	a NATURVETENSKAPx Geovetenskap och miljövetenskapx Miljövetenskap0 (SwePub)105022 hsv//swe
650	7	a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Environmental Sciences0 (SwePub)105022 hsv//eng
653		a greenhouse gases
653		a stable isotopes
653		a climate change
653		a wetlands
700	1	a Varner, Ruth K.u Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a McCalley, Carmody K.u Rochester Inst Technol, Gosnell Sch Life Sci, Rochester, NY USA.4 aut
700	1	a Perryman, Clarice R.u Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.;Stanford Univ, Dept Earth Syst Sci, Stanford, CA USA.4 aut
700	1	a Aurela, Mikau Finnish Meteorol Inst, Climate Syst Res, Helsinki, Finland.4 aut
700	1	a Burke, Sophia A.u Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Chanton, Jeffrey P.u Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL USA.4 aut
700	1	a Crill, Patrick M.u Stockholm Univ, Dept Geol Sci, Stockholm, Sweden.;Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden.4 aut
700	1	a DelGreco, Jessicau Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Deng, Jiau Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Heffernan, Liamu Uppsala universitet,Limnologi4 aut0 (Swepub:uu)liahe899
700	1	a Herrick, Christinau Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Hodgkins, Suzanne B.u Ohio State Univ, Dept Microbiol, Columbus, OH USA.4 aut
700	1	a Jones, Cheristy P.u Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Juutinen, Sariu Finnish Meteorol Inst, Climate Syst Res, Helsinki, Finland.4 aut
700	1	a Kane, Evan S.u Coll Forest Resources & Environm Sci, Houghton, MI USA.;US Forest Serv, USDA, Northern Res Stn, Houghton, MI USA.4 aut
700	1	a Lamit, Louis J.u Syracuse Univ, Dept Biol, Syracuse, NY USA.4 aut
700	1	a Larmola, Tuulau Nat Resources Inst Finland, Helsinki, Finland.4 aut
700	1	a Lilleskov, Eriku US Forest Serv, USDA, Northern Res Stn, Houghton, MI USA.4 aut
700	1	a Olefeldt, Davidu Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada.4 aut
700	1	a Palace, Michael W.u Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Rich, Virginia I.u Coll Forest Resources & Environm Sci, Houghton, MI USA.4 aut
700	1	a Schulze, Christopheru Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada.;Univ Montreal, Dept Geog, Montreal, PQ, Canada.4 aut
700	1	a Shorter, Joanne H.u Aerodyne Res Inc, Billerica, MA USA.4 aut
700	1	a Sullivan, Franklin B.u Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.4 aut
700	1	a Sonnentag, Oliveru Univ Montreal, Dept Geog, Montreal, PQ, Canada.4 aut
700	1	a Turetsky, Merritt R.u Univ Colorado Boulder, Dept Ecol & Evolutionary Biol, Boulder, CO USA.4 aut
700	1	a Waldrop, Mark P.u US Geol Survey, Geol Minerals Energy & Geophys Sci Ctr, Menlo Pk, CA USA.4 aut
710	2	a Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA.;Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA.b Rochester Inst Technol, Gosnell Sch Life Sci, Rochester, NY USA.4 org
773	0	t Journal of Geophysical Research - Biogeosciencesd : American Geophysical Union (AGU)g 129:7q 129:7x 2169-8953x 2169-8961
856	4	u https://doi.org/10.1029/2023JG007837y Fulltext
856	4	u https://uu.diva-portal.org/smash/get/diva2:1888957/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-535866
856	4 8	u https://doi.org/10.1029/2023JG007837

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