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Global increase in methane production under future warming of lake bottom waters
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.ORCID iD: 0000-0001-5965-7662
Bangor Univ, Sch Ocean Sci, Anglesey, Wales..
IGB Leibniz Inst Freshwater Ecol & Inland Fisheri, Ecosyst Res Dept, Berlin, Germany..ORCID iD: 0000-0002-3390-9005
ECSAT, European Space Agcy Climate Off, Harwell Campus, Didcot, Oxon, England..ORCID iD: 0000-0003-1095-2702
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2022 (English)In: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 28, no 18, p. 5427-5440Article in journal (Refereed) Published
Abstract [en]

Lakes are significant emitters of methane to the atmosphere, and thus are important components of the global methane budget. Methane is typically produced in lake sediments, with the rate of methane production being strongly temperature dependent. Local and regional studies highlight the risk of increasing methane production under future climate change, but a global estimate is not currently available. Here, we project changes in global lake bottom temperatures and sediment methane production rates from 1901 to 2099. By the end of the 21st century, lake bottom temperatures are projected to increase globally, by an average of 0.86-2.60 degrees C under Representative Concentration Pathways (RCPs) 2.6-8.5, with greater warming projected at lower latitudes. This future warming of bottom waters will likely result in an increase in methane production rates of 13%-40% by the end of the century, with many low-latitude lakes experiencing an increase of up to 17 times the historical (1970-1999) global average under RCP 8.5. The projected increase in methane production will likely lead to higher emissions from lakes, although the exact magnitude of the emission increase requires more detailed regional studies.

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 28, no 18, p. 5427-5440
Keywords [en]
aquatic, climate change, greenhouse gases, limnology, methane, temperature, tropics
National Category
Environmental Sciences Climate Research
Identifiers
URN: urn:nbn:se:uu:diva-485430DOI: 10.1111/gcb.16298ISI: 000815351300001PubMedID: 35694903OAI: oai:DiVA.org:uu-485430DiVA, id: diva2:1699374
Funder
EU, FP7, Seventh Framework Programme, 336642EU, Horizon 2020, 725546Knut and Alice Wallenberg Foundation, KAW 2018-0191Swedish Research Council, 2020-06460Swedish Research Council, 2018-04524Swedish Research Council, 2016-04829Swedish Research Council, 2020-03222Swedish Research Council, 2017-04405Swedish Research Council Formas, 2018-01794Swedish Research Council Formas, 2020-01091German Research Foundation (DFG), AD 91/22-1Available from: 2022-09-27 Created: 2022-09-27 Last updated: 2022-09-27Bibliographically approved

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Jansen, JoachimWeyhenmeyer, Gesa A.Sobek, SebastianTranvik, Lars J.Pierson, Don C.

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Jansen, JoachimKraemer, Benjamin M.Albergel, ClementBastviken, DavidWeyhenmeyer, Gesa A.Marce, RafaelSharma, SapnaSobek, SebastianTranvik, Lars J.Golub, MalgorzataPierson, Don C.Thiery, Wim
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