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Global increase in methane production under future warming of lake bottom waters
- Source :
- Global Change Biology
- Publication Year :
- 2022
-
Abstract
- 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. Funding Agencies|Deutsche Forschungsgemeinschaft [AD 91/22-1]; European Regional Development Fund [FEDER--MCIU-AEI/CGL2017-86788-C3-2-P]; FP7 Ideas: European Research Council [336642]; H2020 European Research Council [725546]; Knut och Alice Wallenbergs Stiftelse [KAW 2018-0191]; Natural Environment Research Council
- Subjects :
- Climate Research
Climate Change
Biodiversity & Conservation
NORTHERN LAKES
Environmental Sciences & Ecology
SEDIMENT CHARACTERISTICS
aquatic
climate change
greenhouse gases
limnology
methane
temperature
tropics
Global Warming
Klimatforskning
Environmental Chemistry
CH4 EMISSIONS
General Environmental Science
Global and Planetary Change
Science & Technology
CLIMATE-CHANGE
CONSEQUENCES
Ecology
Atmosphere
Temperature
CONSUMPTION
PROFILES
EBULLITION
Miljövetenskap
Lakes
ARCTIC LAKES
TEMPERATURE-DEPENDENCE
Biodiversity Conservation
Life Sciences & Biomedicine
Methane
Environmental Sciences
Subjects
Details
- ISSN :
- 13652486
- Volume :
- 28
- Issue :
- 18
- Database :
- OpenAIRE
- Journal :
- Global change biology
- Accession number :
- edsair.doi.dedup.....c79936118e072acc4c00d91fa4a988e2