Global increase in methane production under future warming of lake bottom waters
Research output: Contribution to journal › Article › peer-review
Standard Standard
In: Global Change Biology, Vol. 28, No. 18, 09.2022, p. 5427-5440.
Research output: Contribution to journal › Article › peer-review
HarvardHarvard
APA
CBE
MLA
VancouverVancouver
Author
RIS
TY - JOUR
T1 - Global increase in methane production under future warming of lake bottom waters
AU - Jansen, Joachim
AU - Woolway, Richard Iestyn
AU - Kraemer, Benjamin M.
AU - Albergel, Clement
AU - Bastviken, David
AU - Weyhenmeyer, Gesa A.
AU - Marce, Rafael
AU - Sharma, Sapna
AU - Sobek, Sebastian
AU - Tranvik, Lars J.
AU - Perroud, Marjorie
AU - Golub, Malgorzata
AU - Moore, Tadhg N.
AU - Vinna, Love Raman
AU - La Fuente, Sofia
AU - Grant, Luke
AU - Pierson, Don C.
AU - Thiery, Wim
AU - Jennings, Eleanor
N1 - © 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
PY - 2022/9
Y1 - 2022/9
N2 - 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°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.
AB - 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°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.
KW - aquatic
KW - climate change
KW - greenhouse gases
KW - limnology
KW - methane
KW - temperature
KW - tropics
U2 - 10.1111/gcb.16298
DO - 10.1111/gcb.16298
M3 - Article
C2 - 35694903
VL - 28
SP - 5427
EP - 5440
JO - Global Change Biology
JF - Global Change Biology
SN - 1354-1013
IS - 18
ER -