Articles | Volume 11, issue 23
https://doi.org/10.5194/bg-11-6791-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-11-6791-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Modeling the impediment of methane ebullition bubbles by seasonal lake ice
S. Greene
Department of Chemistry, the University of Chicago, Chicago, Illinois, USA
K. M. Walter Anthony
CORRESPONDING AUTHOR
Water and Environmental Research Center, Institute of Northern Engineering,University of Alaska Fairbanks, Fairbanks, Alaska, USA
D. Archer
Department of the Geophysical Sciences, the University of Chicago, Chicago, Illinois, USA
A. Sepulveda-Jauregui
Water and Environmental Research Center, Institute of Northern Engineering,University of Alaska Fairbanks, Fairbanks, Alaska, USA
K. Martinez-Cruz
Biotechnology and Bioengineering Department, Cinvestav, Mexico City, D. F., Mexico
Water and Environmental Research Center, Institute of Northern Engineering,University of Alaska Fairbanks, Fairbanks, Alaska, USA
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This dataset includes monthly measurements of carbon dioxide and methane exchange between land, water, and the atmosphere from over 1000 sites in Arctic and boreal regions. It combines measurements from a variety of ecosystems, including wetlands, forests, tundra, lakes, and rivers, gathered by over 260 researchers from 1984–2024. This dataset can be used to improve and reduce uncertainty in carbon budgets in order to strengthen our understanding of climate feedbacks in a warming world.
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We created a database of 19,540 thawing permafrost sites across Alaska, including both abrupt and non-abrupt thaw features and explored relationships with elevation, slope, and incoming solar radiation. We use the database to show that existing ground ice maps are too coarse to predict abrupt thaw risk. This database can enhance predictions of future thaw and guide planning and adaptation strategies.
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Short summary
Methane (CH4) bubbles emitted from the anoxic sediments of northern lakes constitute a significant methane flux to the atmosphere, but entrapment by seasonal lake ice impedes bubble release to the atmosphere. Using numerical modeling and field measurement of a lake in Alaska, we found that 80% of CH4 in ice-trapped bubbles dissolves into the water column. Microbes consume half of that CH4. Emission by bubbling is greatest in summer but continues in winter through some open holes in lake ice.
Methane (CH4) bubbles emitted from the anoxic sediments of northern lakes constitute a...
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