High emission of carbon dioxide and methane during ice thaw in high latitude lakes. Karlsson, J., Giesler, R., Persson, J., & Lundin, E. Geophysical Research Letters, 40(6):1123–1127, March, 2013. 00040![High emission of carbon dioxide and methane during ice thaw in high latitude lakes [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The winter period is seldom included in the estimates of aquatic-atmospheric carbon exchange. In this study we quantified the flux of carbon dioxide (CO2) and methane (CH4) over 3 years from 12 small subarctic lakes. The lakes accumulated consistent and high amounts of CO2 and CH4 (56–97% as CO2) over the winter, resulting in a high flux during ice thaw. The CO2 flux during ice thaw increased with increasing mean depth of the lakes, while the CH4 flux was high in lakes surrounded by mires. The ice thaw period was quantitatively important to the annual gas balances of the lakes. For nine of the lakes, 11 to 55% of the annual flux occurred during thaw. For three of the lakes with an apparent net annual CO2 uptake, including the thaw period reversed the balance from sink to source. Our results suggest that the ice thaw period is critically important for the emissions of CO2 and CH4 in small lakes.
@article{karlsson_high_2013,
title = {High emission of carbon dioxide and methane during ice thaw in high latitude lakes},
volume = {40},
issn = {1944-8007},
url = {http://onlinelibrary.wiley.com/doi/10.1002/grl.50152/abstract},
doi = {10.1002/grl.50152},
abstract = {The winter period is seldom included in the estimates of aquatic-atmospheric carbon exchange. In this study we quantified the flux of carbon dioxide (CO2) and methane (CH4) over 3 years from 12 small subarctic lakes. The lakes accumulated consistent and high amounts of CO2 and CH4 (56–97\% as CO2) over the winter, resulting in a high flux during ice thaw. The CO2 flux during ice thaw increased with increasing mean depth of the lakes, while the CH4 flux was high in lakes surrounded by mires. The ice thaw period was quantitatively important to the annual gas balances of the lakes. For nine of the lakes, 11 to 55\% of the annual flux occurred during thaw. For three of the lakes with an apparent net annual CO2 uptake, including the thaw period reversed the balance from sink to source. Our results suggest that the ice thaw period is critically important for the emissions of CO2 and CH4 in small lakes.},
language = {en},
number = {6},
urldate = {2017-02-06},
journal = {Geophysical Research Letters},
author = {Karlsson, Jan and Giesler, Reiner and Persson, Jenny and Lundin, Erik},
month = mar,
year = {2013},
note = {00040},
keywords = {\#nosource, 0414 Biogeochemical cycles, processes, and modeling, 0428 Carbon cycling, 0458 Limnology, 0475 Permafrost, cryosphere, and high-latitude processes, 0490 Trace gases, Biogeochemical cycles, processes, and modeling, Limnology, Permafrost, cryosphere, and high-latitude processes, Trace gases, carbon cycling, carbon fluxes, lakes, winter},
pages = {1123--1127},
}
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The ice thaw period was quantitatively important to the annual gas balances of the lakes. For nine of the lakes, 11 to 55% of the annual flux occurred during thaw. For three of the lakes with an apparent net annual CO2 uptake, including the thaw period reversed the balance from sink to source. 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In this study we quantified the flux of carbon dioxide (CO2) and methane (CH4) over 3 years from 12 small subarctic lakes. The lakes accumulated consistent and high amounts of CO2 and CH4 (56–97\\% as CO2) over the winter, resulting in a high flux during ice thaw. The CO2 flux during ice thaw increased with increasing mean depth of the lakes, while the CH4 flux was high in lakes surrounded by mires. The ice thaw period was quantitatively important to the annual gas balances of the lakes. For nine of the lakes, 11 to 55\\% of the annual flux occurred during thaw. For three of the lakes with an apparent net annual CO2 uptake, including the thaw period reversed the balance from sink to source. 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