Ice-melt period dominates annual carbon dioxide evasion from clear-water Arctic lakes

Current estimates of carbon dioxide (CO2) evasion from Arctic lakes are highly uncertain because few studies integrate seasonal variability, specifically evasion during spring ice-melt. We quantified annual CO2 evasion for 14 clear-water Arctic lakes in Northern Sweden through mass balance (ice-melt...

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Bibliographic Details
Published in:Limnology and Oceanography Letters
Main Authors: Karlsson, Jan, Verheijen, Hendricus, Seekell, David A., Vachon, Dominic, Klaus, Marcus
Format: Article in Journal/Newspaper
Language:English
Published: Umeå universitet, Institutionen för ekologi, miljö och geovetenskap 2024
Subjects:
Physical Geography
Naturgeografi
Environmental Sciences
Miljövetenskap
Arctic
Northern Sweden
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198781
https://doi.org/10.1002/lol2.10369
Description
Summary:Current estimates of carbon dioxide (CO2) evasion from Arctic lakes are highly uncertain because few studies integrate seasonal variability, specifically evasion during spring ice-melt. We quantified annual CO2 evasion for 14 clear-water Arctic lakes in Northern Sweden through mass balance (ice-melt period) and high-frequency loggers (open-water period). On average, 80% (SD: ± 18) of annual CO2 evasion occurred within 10 d following ice-melt. The contribution of the ice-melt period to annual CO2 evasion was high compared to earlier studies of Arctic lakes (47% ± 32%). Across all lakes, the proportion of ice-melt : annual CO2 evasion was negatively related to the dissolved organic carbon concentration and positively related to the mean depth of the lakes. The results emphasize the need for measurements of CO2 exchange at ice-melt to accurately quantify CO2 evasion from Arctic lakes. Originally included in thesis in manuscript form.

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