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Large difference in carbon emission - burial balances between boreal and arctic lakes
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. Umeå University, Sweden.
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Number of Authors: 6
2015 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, 14248Article in journal (Refereed) Published
Abstract [en]

Lakes play an important role in the global carbon (C) cycle by burying C in sediments and emitting CO2 and CH4 to the atmosphere. The strengths and control of these fundamentally different pathways are therefore of interest when assessing the continental C balance and its response to environmental change. In this study, based on new high-resolution estimates in combination with literature data, we show that annual emission: burial ratios are generally ten times higher in boreal compared to subarctic - arctic lakes. These results suggest major differences in lake C cycling between biomes, as lakes in warmer boreal regions emit more and store relatively less C than lakes in colder arctic regions. Such effects are of major importance for understanding climatic feedbacks on the continental C sink - source function at high latitudes. If predictions of global warming and northward expansion of the boreal biome are correct, it is likely that increasing C emissions from high latitude lakes will partly counteract the presumed increasing terrestrial C sink capacity at high latitudes.

Place, publisher, year, edition, pages
2015. Vol. 5, 14248
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:su:diva-121881DOI: 10.1038/srep14248ISI: 000361176900001PubMedID: 26370519OAI: diva2:862611
Available from: 2015-10-23 Created: 2015-10-19 Last updated: 2015-10-23Bibliographically approved

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Lundin, Erik J.
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