Detecting the signature of permafrost thaw in Arctic rivers

Detecting the signature of permafrost thaw in Arctic rivers

Climate change induced permafrost thaw in the Arctic is mobilizing ancient dissolved organic carbon (DOC) into headwater streams; however, DOC exported from the mouth of major arctic rivers appears predominantly modern. Here we highlight that ancient (>20,000 years B.P.) permafrost DOC is rapidly...

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Veröffentlicht in:Geophysical research letters 2015-04, Vol.42 (8), p.2830-2835
Hauptverfasser: Spencer, Robert G. M., Mann, Paul J., Dittmar, Thorsten, Eglinton, Timothy I., McIntyre, Cameron, Holmes, R. Max, Zimov, Nikita, Stubbins, Aron
Format: Artikel
Sprache:eng
Schlagworte:
Aliphatic compounds
Arctic
Climate
Climate change
Decay
Degradation
Dissolved organic carbon
Exports
Headwaters
International trade
Microorganisms
organic carbon
organic matter
Permafrost
river
Rivers
Signatures
Streams
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Zusammenfassung:Climate change induced permafrost thaw in the Arctic is mobilizing ancient dissolved organic carbon (DOC) into headwater streams; however, DOC exported from the mouth of major arctic rivers appears predominantly modern. Here we highlight that ancient (>20,000 years B.P.) permafrost DOC is rapidly utilized by microbes (~50% DOC loss in
ISSN:0094-8276
1944-8007
DOI:10.1002/2015GL063498