A weak C sink at high latitudes: support from an integrated terrestrial – aquatic C balance
(English)Manuscript (preprint) (Other academic)
High latitude ecosystems have served as net sinks of atmospheric carbon (C) in the Holocene time perspective. However, the ongoing climate warming makes it questionable if high latitude landscapes still function as net C sinks. In this study we used multiyear high resolution C flux data to estimate an integrated terrestrial-aquatic C balance of a sub-arctic catchment. The results indicate large inter annual variability in C fluxes and suggest that the C sink function of this landscape is weak, especially when also accounting for the often neglected C losses from aquatic systems. In fact, our results suggest that it is more likely that the studied catchment serves as a net source of C rather than a net sink. These results highlight the importance of inland waters in the C cycle and that the strength of the C sequestering in the contemporary sub-arctic environment is much weaker than often assumed.
Earth and Related Environmental Sciences
Research subject Earth Sciences with Specialization Environmental Analysis
IdentifiersURN: urn:nbn:se:umu:diva-84536OAI: oai:DiVA.org:umu-84536DiVA: diva2:684962
FunderSwedish Research Council, 621-385 2008-4390