Andreas Persson
Senior lecturer
Integrating carbon emissions from lakes and streams in a subarctic catchment
Author
Summary, in English
Northern inland waters emit CO2 and CH4 to the atmosphere but the importance of these emissions is poorly understood due to a lack of integrated catchment-scale estimates of carbon (C) emissions from lakes and streams. In this study we quantified the annual emission of CO2 and CH4 from 27 lakes and 23 stream segments in a 15km(2) subarctic catchment in northern Sweden. All lakes and streams were net sources of C to the atmosphere on an annual basis. Streams dominated (96%) the aquatic CO2 emission while lakes (61%) dominated the aquatic CH4 emission. Total aquatic C emission from the catchment was estimated to be 9.1gCm(-2)yr(-1) (98% as CO2). Although streams only accounted for 4% of the aquatic area in the catchment, they accounted for 95% of the total emission. The C emissions from lakes and streams were considerably larger than previously reported downstream waterborne export of C from the catchment, indicating that the atmospheric losses of C in the aquatic systems are an important component in the catchment C balance.
Department/s
- Dept of Physical Geography and Ecosystem Science
Publishing year
2013
Language
English
Pages
1200-1207
Publication/Series
Journal of Geophysical Research - Biogeosciences
Volume
118
Issue
3
Document type
Journal article
Publisher
Wiley
Topic
- Physical Geography
Keywords
- subarctic
- streams
- lakes
- CO2
- CH4
- emission
Status
Published
ISBN/ISSN/Other
- ISSN: 2169-8953