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Large Lakes Dominate CO2 Evasion From Lakes in an Arctic Catchment

Rocher-Ros, Gerard; Giesler, Reiner; Lundin, Erik; Salimi, Shokoufeh LU ; Jonsson, Anders and Karlsson, Jan (2017) In Geophysical Research Letters 44(24). p.12-261
Abstract

CO2 evasion from freshwater lakes is an important component of the carbon cycle. However, the relative contribution from different lake sizes may vary, since several parameters underlying CO2 flux are size dependent. Here we estimated the annual lake CO2 evasion from a catchment in northern Sweden encompassing about 30,000 differently sized lakes. We show that areal CO2 fluxes decreased rapidly with lake size, but this was counteracted by the greater overall coverage of larger lakes. As a result, total efflux increased with lake size and the single largest lake in the catchment dominated the CO2 evasion (53% of all CO2 evaded). By contrast, the contribution from the... (More)

CO2 evasion from freshwater lakes is an important component of the carbon cycle. However, the relative contribution from different lake sizes may vary, since several parameters underlying CO2 flux are size dependent. Here we estimated the annual lake CO2 evasion from a catchment in northern Sweden encompassing about 30,000 differently sized lakes. We show that areal CO2 fluxes decreased rapidly with lake size, but this was counteracted by the greater overall coverage of larger lakes. As a result, total efflux increased with lake size and the single largest lake in the catchment dominated the CO2 evasion (53% of all CO2 evaded). By contrast, the contribution from the smallest ponds (about 27,000) was minor (<6%). Our results emphasize the importance of accounting for both CO2 flux rates and areal contribution of various sized lakes in assessments of CO2 evasion at the landscape scale.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Lake CO evasion, Lake size distribution, Upscaling C cycle
in
Geophysical Research Letters
volume
44
issue
24
pages
12 - 261
publisher
American Geophysical Union
external identifiers
  • scopus:85039729313
ISSN
0094-8276
DOI
10.1002/2017GL076146
language
English
LU publication?
yes
id
3ed54a5a-6634-489b-bf05-4259c4fbefd2
date added to LUP
2018-01-09 11:11:25
date last changed
2018-02-20 14:36:50
@article{3ed54a5a-6634-489b-bf05-4259c4fbefd2,
  abstract     = {<p>CO<sub>2</sub> evasion from freshwater lakes is an important component of the carbon cycle. However, the relative contribution from different lake sizes may vary, since several parameters underlying CO<sub>2</sub> flux are size dependent. Here we estimated the annual lake CO<sub>2</sub> evasion from a catchment in northern Sweden encompassing about 30,000 differently sized lakes. We show that areal CO<sub>2</sub> fluxes decreased rapidly with lake size, but this was counteracted by the greater overall coverage of larger lakes. As a result, total efflux increased with lake size and the single largest lake in the catchment dominated the CO<sub>2</sub> evasion (53% of all CO<sub>2</sub> evaded). By contrast, the contribution from the smallest ponds (about 27,000) was minor (&lt;6%). Our results emphasize the importance of accounting for both CO<sub>2</sub> flux rates and areal contribution of various sized lakes in assessments of CO<sub>2</sub> evasion at the landscape scale.</p>},
  author       = {Rocher-Ros, Gerard and Giesler, Reiner and Lundin, Erik and Salimi, Shokoufeh and Jonsson, Anders and Karlsson, Jan},
  issn         = {0094-8276},
  keyword      = {Lake CO evasion,Lake size distribution,Upscaling C cycle},
  language     = {eng},
  month        = {12},
  number       = {24},
  pages        = {12--261},
  publisher    = {American Geophysical Union},
  series       = {Geophysical Research Letters},
  title        = {Large Lakes Dominate CO<sub>2</sub> Evasion From Lakes in an Arctic Catchment},
  url          = {http://dx.doi.org/10.1002/2017GL076146},
  volume       = {44},
  year         = {2017},
}