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| Titel |
Comparison of floating chamber and eddy covariance measurements of lake greenhouse gas fluxes |
| VerfasserIn |
E. Podgrajsek, E. Sahlee, D. Bastviken, J. Holst, A. Lindroth, L. Tranvik, A. Rutgersson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 15 ; Nr. 11, no. 15 (2014-08-12), S.4225-4233 |
| Datensatznummer |
250117544
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| Publikation (Nr.) |
 copernicus.org/bg-11-4225-2014.pdf |
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| Zusammenfassung |
| Fluxes of carbon dioxide (CO2) and methane (CH4) from lakes may
have a large impact on the magnitude of the terrestrial carbon sink.
Traditionally lake fluxes have been measured using the floating chamber (FC)
technique; however, several recent studies use the eddy covariance (EC)
method. We present simultaneous flux measurements using both methods at
lake Tämnaren in Sweden during field campaigns in 2011 and 2012. Only
very few similar studies exist. For CO2 flux, the two methods agree
relatively well during some periods, but deviate substantially at other
times. The large discrepancies might be caused by heterogeneity of partial
pressure of CO2 (pCO2w) in the EC flux footprint. The
methods agree better for CH4 fluxes. It is, however, clear that
short-term discontinuous FC measurements are likely to miss important high
flux events. |
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