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Comparison of floating chamber and eddy covariance measurements of lake greenhouse gas fluxes

Podgrajsek, E.; Sahlee, E.; Bastviken, D.; Holst, Jutta LU ; Lindroth, Anders LU ; Tranvik, L. and Rutgersson, A. (2014) In Biogeosciences 11(15). p.4225-4233
Abstract
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 Tamnaren 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 (pCO(2w)) in the EC flux footprint. The methods agree better for CH4 fluxes. It is, however,... (More)
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 Tamnaren 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 (pCO(2w)) 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biogeosciences
volume
11
issue
15
pages
4225 - 4233
publisher
Copernicus Publications
external identifiers
  • wos:000341104400012
  • scopus:84905990175
ISSN
1726-4189
DOI
10.5194/bg-11-4225-2014
project
BECC
language
English
LU publication?
yes
id
516a38e8-33a6-4d6d-bea7-23f0fe325ae8 (old id 4728872)
date added to LUP
2014-10-27 13:06:01
date last changed
2017-07-02 03:10:58
@article{516a38e8-33a6-4d6d-bea7-23f0fe325ae8,
  abstract     = {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 Tamnaren 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 (pCO(2w)) 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.},
  author       = {Podgrajsek, E. and Sahlee, E. and Bastviken, D. and Holst, Jutta and Lindroth, Anders and Tranvik, L. and Rutgersson, A.},
  issn         = {1726-4189},
  language     = {eng},
  number       = {15},
  pages        = {4225--4233},
  publisher    = {Copernicus Publications},
  series       = {Biogeosciences},
  title        = {Comparison of floating chamber and eddy covariance measurements of lake greenhouse gas fluxes},
  url          = {http://dx.doi.org/10.5194/bg-11-4225-2014},
  volume       = {11},
  year         = {2014},
}