Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods
Abstract Freshwater systems are important sources of atmospheric methane (CH4). However, estimated emissions are associated with high uncertainties due to limited knowledge about the temporal variability in emissions and their associated controls, such as air–water gas transfer velocity. Here, we de...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-08-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.70028 |
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| author | Leonie Esters Jan Kleint Torben Gentz Anna Rutgersson Marcus B. Wallin Hiroki Iwata Antonin Verlet‐Banide Erik Sahlée |
| author_facet | Leonie Esters Jan Kleint Torben Gentz Anna Rutgersson Marcus B. Wallin Hiroki Iwata Antonin Verlet‐Banide Erik Sahlée |
| author_sort | Leonie Esters |
| collection | DOAJ |
| description | Abstract Freshwater systems are important sources of atmospheric methane (CH4). However, estimated emissions are associated with high uncertainties due to limited knowledge about the temporal variability in emissions and their associated controls, such as air–water gas transfer velocity. Here, we determined the gas transfer velocity of CH4 based on a novel measurement setup that combines simultaneous eddy covariance flux measurements with continuously monitored CH4 water‐ and air‐side concentrations. Measurements were conducted during a 10‐d campaign in a freshwater lake in mid‐Sweden. The gas transfer velocity fell within the range of existing wind‐speed‐based parameterizations derived for carbon dioxide in other lakes. For wind speeds below 4 m s−1, the gas transfer velocity for CH4 followed parameterizations predicting faster gas exchange, while for wind speeds above 5 m s−1, it aligned with those predicting relatively lower gas exchange. This pattern can be explained by ebullition. Extending the wind speed range for such combined eddy covariance measurements with continuously monitored CH4 water‐ and air‐side concentrations would improve model reliability. |
| format | Article |
| id | doaj-art-1d27da57590f4b05a30bed6478d843bb |
| institution | DOAJ |
| issn | 2378-2242 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj-art-1d27da57590f4b05a30bed6478d843bb2025-08-20T03:14:02ZengWileyLimnology and Oceanography Letters2378-22422025-08-0110456657510.1002/lol2.70028Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methodsLeonie Esters0Jan Kleint1Torben Gentz2Anna Rutgersson3Marcus B. Wallin4Hiroki Iwata5Antonin Verlet‐Banide6Erik Sahlée7Department of Earth Sciences LUVAL, Uppsala University Uppsala SwedenOrganic Geochemistry MARUM, University of Bremen Bremen GermanyMarine Geochemistry Alfred Wegener Institute Bremerhaven GermanyDepartment of Earth Sciences LUVAL, Uppsala University Uppsala SwedenDepartment of Aquatic Sciences and Assessment Swedish University of Agricultural Sciences Uppsala SwedenDepartment of Environmental Science, Faculty of Science Shinshu University Matsumoto JapanDepartment of Earth Sciences LUVAL, Uppsala University Uppsala SwedenDepartment of Earth Sciences LUVAL, Uppsala University Uppsala SwedenAbstract Freshwater systems are important sources of atmospheric methane (CH4). However, estimated emissions are associated with high uncertainties due to limited knowledge about the temporal variability in emissions and their associated controls, such as air–water gas transfer velocity. Here, we determined the gas transfer velocity of CH4 based on a novel measurement setup that combines simultaneous eddy covariance flux measurements with continuously monitored CH4 water‐ and air‐side concentrations. Measurements were conducted during a 10‐d campaign in a freshwater lake in mid‐Sweden. The gas transfer velocity fell within the range of existing wind‐speed‐based parameterizations derived for carbon dioxide in other lakes. For wind speeds below 4 m s−1, the gas transfer velocity for CH4 followed parameterizations predicting faster gas exchange, while for wind speeds above 5 m s−1, it aligned with those predicting relatively lower gas exchange. This pattern can be explained by ebullition. Extending the wind speed range for such combined eddy covariance measurements with continuously monitored CH4 water‐ and air‐side concentrations would improve model reliability.https://doi.org/10.1002/lol2.70028 |
| spellingShingle | Leonie Esters Jan Kleint Torben Gentz Anna Rutgersson Marcus B. Wallin Hiroki Iwata Antonin Verlet‐Banide Erik Sahlée Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods Limnology and Oceanography Letters |
| title | Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods |
| title_full | Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods |
| title_fullStr | Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods |
| title_full_unstemmed | Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods |
| title_short | Confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high‐frequent methods |
| title_sort | confirming existing parameterizations for methane gas transfer velocity in lakes based on direct and high frequent methods |
| url | https://doi.org/10.1002/lol2.70028 |
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