Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes
Methane (CH4) seepage (i.e., steady or episodic flow of gaseous hydrocarbons from subsurface reservoirs) has been identified as a significant source of atmospheric CH4. However, radiocarbon data from polar ice cores have recently brought into question the magnitude of fossil CH4 seepage naturally oc...
Published in: | Hydrology and Earth System Sciences |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00054982 2024-09-15T18:11:40+00:00 Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes Thalasso, Frederic Walter Anthony, Katey Irzak, Olya Chaleff, Ethan Barker, Laughlin Anthony, Peter Hanke, Philip Gonzalez-Valencia, Rodrigo 2020-12 electronic https://doi.org/10.5194/hess-24-6047-2020 https://noa.gwlb.de/receive/cop_mods_00054982 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054633/hess-24-6047-2020.pdf https://hess.copernicus.org/articles/24/6047/2020/hess-24-6047-2020.pdf eng eng Copernicus Publications Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-24-6047-2020 https://noa.gwlb.de/receive/cop_mods_00054982 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054633/hess-24-6047-2020.pdf https://hess.copernicus.org/articles/24/6047/2020/hess-24-6047-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/hess-24-6047-2020 2024-06-26T04:43:09Z Methane (CH4) seepage (i.e., steady or episodic flow of gaseous hydrocarbons from subsurface reservoirs) has been identified as a significant source of atmospheric CH4. However, radiocarbon data from polar ice cores have recently brought into question the magnitude of fossil CH4 seepage naturally occurring. In northern high latitudes, seepage of subsurface CH4 is impeded by permafrost and glaciers, which are under an increasing risk of thawing and melting in a globally warming world, implying the potential release of large stores of CH4 in the future. Resolution of these important questions requires a better constraint and monitoring of actual emissions from seepage areas. The measurement of these seeps is challenging, particularly in aquatic environments, because they involve large and irregular gas flow rates, unevenly distributed both spatially and temporally. Large macroseeps are particularly difficult to measure due to a lack of lightweight, inexpensive methods that can be deployed in remote Arctic environments. Here, we report the use of a mobile chamber for measuring emissions at the surface of ice-free lakes subject to intense CH4 macroseepage. Tested in a remote Alaskan lake, the method was validated for the measurement of fossil CH4 emissions of up to 1.08 × 104 g CH4 m−2 d−1 (13.0 L m−2 min−1 of 83.4 % CH4 bubbles), which is within the range of global fossil methane seepage and several orders of magnitude above standard ecological emissions from lakes. In addition, this method allows for low diffusive flux measurements. Thus, the mobile chamber approach presented here covers the entire magnitude range of CH4 emissions currently identified, from those standardly observed in lakes to intense macroseeps, with a single apparatus of moderate cost. Article in Journal/Newspaper Ice permafrost Niedersächsisches Online-Archiv NOA Hydrology and Earth System Sciences 24 12 6047 6058 |
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article Verlagsveröffentlichung Thalasso, Frederic Walter Anthony, Katey Irzak, Olya Chaleff, Ethan Barker, Laughlin Anthony, Peter Hanke, Philip Gonzalez-Valencia, Rodrigo Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes |
topic_facet |
article Verlagsveröffentlichung |
description |
Methane (CH4) seepage (i.e., steady or episodic flow of gaseous hydrocarbons from subsurface reservoirs) has been identified as a significant source of atmospheric CH4. However, radiocarbon data from polar ice cores have recently brought into question the magnitude of fossil CH4 seepage naturally occurring. In northern high latitudes, seepage of subsurface CH4 is impeded by permafrost and glaciers, which are under an increasing risk of thawing and melting in a globally warming world, implying the potential release of large stores of CH4 in the future. Resolution of these important questions requires a better constraint and monitoring of actual emissions from seepage areas. The measurement of these seeps is challenging, particularly in aquatic environments, because they involve large and irregular gas flow rates, unevenly distributed both spatially and temporally. Large macroseeps are particularly difficult to measure due to a lack of lightweight, inexpensive methods that can be deployed in remote Arctic environments. Here, we report the use of a mobile chamber for measuring emissions at the surface of ice-free lakes subject to intense CH4 macroseepage. Tested in a remote Alaskan lake, the method was validated for the measurement of fossil CH4 emissions of up to 1.08 × 104 g CH4 m−2 d−1 (13.0 L m−2 min−1 of 83.4 % CH4 bubbles), which is within the range of global fossil methane seepage and several orders of magnitude above standard ecological emissions from lakes. In addition, this method allows for low diffusive flux measurements. Thus, the mobile chamber approach presented here covers the entire magnitude range of CH4 emissions currently identified, from those standardly observed in lakes to intense macroseeps, with a single apparatus of moderate cost. |
format |
Article in Journal/Newspaper |
author |
Thalasso, Frederic Walter Anthony, Katey Irzak, Olya Chaleff, Ethan Barker, Laughlin Anthony, Peter Hanke, Philip Gonzalez-Valencia, Rodrigo |
author_facet |
Thalasso, Frederic Walter Anthony, Katey Irzak, Olya Chaleff, Ethan Barker, Laughlin Anthony, Peter Hanke, Philip Gonzalez-Valencia, Rodrigo |
author_sort |
Thalasso, Frederic |
title |
Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes |
title_short |
Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes |
title_full |
Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes |
title_fullStr |
Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes |
title_full_unstemmed |
Technical note: Mobile open dynamic chamber measurement of methane macroseeps in lakes |
title_sort |
technical note: mobile open dynamic chamber measurement of methane macroseeps in lakes |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/hess-24-6047-2020 https://noa.gwlb.de/receive/cop_mods_00054982 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054633/hess-24-6047-2020.pdf https://hess.copernicus.org/articles/24/6047/2020/hess-24-6047-2020.pdf |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-24-6047-2020 https://noa.gwlb.de/receive/cop_mods_00054982 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054633/hess-24-6047-2020.pdf https://hess.copernicus.org/articles/24/6047/2020/hess-24-6047-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/hess-24-6047-2020 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
24 |
container_issue |
12 |
container_start_page |
6047 |
op_container_end_page |
6058 |
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1810449256134213632 |