Highest methane concentrations in an Arctic river linked to local terrestrial inputs
Large amounts of methane ( CH 4 ) could be released as a result of the gradual or abrupt thawing of Arctic permafrost due to global warming. Once available, this potent greenhouse gas is emitted into the atmosphere or transported laterally into aquatic ecosystems via hydrologic connectivity at the s...
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Copernicus Publications
2022
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ftdoajarticles:oai:doaj.org/article:000c1ab89ca34629b8fd9d40c6167ae0 2023-05-15T14:55:42+02:00 Highest methane concentrations in an Arctic river linked to local terrestrial inputs K. Castro-Morales A. Canning S. Arzberger W. A. Overholt K. Küsel O. Kolle M. Göckede N. Zimov A. Körtzinger 2022-11-01T00:00:00Z https://doi.org/10.5194/bg-19-5059-2022 https://doaj.org/article/000c1ab89ca34629b8fd9d40c6167ae0 EN eng Copernicus Publications https://bg.copernicus.org/articles/19/5059/2022/bg-19-5059-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-5059-2022 1726-4170 1726-4189 https://doaj.org/article/000c1ab89ca34629b8fd9d40c6167ae0 Biogeosciences, Vol 19, Pp 5059-5077 (2022) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/bg-19-5059-2022 2022-12-30T23:04:43Z Large amounts of methane ( CH 4 ) could be released as a result of the gradual or abrupt thawing of Arctic permafrost due to global warming. Once available, this potent greenhouse gas is emitted into the atmosphere or transported laterally into aquatic ecosystems via hydrologic connectivity at the surface or via groundwaters. While high northern latitudes contribute up to 5 % of total global CH 4 emissions, the specific contribution of Arctic rivers and streams is largely unknown. We analyzed high-resolution continuous CH 4 concentrations measured between 15 and 17 June 2019 (late freshet) in a ∼120 km transect of the Kolyma River in northeast Siberia. The average partial pressure of CH 4 ( p CH 4 ) in tributaries (66.8–206.8 µatm ) was 2–7 times higher than in the main river channel (28.3 µatm ). In the main channel, CH 4 was up to 1600 % supersaturated with respect to atmospheric equilibrium. Key sites along the riverbank and at tributary confluences accounted for 10 % of the navigated transect and had the highest p CH 4 (41 ± 7 µatm ) and CH 4 emissions (0.03 ± 0.004 <math xmlns="http://www.w3.org/1998/Math/MathML" id="M15" display="inline" overflow="scroll" dspmath="mathml"><mrow class="unit"><mi mathvariant="normal">mmol</mi><mspace linebreak="nobreak" width="0.125em"/><msup><mi mathvariant="normal">m</mi><mrow><mo>-</mo><mn mathvariant="normal">2</mn></mrow></msup><mspace width="0.125em" linebreak="nobreak"/><msup><mi mathvariant="normal">d</mi><mrow><mo>-</mo><mn mathvariant="normal">1</mn></mrow></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="67pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="d4c2ee668fea12b7ca233e9f97025a6f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="bg-19-5059-2022-ie00001.svg" width="67pt" height="13pt" ... Article in Journal/Newspaper Arctic Global warming kolyma river permafrost Siberia Directory of Open Access Journals: DOAJ Articles Arctic Kolyma ENVELOPE(161.000,161.000,69.500,69.500) Biogeosciences 19 21 5059 5077 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 K. Castro-Morales A. Canning S. Arzberger W. A. Overholt K. Küsel O. Kolle M. Göckede N. Zimov A. Körtzinger Highest methane concentrations in an Arctic river linked to local terrestrial inputs |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Large amounts of methane ( CH 4 ) could be released as a result of the gradual or abrupt thawing of Arctic permafrost due to global warming. Once available, this potent greenhouse gas is emitted into the atmosphere or transported laterally into aquatic ecosystems via hydrologic connectivity at the surface or via groundwaters. While high northern latitudes contribute up to 5 % of total global CH 4 emissions, the specific contribution of Arctic rivers and streams is largely unknown. We analyzed high-resolution continuous CH 4 concentrations measured between 15 and 17 June 2019 (late freshet) in a ∼120 km transect of the Kolyma River in northeast Siberia. The average partial pressure of CH 4 ( p CH 4 ) in tributaries (66.8–206.8 µatm ) was 2–7 times higher than in the main river channel (28.3 µatm ). In the main channel, CH 4 was up to 1600 % supersaturated with respect to atmospheric equilibrium. Key sites along the riverbank and at tributary confluences accounted for 10 % of the navigated transect and had the highest p CH 4 (41 ± 7 µatm ) and CH 4 emissions (0.03 ± 0.004 <math xmlns="http://www.w3.org/1998/Math/MathML" id="M15" display="inline" overflow="scroll" dspmath="mathml"><mrow class="unit"><mi mathvariant="normal">mmol</mi><mspace linebreak="nobreak" width="0.125em"/><msup><mi mathvariant="normal">m</mi><mrow><mo>-</mo><mn mathvariant="normal">2</mn></mrow></msup><mspace width="0.125em" linebreak="nobreak"/><msup><mi mathvariant="normal">d</mi><mrow><mo>-</mo><mn mathvariant="normal">1</mn></mrow></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="67pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="d4c2ee668fea12b7ca233e9f97025a6f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="bg-19-5059-2022-ie00001.svg" width="67pt" height="13pt" ... |
format |
Article in Journal/Newspaper |
author |
K. Castro-Morales A. Canning S. Arzberger W. A. Overholt K. Küsel O. Kolle M. Göckede N. Zimov A. Körtzinger |
author_facet |
K. Castro-Morales A. Canning S. Arzberger W. A. Overholt K. Küsel O. Kolle M. Göckede N. Zimov A. Körtzinger |
author_sort |
K. Castro-Morales |
title |
Highest methane concentrations in an Arctic river linked to local terrestrial inputs |
title_short |
Highest methane concentrations in an Arctic river linked to local terrestrial inputs |
title_full |
Highest methane concentrations in an Arctic river linked to local terrestrial inputs |
title_fullStr |
Highest methane concentrations in an Arctic river linked to local terrestrial inputs |
title_full_unstemmed |
Highest methane concentrations in an Arctic river linked to local terrestrial inputs |
title_sort |
highest methane concentrations in an arctic river linked to local terrestrial inputs |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-5059-2022 https://doaj.org/article/000c1ab89ca34629b8fd9d40c6167ae0 |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) |
geographic |
Arctic Kolyma |
geographic_facet |
Arctic Kolyma |
genre |
Arctic Global warming kolyma river permafrost Siberia |
genre_facet |
Arctic Global warming kolyma river permafrost Siberia |
op_source |
Biogeosciences, Vol 19, Pp 5059-5077 (2022) |
op_relation |
https://bg.copernicus.org/articles/19/5059/2022/bg-19-5059-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-5059-2022 1726-4170 1726-4189 https://doaj.org/article/000c1ab89ca34629b8fd9d40c6167ae0 |
op_doi |
https://doi.org/10.5194/bg-19-5059-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
21 |
container_start_page |
5059 |
op_container_end_page |
5077 |
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1766327719886323712 |