Net regional methane sink in high artic soils of northeast Greenland
Arctic tundra soils serve as potentially important but poorly understood sinks of atmospheric methane (CH4), a powerful greenhouse gas1, 2, 3, 4, 5. Numerical simulations project a net increase in methane consumption in soils in high northern latitudes as a consequence of warming in the past few dec...
Published in: | Nature Geoscience |
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Online Access: | https://curis.ku.dk/portal/da/publications/net-regional-methane-sink-in-high-artic-soils-of-northeast-greenland(274b5341-0bb4-4328-ad9b-afe3e3812f2b).html https://doi.org/10.1038/NGEO2305 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/274b5341-0bb4-4328-ad9b-afe3e3812f2b 2023-05-15T14:52:37+02:00 Net regional methane sink in high artic soils of northeast Greenland Jørgensen, Christian Juncher Johansen, K. M. L. Westergaard-Nielsen, Andreas Elberling, Bo 2015 https://curis.ku.dk/portal/da/publications/net-regional-methane-sink-in-high-artic-soils-of-northeast-greenland(274b5341-0bb4-4328-ad9b-afe3e3812f2b).html https://doi.org/10.1038/NGEO2305 eng eng info:eu-repo/semantics/closedAccess Jørgensen , C J , Johansen , K M L , Westergaard-Nielsen , A & Elberling , B 2015 , ' Net regional methane sink in high artic soils of northeast Greenland ' , Nature Geoscience , vol. 8 , pp. 20-23 . https://doi.org/10.1038/NGEO2305 article 2015 ftcopenhagenunip https://doi.org/10.1038/NGEO2305 2022-02-24T00:16:41Z Arctic tundra soils serve as potentially important but poorly understood sinks of atmospheric methane (CH4), a powerful greenhouse gas1, 2, 3, 4, 5. Numerical simulations project a net increase in methane consumption in soils in high northern latitudes as a consequence of warming in the past few decades3, 6. Advances have been made in quantifying hotspots of methane emissions in Arctic wetlands7, 8, 9, 10, 11, 12, 13, but the drivers, magnitude, timing and location of methane consumption rates in High Arctic ecosystems are unclear. Here, we present measurements of rates of methane consumption in different vegetation types within the Zackenberg Valley in northeast Greenland over a full growing season. Field measurements show methane uptake in all non-water-saturated landforms studied, with seasonal averages of − 8.3 ± 3.7 μmol CH4 m−2 h−1 in dry tundra and − 3.1 ± 1.6 μmol CH4 m−2 h−1 in moist tundra. The fluxes were sensitive to temperature, with methane uptake increasing with increasing temperatures. We extrapolate our measurements and published measurements from wetlands with the help of remote-sensing land-cover classification using nine Landsat scenes. We conclude that the ice-free area of northeast Greenland acts as a net sink of atmospheric methane, and suggest that this sink will probably be enhanced under future warmer climatic conditions. Article in Journal/Newspaper Arctic Greenland Tundra Zackenberg University of Copenhagen: Research Arctic Greenland Nature Geoscience 8 1 20 23 |
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University of Copenhagen: Research |
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ftcopenhagenunip |
language |
English |
description |
Arctic tundra soils serve as potentially important but poorly understood sinks of atmospheric methane (CH4), a powerful greenhouse gas1, 2, 3, 4, 5. Numerical simulations project a net increase in methane consumption in soils in high northern latitudes as a consequence of warming in the past few decades3, 6. Advances have been made in quantifying hotspots of methane emissions in Arctic wetlands7, 8, 9, 10, 11, 12, 13, but the drivers, magnitude, timing and location of methane consumption rates in High Arctic ecosystems are unclear. Here, we present measurements of rates of methane consumption in different vegetation types within the Zackenberg Valley in northeast Greenland over a full growing season. Field measurements show methane uptake in all non-water-saturated landforms studied, with seasonal averages of − 8.3 ± 3.7 μmol CH4 m−2 h−1 in dry tundra and − 3.1 ± 1.6 μmol CH4 m−2 h−1 in moist tundra. The fluxes were sensitive to temperature, with methane uptake increasing with increasing temperatures. We extrapolate our measurements and published measurements from wetlands with the help of remote-sensing land-cover classification using nine Landsat scenes. We conclude that the ice-free area of northeast Greenland acts as a net sink of atmospheric methane, and suggest that this sink will probably be enhanced under future warmer climatic conditions. |
format |
Article in Journal/Newspaper |
author |
Jørgensen, Christian Juncher Johansen, K. M. L. Westergaard-Nielsen, Andreas Elberling, Bo |
spellingShingle |
Jørgensen, Christian Juncher Johansen, K. M. L. Westergaard-Nielsen, Andreas Elberling, Bo Net regional methane sink in high artic soils of northeast Greenland |
author_facet |
Jørgensen, Christian Juncher Johansen, K. M. L. Westergaard-Nielsen, Andreas Elberling, Bo |
author_sort |
Jørgensen, Christian Juncher |
title |
Net regional methane sink in high artic soils of northeast Greenland |
title_short |
Net regional methane sink in high artic soils of northeast Greenland |
title_full |
Net regional methane sink in high artic soils of northeast Greenland |
title_fullStr |
Net regional methane sink in high artic soils of northeast Greenland |
title_full_unstemmed |
Net regional methane sink in high artic soils of northeast Greenland |
title_sort |
net regional methane sink in high artic soils of northeast greenland |
publishDate |
2015 |
url |
https://curis.ku.dk/portal/da/publications/net-regional-methane-sink-in-high-artic-soils-of-northeast-greenland(274b5341-0bb4-4328-ad9b-afe3e3812f2b).html https://doi.org/10.1038/NGEO2305 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Tundra Zackenberg |
genre_facet |
Arctic Greenland Tundra Zackenberg |
op_source |
Jørgensen , C J , Johansen , K M L , Westergaard-Nielsen , A & Elberling , B 2015 , ' Net regional methane sink in high artic soils of northeast Greenland ' , Nature Geoscience , vol. 8 , pp. 20-23 . https://doi.org/10.1038/NGEO2305 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1038/NGEO2305 |
container_title |
Nature Geoscience |
container_volume |
8 |
container_issue |
1 |
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20 |
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23 |
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1766323849692971008 |