Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption
Northern temperate and high-latitude wetlands are a major source of the greenhouse gas methane (CH 4 ). Here, we estimate the sensitivity in the strength of this source to the effects of large Icelandic volcanic eruptions such as the Laki eruption of 1783-1784. We applied spatially explicit modeled...
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Online Access: | https://oro.open.ac.uk/25569/ https://oro.open.ac.uk/25569/1/d78193.pdf https://doi.org/10.1029/2007JG000499 |
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ftopenunivgb:oai:oro.open.ac.uk:25569 2023-06-11T04:12:42+02:00 Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption Gauci, Vincent Blake, Stephen Stevenson, David S. Highwood, Eleanor J. 2008-09-11 application/pdf https://oro.open.ac.uk/25569/ https://oro.open.ac.uk/25569/1/d78193.pdf https://doi.org/10.1029/2007JG000499 unknown https://oro.open.ac.uk/25569/1/d78193.pdf Gauci, Vincent <http://oro.open.ac.uk/view/person/vg8.html>; Blake, Stephen <http://oro.open.ac.uk/view/person/sb26.html>; Stevenson, David S. and Highwood, Eleanor J. (2008). Halving of the northern wetland CH4 source by a large Icelandic volcanic eruption. Journal of Geophysical Research: Biogeosciences, 113(G3), article no. G00A11. Journal Item Public PeerReviewed 2008 ftopenunivgb https://doi.org/10.1029/2007JG000499 2023-05-28T05:45:25Z Northern temperate and high-latitude wetlands are a major source of the greenhouse gas methane (CH 4 ). Here, we estimate the sensitivity in the strength of this source to the effects of large Icelandic volcanic eruptions such as the Laki eruption of 1783-1784. We applied spatially explicit modeled sulfate aerosol and S deposition fields from a Laki eruption simulation to a climate-sensitive model of CH 4 emissions from wetlands. We estimate that the combined influence on climate and S deposition from the Laki eruption halved the output of CH 4 from wetlands north of 30°N for the first 12 months following the eruption. The largest short-term component responsible for the CH 4 suppression is the aerosol-influenced surface cooling, although the effect of large-scale S deposition on CH 4 emissions provides a longer-term suppressive effect on emissions. Together, we estimate this combination of processes to result in an annual suppression of ~20 Tg CH 4 in the year of the eruption and two subsequent years. Further, the impact of the eruption on atmospheric CH 4 concentration extends beyond the likely duration of suppressed emission. The modeled effect of this large Icelandic eruption is consistent with ice core records of atmospheric CH 4 concentrations at the time and is equivalent, in size, to the current estimated suppressive effect of industrially derived S pollution on the global wetland CH 4 source. Article in Journal/Newspaper ice core The Open University: Open Research Online (ORO) Laki ENVELOPE(-18.237,-18.237,64.070,64.070) Journal of Geophysical Research 113 |
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Open Polar |
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The Open University: Open Research Online (ORO) |
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ftopenunivgb |
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unknown |
description |
Northern temperate and high-latitude wetlands are a major source of the greenhouse gas methane (CH 4 ). Here, we estimate the sensitivity in the strength of this source to the effects of large Icelandic volcanic eruptions such as the Laki eruption of 1783-1784. We applied spatially explicit modeled sulfate aerosol and S deposition fields from a Laki eruption simulation to a climate-sensitive model of CH 4 emissions from wetlands. We estimate that the combined influence on climate and S deposition from the Laki eruption halved the output of CH 4 from wetlands north of 30°N for the first 12 months following the eruption. The largest short-term component responsible for the CH 4 suppression is the aerosol-influenced surface cooling, although the effect of large-scale S deposition on CH 4 emissions provides a longer-term suppressive effect on emissions. Together, we estimate this combination of processes to result in an annual suppression of ~20 Tg CH 4 in the year of the eruption and two subsequent years. Further, the impact of the eruption on atmospheric CH 4 concentration extends beyond the likely duration of suppressed emission. The modeled effect of this large Icelandic eruption is consistent with ice core records of atmospheric CH 4 concentrations at the time and is equivalent, in size, to the current estimated suppressive effect of industrially derived S pollution on the global wetland CH 4 source. |
format |
Article in Journal/Newspaper |
author |
Gauci, Vincent Blake, Stephen Stevenson, David S. Highwood, Eleanor J. |
spellingShingle |
Gauci, Vincent Blake, Stephen Stevenson, David S. Highwood, Eleanor J. Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption |
author_facet |
Gauci, Vincent Blake, Stephen Stevenson, David S. Highwood, Eleanor J. |
author_sort |
Gauci, Vincent |
title |
Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption |
title_short |
Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption |
title_full |
Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption |
title_fullStr |
Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption |
title_full_unstemmed |
Halving of the northern wetland CH 4 source by a large Icelandic volcanic eruption |
title_sort |
halving of the northern wetland ch 4 source by a large icelandic volcanic eruption |
publishDate |
2008 |
url |
https://oro.open.ac.uk/25569/ https://oro.open.ac.uk/25569/1/d78193.pdf https://doi.org/10.1029/2007JG000499 |
long_lat |
ENVELOPE(-18.237,-18.237,64.070,64.070) |
geographic |
Laki |
geographic_facet |
Laki |
genre |
ice core |
genre_facet |
ice core |
op_relation |
https://oro.open.ac.uk/25569/1/d78193.pdf Gauci, Vincent <http://oro.open.ac.uk/view/person/vg8.html>; Blake, Stephen <http://oro.open.ac.uk/view/person/sb26.html>; Stevenson, David S. and Highwood, Eleanor J. (2008). Halving of the northern wetland CH4 source by a large Icelandic volcanic eruption. Journal of Geophysical Research: Biogeosciences, 113(G3), article no. G00A11. |
op_doi |
https://doi.org/10.1029/2007JG000499 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
_version_ |
1768388733996892160 |