Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions
We present a global methane modelling study assessing the sensitivity of Arctic atmospheric CH4 mole fractions, δ13C-CH4 and δD-CH4 to uncertainties in Arctic methane sources. Model simulations include methane tracers tagged by source and isotopic composition and are compared with atmospheric data a...
Published in: | Atmospheric Chemistry and Physics |
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Language: | English |
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2016
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/61579/ https://ueaeprints.uea.ac.uk/id/eprint/61579/1/acp_16_14891_2016.pdf https://doi.org/10.5194/acp-16-14891-2016 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:61579 2023-05-15T14:26:56+02:00 Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions Warwick, Nicola J. Cain, Michelle L. Fisher, Rebecca France, James L. Lowry, David Michel, Sylvia E. Nisbet, Euan G. Vaughn, Bruce H. White, James W.C. Pyle, John A. 2016-12-01 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/61579/ https://ueaeprints.uea.ac.uk/id/eprint/61579/1/acp_16_14891_2016.pdf https://doi.org/10.5194/acp-16-14891-2016 en eng https://ueaeprints.uea.ac.uk/id/eprint/61579/1/acp_16_14891_2016.pdf Warwick, Nicola J., Cain, Michelle L., Fisher, Rebecca, France, James L., Lowry, David, Michel, Sylvia E., Nisbet, Euan G., Vaughn, Bruce H., White, James W.C. and Pyle, John A. (2016) Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions. Atmospheric Chemistry and Physics, 16. pp. 14891-14908. ISSN 1680-7324 doi:10.5194/acp-16-14891-2016 cc_by CC-BY Article PeerReviewed 2016 ftuniveastangl https://doi.org/10.5194/acp-16-14891-2016 2023-01-30T21:45:22Z We present a global methane modelling study assessing the sensitivity of Arctic atmospheric CH4 mole fractions, δ13C-CH4 and δD-CH4 to uncertainties in Arctic methane sources. Model simulations include methane tracers tagged by source and isotopic composition and are compared with atmospheric data at four northern high-latitude measurement sites. We find the model's ability to capture the magnitude and phase of observed seasonal cycles of CH4 mixing ratios, δ13C-CH4 and δD-CH4 at northern high latitudes is much improved using a later spring kick-off and autumn decline in northern high-latitude wetland emissions than predicted by most process models. Results from our model simulations indicate that recent predictions of large methane emissions from thawing submarine permafrost in the East Siberian Arctic Shelf region could only be reconciled with global-scale atmospheric observations by making large adjustments to high-latitude anthropogenic or wetland emission inventories. Article in Journal/Newspaper Arctic arctic methane Arctic permafrost University of East Anglia: UEA Digital Repository Arctic Atmospheric Chemistry and Physics 16 23 14891 14908 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
We present a global methane modelling study assessing the sensitivity of Arctic atmospheric CH4 mole fractions, δ13C-CH4 and δD-CH4 to uncertainties in Arctic methane sources. Model simulations include methane tracers tagged by source and isotopic composition and are compared with atmospheric data at four northern high-latitude measurement sites. We find the model's ability to capture the magnitude and phase of observed seasonal cycles of CH4 mixing ratios, δ13C-CH4 and δD-CH4 at northern high latitudes is much improved using a later spring kick-off and autumn decline in northern high-latitude wetland emissions than predicted by most process models. Results from our model simulations indicate that recent predictions of large methane emissions from thawing submarine permafrost in the East Siberian Arctic Shelf region could only be reconciled with global-scale atmospheric observations by making large adjustments to high-latitude anthropogenic or wetland emission inventories. |
format |
Article in Journal/Newspaper |
author |
Warwick, Nicola J. Cain, Michelle L. Fisher, Rebecca France, James L. Lowry, David Michel, Sylvia E. Nisbet, Euan G. Vaughn, Bruce H. White, James W.C. Pyle, John A. |
spellingShingle |
Warwick, Nicola J. Cain, Michelle L. Fisher, Rebecca France, James L. Lowry, David Michel, Sylvia E. Nisbet, Euan G. Vaughn, Bruce H. White, James W.C. Pyle, John A. Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
author_facet |
Warwick, Nicola J. Cain, Michelle L. Fisher, Rebecca France, James L. Lowry, David Michel, Sylvia E. Nisbet, Euan G. Vaughn, Bruce H. White, James W.C. Pyle, John A. |
author_sort |
Warwick, Nicola J. |
title |
Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_short |
Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_full |
Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_fullStr |
Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_full_unstemmed |
Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_sort |
using δ13c-ch4 and δd-ch4 to constrain arctic methane emissions |
publishDate |
2016 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/61579/ https://ueaeprints.uea.ac.uk/id/eprint/61579/1/acp_16_14891_2016.pdf https://doi.org/10.5194/acp-16-14891-2016 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic arctic methane Arctic permafrost |
genre_facet |
Arctic arctic methane Arctic permafrost |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/61579/1/acp_16_14891_2016.pdf Warwick, Nicola J., Cain, Michelle L., Fisher, Rebecca, France, James L., Lowry, David, Michel, Sylvia E., Nisbet, Euan G., Vaughn, Bruce H., White, James W.C. and Pyle, John A. (2016) Using δ13C-CH4 and δD-CH4 to constrain Arctic methane emissions. Atmospheric Chemistry and Physics, 16. pp. 14891-14908. ISSN 1680-7324 doi:10.5194/acp-16-14891-2016 |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-16-14891-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
23 |
container_start_page |
14891 |
op_container_end_page |
14908 |
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1766300420708237312 |