Using δ 13C-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...
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ftunicolboulder:oai:scholar.colorado.edu:instaar_facpapers-1011 2023-05-15T14:22:05+02:00 Using δ 13C-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. 2016-12-01T08:00:00Z application/pdf https://scholar.colorado.edu/instaar_facpapers/1 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1011&context=instaar_facpapers unknown CU Scholar https://scholar.colorado.edu/instaar_facpapers/1 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1011&context=instaar_facpapers Institute of Arctic & Alpine Research Faculty Contributions text 2016 ftunicolboulder 2018-10-07T09:05:45Z 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. Text Arctic arctic methane Arctic permafrost University of Colorado, Boulder: CU Scholar Arctic |
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University of Colorado, Boulder: CU Scholar |
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ftunicolboulder |
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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 |
Text |
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 δ 13C-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 δ 13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_short |
Using δ 13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_full |
Using δ 13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_fullStr |
Using δ 13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_full_unstemmed |
Using δ 13C-CH4 and δD-CH4 to constrain Arctic methane emissions |
title_sort |
using δ 13c-ch4 and δd-ch4 to constrain arctic methane emissions |
publisher |
CU Scholar |
publishDate |
2016 |
url |
https://scholar.colorado.edu/instaar_facpapers/1 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1011&context=instaar_facpapers |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic arctic methane Arctic permafrost |
genre_facet |
Arctic arctic methane Arctic permafrost |
op_source |
Institute of Arctic & Alpine Research Faculty Contributions |
op_relation |
https://scholar.colorado.edu/instaar_facpapers/1 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1011&context=instaar_facpapers |
_version_ |
1766294753218920448 |