Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex
Sulfur hexafluoride (SF6) is a greenhouse gas with one of the highest radiative efficiencies in the atmosphere as well as an important indicator of transport time scales in the stratosphere. The current widely used estimate of the atmospheric lifetime of SF6 is 3200 years. In this study we use in si...
Published in: | Journal of Geophysical Research: Atmospheres |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:63204 2023-06-06T11:51:12+02:00 Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex Ray, Eric A. Moore, Fred L. Elkins, James W. Rosenlof, Karen H. Laube, Johannes C. Röckmann, Thomas Marsh, Daniel R. Andrews, Arlyn E. 2017-04-27 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/63204/ https://ueaeprints.uea.ac.uk/id/eprint/63204/1/Accepted_manuscript.pdf https://ueaeprints.uea.ac.uk/id/eprint/63204/4/Ray_et_al_2017_Journal_of_Geophysical_Research_Atmospheres.pdf https://doi.org/10.1002/2016JD026198 en eng https://ueaeprints.uea.ac.uk/id/eprint/63204/1/Accepted_manuscript.pdf https://ueaeprints.uea.ac.uk/id/eprint/63204/4/Ray_et_al_2017_Journal_of_Geophysical_Research_Atmospheres.pdf Ray, Eric A., Moore, Fred L., Elkins, James W., Rosenlof, Karen H., Laube, Johannes C., Röckmann, Thomas, Marsh, Daniel R. and Andrews, Arlyn E. (2017) Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex. Journal of Geophysical Research: Atmospheres, 122 (8). 4626–4638. ISSN 2169-897X doi:10.1002/2016JD026198 Article PeerReviewed 2017 ftuniveastangl https://doi.org/10.1002/2016JD026198 2023-04-13T22:31:58Z Sulfur hexafluoride (SF6) is a greenhouse gas with one of the highest radiative efficiencies in the atmosphere as well as an important indicator of transport time scales in the stratosphere. The current widely used estimate of the atmospheric lifetime of SF6 is 3200 years. In this study we use in situ measurements in the 2000 Arctic polar vortex that sampled air with up to 50% SF6 loss to calculate an SF6 lifetime. Comparison of these measurements with output from the Whole Atmosphere Community Climate Model (WACCM) shows that WACCM transport into the vortex is accurate and that an important SF6 loss mechanism, believed to be electron attachment, is missing in the model. Based on the measurements and estimates of the size of the vortex, we calculate an SF6 lifetime of 850 years with an uncertainty range of 580–1400 years. The amount of SF6 loss is shown to be consistent with that of HFC-227ea, which has a lifetime of 670–780 years, adding independent support to our new SF6 lifetime estimate. Based on the revised lifetime the global warming potential of SF6 will decrease only slightly for short time horizons (<100 years) but will decrease substantially for time horizons longer than 2000 years. Also, the use of SF6 measurements as an indicator of transport time scales in the stratosphere clearly must account for potential influence from polar vortex air. Article in Journal/Newspaper Arctic Global warming University of East Anglia: UEA Digital Repository Arctic Journal of Geophysical Research: Atmospheres 122 8 4626 4638 |
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Open Polar |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
language |
English |
description |
Sulfur hexafluoride (SF6) is a greenhouse gas with one of the highest radiative efficiencies in the atmosphere as well as an important indicator of transport time scales in the stratosphere. The current widely used estimate of the atmospheric lifetime of SF6 is 3200 years. In this study we use in situ measurements in the 2000 Arctic polar vortex that sampled air with up to 50% SF6 loss to calculate an SF6 lifetime. Comparison of these measurements with output from the Whole Atmosphere Community Climate Model (WACCM) shows that WACCM transport into the vortex is accurate and that an important SF6 loss mechanism, believed to be electron attachment, is missing in the model. Based on the measurements and estimates of the size of the vortex, we calculate an SF6 lifetime of 850 years with an uncertainty range of 580–1400 years. The amount of SF6 loss is shown to be consistent with that of HFC-227ea, which has a lifetime of 670–780 years, adding independent support to our new SF6 lifetime estimate. Based on the revised lifetime the global warming potential of SF6 will decrease only slightly for short time horizons (<100 years) but will decrease substantially for time horizons longer than 2000 years. Also, the use of SF6 measurements as an indicator of transport time scales in the stratosphere clearly must account for potential influence from polar vortex air. |
format |
Article in Journal/Newspaper |
author |
Ray, Eric A. Moore, Fred L. Elkins, James W. Rosenlof, Karen H. Laube, Johannes C. Röckmann, Thomas Marsh, Daniel R. Andrews, Arlyn E. |
spellingShingle |
Ray, Eric A. Moore, Fred L. Elkins, James W. Rosenlof, Karen H. Laube, Johannes C. Röckmann, Thomas Marsh, Daniel R. Andrews, Arlyn E. Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
author_facet |
Ray, Eric A. Moore, Fred L. Elkins, James W. Rosenlof, Karen H. Laube, Johannes C. Röckmann, Thomas Marsh, Daniel R. Andrews, Arlyn E. |
author_sort |
Ray, Eric A. |
title |
Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
title_short |
Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
title_full |
Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
title_fullStr |
Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
title_full_unstemmed |
Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
title_sort |
quantification of the sf6 lifetime based on mesospheric loss measured in the stratospheric polar vortex |
publishDate |
2017 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/63204/ https://ueaeprints.uea.ac.uk/id/eprint/63204/1/Accepted_manuscript.pdf https://ueaeprints.uea.ac.uk/id/eprint/63204/4/Ray_et_al_2017_Journal_of_Geophysical_Research_Atmospheres.pdf https://doi.org/10.1002/2016JD026198 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming |
genre_facet |
Arctic Global warming |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/63204/1/Accepted_manuscript.pdf https://ueaeprints.uea.ac.uk/id/eprint/63204/4/Ray_et_al_2017_Journal_of_Geophysical_Research_Atmospheres.pdf Ray, Eric A., Moore, Fred L., Elkins, James W., Rosenlof, Karen H., Laube, Johannes C., Röckmann, Thomas, Marsh, Daniel R. and Andrews, Arlyn E. (2017) Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex. Journal of Geophysical Research: Atmospheres, 122 (8). 4626–4638. ISSN 2169-897X doi:10.1002/2016JD026198 |
op_doi |
https://doi.org/10.1002/2016JD026198 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
122 |
container_issue |
8 |
container_start_page |
4626 |
op_container_end_page |
4638 |
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1767956921952763904 |