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δ(13)C methane source signatures from tropical wetland and rice field emissions
The atmospheric methane (CH(4)) burden is rising sharply, but the causes are still not well understood. One factor of uncertainty is the importance of tropical CH(4) emissions into the global mix. Isotopic signatures of major sources remain poorly constrained, despite their usefulness in constrainin...
Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8646146/ https://www.ncbi.nlm.nih.gov/pubmed/34865534 http://dx.doi.org/10.1098/rsta.2020.0449 |
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author | France, James L. Fisher, Rebecca E. Lowry, David Allen, Grant Andrade, Marcos F. Bauguitte, Stéphane J.-B. Bower, Keith Broderick, Timothy J. Daly, Michael C. Forster, Grant Gondwe, Mangaliso Helfter, Carole Hoyt, Alison M. Jones, Anna E. Lanoisellé, Mathias Moreno, Isabel Nisbet-Jones, Peter B. R. Oram, David Pasternak, Dominika Pitt, Joseph R. Skiba, Ute Stephens, Mark Wilde, Shona E. Nisbet, Euan G. |
author_facet | France, James L. Fisher, Rebecca E. Lowry, David Allen, Grant Andrade, Marcos F. Bauguitte, Stéphane J.-B. Bower, Keith Broderick, Timothy J. Daly, Michael C. Forster, Grant Gondwe, Mangaliso Helfter, Carole Hoyt, Alison M. Jones, Anna E. Lanoisellé, Mathias Moreno, Isabel Nisbet-Jones, Peter B. R. Oram, David Pasternak, Dominika Pitt, Joseph R. Skiba, Ute Stephens, Mark Wilde, Shona E. Nisbet, Euan G. |
author_sort | France, James L. |
collection | PubMed |
description | The atmospheric methane (CH(4)) burden is rising sharply, but the causes are still not well understood. One factor of uncertainty is the importance of tropical CH(4) emissions into the global mix. Isotopic signatures of major sources remain poorly constrained, despite their usefulness in constraining the global methane budget. Here, a collection of new δ(13)C(CH(4)) signatures is presented for a range of tropical wetlands and rice fields determined from air samples collected during campaigns from 2016 to 2020. Long-term monitoring of δ(13)C(CH(4)) in ambient air has been conducted at the Chacaltaya observatory, Bolivia and Southern Botswana. Both long-term records are dominated by biogenic CH(4) sources, with isotopic signatures expected from wetland sources. From the longer-term Bolivian record, a seasonal isotopic shift is observed corresponding to wetland extent suggesting that there is input of relatively isotopically light CH(4) to the atmosphere during periods of reduced wetland extent. This new data expands the geographical extent and range of measurements of tropical wetland and rice δ(13)C(CH(4)) sources and hints at significant seasonal variation in tropical wetland δ(13)C(CH(4)) signatures which may be important to capture in future global and regional models. This article is part of a discussion meeting issue ‘Rising methane: is warming feeding warming? (part 2)’. |
format | Online Article Text |
id | pubmed-8646146 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-86461462022-02-02 δ(13)C methane source signatures from tropical wetland and rice field emissions France, James L. Fisher, Rebecca E. Lowry, David Allen, Grant Andrade, Marcos F. Bauguitte, Stéphane J.-B. Bower, Keith Broderick, Timothy J. Daly, Michael C. Forster, Grant Gondwe, Mangaliso Helfter, Carole Hoyt, Alison M. Jones, Anna E. Lanoisellé, Mathias Moreno, Isabel Nisbet-Jones, Peter B. R. Oram, David Pasternak, Dominika Pitt, Joseph R. Skiba, Ute Stephens, Mark Wilde, Shona E. Nisbet, Euan G. Philos Trans A Math Phys Eng Sci Articles The atmospheric methane (CH(4)) burden is rising sharply, but the causes are still not well understood. One factor of uncertainty is the importance of tropical CH(4) emissions into the global mix. Isotopic signatures of major sources remain poorly constrained, despite their usefulness in constraining the global methane budget. Here, a collection of new δ(13)C(CH(4)) signatures is presented for a range of tropical wetlands and rice fields determined from air samples collected during campaigns from 2016 to 2020. Long-term monitoring of δ(13)C(CH(4)) in ambient air has been conducted at the Chacaltaya observatory, Bolivia and Southern Botswana. Both long-term records are dominated by biogenic CH(4) sources, with isotopic signatures expected from wetland sources. From the longer-term Bolivian record, a seasonal isotopic shift is observed corresponding to wetland extent suggesting that there is input of relatively isotopically light CH(4) to the atmosphere during periods of reduced wetland extent. This new data expands the geographical extent and range of measurements of tropical wetland and rice δ(13)C(CH(4)) sources and hints at significant seasonal variation in tropical wetland δ(13)C(CH(4)) signatures which may be important to capture in future global and regional models. This article is part of a discussion meeting issue ‘Rising methane: is warming feeding warming? (part 2)’. The Royal Society 2022-01-24 2021-12-06 /pmc/articles/PMC8646146/ /pubmed/34865534 http://dx.doi.org/10.1098/rsta.2020.0449 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Articles France, James L. Fisher, Rebecca E. Lowry, David Allen, Grant Andrade, Marcos F. Bauguitte, Stéphane J.-B. Bower, Keith Broderick, Timothy J. Daly, Michael C. Forster, Grant Gondwe, Mangaliso Helfter, Carole Hoyt, Alison M. Jones, Anna E. Lanoisellé, Mathias Moreno, Isabel Nisbet-Jones, Peter B. R. Oram, David Pasternak, Dominika Pitt, Joseph R. Skiba, Ute Stephens, Mark Wilde, Shona E. Nisbet, Euan G. δ(13)C methane source signatures from tropical wetland and rice field emissions |
title | δ(13)C methane source signatures from tropical wetland and rice field emissions |
title_full | δ(13)C methane source signatures from tropical wetland and rice field emissions |
title_fullStr | δ(13)C methane source signatures from tropical wetland and rice field emissions |
title_full_unstemmed | δ(13)C methane source signatures from tropical wetland and rice field emissions |
title_short | δ(13)C methane source signatures from tropical wetland and rice field emissions |
title_sort | δ(13)c methane source signatures from tropical wetland and rice field emissions |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8646146/ https://www.ncbi.nlm.nih.gov/pubmed/34865534 http://dx.doi.org/10.1098/rsta.2020.0449 |
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