Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming
Predicting changes to methane cycling in Arctic lakes is of global concern in a warming world but records constraining lake methane dynamics with past warming are rare. Here, we demonstrate that the hydrogen isotopic composition (δ 2 H) of mid-chain waxes derived from aquatic moss clearly decouples...
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Online Access: | http://dx.doi.org/10.1126/sciadv.adh9704 https://www.science.org/doi/pdf/10.1126/sciadv.adh9704 |
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craaas:10.1126/sciadv.adh9704 2024-06-23T07:49:43+00:00 Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming McFarlin, Jamie M. Axford, Yarrow Kusch, Stephanie Masterson, Andrew L. Lasher, G. Everett Osburn, Magdalena R. 2023 http://dx.doi.org/10.1126/sciadv.adh9704 https://www.science.org/doi/pdf/10.1126/sciadv.adh9704 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 9, issue 39 ISSN 2375-2548 journal-article 2023 craaas https://doi.org/10.1126/sciadv.adh9704 2024-06-06T04:01:00Z Predicting changes to methane cycling in Arctic lakes is of global concern in a warming world but records constraining lake methane dynamics with past warming are rare. Here, we demonstrate that the hydrogen isotopic composition (δ 2 H) of mid-chain waxes derived from aquatic moss clearly decouples from precipitation during past Holocene warmth and instead records incorporation of methane in plant biomass. Trends in δ 2 H moss and δ 13 C moss values point to widespread Middle Holocene (11,700 to 4200 years ago) shifts in lake methane cycling across Greenland during millennia of elevated summer temperatures, heightened productivity, and lowered hypolimnetic oxygen. These data reveal ongoing warming may lead to increases in methane-derived C in many Arctic lakes, including lakes where methane is not a major component of the C cycle today. This work highlights a previously unrecognized mechanism influencing δ 2 H values of mid-chain wax and draws attention to the unquantified role of common aquatic mosses as a potentially important sink of lake methane across the Arctic. Article in Journal/Newspaper Arctic Greenland AAAS Resource Center (American Association for the Advancement of Science) Arctic Greenland Science Advances 9 39 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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English |
description |
Predicting changes to methane cycling in Arctic lakes is of global concern in a warming world but records constraining lake methane dynamics with past warming are rare. Here, we demonstrate that the hydrogen isotopic composition (δ 2 H) of mid-chain waxes derived from aquatic moss clearly decouples from precipitation during past Holocene warmth and instead records incorporation of methane in plant biomass. Trends in δ 2 H moss and δ 13 C moss values point to widespread Middle Holocene (11,700 to 4200 years ago) shifts in lake methane cycling across Greenland during millennia of elevated summer temperatures, heightened productivity, and lowered hypolimnetic oxygen. These data reveal ongoing warming may lead to increases in methane-derived C in many Arctic lakes, including lakes where methane is not a major component of the C cycle today. This work highlights a previously unrecognized mechanism influencing δ 2 H values of mid-chain wax and draws attention to the unquantified role of common aquatic mosses as a potentially important sink of lake methane across the Arctic. |
format |
Article in Journal/Newspaper |
author |
McFarlin, Jamie M. Axford, Yarrow Kusch, Stephanie Masterson, Andrew L. Lasher, G. Everett Osburn, Magdalena R. |
spellingShingle |
McFarlin, Jamie M. Axford, Yarrow Kusch, Stephanie Masterson, Andrew L. Lasher, G. Everett Osburn, Magdalena R. Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming |
author_facet |
McFarlin, Jamie M. Axford, Yarrow Kusch, Stephanie Masterson, Andrew L. Lasher, G. Everett Osburn, Magdalena R. |
author_sort |
McFarlin, Jamie M. |
title |
Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming |
title_short |
Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming |
title_full |
Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming |
title_fullStr |
Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming |
title_full_unstemmed |
Aquatic plant wax hydrogen and carbon isotopes in Greenland lakes record shifts in methane cycling during past Holocene warming |
title_sort |
aquatic plant wax hydrogen and carbon isotopes in greenland lakes record shifts in methane cycling during past holocene warming |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/sciadv.adh9704 https://www.science.org/doi/pdf/10.1126/sciadv.adh9704 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Science Advances volume 9, issue 39 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.adh9704 |
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Science Advances |
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9 |
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39 |
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1802640315964719104 |