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Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum
Eastern Beringia is one of the few Western Arctic regions where full Holocene climate reconstructions are possible. However, most full Holocene reconstructions in Eastern Beringia are based either on pollen or midges, which show conflicting early Holocene summer temperature histories. This discrepan...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456611/ https://www.ncbi.nlm.nih.gov/pubmed/30967540 http://dx.doi.org/10.1038/s41467-019-09622-y |
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author | Porter, Trevor J. Schoenemann, Spruce W. Davies, Lauren J. Steig, Eric J. Bandara, Sasiri Froese, Duane G. |
author_facet | Porter, Trevor J. Schoenemann, Spruce W. Davies, Lauren J. Steig, Eric J. Bandara, Sasiri Froese, Duane G. |
author_sort | Porter, Trevor J. |
collection | PubMed |
description | Eastern Beringia is one of the few Western Arctic regions where full Holocene climate reconstructions are possible. However, most full Holocene reconstructions in Eastern Beringia are based either on pollen or midges, which show conflicting early Holocene summer temperature histories. This discrepancy precludes understanding the factors that drove past (and potentially future) climate change and calls for independent proxies to advance the debate. We present a ~13.6 ka summer temperature reconstruction in central Yukon, part of Eastern Beringia, using precipitation isotopes in syngenetic permafrost. The reconstruction shows that early Holocene summers were consistently warmer than the Holocene mean, as supported by midges, and a thermal maximum at ~7.6–6.6 ka BP. This maximum was followed by a ~6 ka cooling, and later abruptly reversed by industrial-era warming leading to a modern climate that is unprecedented in the Holocene context and exceeds the Holocene thermal maximum by +1.7 ± 0.7 °C. |
format | Online Article Text |
id | pubmed-6456611 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-64566112019-04-11 Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum Porter, Trevor J. Schoenemann, Spruce W. Davies, Lauren J. Steig, Eric J. Bandara, Sasiri Froese, Duane G. Nat Commun Article Eastern Beringia is one of the few Western Arctic regions where full Holocene climate reconstructions are possible. However, most full Holocene reconstructions in Eastern Beringia are based either on pollen or midges, which show conflicting early Holocene summer temperature histories. This discrepancy precludes understanding the factors that drove past (and potentially future) climate change and calls for independent proxies to advance the debate. We present a ~13.6 ka summer temperature reconstruction in central Yukon, part of Eastern Beringia, using precipitation isotopes in syngenetic permafrost. The reconstruction shows that early Holocene summers were consistently warmer than the Holocene mean, as supported by midges, and a thermal maximum at ~7.6–6.6 ka BP. This maximum was followed by a ~6 ka cooling, and later abruptly reversed by industrial-era warming leading to a modern climate that is unprecedented in the Holocene context and exceeds the Holocene thermal maximum by +1.7 ± 0.7 °C. Nature Publishing Group UK 2019-04-09 /pmc/articles/PMC6456611/ /pubmed/30967540 http://dx.doi.org/10.1038/s41467-019-09622-y Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Porter, Trevor J. Schoenemann, Spruce W. Davies, Lauren J. Steig, Eric J. Bandara, Sasiri Froese, Duane G. Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum |
title | Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum |
title_full | Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum |
title_fullStr | Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum |
title_full_unstemmed | Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum |
title_short | Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum |
title_sort | recent summer warming in northwestern canada exceeds the holocene thermal maximum |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456611/ https://www.ncbi.nlm.nih.gov/pubmed/30967540 http://dx.doi.org/10.1038/s41467-019-09622-y |
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