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Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic
In the Northern Hemisphere, most mountain glaciers experienced their largest extent in the last millennium during the Little Ice Age (1450 to 1850 CE, LIA), a period marked by colder hemispheric temperatures than the Medieval Climate Anomaly (950 to 1250 CE, MCA), a period which coincided with glaci...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5016737/ https://www.ncbi.nlm.nih.gov/pubmed/27609585 http://dx.doi.org/10.1038/srep32984 |
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author | Jomelli, Vincent Lane, Timothy Favier, Vincent Masson-Delmotte, Valerie Swingedouw, Didier Rinterknecht, Vincent Schimmelpfennig, Irene Brunstein, Daniel Verfaillie, Deborah Adamson, Kathryn Leanni, Laëtitia Mokadem, Fatima |
author_facet | Jomelli, Vincent Lane, Timothy Favier, Vincent Masson-Delmotte, Valerie Swingedouw, Didier Rinterknecht, Vincent Schimmelpfennig, Irene Brunstein, Daniel Verfaillie, Deborah Adamson, Kathryn Leanni, Laëtitia Mokadem, Fatima |
author_sort | Jomelli, Vincent |
collection | PubMed |
description | In the Northern Hemisphere, most mountain glaciers experienced their largest extent in the last millennium during the Little Ice Age (1450 to 1850 CE, LIA), a period marked by colder hemispheric temperatures than the Medieval Climate Anomaly (950 to 1250 CE, MCA), a period which coincided with glacier retreat. Here, we present a new moraine chronology based on (36)Cl surface exposure dating from Lyngmarksbræen glacier, West Greenland. Consistent with other glaciers in the western Arctic, Lyngmarksbræen glacier experienced several advances during the last millennium, the first one at the end of the MCA, in ~1200 CE, was of similar amplitude to two other advances during the LIA. In the absence of any significant changes in accumulation records from South Greenland ice cores, we attribute this expansion to multi-decadal summer cooling likely driven by volcanic and/or solar forcing, and associated regional sea-ice feedbacks. Such regional multi-decadal cold conditions at the end of the MCA are neither resolved in temperature reconstructions from other parts of the Northern Hemisphere, nor captured in last millennium climate simulations. |
format | Online Article Text |
id | pubmed-5016737 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50167372016-09-12 Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic Jomelli, Vincent Lane, Timothy Favier, Vincent Masson-Delmotte, Valerie Swingedouw, Didier Rinterknecht, Vincent Schimmelpfennig, Irene Brunstein, Daniel Verfaillie, Deborah Adamson, Kathryn Leanni, Laëtitia Mokadem, Fatima Sci Rep Article In the Northern Hemisphere, most mountain glaciers experienced their largest extent in the last millennium during the Little Ice Age (1450 to 1850 CE, LIA), a period marked by colder hemispheric temperatures than the Medieval Climate Anomaly (950 to 1250 CE, MCA), a period which coincided with glacier retreat. Here, we present a new moraine chronology based on (36)Cl surface exposure dating from Lyngmarksbræen glacier, West Greenland. Consistent with other glaciers in the western Arctic, Lyngmarksbræen glacier experienced several advances during the last millennium, the first one at the end of the MCA, in ~1200 CE, was of similar amplitude to two other advances during the LIA. In the absence of any significant changes in accumulation records from South Greenland ice cores, we attribute this expansion to multi-decadal summer cooling likely driven by volcanic and/or solar forcing, and associated regional sea-ice feedbacks. Such regional multi-decadal cold conditions at the end of the MCA are neither resolved in temperature reconstructions from other parts of the Northern Hemisphere, nor captured in last millennium climate simulations. Nature Publishing Group 2016-09-09 /pmc/articles/PMC5016737/ /pubmed/27609585 http://dx.doi.org/10.1038/srep32984 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Jomelli, Vincent Lane, Timothy Favier, Vincent Masson-Delmotte, Valerie Swingedouw, Didier Rinterknecht, Vincent Schimmelpfennig, Irene Brunstein, Daniel Verfaillie, Deborah Adamson, Kathryn Leanni, Laëtitia Mokadem, Fatima Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic |
title | Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic |
title_full | Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic |
title_fullStr | Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic |
title_full_unstemmed | Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic |
title_short | Paradoxical cold conditions during the medieval climate anomaly in the Western Arctic |
title_sort | paradoxical cold conditions during the medieval climate anomaly in the western arctic |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5016737/ https://www.ncbi.nlm.nih.gov/pubmed/27609585 http://dx.doi.org/10.1038/srep32984 |
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