Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate
Although Great Basin paleoclimate history has been examined for more than a century, the orbital-scale paleoclimate forcings remain poorly understood. Here we show – by a detailed phasing analysis of a well-dated stalagmite δ18O time series – that Great Basin paleoclimate is linearly related to, but...
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ftpubmed:oai:pubmedcentral.nih.gov:5636905 2023-05-15T14:30:58+02:00 Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate Lachniet, Matthew Asmerom, Yemane Polyak, Victor Denniston, Rhawn 2017-10-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5636905/ http://www.ncbi.nlm.nih.gov/pubmed/29021632 https://doi.org/10.1038/s41598-017-13279-2 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5636905/ http://www.ncbi.nlm.nih.gov/pubmed/29021632 http://dx.doi.org/10.1038/s41598-017-13279-2 © The Author(s) 2017 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/. CC-BY Article Text 2017 ftpubmed https://doi.org/10.1038/s41598-017-13279-2 2017-10-22T00:11:14Z Although Great Basin paleoclimate history has been examined for more than a century, the orbital-scale paleoclimate forcings remain poorly understood. Here we show – by a detailed phasing analysis of a well-dated stalagmite δ18O time series – that Great Basin paleoclimate is linearly related to, but lagged, the 23,000 yr precession cycle in northern hemisphere summer insolation by an average of 3240 years (−900 to 6600 yr range) over the last two glacial cycles. We interpret these lags as indicating that Great Basin climate is sensitive to and indirectly forced by changes in the cryosphere, as evidenced by fast and strong linkages to global ice volume and Arctic paleoclimate indicators. Mid-latitude atmospheric circulation was likely impacted by a northward shifted storm track and higher pressure over the region arising from decreased sea ice and snow cover. Because anthropogenic warming is expected to reduce northern hemisphere snow and ice cover, continued increase in atmospheric greenhouse gases is likely to result in warming and drying over coming centuries that will amplify a warming trend that began ~2400 years ago. Text arctic cryosphere Arctic Sea ice PubMed Central (PMC) Arctic Scientific Reports 7 1 |
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Article Lachniet, Matthew Asmerom, Yemane Polyak, Victor Denniston, Rhawn Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate |
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Article |
description |
Although Great Basin paleoclimate history has been examined for more than a century, the orbital-scale paleoclimate forcings remain poorly understood. Here we show – by a detailed phasing analysis of a well-dated stalagmite δ18O time series – that Great Basin paleoclimate is linearly related to, but lagged, the 23,000 yr precession cycle in northern hemisphere summer insolation by an average of 3240 years (−900 to 6600 yr range) over the last two glacial cycles. We interpret these lags as indicating that Great Basin climate is sensitive to and indirectly forced by changes in the cryosphere, as evidenced by fast and strong linkages to global ice volume and Arctic paleoclimate indicators. Mid-latitude atmospheric circulation was likely impacted by a northward shifted storm track and higher pressure over the region arising from decreased sea ice and snow cover. Because anthropogenic warming is expected to reduce northern hemisphere snow and ice cover, continued increase in atmospheric greenhouse gases is likely to result in warming and drying over coming centuries that will amplify a warming trend that began ~2400 years ago. |
format |
Text |
author |
Lachniet, Matthew Asmerom, Yemane Polyak, Victor Denniston, Rhawn |
author_facet |
Lachniet, Matthew Asmerom, Yemane Polyak, Victor Denniston, Rhawn |
author_sort |
Lachniet, Matthew |
title |
Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate |
title_short |
Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate |
title_full |
Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate |
title_fullStr |
Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate |
title_full_unstemmed |
Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate |
title_sort |
arctic cryosphere and milankovitch forcing of great basin paleoclimate |
publisher |
Nature Publishing Group UK |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5636905/ http://www.ncbi.nlm.nih.gov/pubmed/29021632 https://doi.org/10.1038/s41598-017-13279-2 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
arctic cryosphere Arctic Sea ice |
genre_facet |
arctic cryosphere Arctic Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5636905/ http://www.ncbi.nlm.nih.gov/pubmed/29021632 http://dx.doi.org/10.1038/s41598-017-13279-2 |
op_rights |
© The Author(s) 2017 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/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41598-017-13279-2 |
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Scientific Reports |
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