Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming
Future precipitation changes in a warming climate depend regionally upon the response of natural climate modes to anthropogenic forcing. North Pacific hydroclimate is dominated by the Aleutian Low, a semi-permanent wintertime feature characterized by frequent low-pressure conditions that is influenc...
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ftpubmed:oai:pubmedcentral.nih.gov:5736703 2023-05-15T13:09:38+02:00 Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming Winski, Dominic Osterberg, Erich Ferris, David Kreutz, Karl Wake, Cameron Campbell, Seth Hawley, Robert Roy, Samuel Birkel, Sean Introne, Douglas Handley, Michael 2017-12-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5736703/ http://www.ncbi.nlm.nih.gov/pubmed/29259253 https://doi.org/10.1038/s41598-017-18022-5 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5736703/ http://www.ncbi.nlm.nih.gov/pubmed/29259253 http://dx.doi.org/10.1038/s41598-017-18022-5 © 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/s41598-017-18022-5 2017-12-24T01:24:42Z Future precipitation changes in a warming climate depend regionally upon the response of natural climate modes to anthropogenic forcing. North Pacific hydroclimate is dominated by the Aleutian Low, a semi-permanent wintertime feature characterized by frequent low-pressure conditions that is influenced by tropical Pacific Ocean temperatures through the Pacific-North American (PNA) teleconnection pattern. Instrumental records show a recent increase in coastal Alaskan precipitation and Aleutian Low intensification, but are of insufficient length to accurately assess low frequency trends and forcing mechanisms. Here we present a 1200-year seasonally- to annually-resolved ice core record of snow accumulation from Mt. Hunter in the Alaska Range developed using annual layer counting and four ice-flow thinning models. Under a wide range of glacier flow conditions and layer counting uncertainty, our record shows a doubling of precipitation since ~1840 CE, with recent values exceeding the variability observed over the past millennium. The precipitation increase is nearly synchronous with the warming of western tropical Pacific and Indian Ocean sea surface temperatures. While regional 20th Century warming may account for a portion of the observed precipitation increase on Mt. Hunter, the magnitude and seasonality of the precipitation change indicate a long-term strengthening of the Aleutian Low. Text alaska range aleutian low glacier ice core Alaska PubMed Central (PMC) Indian Pacific Scientific Reports 7 1 |
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Article Winski, Dominic Osterberg, Erich Ferris, David Kreutz, Karl Wake, Cameron Campbell, Seth Hawley, Robert Roy, Samuel Birkel, Sean Introne, Douglas Handley, Michael Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming |
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Future precipitation changes in a warming climate depend regionally upon the response of natural climate modes to anthropogenic forcing. North Pacific hydroclimate is dominated by the Aleutian Low, a semi-permanent wintertime feature characterized by frequent low-pressure conditions that is influenced by tropical Pacific Ocean temperatures through the Pacific-North American (PNA) teleconnection pattern. Instrumental records show a recent increase in coastal Alaskan precipitation and Aleutian Low intensification, but are of insufficient length to accurately assess low frequency trends and forcing mechanisms. Here we present a 1200-year seasonally- to annually-resolved ice core record of snow accumulation from Mt. Hunter in the Alaska Range developed using annual layer counting and four ice-flow thinning models. Under a wide range of glacier flow conditions and layer counting uncertainty, our record shows a doubling of precipitation since ~1840 CE, with recent values exceeding the variability observed over the past millennium. The precipitation increase is nearly synchronous with the warming of western tropical Pacific and Indian Ocean sea surface temperatures. While regional 20th Century warming may account for a portion of the observed precipitation increase on Mt. Hunter, the magnitude and seasonality of the precipitation change indicate a long-term strengthening of the Aleutian Low. |
format |
Text |
author |
Winski, Dominic Osterberg, Erich Ferris, David Kreutz, Karl Wake, Cameron Campbell, Seth Hawley, Robert Roy, Samuel Birkel, Sean Introne, Douglas Handley, Michael |
author_facet |
Winski, Dominic Osterberg, Erich Ferris, David Kreutz, Karl Wake, Cameron Campbell, Seth Hawley, Robert Roy, Samuel Birkel, Sean Introne, Douglas Handley, Michael |
author_sort |
Winski, Dominic |
title |
Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming |
title_short |
Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming |
title_full |
Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming |
title_fullStr |
Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming |
title_full_unstemmed |
Industrial-age doubling of snow accumulation in the Alaska Range linked to tropical ocean warming |
title_sort |
industrial-age doubling of snow accumulation in the alaska range linked to tropical ocean warming |
publisher |
Nature Publishing Group UK |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5736703/ http://www.ncbi.nlm.nih.gov/pubmed/29259253 https://doi.org/10.1038/s41598-017-18022-5 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
alaska range aleutian low glacier ice core Alaska |
genre_facet |
alaska range aleutian low glacier ice core Alaska |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5736703/ http://www.ncbi.nlm.nih.gov/pubmed/29259253 http://dx.doi.org/10.1038/s41598-017-18022-5 |
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/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-017-18022-5 |
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Scientific Reports |
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