Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes
Large-scale atmospheric pressure centers, such as the Aleutian and Icelandic Low, have a demonstrated relationship with physical lake characteristics in contemporary monitoring studies, but the responses to these phenomena are rarely observed in lake records. We observe coherent changes in the strat...
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crsagepubl:10.1177/0959683616632886 2024-06-23T07:45:14+00:00 Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes Stone, Jeffery R Saros, Jasmine E Pederson, Gregory T 2016 http://dx.doi.org/10.1177/0959683616632886 http://journals.sagepub.com/doi/pdf/10.1177/0959683616632886 http://journals.sagepub.com/doi/full-xml/10.1177/0959683616632886 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 26, issue 7, page 1103-1111 ISSN 0959-6836 1477-0911 journal-article 2016 crsagepubl https://doi.org/10.1177/0959683616632886 2024-06-04T06:27:46Z Large-scale atmospheric pressure centers, such as the Aleutian and Icelandic Low, have a demonstrated relationship with physical lake characteristics in contemporary monitoring studies, but the responses to these phenomena are rarely observed in lake records. We observe coherent changes in the stratification patterns of three deep (>30 m) lakes inferred from fossil diatom assemblages as a response to shifts in the location and intensity of the Aleutian Low and compare these changes with similar long-term changes observed in the δ 18 O record from the Yukon. Specifically, these records indicate that between 3.2 and 1.4 ka, the Aleutian Low shifted westward, resulting in an increased frequency of storm tracks across the Pacific Northwest during winter and spring. This change in atmospheric circulation ultimately produced deeper mixing in the upper waters of these three lake systems. Enhanced stratification between 4.5 and 3.3 ka and from 1.3 ka to present suggests a strengthened Aleutian Low and more meridional circulation. Article in Journal/Newspaper aleutian low Yukon SAGE Publications Pacific Yukon The Holocene 26 7 1103 1111 |
institution |
Open Polar |
collection |
SAGE Publications |
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crsagepubl |
language |
English |
description |
Large-scale atmospheric pressure centers, such as the Aleutian and Icelandic Low, have a demonstrated relationship with physical lake characteristics in contemporary monitoring studies, but the responses to these phenomena are rarely observed in lake records. We observe coherent changes in the stratification patterns of three deep (>30 m) lakes inferred from fossil diatom assemblages as a response to shifts in the location and intensity of the Aleutian Low and compare these changes with similar long-term changes observed in the δ 18 O record from the Yukon. Specifically, these records indicate that between 3.2 and 1.4 ka, the Aleutian Low shifted westward, resulting in an increased frequency of storm tracks across the Pacific Northwest during winter and spring. This change in atmospheric circulation ultimately produced deeper mixing in the upper waters of these three lake systems. Enhanced stratification between 4.5 and 3.3 ka and from 1.3 ka to present suggests a strengthened Aleutian Low and more meridional circulation. |
format |
Article in Journal/Newspaper |
author |
Stone, Jeffery R Saros, Jasmine E Pederson, Gregory T |
spellingShingle |
Stone, Jeffery R Saros, Jasmine E Pederson, Gregory T Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes |
author_facet |
Stone, Jeffery R Saros, Jasmine E Pederson, Gregory T |
author_sort |
Stone, Jeffery R |
title |
Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes |
title_short |
Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes |
title_full |
Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes |
title_fullStr |
Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes |
title_full_unstemmed |
Coherent late-Holocene climate-driven shifts in the structure of three Rocky Mountain lakes |
title_sort |
coherent late-holocene climate-driven shifts in the structure of three rocky mountain lakes |
publisher |
SAGE Publications |
publishDate |
2016 |
url |
http://dx.doi.org/10.1177/0959683616632886 http://journals.sagepub.com/doi/pdf/10.1177/0959683616632886 http://journals.sagepub.com/doi/full-xml/10.1177/0959683616632886 |
geographic |
Pacific Yukon |
geographic_facet |
Pacific Yukon |
genre |
aleutian low Yukon |
genre_facet |
aleutian low Yukon |
op_source |
The Holocene volume 26, issue 7, page 1103-1111 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683616632886 |
container_title |
The Holocene |
container_volume |
26 |
container_issue |
7 |
container_start_page |
1103 |
op_container_end_page |
1111 |
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1802638408486486016 |