Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA
We quantify retreat rates for three alpine glaciers in the Sawatch Range of the southern Rocky Mountains following the Last Glacial Maximum using 10Be ages from ice-sculpted, valley-floor bedrock transects and statistical analysis via the BACON program in R. Glacier retreat in the Sawatch Range from...
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2020
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00053061 2023-05-15T16:41:04+02:00 Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA Tulenko, Joseph P. Caffee, William Schweinsberg, Avriel D. Briner, Jason P. Leonard, Eric M. 2020-09 electronic https://doi.org/10.5194/gchron-2-245-2020 https://noa.gwlb.de/receive/cop_mods_00053061 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00052714/gchron-2-245-2020.pdf https://gchron.copernicus.org/articles/2/245/2020/gchron-2-245-2020.pdf eng eng Copernicus Publications Geochronology -- https://www.geochronology.net/ -- 2628-3719 https://doi.org/10.5194/gchron-2-245-2020 https://noa.gwlb.de/receive/cop_mods_00053061 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00052714/gchron-2-245-2020.pdf https://gchron.copernicus.org/articles/2/245/2020/gchron-2-245-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/gchron-2-245-2020 2022-02-08T22:35:40Z We quantify retreat rates for three alpine glaciers in the Sawatch Range of the southern Rocky Mountains following the Last Glacial Maximum using 10Be ages from ice-sculpted, valley-floor bedrock transects and statistical analysis via the BACON program in R. Glacier retreat in the Sawatch Range from at (100 %) or near (∼83 %) Last Glacial Maximum extents initiated between 16.0 and 15.6 ka and was complete by 14.2–13.7 ka at rates ranging between 35.6 and 6.8 m a−1. Deglaciation in the Sawatch Range commenced ∼2–3 kyr later than the onset of rising global CO2 and prior to rising temperatures observed in the North Atlantic region at the Heinrich Stadial 1–Bølling transition. However, deglaciation in the Sawatch Range approximately aligns with the timing of Great Basin pluvial lake lowering. Recent data–modeling comparison efforts highlight the influence of the large North American ice sheets on climate in the western United States, and we hypothesize that recession of the North American ice sheets may have influenced the timing and rate of deglaciation in the Sawatch Range. While we cannot definitively argue for exclusively North Atlantic forcing or North American ice sheet forcing, our data demonstrate the importance of regional forcing mechanisms for past climate records. Article in Journal/Newspaper Ice Sheet North Atlantic Niedersächsisches Online-Archiv NOA Geochronology 2 2 245 255 |
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article Verlagsveröffentlichung Tulenko, Joseph P. Caffee, William Schweinsberg, Avriel D. Briner, Jason P. Leonard, Eric M. Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA |
topic_facet |
article Verlagsveröffentlichung |
description |
We quantify retreat rates for three alpine glaciers in the Sawatch Range of the southern Rocky Mountains following the Last Glacial Maximum using 10Be ages from ice-sculpted, valley-floor bedrock transects and statistical analysis via the BACON program in R. Glacier retreat in the Sawatch Range from at (100 %) or near (∼83 %) Last Glacial Maximum extents initiated between 16.0 and 15.6 ka and was complete by 14.2–13.7 ka at rates ranging between 35.6 and 6.8 m a−1. Deglaciation in the Sawatch Range commenced ∼2–3 kyr later than the onset of rising global CO2 and prior to rising temperatures observed in the North Atlantic region at the Heinrich Stadial 1–Bølling transition. However, deglaciation in the Sawatch Range approximately aligns with the timing of Great Basin pluvial lake lowering. Recent data–modeling comparison efforts highlight the influence of the large North American ice sheets on climate in the western United States, and we hypothesize that recession of the North American ice sheets may have influenced the timing and rate of deglaciation in the Sawatch Range. While we cannot definitively argue for exclusively North Atlantic forcing or North American ice sheet forcing, our data demonstrate the importance of regional forcing mechanisms for past climate records. |
format |
Article in Journal/Newspaper |
author |
Tulenko, Joseph P. Caffee, William Schweinsberg, Avriel D. Briner, Jason P. Leonard, Eric M. |
author_facet |
Tulenko, Joseph P. Caffee, William Schweinsberg, Avriel D. Briner, Jason P. Leonard, Eric M. |
author_sort |
Tulenko, Joseph P. |
title |
Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA |
title_short |
Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA |
title_full |
Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA |
title_fullStr |
Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA |
title_full_unstemmed |
Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA |
title_sort |
delayed and rapid deglaciation of alpine valleys in the sawatch range, southern rocky mountains, usa |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/gchron-2-245-2020 https://noa.gwlb.de/receive/cop_mods_00053061 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00052714/gchron-2-245-2020.pdf https://gchron.copernicus.org/articles/2/245/2020/gchron-2-245-2020.pdf |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_relation |
Geochronology -- https://www.geochronology.net/ -- 2628-3719 https://doi.org/10.5194/gchron-2-245-2020 https://noa.gwlb.de/receive/cop_mods_00053061 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00052714/gchron-2-245-2020.pdf https://gchron.copernicus.org/articles/2/245/2020/gchron-2-245-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/gchron-2-245-2020 |
container_title |
Geochronology |
container_volume |
2 |
container_issue |
2 |
container_start_page |
245 |
op_container_end_page |
255 |
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1766031514478313472 |