Understanding drivers of glacier-length variability over the last millennium
Changes in glacier length reflect the integrated response to local fluctuations in temperature and precipitation resulting from both external forcing (e.g., volcanic eruptions or anthropogenic CO2) and internal climate variability. In order to interpret the climate history reflected in the glacier m...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00056127 2023-05-15T18:32:32+02:00 Understanding drivers of glacier-length variability over the last millennium Huston, Alan Siler, Nicholas Roe, Gerard H. Pettit, Erin Steiger, Nathan J. 2021-04 electronic https://doi.org/10.5194/tc-15-1645-2021 https://noa.gwlb.de/receive/cop_mods_00056127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055778/tc-15-1645-2021.pdf https://tc.copernicus.org/articles/15/1645/2021/tc-15-1645-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-1645-2021 https://noa.gwlb.de/receive/cop_mods_00056127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055778/tc-15-1645-2021.pdf https://tc.copernicus.org/articles/15/1645/2021/tc-15-1645-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-1645-2021 2022-02-08T22:34:11Z Changes in glacier length reflect the integrated response to local fluctuations in temperature and precipitation resulting from both external forcing (e.g., volcanic eruptions or anthropogenic CO2) and internal climate variability. In order to interpret the climate history reflected in the glacier moraine record, the influence of both sources of climate variability must therefore be considered. Here we study the last millennium of glacier-length variability across the globe using a simple dynamic glacier model, which we force with temperature and precipitation time series from a 13-member ensemble of simulations from a global climate model. The ensemble allows us to quantify the contributions to glacier-length variability from external forcing (given by the ensemble mean) and internal variability (given by the ensemble spread). Within this framework, we find that internal variability is the predominant source of length fluctuations for glaciers with a shorter response time (less than a few decades). However, for glaciers with longer response timescales (more than a few decades) external forcing has a greater influence than internal variability. We further find that external forcing also dominates when the response of glaciers from widely separated regions is averaged. Single-forcing simulations indicate that, for this climate model, most of the forced response over the last millennium, pre-anthropogenic warming, has been driven by global-scale temperature change associated with volcanic aerosols. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 15 3 1645 1662 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Huston, Alan Siler, Nicholas Roe, Gerard H. Pettit, Erin Steiger, Nathan J. Understanding drivers of glacier-length variability over the last millennium |
topic_facet |
article Verlagsveröffentlichung |
description |
Changes in glacier length reflect the integrated response to local fluctuations in temperature and precipitation resulting from both external forcing (e.g., volcanic eruptions or anthropogenic CO2) and internal climate variability. In order to interpret the climate history reflected in the glacier moraine record, the influence of both sources of climate variability must therefore be considered. Here we study the last millennium of glacier-length variability across the globe using a simple dynamic glacier model, which we force with temperature and precipitation time series from a 13-member ensemble of simulations from a global climate model. The ensemble allows us to quantify the contributions to glacier-length variability from external forcing (given by the ensemble mean) and internal variability (given by the ensemble spread). Within this framework, we find that internal variability is the predominant source of length fluctuations for glaciers with a shorter response time (less than a few decades). However, for glaciers with longer response timescales (more than a few decades) external forcing has a greater influence than internal variability. We further find that external forcing also dominates when the response of glaciers from widely separated regions is averaged. Single-forcing simulations indicate that, for this climate model, most of the forced response over the last millennium, pre-anthropogenic warming, has been driven by global-scale temperature change associated with volcanic aerosols. |
format |
Article in Journal/Newspaper |
author |
Huston, Alan Siler, Nicholas Roe, Gerard H. Pettit, Erin Steiger, Nathan J. |
author_facet |
Huston, Alan Siler, Nicholas Roe, Gerard H. Pettit, Erin Steiger, Nathan J. |
author_sort |
Huston, Alan |
title |
Understanding drivers of glacier-length variability over the last millennium |
title_short |
Understanding drivers of glacier-length variability over the last millennium |
title_full |
Understanding drivers of glacier-length variability over the last millennium |
title_fullStr |
Understanding drivers of glacier-length variability over the last millennium |
title_full_unstemmed |
Understanding drivers of glacier-length variability over the last millennium |
title_sort |
understanding drivers of glacier-length variability over the last millennium |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-1645-2021 https://noa.gwlb.de/receive/cop_mods_00056127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055778/tc-15-1645-2021.pdf https://tc.copernicus.org/articles/15/1645/2021/tc-15-1645-2021.pdf |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-1645-2021 https://noa.gwlb.de/receive/cop_mods_00056127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055778/tc-15-1645-2021.pdf https://tc.copernicus.org/articles/15/1645/2021/tc-15-1645-2021.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/tc-15-1645-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
3 |
container_start_page |
1645 |
op_container_end_page |
1662 |
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1766216685106233344 |