Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance
Mountain glacier mass balance is affected by factors other than climate, such as topography, slope, and aspect. In midlatitude high-mountain regions, the north–south aspect contrast can cause significant changes in insolation and melt, resulting in local asynchrony in glacial dynamics. This study do...
Published in: | The Cryosphere |
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00067211 2023-07-16T04:01:07+02:00 Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance Khandsuren, Purevmaa Seong, Yeong Bae Rhee, Hyun Hee Lee, Cho-Hee Sarikaya, Mehmet Akif Oh, Jeong-Sik Sandag, Khadbaatar Yu, Byung Yong 2023-06 electronic https://doi.org/10.5194/tc-17-2409-2023 https://noa.gwlb.de/receive/cop_mods_00067211 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065676/tc-17-2409-2023.pdf https://tc.copernicus.org/articles/17/2409/2023/tc-17-2409-2023.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-17-2409-2023 https://noa.gwlb.de/receive/cop_mods_00067211 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065676/tc-17-2409-2023.pdf https://tc.copernicus.org/articles/17/2409/2023/tc-17-2409-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-2409-2023 2023-06-25T23:18:51Z Mountain glacier mass balance is affected by factors other than climate, such as topography, slope, and aspect. In midlatitude high-mountain regions, the north–south aspect contrast can cause significant changes in insolation and melt, resulting in local asynchrony in glacial dynamics. This study documents the asynchronous response of two paleoglaciers in southwestern Mongolia to the local topoclimatic factors using 10Be exposure age dating and 2D ice surface modeling. 10Be surface exposure age dating revealed that the Ikh Artsan south-facing valley glacier culminated (MIA1) at 20.1 ± 0.7 ka, coinciding with the global Last Glacial Maximum (gLGM). In contrast, the north-facing Jargalant paleoglacier (MJ1) culminated at 17.2 ± 1.5 ka, around Heinrich Stadial 1 and during the post-gLGM Northern Hemisphere warming. Our temperature-index melt model predicts that ablation will be substantially lower on the north-facing slope, as it is exposed to less solar radiation and cooler temperatures than the south-facing slope. The 2D ice surface modeling also revealed that the south-facing Ikh Artsan Glacier abruptly retreated from its maximum extent at 20 ka, but the Jargalant Glacier on the shaded slope consistently advanced and thickened due to reduced melt until 17 ka. The timing of the modeled glacier culmination is consistent within ± 1σ of the 10Be exposure age results. Extremely old ages ranging from 636.2 to 35.9 ka were measured for the inner moraines in the Jargalant cirque (MJ2–MJ4), suggesting a problem with inheritance from boulders eroded from the summit plateau. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 17 6 2409 2435 |
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article Verlagsveröffentlichung Khandsuren, Purevmaa Seong, Yeong Bae Rhee, Hyun Hee Lee, Cho-Hee Sarikaya, Mehmet Akif Oh, Jeong-Sik Sandag, Khadbaatar Yu, Byung Yong Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance |
topic_facet |
article Verlagsveröffentlichung |
description |
Mountain glacier mass balance is affected by factors other than climate, such as topography, slope, and aspect. In midlatitude high-mountain regions, the north–south aspect contrast can cause significant changes in insolation and melt, resulting in local asynchrony in glacial dynamics. This study documents the asynchronous response of two paleoglaciers in southwestern Mongolia to the local topoclimatic factors using 10Be exposure age dating and 2D ice surface modeling. 10Be surface exposure age dating revealed that the Ikh Artsan south-facing valley glacier culminated (MIA1) at 20.1 ± 0.7 ka, coinciding with the global Last Glacial Maximum (gLGM). In contrast, the north-facing Jargalant paleoglacier (MJ1) culminated at 17.2 ± 1.5 ka, around Heinrich Stadial 1 and during the post-gLGM Northern Hemisphere warming. Our temperature-index melt model predicts that ablation will be substantially lower on the north-facing slope, as it is exposed to less solar radiation and cooler temperatures than the south-facing slope. The 2D ice surface modeling also revealed that the south-facing Ikh Artsan Glacier abruptly retreated from its maximum extent at 20 ka, but the Jargalant Glacier on the shaded slope consistently advanced and thickened due to reduced melt until 17 ka. The timing of the modeled glacier culmination is consistent within ± 1σ of the 10Be exposure age results. Extremely old ages ranging from 636.2 to 35.9 ka were measured for the inner moraines in the Jargalant cirque (MJ2–MJ4), suggesting a problem with inheritance from boulders eroded from the summit plateau. |
format |
Article in Journal/Newspaper |
author |
Khandsuren, Purevmaa Seong, Yeong Bae Rhee, Hyun Hee Lee, Cho-Hee Sarikaya, Mehmet Akif Oh, Jeong-Sik Sandag, Khadbaatar Yu, Byung Yong |
author_facet |
Khandsuren, Purevmaa Seong, Yeong Bae Rhee, Hyun Hee Lee, Cho-Hee Sarikaya, Mehmet Akif Oh, Jeong-Sik Sandag, Khadbaatar Yu, Byung Yong |
author_sort |
Khandsuren, Purevmaa |
title |
Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance |
title_short |
Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance |
title_full |
Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance |
title_fullStr |
Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance |
title_full_unstemmed |
Asynchronous glacial dynamics of Last Glacial Maximum mountain glaciers in the Ikh Bogd Massif, Gobi Altai mountain range, southwestern Mongolia: aspect control on glacier mass balance |
title_sort |
asynchronous glacial dynamics of last glacial maximum mountain glaciers in the ikh bogd massif, gobi altai mountain range, southwestern mongolia: aspect control on glacier mass balance |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-2409-2023 https://noa.gwlb.de/receive/cop_mods_00067211 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065676/tc-17-2409-2023.pdf https://tc.copernicus.org/articles/17/2409/2023/tc-17-2409-2023.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-17-2409-2023 https://noa.gwlb.de/receive/cop_mods_00067211 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065676/tc-17-2409-2023.pdf https://tc.copernicus.org/articles/17/2409/2023/tc-17-2409-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-2409-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
6 |
container_start_page |
2409 |
op_container_end_page |
2435 |
_version_ |
1771550630645596160 |