Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard)
Glacier naledi are extrusive ice masses that appear in front of glaciers as a consequence of refreezing of meltwater seepage during the accumulation season. These structures provide a unique opportunity to understand subglacial drainage activity during the accumulation season; however, only few deta...
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Cambridge University Press
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Online Access: | http://hdl.handle.net/11250/2431847 https://doi.org/10.1017/aog.2016.9 |
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fthsvestlandet:oai:hvlopen.brage.unit.no:11250/2431847 2024-03-03T08:36:45+00:00 Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) Stachnik, Lukasz Mariusz Yde, Jacob Clement Kondracka, Marta Ignatiuk, Dariusz Grzesik, Magdalena 2016 application/pdf http://hdl.handle.net/11250/2431847 https://doi.org/10.1017/aog.2016.9 eng eng Cambridge University Press Annals of glaciology, 57(72), 19-30 urn:issn:0260-3055 http://hdl.handle.net/11250/2431847 https://doi.org/10.1017/aog.2016.9 cristin:1397070 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no The authors. 19-30 57 Annals of glaciology 72 glacier chemistry glacier hydrochemistry ground-penetrating radar ice chemistry meltwater chemistry Journal article Peer reviewed 2016 fthsvestlandet https://doi.org/10.1017/aog.2016.9 2024-02-02T12:40:55Z Glacier naledi are extrusive ice masses that appear in front of glaciers as a consequence of refreezing of meltwater seepage during the accumulation season. These structures provide a unique opportunity to understand subglacial drainage activity during the accumulation season; however, only few detailed studies have previously focused on their characteristics. Here, we investigated glacier-derived naled assemblages in the proglacial zone of the polythermal glacier Werenskioldbreen (27.4 km2) in SW Svalbard. We determined the spatial distribution of naledi using ground penetrating radar surveys. The main subglacial drainage pattern was related to a channel under the medial moraine, and three sources are linked to a distributed subglacial drainage network. The relation between atmospherically-corrected (Ca2+ + Mg2+) and (SO42−) in sub-naled waters was closely related to sulphide oxidation coupled with carbonate dissolution (r = 0.99; slope = 1.6). This is consistent with the local lithology, which is dominated by schist containing carbonates. We also found high carbonate saturation indices in pale white ice layers within the naled. We conclude that sulphide oxidation coupled with carbonate dissolution is the dominant chemical weathering process in the subglacial drainage system of Werenskioldbreen during the accumulation season. Article in Journal/Newspaper Annals of Glaciology glacier Svalbard Høgskulen på Vestlandet: HVL Open Svalbard Werenskioldbreen ENVELOPE(15.336,15.336,77.077,77.077) Annals of Glaciology 57 72 19 30 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
topic |
glacier chemistry glacier hydrochemistry ground-penetrating radar ice chemistry meltwater chemistry |
spellingShingle |
glacier chemistry glacier hydrochemistry ground-penetrating radar ice chemistry meltwater chemistry Stachnik, Lukasz Mariusz Yde, Jacob Clement Kondracka, Marta Ignatiuk, Dariusz Grzesik, Magdalena Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) |
topic_facet |
glacier chemistry glacier hydrochemistry ground-penetrating radar ice chemistry meltwater chemistry |
description |
Glacier naledi are extrusive ice masses that appear in front of glaciers as a consequence of refreezing of meltwater seepage during the accumulation season. These structures provide a unique opportunity to understand subglacial drainage activity during the accumulation season; however, only few detailed studies have previously focused on their characteristics. Here, we investigated glacier-derived naled assemblages in the proglacial zone of the polythermal glacier Werenskioldbreen (27.4 km2) in SW Svalbard. We determined the spatial distribution of naledi using ground penetrating radar surveys. The main subglacial drainage pattern was related to a channel under the medial moraine, and three sources are linked to a distributed subglacial drainage network. The relation between atmospherically-corrected (Ca2+ + Mg2+) and (SO42−) in sub-naled waters was closely related to sulphide oxidation coupled with carbonate dissolution (r = 0.99; slope = 1.6). This is consistent with the local lithology, which is dominated by schist containing carbonates. We also found high carbonate saturation indices in pale white ice layers within the naled. We conclude that sulphide oxidation coupled with carbonate dissolution is the dominant chemical weathering process in the subglacial drainage system of Werenskioldbreen during the accumulation season. |
format |
Article in Journal/Newspaper |
author |
Stachnik, Lukasz Mariusz Yde, Jacob Clement Kondracka, Marta Ignatiuk, Dariusz Grzesik, Magdalena |
author_facet |
Stachnik, Lukasz Mariusz Yde, Jacob Clement Kondracka, Marta Ignatiuk, Dariusz Grzesik, Magdalena |
author_sort |
Stachnik, Lukasz Mariusz |
title |
Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) |
title_short |
Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) |
title_full |
Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) |
title_fullStr |
Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) |
title_full_unstemmed |
Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard) |
title_sort |
glacier naled evolution and relation to the subglacial drainage system based on water chemistry and gpr surveys (werenskioldbreen, sw svalbard) |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2431847 https://doi.org/10.1017/aog.2016.9 |
long_lat |
ENVELOPE(15.336,15.336,77.077,77.077) |
geographic |
Svalbard Werenskioldbreen |
geographic_facet |
Svalbard Werenskioldbreen |
genre |
Annals of Glaciology glacier Svalbard |
genre_facet |
Annals of Glaciology glacier Svalbard |
op_source |
19-30 57 Annals of glaciology 72 |
op_relation |
Annals of glaciology, 57(72), 19-30 urn:issn:0260-3055 http://hdl.handle.net/11250/2431847 https://doi.org/10.1017/aog.2016.9 cristin:1397070 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no The authors. |
op_doi |
https://doi.org/10.1017/aog.2016.9 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
72 |
container_start_page |
19 |
op_container_end_page |
30 |
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1792495628175015936 |