Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard
The hydrology and biogeochemistry of perennial groundwater springs emerging in the forefields of retreating Svalbard glaciers are considered through a single-site, multi-year study at Foxfonna, and a multi-site spatial sampling programme during consecutive winter seasons. We show that such springs a...
Published in: | Journal of Hydrology |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2023
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/3101890 https://doi.org/10.1016/j.jhydrol.2023.129894 |
id |
fthsvestlandet:oai:hvlopen.brage.unit.no:11250/3101890 |
---|---|
record_format |
openpolar |
spelling |
fthsvestlandet:oai:hvlopen.brage.unit.no:11250/3101890 2024-03-03T08:42:10+00:00 Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard Hodson, Andrew Kleber, Gabrielle Emma Johnson, Jack Lonardi, Michael Petroselli, Chiara Dixon, Tim Bottrell, Simon 2023 application/pdf https://hdl.handle.net/11250/3101890 https://doi.org/10.1016/j.jhydrol.2023.129894 eng eng Elsevier Norges forskningsråd: 294764 Journal of Hydrology. 2023, 624 . urn:issn:0022-1694 https://hdl.handle.net/11250/3101890 https://doi.org/10.1016/j.jhydrol.2023.129894 cristin:2172433 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023 The Author(s) 11 624 Journal of Hydrology 129894 Peer reviewed Journal article 2023 fthsvestlandet https://doi.org/10.1016/j.jhydrol.2023.129894 2024-02-02T12:40:38Z The hydrology and biogeochemistry of perennial groundwater springs emerging in the forefields of retreating Svalbard glaciers are considered through a single-site, multi-year study at Foxfonna, and a multi-site spatial sampling programme during consecutive winter seasons. We show that such springs are commonplace in the forefields of retreating Svalbard glaciers, including even cold-based glaciers underlain by permafrost. The groundwaters all contain geogenic methane and are generally anoxic, but reveal a range of different redox environments linked to sulfide oxidation, denitrification and sulfate reduction. The principal source waters for these springs seems to be snow and firn meltwaters entering bergschrund crevasses at high elevation glacier margins. At Foxfonna, the glacier’s strongly negative mass balance and transition to cold-based thermal conditions have resulted in reduced groundwater discharge into the proglacial river due to lower rates of recharge (less dilution). Throughout these changes, sulfide oxidation coupled to Na-Silicate weathering has remained a dominant reaction, driving a three-fold increase in electrical conductivity since 2010. The period has also been characterised by the complete loss of NO3– since summer 2018, as well as short-lived changes in the Oxidation-Reduction Potential and methane concentration. Therefore, climate-driven glacial retreat influences both the quantity and quality of groundwaters entering downstream drainage systems, which exist in spite of cold-based glaciers and permafrost being prevalent in this part of the Arctic. publishedVersion Article in Journal/Newspaper Arctic glacier permafrost Svalbard Høgskulen på Vestlandet: HVL Open Arctic Svalbard Foxfonna ENVELOPE(16.200,16.200,78.133,78.133) Journal of Hydrology 624 129894 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
description |
The hydrology and biogeochemistry of perennial groundwater springs emerging in the forefields of retreating Svalbard glaciers are considered through a single-site, multi-year study at Foxfonna, and a multi-site spatial sampling programme during consecutive winter seasons. We show that such springs are commonplace in the forefields of retreating Svalbard glaciers, including even cold-based glaciers underlain by permafrost. The groundwaters all contain geogenic methane and are generally anoxic, but reveal a range of different redox environments linked to sulfide oxidation, denitrification and sulfate reduction. The principal source waters for these springs seems to be snow and firn meltwaters entering bergschrund crevasses at high elevation glacier margins. At Foxfonna, the glacier’s strongly negative mass balance and transition to cold-based thermal conditions have resulted in reduced groundwater discharge into the proglacial river due to lower rates of recharge (less dilution). Throughout these changes, sulfide oxidation coupled to Na-Silicate weathering has remained a dominant reaction, driving a three-fold increase in electrical conductivity since 2010. The period has also been characterised by the complete loss of NO3– since summer 2018, as well as short-lived changes in the Oxidation-Reduction Potential and methane concentration. Therefore, climate-driven glacial retreat influences both the quantity and quality of groundwaters entering downstream drainage systems, which exist in spite of cold-based glaciers and permafrost being prevalent in this part of the Arctic. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hodson, Andrew Kleber, Gabrielle Emma Johnson, Jack Lonardi, Michael Petroselli, Chiara Dixon, Tim Bottrell, Simon |
spellingShingle |
Hodson, Andrew Kleber, Gabrielle Emma Johnson, Jack Lonardi, Michael Petroselli, Chiara Dixon, Tim Bottrell, Simon Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard |
author_facet |
Hodson, Andrew Kleber, Gabrielle Emma Johnson, Jack Lonardi, Michael Petroselli, Chiara Dixon, Tim Bottrell, Simon |
author_sort |
Hodson, Andrew |
title |
Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard |
title_short |
Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard |
title_full |
Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard |
title_fullStr |
Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard |
title_full_unstemmed |
Effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in Central Svalbard |
title_sort |
effects of glacier retreat upon glacier-groundwater coupling and biogeochemistry in central svalbard |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3101890 https://doi.org/10.1016/j.jhydrol.2023.129894 |
long_lat |
ENVELOPE(16.200,16.200,78.133,78.133) |
geographic |
Arctic Svalbard Foxfonna |
geographic_facet |
Arctic Svalbard Foxfonna |
genre |
Arctic glacier permafrost Svalbard |
genre_facet |
Arctic glacier permafrost Svalbard |
op_source |
11 624 Journal of Hydrology 129894 |
op_relation |
Norges forskningsråd: 294764 Journal of Hydrology. 2023, 624 . urn:issn:0022-1694 https://hdl.handle.net/11250/3101890 https://doi.org/10.1016/j.jhydrol.2023.129894 cristin:2172433 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023 The Author(s) |
op_doi |
https://doi.org/10.1016/j.jhydrol.2023.129894 |
container_title |
Journal of Hydrology |
container_volume |
624 |
container_start_page |
129894 |
_version_ |
1792497640694349824 |