The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020
Many Arctic marine-terminating glaciers have undergone rapid retreats in recent decades. Seasonal and year-to-year variations in terminus position act on all tidewater glaciers, but the key controls on those changes vary from region to region. Here, we examined seasonal and decadal changes in termin...
Published in: | Journal of Geophysical Research: Earth Surface |
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Online Access: | https://hdl.handle.net/10037/29787 https://doi.org/10.1029/2022JF006911 |
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ftunivtroemsoe:oai:munin.uit.no:10037/29787 2023-08-27T04:08:07+02:00 The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 Błaszczyk, Małgorzata Moskalik, Mateusz Grabiec, Mariusz Jania, Jacek Walczowski, Waldemar Wawrzyniak, Tomasz Strzelewicz, Agnieszka Malnes, Eirik Lauknes, Tom Rune Pfeffer, W. Tad 2023-05-19 https://hdl.handle.net/10037/29787 https://doi.org/10.1029/2022JF006911 eng eng Wiley Journal of Geophysical Research (JGR): Earth Surface Norges forskningsråd: 269927 Błaszczyk, Moskalik, Grabiec, Jania, Walczowski, Wawrzyniak, Strzelewicz, Malnes, Lauknes, Pfeffer. The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020. Journal of Geophysical Research (JGR): Earth Surface. 2023;128(5) FRIDAID 2154447 doi:10.1029/2022JF006911 2169-9003 2169-9011 https://hdl.handle.net/10037/29787 embargoedAccess Copyright 2023 The Author(s) Journal article Tidsskriftartikkel publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1029/2022JF006911 2023-08-09T23:07:01Z Many Arctic marine-terminating glaciers have undergone rapid retreats in recent decades. Seasonal and year-to-year variations in terminus position act on all tidewater glaciers, but the key controls on those changes vary from region to region. Here, we examined seasonal and decadal changes in termini positions of seven tidewater glaciers in the inner part of Hornsund, the southernmost fjord of Spitsbergen (Svalbard Archipelago), based on a variety of data from 1992 to 2020. Combining satellite imagery, basic meteorological data (air temperature, positive degree day index (PDD), liquid precipitation), sea surface temperature (SST), mean temperature in the glacier forefield bays, fast sea ice cover, and bathymetry near the glacier front, we examined the influence of potential controlling parameters on interannual and seasonal variability of the glacier termini. We found regional synchrony between terminus advance/retreat and climate variables. At a regional scale, annual fluctuation changes are related to PDD and SST, while summer fluctuations are linked to PDD, although individual glaciers are shown to have differing sensitivities to potential climate drivers. We also found that the retreat period in Hornsund generally lasts from June to October-December. Onset of the retreat is related to sea and air temperature, and in some cases follows the disappearance of the ice cover. These results indicate that the expected increase in meltwater runoff in Svalbard, the input of relatively warm Atlantic water to the fjord, and the increasing trend of longer summer and warmer winter periods will have implications for glacier velocity and frontal ablation Article in Journal/Newspaper Arctic glacier Hornsund Sea ice Svalbard Tidewater Spitsbergen University of Tromsø: Munin Open Research Archive Arctic Hornsund ENVELOPE(15.865,15.865,76.979,76.979) Svalbard Svalbard Archipelago Journal of Geophysical Research: Earth Surface 128 5 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
Many Arctic marine-terminating glaciers have undergone rapid retreats in recent decades. Seasonal and year-to-year variations in terminus position act on all tidewater glaciers, but the key controls on those changes vary from region to region. Here, we examined seasonal and decadal changes in termini positions of seven tidewater glaciers in the inner part of Hornsund, the southernmost fjord of Spitsbergen (Svalbard Archipelago), based on a variety of data from 1992 to 2020. Combining satellite imagery, basic meteorological data (air temperature, positive degree day index (PDD), liquid precipitation), sea surface temperature (SST), mean temperature in the glacier forefield bays, fast sea ice cover, and bathymetry near the glacier front, we examined the influence of potential controlling parameters on interannual and seasonal variability of the glacier termini. We found regional synchrony between terminus advance/retreat and climate variables. At a regional scale, annual fluctuation changes are related to PDD and SST, while summer fluctuations are linked to PDD, although individual glaciers are shown to have differing sensitivities to potential climate drivers. We also found that the retreat period in Hornsund generally lasts from June to October-December. Onset of the retreat is related to sea and air temperature, and in some cases follows the disappearance of the ice cover. These results indicate that the expected increase in meltwater runoff in Svalbard, the input of relatively warm Atlantic water to the fjord, and the increasing trend of longer summer and warmer winter periods will have implications for glacier velocity and frontal ablation |
format |
Article in Journal/Newspaper |
author |
Błaszczyk, Małgorzata Moskalik, Mateusz Grabiec, Mariusz Jania, Jacek Walczowski, Waldemar Wawrzyniak, Tomasz Strzelewicz, Agnieszka Malnes, Eirik Lauknes, Tom Rune Pfeffer, W. Tad |
spellingShingle |
Błaszczyk, Małgorzata Moskalik, Mateusz Grabiec, Mariusz Jania, Jacek Walczowski, Waldemar Wawrzyniak, Tomasz Strzelewicz, Agnieszka Malnes, Eirik Lauknes, Tom Rune Pfeffer, W. Tad The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 |
author_facet |
Błaszczyk, Małgorzata Moskalik, Mateusz Grabiec, Mariusz Jania, Jacek Walczowski, Waldemar Wawrzyniak, Tomasz Strzelewicz, Agnieszka Malnes, Eirik Lauknes, Tom Rune Pfeffer, W. Tad |
author_sort |
Błaszczyk, Małgorzata |
title |
The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 |
title_short |
The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 |
title_full |
The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 |
title_fullStr |
The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 |
title_full_unstemmed |
The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020 |
title_sort |
response of tidewater glacier termini positions in hornsund (svalbard) to climate forcing, 1992–2020 |
publisher |
Wiley |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/29787 https://doi.org/10.1029/2022JF006911 |
long_lat |
ENVELOPE(15.865,15.865,76.979,76.979) |
geographic |
Arctic Hornsund Svalbard Svalbard Archipelago |
geographic_facet |
Arctic Hornsund Svalbard Svalbard Archipelago |
genre |
Arctic glacier Hornsund Sea ice Svalbard Tidewater Spitsbergen |
genre_facet |
Arctic glacier Hornsund Sea ice Svalbard Tidewater Spitsbergen |
op_relation |
Journal of Geophysical Research (JGR): Earth Surface Norges forskningsråd: 269927 Błaszczyk, Moskalik, Grabiec, Jania, Walczowski, Wawrzyniak, Strzelewicz, Malnes, Lauknes, Pfeffer. The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020. Journal of Geophysical Research (JGR): Earth Surface. 2023;128(5) FRIDAID 2154447 doi:10.1029/2022JF006911 2169-9003 2169-9011 https://hdl.handle.net/10037/29787 |
op_rights |
embargoedAccess Copyright 2023 The Author(s) |
op_doi |
https://doi.org/10.1029/2022JF006911 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
128 |
container_issue |
5 |
_version_ |
1775348816628678656 |