Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland
Over recent decades, the number of outlet glaciers terminating in lakes in Iceland has increased in line with climate warming. The mass-balance changes of these lake-terminating outlet glaciers are sensitive to rising air temperatures, due to altered glacier dynamics and increased surface melt. This...
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Cambridge University Press
2019
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ftdoajarticles:oai:doaj.org/article:d5850f3ea3ed4d7dbe75497182eabd5d 2023-05-15T16:21:35+02:00 Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland REBECCA DELL RACHEL CARR EMRYS PHILLIPS ANDREW J. RUSSELL 2019-04-01T00:00:00Z https://doi.org/10.1017/jog.2019.18 https://doaj.org/article/d5850f3ea3ed4d7dbe75497182eabd5d EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000182/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.18 0022-1430 1727-5652 https://doaj.org/article/d5850f3ea3ed4d7dbe75497182eabd5d Journal of Glaciology, Vol 65, Pp 321-336 (2019) glacier calving glacier delineation glacier flow ice velocity structural glaciology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1017/jog.2019.18 2023-03-12T01:30:59Z Over recent decades, the number of outlet glaciers terminating in lakes in Iceland has increased in line with climate warming. The mass-balance changes of these lake-terminating outlet glaciers are sensitive to rising air temperatures, due to altered glacier dynamics and increased surface melt. This study aims to better understand the relationship between proglacial lake development, climate, glacier dynamics and glacier structure at Fjallsjökull, a large, lake-terminating outlet glacier in south-east Iceland. We used satellite imagery to map glacier terminus position and lake extent between 1973 and 2016, and a combination of aerial and satellite imagery to map the structural architecture of the glacier's terminus in 1982, 1994 and 2011. The temporal evolution of ice surface velocities between 1990 and 2018 was calculated using feature tracking. Statistically significant increases in the rate of terminus retreat and lake expansion were identified in 2001, 2009 and 2011. Our surface velocity and structural datasets revealed the development of localised flow ‘corridors’ over time, which conveyed relatively faster flow towards the glacier's terminus. We attribute the overall changes in dynamics and structural architecture at Fjallsjökull to rising air temperatures, but argue that the spatial complexities are driven by glacier specific factors, such as basal topography. Article in Journal/Newspaper glacier Iceland Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 65 250 321 336 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacier calving glacier delineation glacier flow ice velocity structural glaciology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacier calving glacier delineation glacier flow ice velocity structural glaciology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 REBECCA DELL RACHEL CARR EMRYS PHILLIPS ANDREW J. RUSSELL Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland |
topic_facet |
glacier calving glacier delineation glacier flow ice velocity structural glaciology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Over recent decades, the number of outlet glaciers terminating in lakes in Iceland has increased in line with climate warming. The mass-balance changes of these lake-terminating outlet glaciers are sensitive to rising air temperatures, due to altered glacier dynamics and increased surface melt. This study aims to better understand the relationship between proglacial lake development, climate, glacier dynamics and glacier structure at Fjallsjökull, a large, lake-terminating outlet glacier in south-east Iceland. We used satellite imagery to map glacier terminus position and lake extent between 1973 and 2016, and a combination of aerial and satellite imagery to map the structural architecture of the glacier's terminus in 1982, 1994 and 2011. The temporal evolution of ice surface velocities between 1990 and 2018 was calculated using feature tracking. Statistically significant increases in the rate of terminus retreat and lake expansion were identified in 2001, 2009 and 2011. Our surface velocity and structural datasets revealed the development of localised flow ‘corridors’ over time, which conveyed relatively faster flow towards the glacier's terminus. We attribute the overall changes in dynamics and structural architecture at Fjallsjökull to rising air temperatures, but argue that the spatial complexities are driven by glacier specific factors, such as basal topography. |
format |
Article in Journal/Newspaper |
author |
REBECCA DELL RACHEL CARR EMRYS PHILLIPS ANDREW J. RUSSELL |
author_facet |
REBECCA DELL RACHEL CARR EMRYS PHILLIPS ANDREW J. RUSSELL |
author_sort |
REBECCA DELL |
title |
Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland |
title_short |
Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland |
title_full |
Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland |
title_fullStr |
Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland |
title_full_unstemmed |
Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland |
title_sort |
response of glacier flow and structure to proglacial lake development and climate at fjallsjökull, south-east iceland |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://doi.org/10.1017/jog.2019.18 https://doaj.org/article/d5850f3ea3ed4d7dbe75497182eabd5d |
genre |
glacier Iceland Journal of Glaciology |
genre_facet |
glacier Iceland Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 65, Pp 321-336 (2019) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000182/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.18 0022-1430 1727-5652 https://doaj.org/article/d5850f3ea3ed4d7dbe75497182eabd5d |
op_doi |
https://doi.org/10.1017/jog.2019.18 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
250 |
container_start_page |
321 |
op_container_end_page |
336 |
_version_ |
1766009587969818624 |