Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland
Arctic ice shelves have declined over the past several decades, one of many indications of a rapidly changing cryosphere. Here we use a collection of off-nadir Landsat 8 images, a 1978 digital orthophotograph and photogrammetrically derived DEM, satellite altimetry and other data to examine the caus...
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Cambridge University Press
2023
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Online Access: | https://doi.org/10.1017/jog.2022.44 https://doaj.org/article/94aab07f77d04a4e936582a734b99733 |
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ftdoajarticles:oai:doaj.org/article:94aab07f77d04a4e936582a734b99733 2023-05-15T14:52:28+02:00 Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland Naomi Ochwat Ted Scambos Mark Fahnestock Sharon Stammerjohn 2023-02-01T00:00:00Z https://doi.org/10.1017/jog.2022.44 https://doaj.org/article/94aab07f77d04a4e936582a734b99733 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000442/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.44 0022-1430 1727-5652 https://doaj.org/article/94aab07f77d04a4e936582a734b99733 Journal of Glaciology, Vol 69, Pp 57-70 (2023) Arctic glaciology calving ice shelves ice-shelf break-up remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.44 2023-03-12T01:30:54Z Arctic ice shelves have declined over the past several decades, one of many indications of a rapidly changing cryosphere. Here we use a collection of off-nadir Landsat 8 images, a 1978 digital orthophotograph and photogrammetrically derived DEM, satellite altimetry and other data to examine the causes of an Arctic ice-shelf retreat in northernmost Greenland, the Hunt Fjord Ice Shelf (HFIS). HFIS has several distinct provenance regions comprised of glacier-derived ice and corrugated multi-decadal fast ice, with varying ice thicknesses (5–64 m). Available imagery shows little change in HFIS between 1978 and 2012, after which several midsummer calving events occurred (2012, 2016 and 2019) that reduced the HFIS by 42.5 km2 (~56%). Shelf area losses began as the number of surface melt days on the adjacent ice sheet more than doubled relative to the 1980s. Recent calving events also occurred during open-water periods at the ice-shelf front. Prior to mid-2012, there were no calving events during similar open-water periods. HFIS tributary glaciers have thinned by 3–20 m near their grounding zones, and may have accelerated since the 1980s, likely due to increased basal melting from contact with warm Atlantic Water. Article in Journal/Newspaper Arctic glacier Greenland Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Arctic Greenland Hunt Fjord ENVELOPE(-38.000,-38.000,83.417,83.417) Journal of Glaciology 69 273 57 70 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciology calving ice shelves ice-shelf break-up remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Arctic glaciology calving ice shelves ice-shelf break-up remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Naomi Ochwat Ted Scambos Mark Fahnestock Sharon Stammerjohn Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland |
topic_facet |
Arctic glaciology calving ice shelves ice-shelf break-up remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Arctic ice shelves have declined over the past several decades, one of many indications of a rapidly changing cryosphere. Here we use a collection of off-nadir Landsat 8 images, a 1978 digital orthophotograph and photogrammetrically derived DEM, satellite altimetry and other data to examine the causes of an Arctic ice-shelf retreat in northernmost Greenland, the Hunt Fjord Ice Shelf (HFIS). HFIS has several distinct provenance regions comprised of glacier-derived ice and corrugated multi-decadal fast ice, with varying ice thicknesses (5–64 m). Available imagery shows little change in HFIS between 1978 and 2012, after which several midsummer calving events occurred (2012, 2016 and 2019) that reduced the HFIS by 42.5 km2 (~56%). Shelf area losses began as the number of surface melt days on the adjacent ice sheet more than doubled relative to the 1980s. Recent calving events also occurred during open-water periods at the ice-shelf front. Prior to mid-2012, there were no calving events during similar open-water periods. HFIS tributary glaciers have thinned by 3–20 m near their grounding zones, and may have accelerated since the 1980s, likely due to increased basal melting from contact with warm Atlantic Water. |
format |
Article in Journal/Newspaper |
author |
Naomi Ochwat Ted Scambos Mark Fahnestock Sharon Stammerjohn |
author_facet |
Naomi Ochwat Ted Scambos Mark Fahnestock Sharon Stammerjohn |
author_sort |
Naomi Ochwat |
title |
Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland |
title_short |
Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland |
title_full |
Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland |
title_fullStr |
Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland |
title_full_unstemmed |
Characteristics, recent evolution, and ongoing retreat of Hunt Fjord Ice Shelf, northern Greenland |
title_sort |
characteristics, recent evolution, and ongoing retreat of hunt fjord ice shelf, northern greenland |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
https://doi.org/10.1017/jog.2022.44 https://doaj.org/article/94aab07f77d04a4e936582a734b99733 |
long_lat |
ENVELOPE(-38.000,-38.000,83.417,83.417) |
geographic |
Arctic Greenland Hunt Fjord |
geographic_facet |
Arctic Greenland Hunt Fjord |
genre |
Arctic glacier Greenland Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology |
genre_facet |
Arctic glacier Greenland Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 57-70 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000442/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.44 0022-1430 1727-5652 https://doaj.org/article/94aab07f77d04a4e936582a734b99733 |
op_doi |
https://doi.org/10.1017/jog.2022.44 |
container_title |
Journal of Glaciology |
container_volume |
69 |
container_issue |
273 |
container_start_page |
57 |
op_container_end_page |
70 |
_version_ |
1766323704548032512 |