Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery
The Antarctic Peninsula and the adjacent South Shetland Islands show a significant atmospheric warming trend. Increase in air temperature is commonly associated with glacier melting. However, there is a dearth of documentation about the glaciers of Greenwich Island. This study fills a knowledge gap...
Published in: | Polar Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16016 http://id.nii.ac.jp/1291/00015904/ |
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ftnipr:oai:nipr.repo.nii.ac.jp:00016016 2023-05-15T13:49:00+02:00 Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery 2020-06 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16016 http://id.nii.ac.jp/1291/00015904/ en eng https://doi.org/10.1016/j.polar.2020.100526 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16016 http://id.nii.ac.jp/1291/00015904/ Polar Science, 24, 100526(2020-06) 18739652 Glacier Antarctica Remote sensing Greenwich island Journal Article 2020 ftnipr https://doi.org/10.1016/j.polar.2020.100526 2022-12-03T19:43:16Z The Antarctic Peninsula and the adjacent South Shetland Islands show a significant atmospheric warming trend. Increase in air temperature is commonly associated with glacier melting. However, there is a dearth of documentation about the glaciers of Greenwich Island. This study fills a knowledge gap about glacier melting on Greenwich Island by focusing on four glaciers located on the northern part of it. We also update the temperature trends and analyze the relationship between glaciers melting and temperature changes. We used airborne, optical and SAR satellite sensors along with in-situ measurements over the 1956–2019 period to map glaciers extent changes. The total ice cover of these glaciers decreased from 10.01 km2 in 1956 to 7.97 km2 in 2019, i.e. 20.4%. The results suggest a glacier loss rate of 32359 m2/year (−0.32%/year). This rate of loss is coherent with other measurements made in the South Shetland Islands. We also update the air temperature rising trend in this area to +0.23 °C/decade between 1966 and 2018 at Chile's Arturo Prat base. We do however find two significant trends over the last sixty years: +0.36 °C per decade between 1966 and 1998 and a sharp decrease between 1998 and 2015 of −0.6 °C per decade. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island Polar Science Polar Science South Shetland Islands National Institute of Polar Research Repository, Japan Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Greenwich Prat ENVELOPE(-59.467,-59.467,-62.467,-62.467) Greenwich Island ENVELOPE(-59.783,-59.783,-62.517,-62.517) Polar Science 24 100526 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Glacier Antarctica Remote sensing Greenwich island |
spellingShingle |
Glacier Antarctica Remote sensing Greenwich island Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery |
topic_facet |
Glacier Antarctica Remote sensing Greenwich island |
description |
The Antarctic Peninsula and the adjacent South Shetland Islands show a significant atmospheric warming trend. Increase in air temperature is commonly associated with glacier melting. However, there is a dearth of documentation about the glaciers of Greenwich Island. This study fills a knowledge gap about glacier melting on Greenwich Island by focusing on four glaciers located on the northern part of it. We also update the temperature trends and analyze the relationship between glaciers melting and temperature changes. We used airborne, optical and SAR satellite sensors along with in-situ measurements over the 1956–2019 period to map glaciers extent changes. The total ice cover of these glaciers decreased from 10.01 km2 in 1956 to 7.97 km2 in 2019, i.e. 20.4%. The results suggest a glacier loss rate of 32359 m2/year (−0.32%/year). This rate of loss is coherent with other measurements made in the South Shetland Islands. We also update the air temperature rising trend in this area to +0.23 °C/decade between 1966 and 2018 at Chile's Arturo Prat base. We do however find two significant trends over the last sixty years: +0.36 °C per decade between 1966 and 1998 and a sharp decrease between 1998 and 2015 of −0.6 °C per decade. |
format |
Article in Journal/Newspaper |
title |
Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery |
title_short |
Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery |
title_full |
Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery |
title_fullStr |
Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery |
title_full_unstemmed |
Estimating ice retreat on Greenwich island – Antarctica between 1956 and 2019 using optical and SAR imagery |
title_sort |
estimating ice retreat on greenwich island – antarctica between 1956 and 2019 using optical and sar imagery |
publishDate |
2020 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16016 http://id.nii.ac.jp/1291/00015904/ |
long_lat |
ENVELOPE(-59.467,-59.467,-62.467,-62.467) ENVELOPE(-59.783,-59.783,-62.517,-62.517) |
geographic |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Greenwich Prat Greenwich Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Greenwich Prat Greenwich Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island Polar Science Polar Science South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Greenwich Island Polar Science Polar Science South Shetland Islands |
op_relation |
https://doi.org/10.1016/j.polar.2020.100526 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16016 http://id.nii.ac.jp/1291/00015904/ Polar Science, 24, 100526(2020-06) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2020.100526 |
container_title |
Polar Science |
container_volume |
24 |
container_start_page |
100526 |
_version_ |
1766250389820145664 |