Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine
Abstract Climate change has had a significant impact on glacier recession, particularly in the Arctic, where glacier meltwater is an important contributor to global sea-level rise. Therefore, it is important to accurately quantify glacier recession within this sensitive region, using multiple observ...
Published in: | Journal of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/jog.2023.18 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000187 |
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crcambridgeupr:10.1017/jog.2023.18 2024-06-23T07:50:11+00:00 Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine Ali, Asim Dunlop, Paul Coleman, Sonya Kerr, Dermot McNabb, Robert W. Noormets, Riko Ulster University 2023 http://dx.doi.org/10.1017/jog.2023.18 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000187 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 277, page 1305-1316 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.18 2024-06-05T04:01:51Z Abstract Climate change has had a significant impact on glacier recession, particularly in the Arctic, where glacier meltwater is an important contributor to global sea-level rise. Therefore, it is important to accurately quantify glacier recession within this sensitive region, using multiple observations of glacier extent. In this study, we mapped 480 glaciers in Novaya Zemlya, Russian Arctic, using object-based image analysis applied to multispectral Landsat satellite imagery in Google Earth Engine and quantify the area changes between 1986–89 and 2019–21. The results show that in 1986–89, the total glacierized area was 22 990 ± 301 km 2 , in 2000–01 the area was 22 525 ± 308 km 2 and by 2019–21 the glacier area reduced to 21 670 ± 292 km 2 , representing a total of 5.8% reduction in glacier area between 1986–89 and 2019–21. Higher glacier area loss was observed on the Barents Sea coast (7.3%) compared to the Kara (4.2%), reflecting previously observed differences in warming trends. The accuracy of the automatically generated outlines of each layer (1986–89, 2000–01 and 2019–21) was evaluated by comparing with manually corrected outlines (reference data) using random sampling, resulting in an overall accuracy estimate of between 96 and 97% compared to the reference data. This automated approach in Google Earth Engine is a promising tool for rapidly mapping glacier change that reduces the amount of time required to generate accurate glacier outlines. Article in Journal/Newspaper Arctic Barents Sea Climate change Journal of Glaciology Novaya Zemlya Cambridge University Press Arctic Barents Sea Journal of Glaciology 69 277 1305 1316 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Climate change has had a significant impact on glacier recession, particularly in the Arctic, where glacier meltwater is an important contributor to global sea-level rise. Therefore, it is important to accurately quantify glacier recession within this sensitive region, using multiple observations of glacier extent. In this study, we mapped 480 glaciers in Novaya Zemlya, Russian Arctic, using object-based image analysis applied to multispectral Landsat satellite imagery in Google Earth Engine and quantify the area changes between 1986–89 and 2019–21. The results show that in 1986–89, the total glacierized area was 22 990 ± 301 km 2 , in 2000–01 the area was 22 525 ± 308 km 2 and by 2019–21 the glacier area reduced to 21 670 ± 292 km 2 , representing a total of 5.8% reduction in glacier area between 1986–89 and 2019–21. Higher glacier area loss was observed on the Barents Sea coast (7.3%) compared to the Kara (4.2%), reflecting previously observed differences in warming trends. The accuracy of the automatically generated outlines of each layer (1986–89, 2000–01 and 2019–21) was evaluated by comparing with manually corrected outlines (reference data) using random sampling, resulting in an overall accuracy estimate of between 96 and 97% compared to the reference data. This automated approach in Google Earth Engine is a promising tool for rapidly mapping glacier change that reduces the amount of time required to generate accurate glacier outlines. |
author2 |
Ulster University |
format |
Article in Journal/Newspaper |
author |
Ali, Asim Dunlop, Paul Coleman, Sonya Kerr, Dermot McNabb, Robert W. Noormets, Riko |
spellingShingle |
Ali, Asim Dunlop, Paul Coleman, Sonya Kerr, Dermot McNabb, Robert W. Noormets, Riko Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine |
author_facet |
Ali, Asim Dunlop, Paul Coleman, Sonya Kerr, Dermot McNabb, Robert W. Noormets, Riko |
author_sort |
Ali, Asim |
title |
Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine |
title_short |
Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine |
title_full |
Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine |
title_fullStr |
Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine |
title_full_unstemmed |
Glacier area changes in Novaya Zemlya from 1986–89 to 2019–21 using object-based image analysis in Google Earth Engine |
title_sort |
glacier area changes in novaya zemlya from 1986–89 to 2019–21 using object-based image analysis in google earth engine |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.18 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000187 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Climate change Journal of Glaciology Novaya Zemlya |
genre_facet |
Arctic Barents Sea Climate change Journal of Glaciology Novaya Zemlya |
op_source |
Journal of Glaciology volume 69, issue 277, page 1305-1316 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.18 |
container_title |
Journal of Glaciology |
container_volume |
69 |
container_issue |
277 |
container_start_page |
1305 |
op_container_end_page |
1316 |
_version_ |
1802641055083921408 |