Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery
Change of supraglacial lakes (SGLs) is an important hydrological activity on the Greenland ice sheet (GrIS), and storage and drainage of SGLs occur throughout the year. However, current studies tend to split SGL changes into melt/non-melt seasons, ignoring the effect of buried lakes in the explorati...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/536523/ https://nora.nerc.ac.uk/id/eprint/536523/1/N536523JA.pdf https://doi.org/10.3390/rs15245726 |
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ftnerc:oai:nora.nerc.ac.uk:536523 2024-01-21T10:06:24+01:00 Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery Zhu, Dongyu Zhou, Chunxia Zhu, Yikai Wang, Tao Zhang, Ce 2023-12-14 text http://nora.nerc.ac.uk/id/eprint/536523/ https://nora.nerc.ac.uk/id/eprint/536523/1/N536523JA.pdf https://doi.org/10.3390/rs15245726 en eng MDPI https://nora.nerc.ac.uk/id/eprint/536523/1/N536523JA.pdf Zhu, Dongyu; Zhou, Chunxia; Zhu, Yikai; Wang, Tao; Zhang, Ce orcid:0000-0001-5100-3584 . 2023 Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery [in special issue: Remote sensing of cryosphere and related processes] Remote Sensing, 15 (24), 5726. 16, pp. https://doi.org/10.3390/rs15245726 <https://doi.org/10.3390/rs15245726> cc_by_4 Earth Sciences Electronics Engineering and Technology Glaciology Publication - Article PeerReviewed 2023 ftnerc https://doi.org/10.3390/rs15245726 2023-12-22T00:03:11Z Change of supraglacial lakes (SGLs) is an important hydrological activity on the Greenland ice sheet (GrIS), and storage and drainage of SGLs occur throughout the year. However, current studies tend to split SGL changes into melt/non-melt seasons, ignoring the effect of buried lakes in the exploration of drainage, and the existing threshold-based approach to SGL extraction in a synthetic aperture radar (SAR) is influenced by the choice of the study area mask. In this study, a new method (Otsu–Canny–Otsu (OCO)), which accesses the features of SGLs on optical and SAR images objectively, is proposed for full-year SGL extraction with Google Earth Engine (GEE). The SGLs on the Petermann Glacier were monitored well by OCO throughout 2021, including buried lakes and more detailed rapid drainage events. Some SGLs’ extent varied minimally in a year (area varying by 10–25%) while some had very rapid drainage (a rapid drainage event from July 26 to 30). The SGL extraction results were influenced by factors such as the mode of polarization, the surface environment, and the depth of the lake. The OCO method can provide a more comprehensive analysis for SGL changes throughout the year. Article in Journal/Newspaper glacier Greenland Ice Sheet Petermann glacier Natural Environment Research Council: NERC Open Research Archive Greenland Remote Sensing 15 24 5726 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Earth Sciences Electronics Engineering and Technology Glaciology |
spellingShingle |
Earth Sciences Electronics Engineering and Technology Glaciology Zhu, Dongyu Zhou, Chunxia Zhu, Yikai Wang, Tao Zhang, Ce Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
topic_facet |
Earth Sciences Electronics Engineering and Technology Glaciology |
description |
Change of supraglacial lakes (SGLs) is an important hydrological activity on the Greenland ice sheet (GrIS), and storage and drainage of SGLs occur throughout the year. However, current studies tend to split SGL changes into melt/non-melt seasons, ignoring the effect of buried lakes in the exploration of drainage, and the existing threshold-based approach to SGL extraction in a synthetic aperture radar (SAR) is influenced by the choice of the study area mask. In this study, a new method (Otsu–Canny–Otsu (OCO)), which accesses the features of SGLs on optical and SAR images objectively, is proposed for full-year SGL extraction with Google Earth Engine (GEE). The SGLs on the Petermann Glacier were monitored well by OCO throughout 2021, including buried lakes and more detailed rapid drainage events. Some SGLs’ extent varied minimally in a year (area varying by 10–25%) while some had very rapid drainage (a rapid drainage event from July 26 to 30). The SGL extraction results were influenced by factors such as the mode of polarization, the surface environment, and the depth of the lake. The OCO method can provide a more comprehensive analysis for SGL changes throughout the year. |
format |
Article in Journal/Newspaper |
author |
Zhu, Dongyu Zhou, Chunxia Zhu, Yikai Wang, Tao Zhang, Ce |
author_facet |
Zhu, Dongyu Zhou, Chunxia Zhu, Yikai Wang, Tao Zhang, Ce |
author_sort |
Zhu, Dongyu |
title |
Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
title_short |
Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
title_full |
Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
title_fullStr |
Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
title_full_unstemmed |
Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
title_sort |
monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery |
publisher |
MDPI |
publishDate |
2023 |
url |
http://nora.nerc.ac.uk/id/eprint/536523/ https://nora.nerc.ac.uk/id/eprint/536523/1/N536523JA.pdf https://doi.org/10.3390/rs15245726 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet Petermann glacier |
genre_facet |
glacier Greenland Ice Sheet Petermann glacier |
op_relation |
https://nora.nerc.ac.uk/id/eprint/536523/1/N536523JA.pdf Zhu, Dongyu; Zhou, Chunxia; Zhu, Yikai; Wang, Tao; Zhang, Ce orcid:0000-0001-5100-3584 . 2023 Monitoring of supraglacial lake distribution and full-year changes using multisource time-series satellite imagery [in special issue: Remote sensing of cryosphere and related processes] Remote Sensing, 15 (24), 5726. 16, pp. https://doi.org/10.3390/rs15245726 <https://doi.org/10.3390/rs15245726> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.3390/rs15245726 |
container_title |
Remote Sensing |
container_volume |
15 |
container_issue |
24 |
container_start_page |
5726 |
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1788696858186481664 |