Lake ice break-up in Greenland: timing and spatiotemporal variability
Synthetic aperture radar (SAR) data from the Sentinel-1 (S1) mission with its high temporal and spatial resolution allows for an automated detection of lake ice break-up timings from surface backscatter differences across south (S), southwest (SW), and northwest (NW) Greenland (<71° N latitude) d...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2024
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Online Access: | https://doi.org/10.5194/tc-18-2035-2024 https://noa.gwlb.de/receive/cop_mods_00073318 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071491/tc-18-2035-2024.pdf https://tc.copernicus.org/articles/18/2035/2024/tc-18-2035-2024.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00073318 2024-06-02T08:07:24+00:00 Lake ice break-up in Greenland: timing and spatiotemporal variability Posch, Christoph Abermann, Jakob Silva, Tiago 2024-04 electronic https://doi.org/10.5194/tc-18-2035-2024 https://noa.gwlb.de/receive/cop_mods_00073318 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071491/tc-18-2035-2024.pdf https://tc.copernicus.org/articles/18/2035/2024/tc-18-2035-2024.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-18-2035-2024 https://noa.gwlb.de/receive/cop_mods_00073318 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071491/tc-18-2035-2024.pdf https://tc.copernicus.org/articles/18/2035/2024/tc-18-2035-2024.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/tc-18-2035-2024 2024-05-07T02:17:27Z Synthetic aperture radar (SAR) data from the Sentinel-1 (S1) mission with its high temporal and spatial resolution allows for an automated detection of lake ice break-up timings from surface backscatter differences across south (S), southwest (SW), and northwest (NW) Greenland (<71° N latitude) during the period 2017 to 2021. Median break-up dates of the 563 studied lakes range between 8 June and 10 July, with the earliest being in 2019 and the latest in 2018. There is a strong correlation between the break-up date and elevation, while a weak relationship with latitude and lake area could be observed. Lake-specific median break-up timings for 2017–2021 increase (i.e., are later) by 3 d per 100 m elevation gain. When assuming an earlier break-up timing of 8 d which corresponds to the observed median variability of ±8 d, the introduced excess energy due to a changing surface albedo from snow-covered ice surface to water translates to melting 0.4 ± 0.1 m thick ice at the melting point or heating up a water depth down to 35 ± 3 m by 1 K across the entire surface area of each respective lake. Upscaling the results to 100 486 lakes across the S, SW, and NW regions, which correspond to 64.5 % of all lakes or 62.1 % of the overall lake area in Greenland, yields an estimate of 1.8 × 106 TJ additional energy input. This translates to melting 5.8 Gt ice at the melting point or warming 432.3 Gt water by 1 K. Article in Journal/Newspaper Greenland The Cryosphere Niedersächsisches Online-Archiv NOA Greenland The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) The Cryosphere 18 4 2035 2059 |
institution |
Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Posch, Christoph Abermann, Jakob Silva, Tiago Lake ice break-up in Greenland: timing and spatiotemporal variability |
topic_facet |
article Verlagsveröffentlichung |
description |
Synthetic aperture radar (SAR) data from the Sentinel-1 (S1) mission with its high temporal and spatial resolution allows for an automated detection of lake ice break-up timings from surface backscatter differences across south (S), southwest (SW), and northwest (NW) Greenland (<71° N latitude) during the period 2017 to 2021. Median break-up dates of the 563 studied lakes range between 8 June and 10 July, with the earliest being in 2019 and the latest in 2018. There is a strong correlation between the break-up date and elevation, while a weak relationship with latitude and lake area could be observed. Lake-specific median break-up timings for 2017–2021 increase (i.e., are later) by 3 d per 100 m elevation gain. When assuming an earlier break-up timing of 8 d which corresponds to the observed median variability of ±8 d, the introduced excess energy due to a changing surface albedo from snow-covered ice surface to water translates to melting 0.4 ± 0.1 m thick ice at the melting point or heating up a water depth down to 35 ± 3 m by 1 K across the entire surface area of each respective lake. Upscaling the results to 100 486 lakes across the S, SW, and NW regions, which correspond to 64.5 % of all lakes or 62.1 % of the overall lake area in Greenland, yields an estimate of 1.8 × 106 TJ additional energy input. This translates to melting 5.8 Gt ice at the melting point or warming 432.3 Gt water by 1 K. |
format |
Article in Journal/Newspaper |
author |
Posch, Christoph Abermann, Jakob Silva, Tiago |
author_facet |
Posch, Christoph Abermann, Jakob Silva, Tiago |
author_sort |
Posch, Christoph |
title |
Lake ice break-up in Greenland: timing and spatiotemporal variability |
title_short |
Lake ice break-up in Greenland: timing and spatiotemporal variability |
title_full |
Lake ice break-up in Greenland: timing and spatiotemporal variability |
title_fullStr |
Lake ice break-up in Greenland: timing and spatiotemporal variability |
title_full_unstemmed |
Lake ice break-up in Greenland: timing and spatiotemporal variability |
title_sort |
lake ice break-up in greenland: timing and spatiotemporal variability |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/tc-18-2035-2024 https://noa.gwlb.de/receive/cop_mods_00073318 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071491/tc-18-2035-2024.pdf https://tc.copernicus.org/articles/18/2035/2024/tc-18-2035-2024.pdf |
long_lat |
ENVELOPE(73.317,73.317,-52.983,-52.983) |
geographic |
Greenland The Sentinel |
geographic_facet |
Greenland The Sentinel |
genre |
Greenland The Cryosphere |
genre_facet |
Greenland The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-18-2035-2024 https://noa.gwlb.de/receive/cop_mods_00073318 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071491/tc-18-2035-2024.pdf https://tc.copernicus.org/articles/18/2035/2024/tc-18-2035-2024.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-18-2035-2024 |
container_title |
The Cryosphere |
container_volume |
18 |
container_issue |
4 |
container_start_page |
2035 |
op_container_end_page |
2059 |
_version_ |
1800752475070791680 |