Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2
We investigate sea ice conditions during the 2020 melt season, when warm air temperature anomalies in Spring led to early melt onset, an extended melt season and the second-lowest September minimum Arctic ice extent observed. We focus on the region of the most persistent ice cover and examine melt p...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/egusphere-2023-189 https://noa.gwlb.de/receive/cop_mods_00064986 https://egusphere.copernicus.org/preprints/egusphere-2023-189/egusphere-2023-189.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064986 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064986 2023-05-15T15:10:57+02:00 Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 Buckley, Ellen Margaret Farrell, Sinéad Louise Herzfeld, Ute C. Webster, Melinda A. Trantow, Thomas Baney, Oliwia N. Duncan, Kyle A. Han, Huilin Lawson, Matthew 2023-02 electronic https://doi.org/10.5194/egusphere-2023-189 https://noa.gwlb.de/receive/cop_mods_00064986 https://egusphere.copernicus.org/preprints/egusphere-2023-189/egusphere-2023-189.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-189 https://noa.gwlb.de/receive/cop_mods_00064986 https://egusphere.copernicus.org/preprints/egusphere-2023-189/egusphere-2023-189.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-189 2023-02-20T00:14:01Z We investigate sea ice conditions during the 2020 melt season, when warm air temperature anomalies in Spring led to early melt onset, an extended melt season and the second-lowest September minimum Arctic ice extent observed. We focus on the region of the most persistent ice cover and examine melt pond depth retrieved from ICESat-2 using two distinct algorithms in concert with a time series of melt pond fraction and ice concentration derived from Sentinel-2 imagery to obtain insights about the melting ice surface in three dimensions. We find melt pond fraction derived from Sentinel-2 in the study region increased rapidly in June, with the mean melt pond fraction peaking at 16 % +/- 6 % on 24 June 2020, followed by a slow decrease to 8 % +/- 6 % by 3 July, and remained below 10 % for the remainder of the season through 15 September. Sea ice concentration was consistently high (>95 %) at the beginning of the melt season until 4 July, and as floes disintegrated, decreased to a minimum of 70 % on July 30, then became more variable ranging from 75 % to 90 % for the remainder of the melt season. Pond depth increased steadily from a median depth of 0.40 m +/- 0.17 m in early June, peaked at 0.97 m +/- 0.51 m on 16 July, even as melt pond fraction had already started to decrease. Our results demonstrate that by combining high-resolution passive and active remote sensing we now have the ability to track evolving melt conditions and observe changes in the sea ice cover throughout the summer season. Article in Journal/Newspaper Arctic Sea ice Niedersächsisches Online-Archiv NOA Arctic |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Buckley, Ellen Margaret Farrell, Sinéad Louise Herzfeld, Ute C. Webster, Melinda A. Trantow, Thomas Baney, Oliwia N. Duncan, Kyle A. Han, Huilin Lawson, Matthew Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 |
topic_facet |
article Verlagsveröffentlichung |
description |
We investigate sea ice conditions during the 2020 melt season, when warm air temperature anomalies in Spring led to early melt onset, an extended melt season and the second-lowest September minimum Arctic ice extent observed. We focus on the region of the most persistent ice cover and examine melt pond depth retrieved from ICESat-2 using two distinct algorithms in concert with a time series of melt pond fraction and ice concentration derived from Sentinel-2 imagery to obtain insights about the melting ice surface in three dimensions. We find melt pond fraction derived from Sentinel-2 in the study region increased rapidly in June, with the mean melt pond fraction peaking at 16 % +/- 6 % on 24 June 2020, followed by a slow decrease to 8 % +/- 6 % by 3 July, and remained below 10 % for the remainder of the season through 15 September. Sea ice concentration was consistently high (>95 %) at the beginning of the melt season until 4 July, and as floes disintegrated, decreased to a minimum of 70 % on July 30, then became more variable ranging from 75 % to 90 % for the remainder of the melt season. Pond depth increased steadily from a median depth of 0.40 m +/- 0.17 m in early June, peaked at 0.97 m +/- 0.51 m on 16 July, even as melt pond fraction had already started to decrease. Our results demonstrate that by combining high-resolution passive and active remote sensing we now have the ability to track evolving melt conditions and observe changes in the sea ice cover throughout the summer season. |
format |
Article in Journal/Newspaper |
author |
Buckley, Ellen Margaret Farrell, Sinéad Louise Herzfeld, Ute C. Webster, Melinda A. Trantow, Thomas Baney, Oliwia N. Duncan, Kyle A. Han, Huilin Lawson, Matthew |
author_facet |
Buckley, Ellen Margaret Farrell, Sinéad Louise Herzfeld, Ute C. Webster, Melinda A. Trantow, Thomas Baney, Oliwia N. Duncan, Kyle A. Han, Huilin Lawson, Matthew |
author_sort |
Buckley, Ellen Margaret |
title |
Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 |
title_short |
Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 |
title_full |
Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 |
title_fullStr |
Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 |
title_full_unstemmed |
Observing the Evolution of Summer Melt on Multiyear Sea Ice with ICESat-2 and Sentinel-2 |
title_sort |
observing the evolution of summer melt on multiyear sea ice with icesat-2 and sentinel-2 |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-189 https://noa.gwlb.de/receive/cop_mods_00064986 https://egusphere.copernicus.org/preprints/egusphere-2023-189/egusphere-2023-189.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
https://doi.org/10.5194/egusphere-2023-189 https://noa.gwlb.de/receive/cop_mods_00064986 https://egusphere.copernicus.org/preprints/egusphere-2023-189/egusphere-2023-189.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/egusphere-2023-189 |
_version_ |
1766341881413763072 |