A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF)
Sea ice in the polar regions can move several tens of kilometres per day under the actions of winds, ocean currents, and internal stresses. Long-term observations of the rate and patterns of this motion are needed to characterize the full response of the polar environment to climate change. Here, we...
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Online Access: | https://doi.org/10.5194/essd-15-5807-2023 https://essd.copernicus.org/articles/15/5807/2023/ |
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ftcopernicus:oai:publications.copernicus.org:essd109273 2024-01-21T10:00:42+01:00 A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) Lavergne, Thomas Down, Emily 2023-12-20 application/pdf https://doi.org/10.5194/essd-15-5807-2023 https://essd.copernicus.org/articles/15/5807/2023/ eng eng doi:10.5194/essd-15-5807-2023 https://essd.copernicus.org/articles/15/5807/2023/ eISSN: 1866-3516 Text 2023 ftcopernicus https://doi.org/10.5194/essd-15-5807-2023 2023-12-25T17:24:16Z Sea ice in the polar regions can move several tens of kilometres per day under the actions of winds, ocean currents, and internal stresses. Long-term observations of the rate and patterns of this motion are needed to characterize the full response of the polar environment to climate change. Here, we introduce a new climate data record (CDR) of year-round, global, daily sea-ice drift vectors covering 1991–2020. The motion vectors are computed from series of passive microwave imagery in the winter months and from a parametric free-drift model in the summer months. An evaluation against on-ice buoy trajectories reveals that the RMSEs of the sea-ice drift CDR are small and vary with hemisphere and seasons (2.1 km for Arctic winters, 2.6 km for Arctic summer, 3 to 4 km for the Antarctic sea ice). The CDR is un-biased for Arctic winter conditions. The bias is larger for Antarctic and for summer sea-ice motion. The CDR consists of daily product files holding the d X and d Y components of the drift vectors on an Equal-Area Scalable Earth (EASE2) grid with 75 km spacing as well as associated uncertainties and flags. It is prepared in the context of the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) and is readily available at https://doi.org/10.15770/EUM_SAF_OSI_0012 ( OSI SAF , 2022 ) . Text Antarc* Antarctic Arctic Climate change Sea ice Copernicus Publications: E-Journals Antarctic Arctic The Antarctic Earth System Science Data 15 12 5807 5834 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Sea ice in the polar regions can move several tens of kilometres per day under the actions of winds, ocean currents, and internal stresses. Long-term observations of the rate and patterns of this motion are needed to characterize the full response of the polar environment to climate change. Here, we introduce a new climate data record (CDR) of year-round, global, daily sea-ice drift vectors covering 1991–2020. The motion vectors are computed from series of passive microwave imagery in the winter months and from a parametric free-drift model in the summer months. An evaluation against on-ice buoy trajectories reveals that the RMSEs of the sea-ice drift CDR are small and vary with hemisphere and seasons (2.1 km for Arctic winters, 2.6 km for Arctic summer, 3 to 4 km for the Antarctic sea ice). The CDR is un-biased for Arctic winter conditions. The bias is larger for Antarctic and for summer sea-ice motion. The CDR consists of daily product files holding the d X and d Y components of the drift vectors on an Equal-Area Scalable Earth (EASE2) grid with 75 km spacing as well as associated uncertainties and flags. It is prepared in the context of the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) and is readily available at https://doi.org/10.15770/EUM_SAF_OSI_0012 ( OSI SAF , 2022 ) . |
format |
Text |
author |
Lavergne, Thomas Down, Emily |
spellingShingle |
Lavergne, Thomas Down, Emily A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) |
author_facet |
Lavergne, Thomas Down, Emily |
author_sort |
Lavergne, Thomas |
title |
A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) |
title_short |
A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) |
title_full |
A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) |
title_fullStr |
A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) |
title_full_unstemmed |
A climate data record of year-round global sea-ice drift from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) |
title_sort |
climate data record of year-round global sea-ice drift from the eumetsat ocean and sea ice satellite application facility (osi saf) |
publishDate |
2023 |
url |
https://doi.org/10.5194/essd-15-5807-2023 https://essd.copernicus.org/articles/15/5807/2023/ |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic Climate change Sea ice |
genre_facet |
Antarc* Antarctic Arctic Climate change Sea ice |
op_source |
eISSN: 1866-3516 |
op_relation |
doi:10.5194/essd-15-5807-2023 https://essd.copernicus.org/articles/15/5807/2023/ |
op_doi |
https://doi.org/10.5194/essd-15-5807-2023 |
container_title |
Earth System Science Data |
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15 |
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12 |
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5807 |
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5834 |
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1788703453559652352 |