Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors
In this paper, temporal variability and trends of sea ice in the Kara Sea and their correlations with local atmospheric forcing have been quantified and analyzed based on NSDIC SIC dataset and ECMWF ERA-Interim dataset from 1979 to 2017. The sea ice starts to melt in early May and becomes fully froz...
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Format: | Article in Journal/Newspaper |
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ftnipr:oai:nipr.repo.nii.ac.jp:00015627 2023-05-15T16:59:52+02:00 Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors 2019-06 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15627 http://id.nii.ac.jp/1291/00015522/ en eng https://doi.org/10.1016/j.polar.2019.03.002 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15627 http://id.nii.ac.jp/1291/00015522/ Polar Science, 20P2, 136-147(2019-06) 18739652 Sea ice Spatial-temporal variation EOF pattern Winter accumulated temperature Meridional wind Kara sea Journal Article 2019 ftnipr https://doi.org/10.1016/j.polar.2019.03.002 2022-12-03T19:43:10Z In this paper, temporal variability and trends of sea ice in the Kara Sea and their correlations with local atmospheric forcing have been quantified and analyzed based on NSDIC SIC dataset and ECMWF ERA-Interim dataset from 1979 to 2017. The sea ice starts to melt in early May and becomes fully frozen at the end of December. The ice melting process is much slower than freezing process. Since 2005, the lowest coverage has been nearly to be 5%, meaning the extensive ice-free condition in summer. The EOF1 patterns of SIC anomaly coincide well with the spatial patterns of trends of SIC. In winter, the whole domain almost remains unchanged and the declining trends are less than −5%/decade but with two high-value regions between −5 and −15%/decade in northwest and southwest. In summer, the sea ice area, extent and relative concentration have been declining significantly with SIC exceeding −15%/decade in the northern part. The decreasing SIC condition is closely sensitive to air temperature over sea surface with correlation coefficients between 0.5 and 1 in the whole domain. Winter accumulative temperature can significantly determine the ice regime in the following melt-freeze period. Correlation coefficients between winter accumulative temperature and melt-freeze sea ice anomaly index, duration of melt-freeze period can up to be −0.85 and 0.77, respectively. Since 2005, the summer sea ice anomaly index becomes closely related to meridional wind with correlation coefficient approaching 0.72. This sea ice motion becomes more sensitive and easily driven by the meridional strong winds when in lower SIC conditions due to the less internal ice stresses. Article in Journal/Newspaper Kara Sea Polar Science Polar Science Sea ice National Institute of Polar Research Repository, Japan Kara Sea Polar Science 20 136 147 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Sea ice Spatial-temporal variation EOF pattern Winter accumulated temperature Meridional wind Kara sea |
spellingShingle |
Sea ice Spatial-temporal variation EOF pattern Winter accumulated temperature Meridional wind Kara sea Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors |
topic_facet |
Sea ice Spatial-temporal variation EOF pattern Winter accumulated temperature Meridional wind Kara sea |
description |
In this paper, temporal variability and trends of sea ice in the Kara Sea and their correlations with local atmospheric forcing have been quantified and analyzed based on NSDIC SIC dataset and ECMWF ERA-Interim dataset from 1979 to 2017. The sea ice starts to melt in early May and becomes fully frozen at the end of December. The ice melting process is much slower than freezing process. Since 2005, the lowest coverage has been nearly to be 5%, meaning the extensive ice-free condition in summer. The EOF1 patterns of SIC anomaly coincide well with the spatial patterns of trends of SIC. In winter, the whole domain almost remains unchanged and the declining trends are less than −5%/decade but with two high-value regions between −5 and −15%/decade in northwest and southwest. In summer, the sea ice area, extent and relative concentration have been declining significantly with SIC exceeding −15%/decade in the northern part. The decreasing SIC condition is closely sensitive to air temperature over sea surface with correlation coefficients between 0.5 and 1 in the whole domain. Winter accumulative temperature can significantly determine the ice regime in the following melt-freeze period. Correlation coefficients between winter accumulative temperature and melt-freeze sea ice anomaly index, duration of melt-freeze period can up to be −0.85 and 0.77, respectively. Since 2005, the summer sea ice anomaly index becomes closely related to meridional wind with correlation coefficient approaching 0.72. This sea ice motion becomes more sensitive and easily driven by the meridional strong winds when in lower SIC conditions due to the less internal ice stresses. |
format |
Article in Journal/Newspaper |
title |
Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors |
title_short |
Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors |
title_full |
Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors |
title_fullStr |
Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors |
title_full_unstemmed |
Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors |
title_sort |
temporal variability and trends of sea ice in the kara sea and their relationship with atmospheric factors |
publishDate |
2019 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15627 http://id.nii.ac.jp/1291/00015522/ |
geographic |
Kara Sea |
geographic_facet |
Kara Sea |
genre |
Kara Sea Polar Science Polar Science Sea ice |
genre_facet |
Kara Sea Polar Science Polar Science Sea ice |
op_relation |
https://doi.org/10.1016/j.polar.2019.03.002 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15627 http://id.nii.ac.jp/1291/00015522/ Polar Science, 20P2, 136-147(2019-06) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2019.03.002 |
container_title |
Polar Science |
container_volume |
20 |
container_start_page |
136 |
op_container_end_page |
147 |
_version_ |
1766052365333430272 |