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Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors
https://nipr.repo.nii.ac.jp/records/15627
https://nipr.repo.nii.ac.jp/records/15627ba8307d6-ffb1-4584-83fe-5bf9fdef2bb0
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2019-06-30 | |||||
タイトル | ||||||
タイトル | Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Temporal variability and trends of sea ice in the Kara Sea and their relationship with atmospheric factors | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Sea ice | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Spatial-temporal variation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | EOF pattern | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Winter accumulated temperature | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Meridional wind | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Kara sea | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Duan, Chenglin
× Duan, Chenglin× Dong, Sheng× Xie, Zexiao× Wang, Zhifeng |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 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. | |||||
書誌情報 |
en : Polar Science 巻 20P2, p. 136-147, 発行日 2019-06 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.polar.2019.03.002 | |||||
関連名称 | 10.1016/j.polar.2019.03.002 |