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Climatic assessment of circum-Arctic permafrost zonation over the last 122 kyr
https://nipr.repo.nii.ac.jp/records/16911
https://nipr.repo.nii.ac.jp/records/169114d80b991-65fe-4752-9642-2ef92baf3500
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-05-26 | |||||
| タイトル | ||||||
| タイトル | Climatic assessment of circum-Arctic permafrost zonation over the last 122 kyr | |||||
| タイトル | ||||||
| タイトル | Climatic assessment of circum-Arctic permafrost zonation over the last 122 kyr | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Permafrost zonation | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Circum-Arctic | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Glacial-interglacial timescale | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Statistical modeling | |||||
| 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 |
Saito, Kazuyuki
× Saito, Kazuyuki× Okuno, Jun'ichi× Machiya, Hirokazu× Iwahana, Go× Ohno, Hiroshi× Yokohata, Tokuta |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Permafrost is an important climate factor of the cold-region environments, known to evolve over a long timescale. Although direct observations are required for the exact determination of presence, this is difficult especially in remote areas. An indirect assessment of permafrost zonation can help in estimating the probable extents and providing an understanding of its spatiotemporal variability under different climate. In this paper, we adopt a previously defined indirect assessment method using freezing and thawing indices, which was revised and evaluated against new observation-based dataset. The revised method was applied to time-series of the circum-Arctic environment for the past 122 kyr constructed from a Greenland ice core, present-day reanalysis climatology, and a glacial isostatic adjustment model, and subsequently, examined in terms of the aggregation, persistence, and retreat of permafrost. Permafrost zones over exposed land varied between 9.11 million km2 (interglacial) and 26.7 million km2 (glacial); the maximum extent of subsea and subglacial permafrost was 7.7 million km2 and 0.5 million km2, respectively. The climatic sensitivity of its areal extent was examined for the meridional temperature gradient in the polar amplification (increase by 0.2 million km2 []−1 when warming occurs) and the global mean annual temperature (decrease by 4.3 million km2 −1). | |||||
| 書誌情報 |
en : Polar Science 巻 31, p. 100765, 発行日 2022-03 |
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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.2021.100765 | |||||
| 関連名称 | 10.1016/j.polar.2021.100765 | |||||
