| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2023-04-20 |
| タイトル |
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|
タイトル |
Shallow firn cores 1989–2019 in southwest Greenland's percolation zone reveal decreasing density and ice layer thickness after 2012 |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| アクセス権 |
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|
アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Åsa K. Rennermalm
Regine Hock
Federico Covi
Jing Xiao
Giovanni Corti
Jonathan Kingslake
Sasha Z. Leidman
Clément Miège
Michael Macferrin
Horst Machguth
Erich Osterberg
Takao Kameda
Joseph R. McConnell
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Refreezing of meltwater in firn is a major component of Greenland ice-sheet's mass budget, but in situ observations are rare. Here, we compare the firn density and total ice layer thickness in the upper 15 m of 19 new and 27 previously published firn cores drilled at 15 locations in southwest Greenland (1850–2360 m a.s.l.) between 1989 and 2019. At all sites, ice layer thickness covaries with density over time and space. At the two sites with the earliest observations (1989 and 1998), bulk density increased by 15–18%, in the top 15 m over 28 and 21 years, respectively. However, following the extreme melt in 2012, elevation-detrended density using 30 cores from all sites decreased by 15 kg m−3 a−1 in the top 3.75 m between 2013 and 2019. In contrast, the lowest elevation site's density shows no trend. Thus, temporary build-up in firn pore space and meltwater infiltration capacity is possible despite the long-term increase in Greenland ice-sheet melting. |
|
言語 |
en |
| 書誌情報 |
en : Journal of Glaciology
巻 68,
号 269,
p. 431-442,
発行日 2022-06
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| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1017/jog.2021.102 |
| 権利 |
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|
言語 |
en |
|
権利情報 |
© The Author(s), 2021 |
| 出版者 |
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出版者 |
Cambridge University Press |
|
言語 |
en |
| 著者版フラグ |
|
|
言語 |
en |
|
値 |
publisher |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
shallow-firn-cores-1989-2019-in-southwest-greenlands-percolation-zone-reveal-decreasing-density-and-ice-layer-thickness-after-2012(1).pdf (3.4 MB)
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