Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2020-03-11 |
タイトル |
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タイトル |
Coastal acidification induced by biogeochemical processes driven by sea-ice melt in the western Arctic ocean |
タイトル |
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言語 |
en |
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タイトル |
Coastal acidification induced by biogeochemical processes driven by sea-ice melt in the western Arctic ocean |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
pH |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Acidification |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Sea-ice loss |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Arctic ocean |
資源タイプ |
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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 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
Qi, Di
Chen, Baoshan
Chen, Liqi
Lin, Hongmei
Gao, Zhongyong
Sun, Hen
Zhang, Yuanhui
Sun, Xiuwu
Cai, Weijun
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
To better understand the extent of acidification in the Arctic Ocean, we present pH measurements collected along a shelf-slope-basin transect from the Chukchi Sea shelf to the Chukchi Abyssal Plain (CAP) in the western Arctic Ocean during the summer 2010 Chinese Arctic National Research Expedition (CHINARE) cruise. We observed low pH values in the Chukchi Sea shelf bottom waters (~30 m-bottom) and CAP upper haloline layer (UHL) (100–200 m). In the shelf bottom waters, the pH values were 7.66–8.13, about 0.07–0.68 pH units lower than the surface values of 8.20–8.24. In the CAP subsurface waters, the pH values were 7.85–7.98, about 0.08–0.31 pH units lower than the surface values of 8.20–8.24. Biogeochemical model simulations suggest that remineralized CO2 driven by sea-ice loss is primarily responsible for the low pH values in the bottom waters of the Chukchi Sea (shelf) and the UHL waters of the CAP (basin). Recent sea-ice melt enhanced organic matter production in surface waters and subsequent supported the increased microbial respiration of organic matter in bottom waters. Moreover, low pH bottom waters were flushed into the UHL during winter to sustain the low pH characteristics in the subsurface basin layers. In addition, our simplified model suggests that the thermodynamic effect of pH is small. However, increasing temperature significantly increased aragonite saturation (Ωarag) which slowed down the speed of acidification. |
書誌情報 |
en : Polar Science
巻 23,
p. 100504,
発行日 2020-03
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ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
18739652 |
DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1016/j.polar.2020.100504 |
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関連名称 |
10.1016/j.polar.2020.100504 |