Effects of Snow and Remineralization Processes on Nutrient Distributions in Multi-Year Antarctic Landfast Sea Ice

Sahashi, Reishi; Nomura, Daiki; Toyota, Takenobu; Tozawa, Manami; Ito, Masato; Wongpan, Pat; Ono, Kazuya; Simizu, Daisuke; Naoki, Kazuhiro; Nosaka, Yuichi; Tamura, Takeshi; Aoki, Shigeru; Ushio, Shuki

Effects of Snow and Remineralization Processes on Nutrient Distributions in Multi-Year Antarctic Landfast Sea Ice

Sahashi, Reishi; Nomura, Daiki; Toyota, Takenobu et al.

Journal of Geophysical Research Oceans, 2022, 127(7), e2021JC018371

Permalink : https://hdl.handle.net/2115/87739

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アクセス権	open access
URI	https://hdl.handle.net/2115/87739
タイトル	Effects of Snow and Remineralization Processes on Nutrient Distributions in Multi-Year Antarctic Landfast Sea Ice
著者	Sahashi, Reishi ; Nomura, Daiki ; Toyota, Takenobu ; Tozawa, Manami ; Ito, Masato ; Wongpan, Pat ; Ono, Kazuya ; Simizu, Daisuke ; Naoki, Kazuhiro ; Nosaka, Yuichi ; Tamura, Takeshi ; Aoki, Shigeru ; Ushio, Shuki
著者名 Sahashi, Reishi
e-Rad_Researcher 70550739 著者名 Nomura, Daiki
e-Rad_Researcher 80312411 著者名 Toyota, Takenobu
著者名 Tozawa, Manami
著者名 Ito, Masato
著者名 Wongpan, Pat
e-Rad_Researcher 40396320 著者名 Ono, Kazuya
著者名 Simizu, Daisuke
著者名 Naoki, Kazuhiro
e-Rad_Researcher 40803408 著者名 Nosaka, Yuichi
e-Rad_Researcher 40451413 著者名 Tamura, Takeshi
e-Rad_Researcher 80281583 著者名 Aoki, Shigeru
e-Rad_Researcher 50211769 著者名 Ushio, Shuki
言語	英語
キーワード	sea ice
	snow
	nutrients
	remineralization
	multi-year landfast ice
	fast ice
	East Antarctica
発行日	2022-07-01
出版者	American Geophysical Union
収録物名	Journal of Geophysical Research Oceans
巻(号)	127(7)
ページ	e2021JC018371
抄録	We elucidated the effects of snow and remineralization processes on nutrient distributions in multi-year landfast sea ice (fast ice) in Lutzow-Holm Bay, East Antarctica. Based on sea-ice salinity, oxygen isotopic ratios, and thin section analyses, we found that the multi-year fast ice grew upward due to the year-by-year accumulation of snow. Compared to ice of seawater origin, nutrient concentrations in shallow fast ice were low due to replacement by clean and fresh snow. In deeper ice of seawater origin (the lower half of the multi-year fast ice column), remineralization was dominated by the degradation of organic matter. By comparison between first- and muti-year ice, the biological uptake and the remineralization were dominated in relatively young ice and older ice, respectively, under the physical process of brine drainage.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright 2022. American Geophysical Union.
PISSN	2169-9275
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1029/2021JC018371