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An artificial pool experiment in Antarctic sea ice : effects of sea ice melting on physical and biogeochemical components of pool water

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Title: An artificial pool experiment in Antarctic sea ice : effects of sea ice melting on physical and biogeochemical components of pool water
Authors: Nomura, Daiki Browse this author →KAKEN DB
Simizu, Daisuke Browse this author
Chavanich, Suchana Browse this author
Shinagawa, Hideo Browse this author
Fukuchi, Mitsuo Browse this author
Keywords: sea ice
nutrients
dissolved inorganic carbon
phytoplankton bloom
water stratification
Southern Ocean
Issue Date: 13-Sep-2012
Publisher: Cambridge University Press
Journal Title: Antarctic Science
Volume: 24
Issue: 5
Start Page: 536
End Page: 544
Publisher DOI: 10.1017/S0954102012000284
Abstract: We performed an artificial pool experiment in the Antarctic multi-year land-fast ice to examine and simulate the effect of sea ice melting on physical and biogeochemical components of the sea ice field. The input of snow and ice meltwater resulted in warmer, low salinity water at the surface of the pool and probably stratification of the less dense water. Current speed measurements also pointed to water stratification within the pool. Rapid phytoplankton growth in the pool resulted in drastic decreases in concentrations of dissolved inorganic carbon and nutrients (NO3- and Si(OH)4) in the surface waters of the pool, particularly depleted for NO3-. There was high correlation between variations of dissolved inorganic carbon and nutrient concentrations, but the apparent uptake ratios of these components deviated from that generally applied to marine phytoplankton. The sequence of changes in the physical and biogeochemical components of the pool water suggests that the onset of rapid phytoplankton growth was closely related to the water stratification, which provided stable conditions for phytoplankton bloom even though the supply of nutrients from under-ice water would have declined.
Rights: This article has been published in a revised form in Antarctic Science https://doi.org/10.1017/S0954102012000284. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © Antarctic Science Ltd 2012.
Type: article (author version)
URI: http://hdl.handle.net/2115/70583
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 野村 大樹

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