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Biogeochemical properties of water in surface ponds on Antarctic fast ice and their relationship with underlying sea-ice properties

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Title: Biogeochemical properties of water in surface ponds on Antarctic fast ice and their relationship with underlying sea-ice properties
Authors: Nomura, Daiki Browse this author →KAKEN DB
Simizu, Daisuke Browse this author
Shinagawa, Hideo Browse this author
Oouchida, Chinatsu Browse this author
Fukuchi, Mitsuo Browse this author
Issue Date: 2011
Publisher: Cambridge University Press
Journal Title: Journal of Glaciology
Volume: 57
Issue: 205
Start Page: 848
End Page: 856
Publisher DOI: 10.3189/002214311798043825
Abstract: Surface ponds on Antarctic fast ice were examined by measuring temperature, salinity and concentrations of chlorophyll a (Chl-a), dissolved inorganic carbon (DIC) and nutrients (NO3 + NO2, PO4 and SiO2) in the surface pond water and under-ice water. Sea-ice cores were also collected from the bottom of a surface pond (pond-ice core) and from a site away from the pond (bare-ice core). Time-series measurements of surface pond water temperature showed that it varied with solar radiation rather than with air temperature. Comparison of water properties between surface pond water and under-ice water suggested that DIC and nutrients were consumed by biological productivity during pond formation. Depth profiles of nutrient concentrations in the pond-ice core suggested the remineralization of organic matter at the bottom of the surface pond. The Chl-a concentration was lower at the bottom of the pond-ice core than in the bare-ice core, suggesting that surface pond formation reduces ice algae abundance in sea ice because meltwater flushes algae from the porous sea ice into the under-ice water.
Rights: © 2011 International Glaciological Society
https://creativecommons.org/licenses/by/4.0/
Relation: https://www.igsoc.org/journal/
Type: article
URI: http://hdl.handle.net/2115/70579
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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