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Evidence for significant protein-like dissolved organic matter accumulation in Sea of Okhotsk sea ice

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/70587

Title: Evidence for significant protein-like dissolved organic matter accumulation in Sea of Okhotsk sea ice
Authors: Granskog, Mats A. Browse this author
Nomura, Daiki Browse this author →KAKEN DB
Müller, Susann Browse this author
Krell, Andreas Browse this author
Toyota, Takenobu Browse this author →KAKEN DB
Hattori, Hiroshi Browse this author →KAKEN DB
Keywords: sea ice
sea-ice ecology
Issue Date: 2015
Publisher: Cambridge University Press
Journal Title: Annals of Glaciology
Volume: 56
Issue: 69
Start Page: 1
End Page: 8
Publisher DOI: 10.3189/2015AoG69A002
Abstract: Absorption and fluorescence of chromophoric dissolved organic matter (CDOM) in sea ice and surface waters in the southern Sea of Okhotsk was examined. Sea-water CDOM had featureless absorption increasing exponentially with shorter wavelengths. Sea ice showed distinct absorption peaks in the ultraviolet, especially in younger ice. Older first-year sea ice had relatively flat absorption spectra in the ultraviolet range. Parallel factor analysis (PARAFAC) identified five fluorescent CDOM components, two humic-like and three protein-like. Sea water was largely governed by humic-like fluorescence. In sea ice, protein-like fluorescence was found in considerable excess relative to sea water. The accumulation of protein-like CDOM fluorescence in sea ice is likely a result of biological activity within the ice. Nevertheless, sea ice does not contribute excess CDOM during melt, but the material released will be of different composition than that present in the underlying waters. Thus, at least transiently, the CDOM introduced during sea-ice melt might provide a more labile source of fresher protein-like DOM to surface waters in the southern Sea of Okhotsk.
Rights: © 2015 The Authors
http://creativecommons.org/licenses/by/4.0/
Relation: https://www.igsoc.org/
Type: article
URI: http://hdl.handle.net/2115/70587
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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