Variability in dissolved organic matter optical properties in surface waters in the Amerasian Basin

Surface absorption and fluorescence measurements of Dissolved Organic Matter (DOM) were conducted along with hydrographic parameters in the Canada and Makarov Basins. Parallel factor analysis of DOM fluorescence identified four humic-like and one protein-like component in all 107 surface samples. Ba...

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Bibliographic Details
Published in:Frontiers in Marine Science
Main Authors: Celine eGueguen, Motoyo eItoh, Takashi eKikuchi, Jane eEert, William J. Williams
Format: Article in Journal/Newspaper
Language:English
Published: Frontiers Media S.A. 2015
Subjects:
Ice Cover
Canada Basin
CDOM
Makarov Basin
FDOM
frontal zone
Science
Q
General. Including nature conservation
geographical distribution
QH1-199.5
Canada
canada basin
makarov basin
Online Access:https://doi.org/10.3389/fmars.2015.00078
https://doaj.org/article/f66c835514b14b03b4ea97781eff0c77
Description
Summary:Surface absorption and fluorescence measurements of Dissolved Organic Matter (DOM) were conducted along with hydrographic parameters in the Canada and Makarov Basins. Parallel factor analysis of DOM fluorescence identified four humic-like and one protein-like component in all 107 surface samples. Based on strong negative trends observed between the spectral slope in the 275-295 nm range and absorption at 370 nm, and four humic-like components C1-C4, the DOM character was found to be basin-dependent. The Makarov basin surface DOM was largely dominated by high molecular weight and humic-rich material whereas the Canada Basin surface DOM was more heterogeneous with a marked influence of in situ production. This study highlights that absorbing and fluorescing measurements can be used successfully to trace and differentiate DOM from diverse sources and across frontal zones, and as such can be convenient and complementary tools for the better understanding of marine biogeochemical cycling of carbon.

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