Characterisation of colored dissolved organic matter in Hudson Bay and Hudson Strait using parallel factor analysis

Authors: C. Gu?guen a,*, M.A. Granskog b,c, G. McCullough b, D.G. Barber b
a Department of Chemistry, Trent University, Peterborough, Ontario, Canada
b Centre for Earth Observation Science, Department of Environment and Geography, University of Manitoba, Winnipeg, Manitoba, Canada
c Norweigan Ploar Institute, Polar Environmental Centre, Tromsø, Norway.

Summary
In this study, 63 surface samples from Hudson Bay and Hudson Strait were analyzed by excitation emission matrix spectroscopy and parallel factor analysis. Three components were identified. Two humic substances out of which one was a marine humic like substance and the third component was a protein like component.
Component peaks are given in following table.
Component    Excitation    Emission    Description
C1    <260 (348)    482    Terrestrial Humic-Like
C2    <260 (308)    406    Marine Humic-Like
C3    (<260) 280    342    Amino Acids in Proteins

The intensities of identified PARAFAC components at Hudson Strait, NE Hudson Bay, SE Hudson Bay, James Bay, and SW Hudson Bay are shown in following figure.
Coefficients of determination (p < 0.05) between salinity (S > 4), runoff fraction, DOC, CDOM absorption coefficient, slope parameters, and intensity of individual components derived from the PARAFAC model are shown in the following table.


      

Reviewer: Aamir Alaud-din
aamiralauddin@gist.ac.kr