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Dr. Macdonald studies environmental pathways of organic carbon in Canada's Arctic waters including the Beaufort Sea, the Canadian Arctic Archipelago, Hudson Bay and coastal British Columbia. Within the context of organic carbon and hydrological pathways, Dr. Macdonald studies a number of contaminants including Hg and other metals, organochlorine compounds (e.g., PCBs, PBDEs, DDT) and hydrocarbons (e.g., PAHs, alkanes). Most of the research is conducted coastal waters and over shelves. He determines temporal trends and the behaviour of contaminating substances in the context of natural cycles of organic matter and fresh water bringing to bear such tools as water-mass analysis, transient and steady state tracers, stable isotope analyses (oxygen, carbon and lead), the determination of particle fluxes and sedimentation rates, multivariate statistics and modeling. Most of the major contaminant groups have been studied including PAH, metals, radionuclides, organochlorines, and other synthetic organic compounds like the nonylphenol ethoxylates.
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Science of The Total Environment (2020): 138962-138962
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