Biogeochemical cycling of dissolved and particulate manganese in the northeast Pacific and Canadian western Arctic ...

• Main Author: Sim, Nari
• Format: Text
• Language: English
• Published: University of British Columbia 2018
• Subjects: Arctic; Arctic Ocean; Beaufort Sea
• Online Access: https://dx.doi.org/10.14288/1.0374222; https://doi.library.ubc.ca/10.14288/1.0374222

The biogeochemical cycling of manganese (Mn) in the ocean is regulated by the complex interaction between external sources, removal processes and its redox sensitive chemistry. The goal of this research was to expand our knowledge about the relative importance of each process, to assess the major controls on annual variability in Mn distributions, and to explore interaction between particulate and dissolved phases of Mn. To address these questions, the distribution of suspended particulate Mn (pMn) and dissolved Mn (dMn) in the northeast Pacific Ocean across the Line-P transect and the Beaufort Sea of the Arctic Ocean was evaluated in the context of the regional physical and chemical processes. Within the Summer Mixing Layer (SML) of the Line-P transect, it was found that eolian dust input and photo-reduction elevate dMn and the annual variability in dMn at the station nearest the shore is driven by variations in the strength of Ekman transport, which brings Mn-rich coastal water to this area. Below the SML, ...