Tracing the Distribution of Pb and Trace Elements in the Canadian Arctic from the Atmosphere to the Ocean

Trace elements (TEs) play important roles in biogeochemical processes in the Arctic and understanding their cycling along with their isotopes will help us understand better the warming induced changes in the Arctic. This dissertation measured Pb, its isotopes and other TEs in aerosols and seawater s...

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Bibliographic Details
Main Author: De Vera, Joan
Other Authors: Bergquist, Bridget, Earth Sciences
Format: Thesis
Language:unknown
Published: 2020
Subjects:
aerosols
Arctic Ocean
Baffin Bay
Canadian Arctic Archipelago
trace elements
trace metal isotopes
0425
Arctic
Arctic Archipelago
Baffin
Online Access:http://hdl.handle.net/1807/100936
Description
Summary:Trace elements (TEs) play important roles in biogeochemical processes in the Arctic and understanding their cycling along with their isotopes will help us understand better the warming induced changes in the Arctic. This dissertation measured Pb, its isotopes and other TEs in aerosols and seawater samples collected in the Canadian Arctic. Lead and its isotopes are useful particulate source tracers and can be used to understand particulate contaminant inputs and oceanic circulation. Iron is also evaluated because it is an important micronutrient for primary production in the ocean. This study shows that anthropogenic aerosols from Europe and Russia (Eurasia) still dominate during the Arctic Haze period (winter–spring) and particulate pollution levels are relatively stable in the Arctic since the 2000s. This study also traced the anthropogenic Pb from aerosols to the Canadian Arctic seawater using Pb isotope measurements. Historic Eurasian Pb with distinctively low 206Pb/207Pb ( Ph.D.

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