Evaluating the Biogeochemistry of Dissolved Inorganic Carbon in the Canadian Arctic Archipelago Using Stable and Radiocarbon Isotopes ...

• Main Author: Jasperse, Liam
• Format: Thesis
• Language: English
• Published: Université d'Ottawa | University of Ottawa 2024
• Subjects: Arctic; Dissolved Inorganic Carbon; Carbon Cycling; Climate Change; Radiocarbon; Stable Carbon; Oceanography; FOS Earth and related environmental sciences; Canadian Arctic Archipelago; Pacific; Arctic Archipelago; Climate change; Global warming; Ice; Pacific Arctic; permafrost; Sea ice
• Online Access: https://dx.doi.org/10.20381/ruor-30272; https://ruor.uottawa.ca/handle/10393/46109

Human activity is unequivocally contributing to climate change and global warming (IPCC 2023). The oceans act to moderate climate by removing CO₂ (a greenhouse gas) from the atmosphere via air-sea gas exchange and sequestration as dissolved inorganic carbon (DIC). DIC is the largest actively cycling pool of carbon on Earth (38,000 Gt) and approximately half of all anthropogenic carbon emissions have already been absorbed by the world's oceans (IPCC 2023). Despite this, the Arctic is still warming at rates up to four times faster than the global average (Rantanen et al., 2022). Research suggests the Canadian Arctic Archipelago (CAA) is an important region for the marine carbon cycle (e.g. Papakyriakou & Miller, 2011; Zeidan et al., 2022) but its response to climate change remains poorly constrained. The CAA connects the Pacific, Arctic, and Atlantic Oceans. Melting permafrost, sea ice, changing biogeochemistry and increased freshwater flux within have the potential to impact local and global processes, ...