Air-Sea CO₂ Cycling in Arctic Coastal Seas: Case Studies in the Canadian Arctic Archipelago and Hudson Bay ...

• Main Author: Ahmed, Mohamed M. M.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Graduate Studies 2020
• Subjects: marine carbon cycle; Arctic shelves; air-sea CO₂ exchange; Hudson Bay; Canadian Arctic Archipelago; biogeochemical modeling; sea-ice; CO₂ flux; freshwater stratification; Biogeochemistry; Environmental Sciences; Earth Sciences; Arctic; Hudson; Arctic Archipelago; Climate change; Sea ice
• Online Access: https://dx.doi.org/10.11575/prism/38922; https://prism.ucalgary.ca/handle/1880/113494

In contrast to the open ocean, the sources and sinks for atmospheric carbon dioxide (CO₂) in the coastal ocean are source of large uncertainties when budgeting the global ocean carbon sink. This is mainly because of the different characteristics of coastal seas, and strong spatial and temporal heterogeneity. Furthermore, the coastal ocean has been substantially impacted by human activities (e.g., hydroelectric damming, overfishing, shipping, etc.) and is now considered one of the most sensitive parts of the marine environment to climate change. As a result, it is vital to study the carbon cycle and quantify the air-sea CO₂ fluxes in these regions to predict and understand how they may change in response to future climate change. In this thesis, I address this knowledge gap in two Arctic coastal seas by studying the spatial and temporal variability of surface water CO₂ partial pressure (pCO₂) and by quantifying air-sea CO₂ fluxes. Using continuous underway ship measurements of pCO₂, salinity, sea surface ...