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Numerical modelling of the ocean circulation in the Canadian Arctic Archipelago

  • Author / Creator
    Wang, Qiang
  • The Canadian Arctic Archipelago (CAA) is a complex network of straits and basins connecting the Arctic Ocean and the Atlantic Ocean. It is one of the main pathways for freshwater outflow from the Arctic Ocean to the Atlantic Ocean. Circulation and associated variability in the CAA are examined in this thesis using numerical models. After correcting for shortwave radiation, the CAA model captures much of the observed spatiotemporal structure of the sea ice and ocean circulation in the Canadian Arctic Archipelago, especially, the southward flow in M’Clintock Channel and cyclonic circulation in eastern Lancaster Sound. The momentum balance of ocean currents is studied and we found that the southward flow in M’Clintock Channel is driven by ageostrophic accelerations and is controlled by topography. Vorticity dynamics analysis shows that both stratification and bathymetry have a strong impact on the circulation in eastern Lancaster Sound. We did some sensitivity experiments to study the impact of the stress on the volume transport through Lancaster Sound and Nares Strait. We found that the ice stress on the ocean in Parry Channel has a strong impact on the seasonal variation of volume transport through Lancaster Sound. The boundary flows also have a strong impact on the volume transport through Lanaster Sound and Nares Striat. The ice stress on the ocean in Parry Channel, stress on the ocean in Nares Strait, stress on the ocean in Baffin Bay all have an impact on the seasonal variation of volume transport through Nares Strait.

  • Subjects / Keywords
  • Graduation date
    2012-11
  • Type of Item
    Thesis
  • Degree
    Doctor of Philosophy
  • DOI
    https://doi.org/10.7939/R3T66N
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Doctoral
  • Department
    • Department of Earth and Atmospheric Sciences
  • Supervisor / co-supervisor and their department(s)
    • Paul G. Myers and Andrew B.G Bush
  • Examining committee members and their departments
    • Vincent L St. Louis (Univ. of Alberta, Biological Sciences)
    • Christian Haas (University of Alberta, Earth and Atmospheric Sciences),
    • Yves Gratton (University of Québec Institut National de la Recherche Scientifique)