Canada Basin: shelf-basin exchange and mechanisms
W. Maslowski, E. Watanabe, G. Nurser
The major science questions for these experiments are: (1) How much of the heat and fresh water associated with the Pacific Water are transported from the Chukchi shelf to the Canada Basin across the Beaufort shelf break by meso-scale eddies? (2) What are the mechanisms controlling generation and development of meso-scale eddies which are thought to play an important role in the shelf-basin mass, heat and fresh water exchanges? Conditions for this experiment and model output parameters are presented below.
a. Questions :
- How much of heat and freshwater associated with PW are transported from Chukchi shelf to Canada Basin across Beaufort shelf break by mesoscale eddies ?
- What is mechanisms controlling generation and development of mesoscale eddies which play a great role in the shelf-to-basin transport ?
b. Experiments :
- Drive eddy-resolving or eddy-permitting sea ice-ocean model by climatological or interannually varying atmospheric forcing
- Horizontal model resolution should be less than 10 km (W. Maslowski’s NAME : 9 km or 2 km?; E. Watanabe’s COCO : 2.5 km; G. Nurser’s model : global OCCAM 1/12 °, ~ 8 km resolution in the Arctic)
- Compare the simulation results with some observations (e.g. Pickart, 2004; Pickart et al., 2005) and idealized model experiments (e.g. Spall, 2008)
c. Which fields :
- Monthly mean time series of shelf-to-basin transport of PW tracer provided at Bering Strait, heat (referenced to seawater freezing point ?) and freshwater (referenced to 34.8 psu) across Beaufort shelf break
- Vertical section of PW, temperature, salinity and velocity across Barrow Canyon and Beaufort shelf break
- Mean and eddy kinetic energy in Canada Basin