Coordinated mixing experiments

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Presentation transcript:

Coordinated mixing experiments Some physical processes to consider (as way to initiate discussion)

my pet peeve not distinguishing between mesoscale eddy processes (= = stirring; no transport across isopycnals) and irreversible diapycnal mixing. charge: develop better understanding of the physical processes responsible for stirring and mixing in the Arctic, and their representation in models

eddy dynamics/effects what is the role of vorticies in the lateral spread of water property anomalies, potential vorticity, organisms, ... and mass balance in pools of fresh water (e.g. Beaufort Gyre) how generated? how dissipated? how quantify their role/importance? tracer experiment(s)? eddy-resolving numerical experiments?

Thermohaline Intrusions? Barry Ruddick earlier in week: use Joyce model to relate turbulent dissipation to lateral fluxes by intrusions

diapycnal mixing and effects near-bottom mixing (main focus on shelves/slopes) dense plumes and entrainment transient wind-driven Ekman upwelling/downwelling arrested Ekman layer dynamics internal lee wave generation/breaking (tides, subinertial currents) bottom boundary layers geothermal buoyancy driving diapycnal mixing in the ocean interior (small?) internal wave breaking (near-surface and near-bottom wave generation, geostrophic adjustment?) double diffusion turbulent exchanges into and within the surface mixed layer air-sea gas exchange in sea-ice-covered ocean submesoscale/mixed layer processes?

Atmosphere-sea ice-ocean interaction Drag: air-ice, air-sea, ice-sea momentum exchanges buoyancy exchanges (heat, fresh water, chemicals, biological material…) Lead dynamics physical/bio interaction upper ocean stratification development, nutrient fluxes, phytoplankton blooms - light penetration - solar heating, NSTM,

1-D model experiments to compare/contrast representation of air-ice-sea boundary layer dynamics Role for more LES-type investigations?