Flow over an ice lead
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Flow over an ice lead (2006)
Project: The Physics of turbulence over Antarctic leads and polynyas and its parameterization: a joint study using observations, LES and a micro-/mesoscale model
Responsible: Björn Witha?
Description: Leads in sea ice are responsible for most of the latent and sensible heat transfer from ocean to atmosphere within the marginal ice zones. The animation displays a flow along x (from left to right with a geostrophic wind of about 3 m/s) from sea ice over a lead of 1000m width. The incoming flow is laminar (without turbulence), neutrally stratified, and capped by an inversion above 300m. The surface temperature of ice is assumed to be -23.3C, while the open sea water has a temperature near the freezing point of about -3C. Particles are released near the surface and closely below the inversion. The particle color reflects the buoyancy at the current particle position (red: positive, blue: negative). The particle size is proportional to the magnitude of the vertical velocity component. Cyclic boundary conditions along y are assumed. Convection is generated above the lead but the flow re-stratifies soon after passing the lead. The spatial resolution of the model is still insufficient to resolve the turbulent convection above the first half (upstream part) of the lead.
| Model Setup | |
|---|---|
| Total domain size (x|y|z): | 5760m x 1280m x 1477m |
| Grid spacing (x|y|z): | 10m x 10m x 10m |
| Number of grid points (x|y|z): | 576 x 128 x 66 |
| Simulated time: | 45min |
| CPU-time: | 2600s |
| Number of CPUs: | 32 |
| Machine/ processor type: | IBM-Regatta / Power4 |
| Visualization software: | DSVR |
| Download | ||
|---|---|---|
| Video Format | File size | |
| Flash (.flv) | 7.5mb | Download |
