= Flow over an ice lead = [[TracNav(gallery/toc)]] == Flow over an ice lead (2006) #iceflow {{{#!html }}} '''Project:''' [[imuk/projects/2007_01|The Physics of turbulence over Antarctic leads and polynyas and its parameterization: a joint study using observations, LES and a micro-/mesoscale model]]\\ \\ '''Responsible:''' [[imuk/members/witha|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||[[htdocs:gallery/movies/lead.flv|Download]] || ----