Physics @ Berkeley
Events in Physics
Title: What Drives The Weather Changes?    (Colloquia)
Start Date: 04/01/2013
Time: 4:15 pm
Location: 1 LeConte Hall
Speaker: Gregory Falkovich
Affiliation: Professor of Physics, Weizmann Institute
Contact Person: Sarah Wittmer   (510) 642-3034

The Earthís atmospheric flows are powered by gradients of solar heating: vertical gradients cause three-dimensional convection whereas horizontal gradients drive planetary scale planar flows. The question is whether the flows of intermediate scales (which form weather patterns) obtain their energy from a large-scale planar flows or from a small-scale 3D turbulence. The paradox is that planar flows do not transfer energy downscale whereas 3D turbulence does not support an upscale transfer. Iíll review theory, experiments and observations that shed light on this problem.