[Grad-postdoc-assn] ASP Seminar on Thursday March 23rd at 11 am in
FL2 1022
Vani Cheruvu
vani at ucar.edu
Mon Mar 20 22:17:46 MST 2006
Please come, and bring interested others, to the
Advanced Study Program Seminar. Details follows:
==========================
SPEAKER:
Prof. Mark Rast
Lab Atmos/Space Physics
APS-Astro&Planet Sciences
University of Colorado at Boulder
TIME: Thursday March 23rd at 11 am
LOCATION: FL2 1022
TITLE: Turbulent scale selection and transport in the
solar
photosphere
ABSTRACT: Turbulent convection in the outer layers of the
Sun occurs on somewhat discrete small and intermediate
spatial scales: granulation, mesogranulation, and
supergranulation, but convective motions on the global
scale (depth of the layer) are not observed. The observed
scales appear to originate with the advective interaction
of downflow plumes in the solar radiative boundary layer.
Such motions are critical not only to turbulent heat
transport but also to the operation of the solar magnetic
dynamo, by determining the effective horizontal diffusion
of magnetic elements in the Sun's surface layers. This
talk focusses on two simple n-body dynamical models, one
of point sinks and the other of point vortices, and how
they might inform solar observations and laboratory
measurements.
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