Clouds in Planetary
Atmospheres

Shows the complex
cloud structures observed on Jupiter by the Galileo Spacecraft.
Brown Dwarfs, however, which are more massive and generally hotter than Jupiter, can have
condensation of silicates and iron vapor near their photospheres rather
than water and ammonia, as we see on Jupiter.
From June 2000 -
December 2002, I
worked
under the advisement of Professor
Jonathan I. Lunine in the Department
of Planetary Sciences / Lunar and Planetary Laboratory here at the University of Arizona. The
work was done in partial fulfillment of the requirements of the doctoral program in Planetary
Sciences.
In the
spirit of the UA Theoretical
Astrophysics Program, we colloborated
with David Sudarsky and Adam Burrows in
the Department of Astronomy /
Steward Observatory and Drew
Milsom
in the Department
of Physics.
Our work involved the development one-dimensional
models of clouds in brown dwarf and giant planet atmospheres to assist
in radiative transfer calculations of these dusty atmospheres. We
demonstrated the feasibility of incorporating a simple cloud
model into planetary radiative transport models directly. Our
work has
since been published in the Astrophysical Journal:
C.S.
Cooper, D. Sudarsky, J.A. Milsom, J.I. Lunine, and A. Burrows,
"Modeling the Formation of Clouds in Brown Dwarf Atmospheres," The Astrophysical Journal,
v586 n2, April 1, 2003. You
can download the Cooper
et al. (2003) paper in Adobe
Acrobat (PDF)
format here. Posted here
with permission from the Astrophysical Journal.
Module Source Code
We are
releasing the source
code
used in these calculations to the astronomy community under
the terms of the GNU
General Public License. The source code file is a
gzipped tarball.1
The cloud
module itself is written in Standard C, but the
module is callable from Fortran. The example program sample_f77.f
demonstrates how to do this using GNU C (gcc) and GNU
Fortran 77 (g77)
in Linux. Please contact me
if you have trouble compiling the source code on your platform.
Additionally,
you may browse the source
code documentation files.
These are parsed from the model
source code directly using the fabulous Doxygen
source code documentation tool.
Click here to download the user
guide
for the model, also in PDF
format. Created using the free Latex document preparation system.
1Use
'gunzip'
followed by 'tar -xvf' on the file after it is
downloaded in order to access the source tree (or just tar -zxvf if you
have GNU tar
installed).