The User's Reactivity Analysis Code (URAC) is a computation facility which
allows a user, with minimum effort or knowledge of atmospheric chemistry
and computation techniques, to simulate and display atmospheric-chemistry
interactions on desktop and laptop computers. It is based on a simple box-model
approach, and accommodates three different reaction parameterizations:
Carbon Bond 4, SAPRC-90, and SAPRC-97. The codes are intended for Unix
systems, and were prepared using Macintosh and Sun platforms. They can be
operated in a simple batch mode or through the use of an X-Windows - based
graphical user interface (GUI).
The GUI-based code requires installation of plotting utilities and associated
software, which are available for download over the Internet. Both the GUI and
batch-based codes can be downloaded from the directory ftp/URAC_Codes on the
Columbia Geosciences FTP site as follows:
Host Name: cgenv.com
Username: guest.cgenv.com
Password: download
The directory structure indicated on the ftp source should be preserved on the
downloaded files to ensure that the included scripts and makefiles operate
properly.
NOTE: This is VERSION 1.2, which corrects problems in VERSION 1.1 associated with
plotting and sensitivity calculations at extended simulation times.
An Acrobat file of the URAC user's manual is available over the following link:
Pluvius II is a Fortran code that simulates storm formation and associated
wet and dry chemistry, along with attendant wet-removal processes. Operable in
one, two or three dimensions, this code accepts input in the form of chemistry and
cloud-physics parametrizations, along with wind data, to generate the associated
distributions of clouds, precipitation, and dry and wet chemistry.
The basic code, plus code for example two-dimensional simulations, can be downloaded
from the directories within ftp/pluvius.dir/codes.dir on the Columbia Geosciences
FTP site as follows:
Host Name: cgenv.com
Username: guest.cgenv.com
Password: download
Pluvius II is described in Atmos. Environ., Vol. 23, 2017-2031 (1989), and an Acrobat
file of the Pluvius II user's manual is available over the following link: