Chemical Integration Software

ASAD is a software package developed for creating and integrating chemistry schemes in atmospheric models without the need to write any FORTRAN code to solve the chemical rate equations.

Developed by : Dr. Glenn Carver, Dr. Paul Brown, & Dr. Oliver Wild
Centre for Atmospheric Science, Cambridge University, UK.


Available Information

What's New  
Last altered: 20/4/04
Latest: Bug fix for FYINIT subroutine

More Information about ASAD

Join the ASAD mailing list

ASAD citations

ASAD User Guide
(PDF format: 288Kb : Needs Acrobat V3)



Software Features

A paper describing ASAD has been published in: Computer Physics Communications, 105, 197-215 (1997).

ASAD is being actively used by groups in the UK, Germany, Japan and the USA.

User supplies a list of chemical species and reactions to define the chemical scheme. No code needs to be written.

ASAD understands common approximations such as chemical families and the steady state aproximation.

Several time integration schemes are built-in, including an efficient scheme suitable for use with 3D transport models or GCMs.

ASAD can be used in box, 1D, 2D or 3D models without any code changes. Only the calling routine from the model needs to be altered.

ASAD includes interface routines for photolysis, heterogeneous reactions, ground emissions, wet/dry deposition code supplied by the user.

A reaction database (compiled from published IUPAC and JPL kinetic data assessments) is included for building your own chemistry schemes.

ASAD is written in standard FORTRAN77 and will run on virtually any computer with a FORTRAN compiler.

Web site designed and maintained by Dr. Glenn Carver.
(c) 1997-2004. Centre for Atmospheric Science, Cambridge University, UK. No duplication or retransmission of text of logo is allowed. The ASAD Logo must not be used electronically or otherwise without permission.