This comprehensive text describes the atmospheric processes, numerical methods, and computational techniques required for a scientist to successfully study air pollution and meteorology. Computer modeling has become a powerful tool in modern atmospheric sciences, combining the disciplines of meteorology, physics, mathematics, chemistry, computer sciences, and, to a lesser extent, geology, biology, microbiology, and oceanographic sciences. This text presents fundamental equations that have been developed for physical, chemical, and dynamical variables in the atmosphere, and it provides numerical methods to solve these equations. Along with classic methods of simulating dynamical meteorology, the text contains several numerical techniques not available in any other text for simulating gas and aerosol processes. This is a valuable textbook for graduate and upper-level undergraduate courses in atmospheric sciences and meteorology departments. It will also be useful for courses in earth sciences, environmental sciences, and applied mathematics departments. Read Less