This comprehensive content and reference work on atmospheric models covers not only the methods for numerical modeling, but also the related fields of assimilation and predictability. It includes distinct facets of environmental computer modeling, also the historical sketch of the subject radiative transfer equation and applications, approximation to land surface and atmospheric dynamics and data assimilation. Every single chapter is drafted by prominent professionals in their respective field. The authors have tried to provide extensive knowledge on several applications of atmospheric paradigm with the help of models.