This document is the first chapter in an online textbook about chemical transport models (CTMs). The textbook is part of a postgraduate module on the subject, run by Daniel Jacob at Harvard University. The document introduces CTMs and their applications in "interpreting atmospheric observations in terms of our understanding of underlying processes". An important distinction is made between CTMs and general circulation models (GCMs), which simulate the global atmospheric system, whereas CTMs use empirical observations as an input to the model.
Cut and past the pdf url to your browser:
http://www-as.harvard.edu/chemistry/trop/education/jacob_lectures_ctms_chap1.pdf
