DYNAMICAL-SYSTEMS BASED ON A MESOSPHERIC PHOTOCHEMICAL MODEL

The photochemical Chapman model is generalized using those constituent s and reactions that are relevant in the mesosphere. The model constit utes a non-linear, non-autonomous dynamical system. We analyze some of its properties; especially periodical and asymptotically stable solut ions. Bifurcation phenomena are discussed. The comparison with ozone m easurements through microwave spectroscopy and furthermore with models which include dynamical and transport processes show that a photochem ical model leads to a reasonable description of the ozone concentratio n in the mesosphere. (C) 1998 Published by Elsevier Science B.V.