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Visuals	ATMS/CHEM 458 Autumn 07 Lecture Summary	Week
Week 1 Slides	We discussed measures of composition, atmospheric structure, and typical horizontal and vertical transport timescales	1
Week 2 Slides	We introduced the concepts of mass balance, sources, sinks, and lifetime. We also described how to construct and use simple models.	2
Week 3 Slides	We covered the biogeochemical cycles of Nitrogen, Oxygen and Carbon. We used estimates of the cycling rates to help explain Earth' s current composition, and to compare with the compositions of other planetary atmospheres	3
Week 4 Slides	We developed a simple energy balance model to demonstrate the effect atmospheric composition has on climate through the greenhouse effect and albedo (aerosols/clouds). We have also begun our introduction to chemical kinetics and photochemistry.	4
Week  5 Slides  Chapman Model-1  Chapman Model-2	We began our discussion of stratospheric ozone chemistry, starting with the Chapman mechanism. We then covered catalytic ozone destruction cycles important for ozone loss rates in the equatorial and mid-latitude regions (HOx, NOx, and ClOx). Available for download is a Matlab chemistry model that solves the Chapman mechanism rate equations as a function of time (2 files).	5
Week 6 Slides	We discussed in detail the evolution and causes of the Antarctic O3 hole as well as the role of heterogeneous chemistry, volcanoes, and the future of stratospheric ozone.	6
Week 7 Slides	We moved into the troposphere with a focus on understanding the factors that control the oxidative capacity (OH). We covered the catalytic oxidation of CO and CH4 by HOx in the presence of NOx, and the sources, sinks, and distribution of O3, CO, CH4, and NOx.	7