This course in an introduction to experimental methods focused on measurements of atmospheric gases and particulates associated with air quality. Upon completion of this course, the student should have knowledge of the theory behind commonly used and research-grade atmospheric instrumentation, as well as practical lab/field skills and data analysis for ambient studies of air pollutants. Students will make measurements in the Ford ES&T penthouse lab of ambient ozone, nitrogen oxides and carbon monoxide and PM2.5 chemical composition, number distributions and optical properties. Some experiments with more advanced research-grade instruments may also be included.