Three study themes are identified in the SOS Science Plan:
- Local vs. regional contrasts- similarities/differences between regions of the country and the relative importance of local emissions versus transported pollution.
- Ozone and PM formation in plumes- how fast and how efficiently are O3 and fine particles produced in urban and power plant plumes.
- Diurnal cycle in chemistry and meteorology- role of nighttime chemistry and transport in the formation and distribution of O3 and fine particles.
These themes will be addressed through a series of coordinated measurements involving instrumented aircraft and a ground-based network of chemistry and meteorological measurements
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