Investigating the role of highly oxygenated molecules (HOM) in aerosol using a newly developed box model PyCHAM

Highly oxygenated molecules (HOM) are crucial in the processes of secondary organic aerosol (SOA). In this thesis, two studies on HOM are carried out. The first one applies a simplified HOM scheme to PyCHAM, a newly developed box mode, to simulate alpha-pinene ozonolysis experiments in the dark environment in two different chambers, and concludes the essential role of the second-generation autoxidation. The second study develops and tests a more mechanistic HOM scheme in PyCHAM to investigate the binary system containing alpha-pinene and isoprene in terms of SOA production. These two studies can contribute to a better understanding of HOM as the precursors of SOA production. A command-line tool that can co-operate with PyCHAM is developed and used in both studies.