This two-year, $190,000 Project Grant from the National Science Foundation's Division of Atmospheric and Geospace Sciences will support investigations into atmospheric chlorine chemistry in the Arctic and its potential to create secondary organic aerosol. Funded under the Geosciences program (CFDA 47.050), which aims to expand fundamental knowledge of the integrated Earth system through basic research, this fellowship will examine the low-temperature oxidation of volatile organic compounds by chlorine atoms in laboratory experiments. The postdoctoral fellow will develop an updated halogen mechanism for the GEOS-Chem global chemical transport model incorporating the secondary organic aerosol yields determined from the flow tube experiments. Modeling experiments will then quantify the contribution of chlorine-initiated volatile organic compound oxidation to secondary organic aerosol formation globally and in the Arctic specifically.
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