Of the regulated outdoor air pollutants, PM2.5 has the largest cumulative health impact. Given that we spend the vast majority of our time indoors, our exposure to outdoor air pollutants such as PM predominantly happens in the indoor environment. This talk will discuss tandem outdoor and indoor aerosol composition measurements made with the aerosol mass spectrometer (AMS) to measure changes due to gradients in temperature and relative humidity upon transport to the indoor environment. Additional examination of these datasets will demonstrate how air handling and indoor sources (occupants, residual tobacco smoke, and human activities) can further modify the composition of indoor particles. This talk will draw from several outdoor/indoor studies performed in a classroom setting, as well as the HOMEChem study in a residential test house.
Peter DeCarlo is an Associate Professor in the Department of Environmental Health and Engineering in the Whiting School of Engineering at Johns Hopkins University. His research has focused on the measurement of the size and composition of aerosol particles from urban to remote and outdoors to in.
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