Raw and processed data of ambient aerosol size distributions measured by Spider DMA and Long DMA, at the Caltech campus in Pasadena, CA between 16 May–11 June 2020. Measurements were part of a study of the impacts of the COVID-19 pandemic shutdown on air quality.

Ambient particle size distributions measured with the Spider DMA and the TSI long-column DMA in Pasadena, CA, between May 16 - June 11, 2020.

VOC mixing ratios measured in Pasadena, CA from 4/16/2020-7/19/2020