Urban Background (ub) and Roadside (rs) MOUDI data File: ub_rs_MOUDI_data_dMbydLogDp.csv Sampling Dates: 04 June 2019 - 23 July 2019 (See table S2 of the Supplementary). Weeks: w01 to w07 Stages: sg01 to st10 Merged Number Size Distribution (NSD)s data (sizebins: 14.6nm to 10.2µm) Files: ub_merged_NSD_data_dNbydLogDp.csv and rs_merged_NSD_data_dNbydLogDp.csv Sampling Dates: 17/06/2019 14:00:00 to 12/08/2019 20:00:00