Particle number (CN3) hourly medians measured at Kennaook Cape Grim 1977 to 2007 using the Automated Pollack Counter

This data set is the record of hourly median number concentration for particles greater than 3 nm in diameter (CN3) measured at the Kennaook Cape Grim Baseline Air Pollution Monitoring Station (KCGBAPS) between 1977 and 2007. The KCGBAPS is located on the northwest tip of Tasmania (40.6833° S, 144.6833° E). Commencing operations in 1976, and in its current facilities since 1981, the Baseline Air Pollution Station at Kennaook Cape Grim is Australia’s contribution to international efforts for monitoring the global background atmosphere for trends due to human activities and natural variability. Subsets of these data have been described in Bigg et al. (1984), Gras (1990a), Gras (1990b), Gras and Whittlestone (1992), Gras (1995), Gras and Keywood (2017). See KCGBAPS_CN3_Pollack_1977_2007_README.pdf for references and details of measurement method