Data for "Revealing the sources and sinks of negative cluster ions in an urban environment through quantitative analysis"

This file consists of the detection efficiency of APi-TOF, the time series of total negative cluster ions and CS in urban Beijing, and the average spectrums of negative clusters ions measured by APi-TOF during haze and clean periods in urban Beijing, which have been analyzed in the manuscript "Revealing the sources and sinks of negative cluster ions in an urban environment through quantitative analysis". For more details, please contact the author (rujing.yin@helsinki.fi).