[Characteristics and Source Analysis of Volatile Organic Compounds in Typical Ozone Pollution Processes During Summer in Jinan, China].

Based on a typical ozone （O） pollution process in Jinan City from June 16 to 26, 2021, the variation characteristics of O and its precursor volatile organic compounds （VOCs） during different pollution periods （clean period （CP）, pollution rise period （PRP）, heavy pollution period （HPP）, and pollution decline period （PDP）） in the urban area were analyzed. Both positive matrix factorization （PMF） and an observation-based model （OBM） were used to identify the main sources of VOCs, O production mechanisms, and sensitive species. The results showed that the average value of （O-8h） during the HPP period in the urban area was （246.