Increasing co-occurrence of fine particulate matter and ground-level ozone extremes in the western United States.

ABSTRACT: Wildfires and meteorological conditions influence the co-occurrence of multiple harmful air pollutants including fine particulate matter (PM_2.5) and ground-level ozone. We examine the spatiotemporal characteristics of PM_2.5/ozone co-occurrences and associated population exposure in the western United States (US). The frequency, spatial extent, and temporal persistence of extreme PM_2.5/ozone co-occurrences have increased significantly between 2001 and 2020, increasing annual population exposure to multiple harmful air pollutants by ~25 million person-days/year. Using a clustering methodology to characterize daily weather patterns, we identify significant increases in atmospheric ridging patterns conducive to widespread PM_2.5/ozone co-occurrences a

SUBMITTER: Kalashnikov DA 

PROVIDER: S-EPMC8730618 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature