Wildfire Impacts on O₃ in the Continental United States Using PM_2.5 and a Generalized Additive Model (2018-2023).

ABSTRACT: We examined PM_2.5 and Hazard Mapping System smoke plume satellite data at ∼600 United States (US) air monitoring stations to identify surface smoke on 14.0% of all May-September days for 2018-2023, with large influences in 2020 and 2021, due to California fires, and 2023, due to Canadian fires. Days with smoke have an average of 11 μg m^-3 more PM_2.5 and 8 ppb higher maximum daily 8 h average (MDA8) O₃ concentrations than nonsmoke days, and they also account for 94% of all days that exceed the daily PM_2.5 health standard (35 μg m^-3) and 36% of all days that exceed the O₃ health standard (70 ppb). To estimate the smoke contributions to the O₃ MDA8, Generalized Additive Models (GAMs) were built for each si

SUBMITTER: Lee H 

PROVIDER: S-EPMC11340019 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature