Fire Smoke Elevated the Carbonaceous PM_2.5 Concentration and Mortality Burden in the Contiguous U.S. and Southern Canada.

ABSTRACT: Despite emerging evidence on the health impacts of fine particulate matter (PM_2.5) from wildland fire smoke, the specific effects of PM_2.5 composition on health outcomes remain uncertain. We developed a three-level, chemical transport model-based framework to estimate daily full-coverage concentrations of smoke-derived carbonaceous PM_2.5, specifically Organic Carbon (OC) and Elemental Carbon (EC), at a 1 km² spatial resolution from 2002 to 2019 across the contiguous U.S. (CONUS) and Southern Canada (SC). Cross-validation demonstrated that the framework performed well at both the daily and monthly levels. Modeling results indicated that increases in wildland fire smoke have offset approximately one-third of the improvements in background air quali

SUBMITTER: Jin Z 

PROVIDER: S-EPMC11601856 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature