Sources of pollution and interrelationships between aerosol and precipitation chemistry at a central California site.

ABSTRACT: This study examines co-located aerosol and precipitation chemistry data between 2010 and 2016 at Pinnacles National Monument ~65 km east of the coastline in central California. Positive matrix factorization analysis of the aerosol composition data revealed seven distinct pollutant sources: aged sea salt (25.7% of PM_2.5), biomass burning (24.2% of PM_2.5), fresh sea salt (15.0% of PM_2.5), secondary sulfate (11.7% of PM_2.5), dust (10.0% of PM_2.5), vehicle emissions (8.2% of PM_2.5), and secondary nitrate (5.2% of PM_2.5). The influence of meteorology and transport on monthly patterns of PM_2.5 composition is discussed. Only secondary sulfate exhibited a statistically significant change (a reduction) over time

SUBMITTER: Dadashazar H 

PROVIDER: S-EPMC6246821 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature