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Quantifying international and interstate contributions to primary ambient PM2.5 and PM10 in a complex metropolitan atmosphere by Sourav Das; Joseph M. Prospero; Shankararaman Chellam is a Environmental Science article available to read on EtoBox.

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We quantify the contributions of long-range and regionally transported aerosols to ambient primary PM2.5 and PM10 in a representative United States industrialized/urban atmosphere via detailed elemental analysis and chemical mass balance (CMB) modeling after identifying their presence using a variety of publicly available satellite data/information, software products, and synoptic-scale aerosol models. A year-long study in Houston, Texas identified North African dust as the principal long-range global source of primary particulate matter (PM). CMB estimated transatlantic dust from the Sahara-Sahel region to be dominant in the summer months contributing an average of 3.5 μg m−3 to PM2.5 and 7.9 μg m− 3 to PM10 during May–August, i.e., the active Saharan dust season. Biomass burning was the chief source of regionally transported PM impacting air quality on different occasions throughout the year depending on the fire location. Four major biomass combustion events affecting air quality in Texas were calculated to contribute an average of 1.3 μg m−3 to PM2.5 and 1.4 μg m−3 to PM10 in corresponding samples whose origins were tracked to Canada, southeastern states of USA, and Central Ame

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Author

Sourav Das; Joseph M. Prospero; Shankararaman Chellam

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)