ArticleEnvironmental science: atmospheres2026
Fine-scale variations in black carbon concentrations and the chemical composition of total suspended particulate matter at a heavy traffic road intersection in Addis Ababa, Ethiopia.
Article in Environmental science: atmospheres, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Atmospheric aerosols in Ethiopian urban environments remain poorly characterized. This study investigated the spatiotemporal variability of equivalent black carbon (eBC) concentrations and the molecular composition of organics in total suspended particulate matter (TSPM) collected in urban Addis Ababa. The level of eBC was monitored at major traffic intersections from January 2024 to December 2025. eBC concentrations were measured using a portable MicroAeth AE51. TSPM samples were collected on Teflon filters using a Leland Legacy sampler and analyzed by reversed-phase liquid chromatography coupled to electrospray ionization interfaced to quadrupole time-of-flight mass spectrometry (RPLC-ESI-QTOFMS) operated in the negative ion mode. The study revealed substantial spatiotemporal variability in eBC concentration, with a mean of 26.24 ± 42.81 µg m
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