Comparison of measured residential black carbon levels outdoors and indoors with fixed-site monitoring data and with dispersion modelling

• DOI: 10.1007/s11356-020-12134-8
• Publication Date: 2020-12-19T21:12:23Z
• Authors: Olena Gruzieva; Antonios Georgelis; Niklas Andersson; Tom Bellander; Christer Johansson; Anne-Sophie Merritt
• Keywords: Exposure Assessment

Abstract Epidemiologic studies on health effects of air pollution usually rely time-series ambient monitoring data or spatially modelled levels. Little is known how well these estimate residential outdoor and indoor We investigated the agreement measured black carbon (BC) levels outdoors indoors with fixed-site calculated using a Gaussian dispersion model. One-week BC measurements were conducted for 15 families living in central Stockholm. Time-series from urban background street-level monitors compared to measurements. The observed weekly concentrations also standardized reflect annual averages, levels, long-term as estimated by modelling. Weekly average level was 472 ng/m 3 (range 261–797 ). corresponding street 313 1039 , respectively. Urban variation explained 50% temporal averaged over 24 h. Modelled comparable home 49% spatial variability. median indoor/outdoor ratio across all addresses 0.79, no difference between day night time. Common exposure estimation approaches epidemiology related displayed high validity residencies monitored half day-to-day variability at addresses. Long-term modelling differences Indoor tended be somewhat lower than