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The influence of residential and workday population mobility on exposure to air pollution in the UK

Reis, Stefan; Liska, Tomas; Vieno, Massimo; Carnell, Edward J.; Beck, Rachel; Clemens, Tom; Dragosits, Ulrike; Tomlinson, Samuel J.; Leaver, David; Heal, Mathew R.. 2018 The influence of residential and workday population mobility on exposure to air pollution in the UK. Environment International, 121 (1). 803-813. https://doi.org/10.1016/j.envint.2018.10.005

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Abstract/Summary

Traditional approaches of quantifying population-level exposure to air pollution assume that concentrations of air pollutants at the residential address of the study population are representative for overall exposure. This introduces potential bias in the quantification of human health effects. Our study combines new UK Census data comprising information on workday population densities, with high spatio-temporal resolution air pollution concentration fields from the WRF-EMEP4UK atmospheric chemistry transport model, to derive more realistic estimates of population exposure to NO2, PM2.5 and O3. We explicitly allocated workday exposures for weekdays between 8:00 am and 6:00 pm. Our analyses covered all of the UK at 1 km spatial resolution. Taking workday location into account had the most pronounced impact on potential exposure to NO2, with an estimated 0.3 μg m−3 (equivalent to 2%) increase in population-weighted annual exposure to NO2 across the whole UK population. Population-weighted exposure to PM2.5 and O3 increased and decreased by 0.3%, respectively, reflecting the different atmospheric processes contributing to the spatio-temporal distributions of these pollutants. We also illustrate how our modelling approach can be utilised to quantify individual-level exposure variations due to modelled time-activity patterns for a number of virtual individuals living and working in different locations in three example cities. Changes in annual-mean estimates of NO2 exposure for these individuals were considerably higher than for the total UK population average when including their workday location. Conducting model-based evaluations as described here may contribute to improving representativeness in studies that use small, portable, automatic sensors to estimate personal exposure to air pollution.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1016/j.envint.2018.10.005
CEH Sections/Science Areas: Atmospheric Chemistry and Effects (Science Area 2017-)
Pollution (Science Area 2017-)
ISSN: 0160-4120
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL link.
NORA Subject Terms: Health
Atmospheric Sciences
Data and Information
Date made live: 23 Oct 2018 10:21 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/521204

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