期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 502, 期 -, 页码 537-547出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2014.09.059
关键词
Urban air pollution; Exposure; Air quality monitoring; Wireless distributed sensor network
资金
- German-Israeli Foundation for Scientific Research and Development (GIF) Young Scientist Program [2301-2296.10]
- Environment and Health Fund (Israel) Grant Award [RPGA 1201]
- 7th European Framework Program (FP7) ENV.2012.6.5-1 [308524, ENV.2012.6.5-1]
- Technion Center of Excellence in Exposure Science and Environmental Health (TCEEH)
Accurate evaluation of air pollution on human-wellbeing requires high-resolution measurements. Standard air quality monitoring stations provide accurate pollution levels but due to their sparse distribution they cannot capture the highly resolved spatial variations within cities. Similarly, dedicated field campaigns can use tens of measurement devices and obtain highly dense spatial coverage but normally deployment has been limited to short periods of no more than few weeks. Nowadays, advances in communication and sensory technologies enable the deployment of dense grids of wireless distributed air monitoring nodes, yet their sensor ability to capture the spatiotemporal pollutant variability at the sub-neighborhood scale has never been thoroughly tested. This study reports ambient measurements of gaseous air pollutants by a network of six wireless multi-sensor miniature nodes that have been deployed in three urban sites, about 150 m apart. We demonstrate the network's capability to capture spatiotemporal concentration variations at an exceptional fine resolution but highlight the need for a frequent in-situ calibration to maintain the consistency of some sensors. Accordingly, a procedure for a field calibration is proposed and shown to improve the system's performance. Overall, our results support the compatibility of wireless distributed sensor networks for measuring urban air pollution at a sub-neighborhood spatial resolution, which suits the requirement for highly spatiotemporal resolved measurements at the breathing-height when assessing exposure to urban air pollution. (C) 2014 Elsevier B.V. All rights reserved.
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