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Assessing Mobility-Based Real-Time Air Pollution Exposure in Space and Time Using Smart Sensors and GPS Trajectories in Beijing

Author

Listed:
  • Jing Ma
  • Yinhua Tao
  • Mei-Po Kwan
  • Yanwei Chai

Abstract

Using real-time data from portable air pollutant sensors and smartphone Global Positioning System trajectories collected in Beijing, China, this study demonstrates how smart technologies and individual activity-travel microenvironments affect the assessment of individual-level pollution exposure in space and time at a very fine resolution. It compares three different types of individual-level exposure estimates generated by using residence-based monitoring station assessment, mobility-based monitoring station assessment, and mobility-based real-time assessment. Further, it examines the differences in personal exposure to PM2.5 associated with different activity places and travel modes across various environmental conditions. The results show that the exposure estimates generated by monitoring station assessment and real-time sensing assessment vary substantially across different activity locations and travel modes. Individual-level daily exposure for residents living in the same community also varies significantly, and there are substantial differences in exposure levels using different approaches. These results indicate that residence- or mobility-based monitoring station assessments, which cannot account for the differences in air pollutant exposures between outdoor and indoor environments and between different travel-related microenvironments, could generate considerably biased estimates of personal pollution exposure. Key Words: indoor environment, real-time exposure to air pollution, smart technologies, travel modes, the uncertain geographic context problem.

Suggested Citation

  • Jing Ma & Yinhua Tao & Mei-Po Kwan & Yanwei Chai, 2020. "Assessing Mobility-Based Real-Time Air Pollution Exposure in Space and Time Using Smart Sensors and GPS Trajectories in Beijing," Annals of the American Association of Geographers, Taylor & Francis Journals, vol. 110(2), pages 434-448, March.
    • Handle: RePEc:taf:raagxx:v:110:y:2020:i:2:p:434-448
    DOI: 10.1080/24694452.2019.1653752
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    Citations

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    Cited by:

    1. Jie Song & Suhong Zhou & Yinong Peng & Jianbin Xu & Rongping Lin, 2022. "Relationship between neighborhood land use structure and the spatiotemporal pattern of PM2.5 at the microscale: Evidence from the central area of Guangzhou, China," Environment and Planning B, , vol. 49(2), pages 485-500, February.
    2. Yiming Tan & Mei-Po Kwan & Zifeng Chen, 2020. "Examining Ethnic Exposure through the Perspective of the Neighborhood Effect Averaging Problem: A Case Study of Xining, China," IJERPH, MDPI, vol. 17(8), pages 1-17, April.
    3. Siyu Ma & Lin Yang & Mei-Po Kwan & Zejun Zuo & Haoyue Qian & Minghao Li, 2021. "Do Individuals’ Activity Structures Influence Their PM 2 . 5 Exposure Levels? Evidence from Human Trajectory Data in Wuhan City," IJERPH, MDPI, vol. 18(9), pages 1-27, April.
    4. Rehana Shrestha & Klaus Telkmann & Benjamin Schüz & Pramesh Koju & Reshma Shrestha & Biraj Karmacharya & Gabriele Bolte, 2022. "Measuring Environmental Justice in Real Time: A Pilot Study Using Digital Participatory Method in the Global South, Nepal," IJERPH, MDPI, vol. 19(8), pages 1-21, April.
    5. Qianqian Liu & Guanpeng Dong & Wenzhong Zhang & Jiaming Li, 2022. "The Influence of Air Pollution on Happiness and Willingness to Pay for Clean Air in the Bohai Rim Area of China," IJERPH, MDPI, vol. 19(9), pages 1-13, May.
    6. Jingwen Rao & Jing Ma & Yanwei Chai, 2023. "Comparing Mobility-Based PM 2.5 Concentrations and Activity Satisfaction in Beijing between 2012 and 2017," IJERPH, MDPI, vol. 20(2), pages 1-13, January.
    7. Shakhaoat Hossain & Wenwei Che & Alexis Kai-Hon Lau, 2022. "Inter- and Intra-Individual Variability of Personal Health Risk of Combined Particle and Gaseous Pollutants across Selected Urban Microenvironments," IJERPH, MDPI, vol. 19(1), pages 1-19, January.
    8. Tao, Yinhua & Chai, Yanwei & Zhang, Xue & Yang, Jie & Kwan, Mei-Po, 2021. "Mobility-based environmental justice: Understanding housing disparity in real-time exposure to air pollution and momentary psychological stress in Beijing, China," Social Science & Medicine, Elsevier, vol. 287(C).

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