Capturing The Spatiotemporal Variability Of Fine
Particulates In Travel Microenvironments Using
GPS Technology
Author(s)
S. P. Greaves
Abstract
While it is an area of ongoing epidemiological debate, evidence is growing that
repeated short-term exposures to elevated levels of fine airborne particulate
matter (PM2.5) are a serious public health concern. Transport microenvironments
have received particular scrutiny both because of the higher levels of fine
particulates associated with road traffic and the fact people spend a significant
amount of time traveling (for instance, 80 minutes/day for residents of Sydney).
While several small-scale studies have been completed recently to establish the
main factors impacting PM2.5 exposure, available measurement methods restrict
sampling to coarse intervals such as every 30 minutes or by trip. While this
provides an indication of total exposure across the sampling interval, it is not
able to provide data at the level of time-resolution required to identify peak
excursions in PM2.5 within a journey or associate this with specific elements of
that journey such as traveling through a tunnel, idling in heavy traffic, or
traveling behind a diesel truck. With this in mind, the current paper reports on a
recent study in which the capabilities of a personal Global Positioning System
(GPS) device and portable aerosol monitor are combined to collect these data on
a variety of transportation modes in Sydney. This ability to easily collect, report
and analyse pollution data at a highly disaggregate temporal and spatial level
provides a flexible and powerful tool for identifying intra-trip variability in
pollution levels as well as the location and magnitude of peak exposures of
PM2.5.
Keywords: GPS, personal exposure, fine particulates, travel microenvironments.
Keywords
GPS, personal exposure, fine particulates, travel microenvironments.
Related Book
Other papers in this volume
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