Developing a geostatistical simulation method to inform the quantity and placement of new monitors for a follow-up air sampling campaign

Journal of Exposure Science & Environmental Epidemiology
J D BermanF C Curriero

Abstract

Sampling campaign design is a crucial aspect of air pollution exposure studies. Selection of both monitor numbers and locations is important for maximizing measured information, while minimizing bias and costs. We developed a two-stage geostatistical-based method using pilot NO2 samples from Lanzhou, China with the goal of improving sample design decision-making, including monitor numbers and spatial pattern. In the first step, we evaluate how additional monitors change prediction precision through minimized kriging variance. This was assessed in a Monte Carlo fashion by adding up to 50 new monitors to our existing sites with assigned concentrations based on conditionally simulated NO2 surfaces. After identifying a number of additional sample sites, a second step evaluates their potential placement using a similar Monte Carlo scheme. Evaluations are based on prediction precision and accuracy. Costs are also considered in the analysis. It was determined that adding 28-locations to the existing Lanzhou NO2 sampling campaign captured 73.5% of the total kriged variance improvement and resulted in predictions that were on average within 10.9 μg/m3 of measured values, while using 56% of the potential budget. Additional monitor sites ...Continue Reading

References

Jul 28, 2005·Journal of Exposure Science & Environmental Epidemiology·Zev RossMichael Jerrett
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May 3, 2011·Environmental Research·Keita EbisuMichelle L Bell
Jan 17, 2013·Journal of Exposure Science & Environmental Epidemiology·Thomas D MatteJane E Clougherty
Oct 1, 2013·Environmetrics·Alan E GelfandDavid M Holland
Dec 17, 2014·The Science of the Total Environment·Susanne SteinleHao Wu
Feb 12, 2017·Environmental Research·Anobha GurungMichelle L Bell

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Citations

Feb 16, 2021·Frontiers in Public Health·Karol Baca-LópezEnrique Hernández-Lemus
May 6, 2021·International Journal of Environmental Research and Public Health·Weiwei ZhangYin Ren
Jun 12, 2021·The Annals of Applied Statistics·Joshua L WarrenMichelle L Bell

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