Public Lab Research note


Mapping dust hotspots with low-cost monitors

by mathew | April 06, 2016 17:36 | 1,072 views | 0 comments | #12928 | 1,072 views | 0 comments | #12928 06 Apr 17:36

Read more: unstable.publiclab.org/n/12928


What I want to do

Discuss a method for mapping the variability of airborne dust across the landscape. I'm going to summarize the use of passive PM monitors and optical PM monitors outlined in:

Passive sampling to capture spatial variability in PM10–2.5 Darrin K. Ott, Thomas M. Peters, and Naresh Kumar Atmospheric Environment 42 (2008) 746–756

My attempt and results

Ott et al. toured Iowa city taking 6-minute samples with their optical particle counter at over 60 sites over four days in order to create a preliminary map of suspected hotspots. Most spots were visited at least twice:

Screen_Shot_2016-04-06_at_10.17.25_AM.png

They used an analysis of this data to identified the number of passive PM monitors needed and the locations for long-term sampling. passive PM monitors were deployed for three 7-day samples per site.

Screen_Shot_2016-04-06_at_10.18.00_AM.png

The data was suggestive that a rock quarry was the most consistent source of course particles across seasons, while the roadway, a suspected route of exposure, didn't show elevated levels.

Questions and next steps

This methodology is potentially replicable.

Why I'm interested


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