Wildfire smoke impacts on indoor air quality assessed using crowdsourced data in California
Wildfires have become an important source of particulate matter (PM < 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western United States. Since people mainly shelter indoors during wildfire smoke events, the infiltration of wildfire PM into indoor environments is a...
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| Vydáno v: | Proceedings of the National Academy of Sciences - PNAS Ročník 118; číslo 36 |
|---|---|
| Hlavní autoři: | , , , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
United States
07.09.2021
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| Témata: | |
| ISSN: | 1091-6490, 1091-6490 |
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| Abstract | Wildfires have become an important source of particulate matter (PM
< 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western United States. Since people mainly shelter indoors during wildfire smoke events, the infiltration of wildfire PM
into indoor environments is a key determinant of human exposure and is potentially controllable with appropriate awareness, infrastructure investment, and public education. Using time-resolved observations outside and inside more than 1,400 buildings from the crowdsourced PurpleAir sensor network in California, we found that the geometric mean infiltration ratios (indoor PM
of outdoor origin/outdoor PM
) were reduced from 0.4 during non-fire days to 0.2 during wildfire days. Even with reduced infiltration, the mean indoor concentration of PM
nearly tripled during wildfire events, with a lower infiltration in newer buildings and those utilizing air conditioning or filtration. |
|---|---|
| AbstractList | Wildfires have become an important source of particulate matter (PM2.5 < 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western United States. Since people mainly shelter indoors during wildfire smoke events, the infiltration of wildfire PM2.5 into indoor environments is a key determinant of human exposure and is potentially controllable with appropriate awareness, infrastructure investment, and public education. Using time-resolved observations outside and inside more than 1,400 buildings from the crowdsourced PurpleAir sensor network in California, we found that the geometric mean infiltration ratios (indoor PM2.5 of outdoor origin/outdoor PM2.5) were reduced from 0.4 during non-fire days to 0.2 during wildfire days. Even with reduced infiltration, the mean indoor concentration of PM2.5 nearly tripled during wildfire events, with a lower infiltration in newer buildings and those utilizing air conditioning or filtration.Wildfires have become an important source of particulate matter (PM2.5 < 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western United States. Since people mainly shelter indoors during wildfire smoke events, the infiltration of wildfire PM2.5 into indoor environments is a key determinant of human exposure and is potentially controllable with appropriate awareness, infrastructure investment, and public education. Using time-resolved observations outside and inside more than 1,400 buildings from the crowdsourced PurpleAir sensor network in California, we found that the geometric mean infiltration ratios (indoor PM2.5 of outdoor origin/outdoor PM2.5) were reduced from 0.4 during non-fire days to 0.2 during wildfire days. Even with reduced infiltration, the mean indoor concentration of PM2.5 nearly tripled during wildfire events, with a lower infiltration in newer buildings and those utilizing air conditioning or filtration. Wildfires have become an important source of particulate matter (PM < 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western United States. Since people mainly shelter indoors during wildfire smoke events, the infiltration of wildfire PM into indoor environments is a key determinant of human exposure and is potentially controllable with appropriate awareness, infrastructure investment, and public education. Using time-resolved observations outside and inside more than 1,400 buildings from the crowdsourced PurpleAir sensor network in California, we found that the geometric mean infiltration ratios (indoor PM of outdoor origin/outdoor PM ) were reduced from 0.4 during non-fire days to 0.2 during wildfire days. Even with reduced infiltration, the mean indoor concentration of PM nearly tripled during wildfire events, with a lower infiltration in newer buildings and those utilizing air conditioning or filtration. |
| Author | Liang, Yutong Sengupta, Deep Apte, Joshua S Goldstein, Allen H Lunderberg, David M Campmier, Mark J |
| Author_xml | – sequence: 1 givenname: Yutong orcidid: 0000-0003-1372-772X surname: Liang fullname: Liang, Yutong email: ahg@berkeley.edu, yutong.liang@berkeley.edu organization: Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720; ahg@berkeley.edu yutong.liang@berkeley.edu – sequence: 2 givenname: Deep orcidid: 0000-0002-5587-6371 surname: Sengupta fullname: Sengupta, Deep organization: Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720 – sequence: 3 givenname: Mark J orcidid: 0000-0001-8614-6470 surname: Campmier fullname: Campmier, Mark J organization: Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720 – sequence: 4 givenname: David M orcidid: 0000-0002-4439-9194 surname: Lunderberg fullname: Lunderberg, David M organization: Department of Chemistry, University of California, Berkeley, CA 94720 – sequence: 5 givenname: Joshua S orcidid: 0000-0002-2796-3478 surname: Apte fullname: Apte, Joshua S organization: School of Public Health, University of California, Berkeley, CA 94720 – sequence: 6 givenname: Allen H orcidid: 0000-0003-4014-4896 surname: Goldstein fullname: Goldstein, Allen H email: ahg@berkeley.edu, yutong.liang@berkeley.edu organization: Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720 |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/34465624$$D View this record in MEDLINE/PubMed |
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| Keywords | biomass burning low-cost PM2.5 sensors exposure indoor air PM2.5 |
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< 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western... Wildfires have become an important source of particulate matter (PM2.5 < 2.5-µm diameter), leading to unhealthy air quality index occurrences in the western... |
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| Title | Wildfire smoke impacts on indoor air quality assessed using crowdsourced data in California |
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