Technical note: Use of PM<sub>2.5</sub> to CO ratio as an indicator of wildfire smoke in urban areas

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Abstract 2.5 to CO emission ratios between smoke and typical urban pollution. For temperate wildfires, the mean emission ratio of PM2.5 to CO is in the range of 0.14–0.18 g PM2.5  g CO- 1 2.5 to CO emissions ratio that is lower by a factor of 2–20. This gives rise to the possibility of using this ratio as an indicator of wildfire smoke. We use observations at a regulatory surface monitoring site in Sparks, NV, for the period of May–September 2018–2021. There were many smoke-influenced periods from numerous California wildfires that burned during this period. Using a PM2.5  /µ g m - 3 ppm - 1, we can split the observations into smoke-influenced and no-smoke periods. We then develop a Monte Carlo simulation, tuned to local conditions, to derive a set of PM2.5  /µ g m - 3 ppm - 1 best fits the observations, which is significantly lower than the ratio observed in fresh smoke plumes (e.g., 200–300 µ g m - 3 ppm - 1). The most likely explanation for this difference is loss of PM2.5 during dilution and transport to warmer surface layers. We find that the PM2.5  /2.5 and O3. Using the results of our Monte Carlo simulation, this ratio can also quantify the influence of smoke on urban PM2.5.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Technical note: Use of PM2.5 to CO ratio as an indicator of wildfire smoke in urban areas ; volume:22 ; number:18 ; year:2022 ; pages:12695-12704 ; extent:10
Atmospheric chemistry and physics ; 22, Heft 18 (2022), 12695-12704 (gesamt 10)

Classification
Soziale Probleme, Sozialdienste, Versicherungen

Creator
Jaffe, Daniel A.
Schnieder, Brendan
Inouye, Daniel

DOI
10.5194/acp-22-12695-2022
URN
urn:nbn:de:101:1-2022100605272911100052
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
15.08.2025, 7:38 AM CEST

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Associated

  • Jaffe, Daniel A.
  • Schnieder, Brendan
  • Inouye, Daniel

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