Towards a hygroscopic growth calibration for low-cost PM<sub>2.5</sub> sensors
Abstract 2.5 mass concentration measurements. We use 2 years of measurements from the Berkeley Environmental Air-quality and CO2 Network sensors deployed in San Francisco and Los Angeles in our analysis. The calibration uses a hygroscopic growth correction factor derived from κ ∼ 40 % from the uncalibrated data and maintains a mean bias much smaller than the EPA national calibration scheme (- 0.90 vs - 2.73 µ g m- 3). We also find that calibration parameters forecasted beyond those fit with the EPA reference data continue to outperform the uncalibrated data and EPA calibration data, enabling real-time application of the calibration scheme even in the absence of reference data. While the correction greatly improves the data accuracy, non-Gaussian distribution of the residuals suggests that other processes besides hygroscopic growth can be parameterized for future improvement of this calibration.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Towards a hygroscopic growth calibration for low-cost PM2.5 sensors ; volume:17 ; number:3 ; year:2024 ; pages:1051-1060 ; extent:10
Atmospheric measurement techniques ; 17, Heft 3 (2024), 1051-1060 (gesamt 10)
- Creator
- DOI
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10.5194/amt-17-1051-2024
- URN
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urn:nbn:de:101:1-2024021503203827053918
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:35 AM CEST
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Associated
- Patel, Milan Y.
- Vannucci, Pietro F.
- Kim, Jinsol
- Berelson, William M.
- Cohen, Ronald Carl
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