Articles | Volume 14, issue 6
Atmos. Meas. Tech., 14, 4617–4637, 2021
https://doi.org/10.5194/amt-14-4617-2021
Atmos. Meas. Tech., 14, 4617–4637, 2021
https://doi.org/10.5194/amt-14-4617-2021

Research article 22 Jun 2021

Research article | 22 Jun 2021

Development and application of a United States-wide correction for PM2.5 data collected with the PurpleAir sensor

Karoline K. Barkjohn et al.

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Latest update: 21 Sep 2021
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Short summary
Although widely used, air sensor measurements are often biased. In this work we develop a correction with a relative humidity term that reduces the bias and improves consistency between different United States regions. This correction equation, along with proposed data cleaning criteria, has been applied to PurpleAir PM2.5 measurements across the US on the AirNow Fire and Smoke Map and has the potential to be successfully used in other air quality and public health applications.