Articles | Volume 17, issue 7
https://doi.org/10.5194/amt-17-1979-2024
https://doi.org/10.5194/amt-17-1979-2024
Research article
 | 
08 Apr 2024
Research article |  | 08 Apr 2024

Evaluation of Aeris mid-infrared absorption (MIRA), Picarro CRDS (cavity ring-down spectroscopy) G2307, and dinitrophenylhydrazine (DNPH)-based sampling for long-term formaldehyde monitoring efforts

Asher P. Mouat, Zelda A. Siegel, and Jennifer Kaiser

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Latest update: 15 Nov 2024
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Short summary
Three fast-measurement formaldehyde monitors were deployed at two field sites in Atlanta, GA, over 1 year. Four different zeroing methods were tested to develop an optimal field setup as well as procedures for instrument calibration. Observations agreed well after calibration but were much higher compared to the TO-11A monitoring method, which is the golden standard. Historical HCHO concentrations were compared with measurements in this work, showing a 22 % reduction in midday HCHO since 1999.