Summertime high resolution variability of atmospheric formaldehyde and non-methane volatile organic compounds in a rural background area

On rural background areas atmospheric formaldehyde (HCHO) is important for its abundance and chemical reactivity, directly linked to the tropospheric ozone formation processes. HCHO is also toxic and carcinogenic to humans. Atmospheric HCHO was continuously measured in summer 2016 during 81 days (N ...

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Bibliographic Details
Published in:The Science of the total environment 2019-01, Vol.647, p.862-877
Main Authors: de Blas, Maite, Ibáñez, Pablo, García, Jose Antonio, Gómez, Maria Carmen, Navazo, Marino, Alonso, Lucio, Durana, Nieves, Iza, Jon, Gangoiti, Gotzon, de Cámara, Estíbaliz Sáez
Format: Article
Language:English
Subjects:
Biogenic Volatile Organic Compounds (BVOCs)
Formaldehyde
Hantzsch fluorimetry
Non methane hydrocarbons (NMHC)
Rural background
Tropospheric ozone
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Summary:On rural background areas atmospheric formaldehyde (HCHO) is important for its abundance and chemical reactivity, directly linked to the tropospheric ozone formation processes. HCHO is also toxic and carcinogenic to humans. Atmospheric HCHO was continuously measured in summer 2016 during 81 days (N = 6722, average: 1.42 ppbv) in a rural background area in Northern Spain, Valderejo Natural Park (VNP) using a Hantzsch fluorimetric system. To better characterize the photochemical processes the database was completed with hourly measurements of 63 Non-Methane Hydrocarbons (NMHC) performed by gas chromatography and other common atmospheric pollutants and meteorological parameters. HCHO mixing ratios were highly correlated with ozone and isoprene. Cloudy and rainy days, with low temperature and radiation, led to low HCHO mixing ratios, with maxima (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2018.07.411