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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 19
Atmos. Chem. Phys., 16, 12733–12752, 2016
https://doi.org/10.5194/acp-16-12733-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 16, 12733–12752, 2016
https://doi.org/10.5194/acp-16-12733-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 13 Oct 2016

Research article | 13 Oct 2016

Deriving brown carbon from multiwavelength absorption measurements: method and application to AERONET and Aethalometer observations

Xuan Wang et al.

Data sets

GoAmazon2014/5 campaign, CARES campaign and TCAP campaign ARM http://www.archive.arm.gov/discovery/#v/home/s/

EMEP and NOAA/ESRL site data EBAS http://ebas.nilu.no/

OMAERUV product GES DISC http://disc.sci.gsfc.nasa.gov/Aura/data-holdings/OMI/

AERONET data NASA http://aeronet.gsfc.nasa.gov/

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We describe a new approach to estimate the absorption of brown carbon (BrC) from multiple-wavelength absorption measurements. By applying this method to column and surface observations globally, we find that BrC contributes up to 40 % of the absorption measured at 440 nm. The analysis of two surface sites also suggests that BrC absorptivity decreases with photochemical aging in biomass burning plumes, but not in typical urban conditions.
We describe a new approach to estimate the absorption of brown carbon (BrC) from...
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