Quantification of source specific black carbon scavenging using an aethalometer and a disdrometer.

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ID: 75746
2019
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Ranked #54 of 145 articles by views in Environmental pollution (Barking, Essex : 1987)

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Abstract
Aerosol black carbon (BC) is the second strongest contributor to global warming, after CO, and it is linked to many adverse health effects. A sampling campaign of 15 months was carried out in León (Spain) in order to evaluate the scavenging of BC with an ensemble aethalometer-disdrometer. The aethalometer provides the concentration of equivalent black carbon (eBC), and the disdrometer, the raindrop size distribution. A total of seventy-five rain events were studied and in 73% of them there was an effective (eBC > eBC) scavenging, with a mean decrease of 48 ± 37% in long rain events (>8 h) and 39 ± 38% in short rain events. The scavenging of BC is strongly related to its source. Thus, the scavenging coefficient (SC) mean value of the BC from fossil fuel (eBC) for short and long rain events was 5.1 10 and 1.3 10 s, respectively. For the BC from biomass burning (eBC), the SC values were 1.6 10 and 2.8 10 s in short and long events, respectively. There was a significant positive correlation between the SC and the number of drops with diameters between 0.375 and 2.5 mm. Rain scavenging of eBC was analyzed depending on the air mass origin obtaining an effective scavenging for air masses from Atlantic, Arctic and Africa. A linear model (R = 0.72) was built to estimate the ΔeBC values with variables from an aethalometer, a disdrometer and a weather station: eBC concentration before rain, swept volume and precipitation accumulated. A Kolmogorov-Smirnov statistical test confirmed the goodness of fit of the model to the measured data.
Reference Key
blancoalegre2019quantificationenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Blanco-Alegre, C;Calvo, A I;Coz, E;Castro, A;Oduber, F;Prévôt, A S H;Močnik, G;Fraile, R;
Journal Environmental pollution (Barking, Essex : 1987)
Year 2019
DOI
S0269-7491(18)33445-6
URL
Keywords
black carbon rainfall wet deposition bc scavenging estimation model raindrop diameter scavenging coefficient

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