Abstracts & Presentations

Using a Centrifugal Particle Mass Analyser with a Single Particle Soot Photometer to constrain black carbon optical properties

J D Allan, D Liu, J Whitehead, M R Alfarra, P I Williams, J W Taylor, M J Flynn, G McFiggans and H Coe
Focus Meeting 8 – Recent Advances in Aerosol Measurement Technology

Here we present a method of combining a Single Particle Soot Photometer (SP2) with a Centrifugal Particle Mass Analyser (CPMA) to provide quantitative data on the black carbon (BC) content and optical properties of real-world soot aerosols from a diesel engine and ambient measurements in Manchester. The relationship between these is highly important when attempting to assess the influence of soot particles on weather and climate in the atmosphere. Here we present evidence that a hybrid model should be used when attempting to simulate the so-called ‘lensing’ effect of the non-BC material, which would reconcile some of the seemingly contradictory evidence from field measurements.

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