Contrasting the cloud condensing properties of aerosol particles measured with HTDMA, CCNC and CRDS to their chemical composition measured with HR-AMS on board the R/V Atlantis during the Calnex 2010 campaign
Abstract
In this study we contrast the cloud condensing properties of aerosols determined with three different methods to their chemical composition. A Volatility-Hygroscopicity Tandem Differential Mobility Analyzer (VHTDMA) measured the volatility and hygroscopicity of aerosol particles of a certain diameter in a constant relative humidity, a Cloud Condensation Nucleus Counter (CCNC) measured the particle activation in different supersaturation conditions, a Cavity Ring Down Spectrometer (CRDS) measured the laser beam extinction in dry and humidified aerosol and a High Resolution Aerosol Mass Spectrometer (HR-AMS) measured the size resolved chemical composition of aerosol particles. Based on these experimental data, we calculated and compared the kappa-values, which gives a single parameter representation of hygroscopic growth and cloud condensation nucleus activity. All of the instruments were deployed on board the R/V Atlantis during the Calnex 2010 campaign from May 15th to June 8th. During this period, different aerosol types were encountered from clean marine aerosol to highly polluted urban aerosol.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.A44B..06H
- Keywords:
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- 0305 ATMOSPHERIC COMPOSITION AND STRUCTURE / Aerosols and particles;
- 0320 ATMOSPHERIC COMPOSITION AND STRUCTURE / Cloud physics and chemistry