Influence of water uptake on the aerosol particle light scattering coefficients of the Central European aerosol
2014 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 66, 22716- p.Article in journal (Refereed) Published
The influence of aerosol water uptake on the aerosol particle light scattering was examined at the regional continental research site Melpitz, Germany. The scattering enhancement factor f(RH), defined as the aerosol particle scattering coefficient at a certain relative humidity (RH) divided by its dry value, was measured using a humidified nephelometer. The chemical composition and other microphysical properties were measured in parallel. f(RH) showed a strong variation, e.g. with values between 1.2 and 3.6 at RH = 85% and lambda = 550 nm. The chemical composition was found to be the main factor determining the magnitude of f(RH), since the magnitude of f(RH) clearly correlated with the inorganic mass fraction measured by an aerosol mass spectrometer (AMS). Hysteresis within the recorded humidograms was observed and explained by long-range transported sea salt. A closure study using Mie theory showed the consistency of the measured parameters.
Place, publisher, year, edition, pages
2014. Vol. 66, 22716- p.
aerosol particle light scattering, hygroscopic growth, scattering enhancement, aerosol mass spectrometer, field measurements, optical closure study
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-102803DOI: 10.3402/tellusb.v66.22716ISI: 000332837400001OAI: oai:DiVA.org:su-102803DiVA: diva2:713322