On the efficiency and correction of vertically oriented blunt bioaerosol samplers in moving air

Michel, Dominik and Rotach, Mathias and Gehrig, Regula and Vogt, Roland. (2012) On the efficiency and correction of vertically oriented blunt bioaerosol samplers in moving air. International journal of biometeorology, Vol. 56, H. 6. pp. 1113-1121.

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Official URL: http://edoc.unibas.ch/dok/A6223177

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The aspiration efficiency of vertical and wind-oriented Air-O-Cell samplers was investigated in a field study using the pollen of hazel, sweet chestnut and birch. Collected pollen numbers were compared to measurements of a Hirst-type Burkard spore trap. The discrepancy between pollen counts is substantial in the case of vertical orientation. The results indicate a strong influence of wind velocity and inlet orientation relative to the freestream on the aspiration efficiency. Various studies reported on inertial effects on aerosol motion as function of wind velocity. The measurements were compared to a physically based model for the limited case of vertical blunt samplers. Additionally, a simple linear model based on pollen counts and wind velocity was developed. Both correction models notably reduce the error of vertically oriented samplers, whereas only the physically based model can be used on independent datasets. The study also addressed the precision error of the used instruments, which was substantial for both sampler types.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Meteorologie (Parlow)
UniBasel Contributors:Michel, Dominik and Vogt, Roland
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:27 Feb 2014 15:46
Deposited On:27 Feb 2014 15:46

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