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Original Research Papers

Measurements of aerosol particle dry deposition velocity using the relaxed eddy accumulation technique

Authors:

Tiia Grönholm ,

Department of Physical Sciences, University of Helsinki, FI
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Pasi P. Aalto,

Department of Physical Sciences, University of Helsinki, FI
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Veijo Hiltunen,

Department of Physical Sciences, University of Helsinki, FI
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Üllar Rannik,

Department of Physical Sciences, University of Helsinki, FI
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Janne Rinne,

Department of Physical Sciences, University of Helsinki, FI
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Lauri Laakso,

Department of Physical Sciences, University of Helsinki, FI
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Saara Hyvönen,

Department of Computer Science, University of Helsinki, FI
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Timo Vesala,

Department of Physical Sciences, University of Helsinki, FI
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Markku Kulmala

Department of Physical Sciences, University of Helsinki, FI
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Abstract

The continuous measurements of aerosol particle deposition velocity have been performed from January 2004 to January 2005 using a REA technique with dynamic deadband.We measured aerosol particle deposition velocity in the size range of 10–150 nanometer with 5–10 nanometer steps using differential mobility analyser for sizing. We were able to measure two size classes simultaneously. One size class was changed at one month intervals, another we kept constant at 30 nm to investigate the effect of seasonal and meteorological variation on deposition velocity. We found that the 80–100 nanometer size particles had the lowest deposition velocity, about 0.4 cm s-1. Deposition velocity increased with decreasing or increasing particle diameter from 80–100 nanometer size. We also found that deposition velocity increases as a function of friction velocity.

How to Cite: Grönholm, T., Aalto, P.P., Hiltunen, V., Rannik, Ü., Rinne, J., Laakso, L., Hyvönen, S., Vesala, T. and Kulmala, M., 2007. Measurements of aerosol particle dry deposition velocity using the relaxed eddy accumulation technique. Tellus B: Chemical and Physical Meteorology, 59(3), pp.381–386. DOI: http://doi.org/10.1111/j.1600-0889.2007.00268.x
  Published on 01 Jan 2007
 Accepted on 11 Dec 2006            Submitted on 10 May 2006

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