US EPA

3221935 

Journal Article 

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

Grönholm, T; Aalto, PP; Hiltunen, V; Rannik, Ü; Rinne, J; Laakso, L; Hyvönen, S; Vesala, T; Kulmala, M 

2007 

1 

Tellus. Series B, Chemical and Physical Meteorology
ISSN: 0280-6509
EISSN: 1600-0889 

59 

3 

381-386 

10.1111/j.1600-0889.2007.00268.x 

WOS:000247174300006 

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.