Size distribution and new particle formation in subtropical Eastern Australia
Guo, Hai, Ding, Aijun, Morawska, Lidia, He, Congrong, Ayoko, Godwin A., Li, Yok-sheung, & Hung, Wing-Tat (2008) Size distribution and new particle formation in subtropical Eastern Australia. Environmetnal Chemistry, 5(6), pp. 382-390.
An intensive measurement campaign of particle concentrations, nitrogen oxides and meteorological parameters was conducted at a rural site in subtropical Eastern Australia during September 2006. The aim of this work was to develop an understanding of the formation and growth processes of atmospheric aerosols, and the size distributions under various meteorological conditions. In order to achieve this, the origins of air arriving at the site were explored using back trajectories cluster analysis and the diurnal patterns of particle number concentration and size distribution for the classified air masses were investigated. The study showed that photochemical formation of nucleation mode particles and their consequent growth was often observed. Further, the nucleation mode usually dominated the size distribution and concentration of the photochemical event in the first 3-4 hours with a geometric mean diameter of 26.9 nm and a geometric standard deviation of 1.28. The average particle growth rate was estimated to be 1.6 nm h-1, which is lower than that observed at urban sites, but comparable to the values reported in clean environments. The potential precursors of the photochemical events are also discussed.
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|Item Type:||Journal Article|
|Keywords:||New PArticle Formation, Particle Growth Rate, Particle Size Distribution, Photochemical Event, Back Trajectory|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)|
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Aerosols (040101)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
Past > Schools > School of Physical & Chemical Sciences
|Copyright Owner:||Copyright 2008 CSIRO Publishing|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher|
|Deposited On:||22 Dec 2008 08:35|
|Last Modified:||29 Feb 2012 23:50|
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