PMID- 29102885
OWN - NLM
STAT- MEDLINE
DCOM- 20180406
LR  - 20181202
IS  - 1873-6424 (Electronic)
IS  - 0269-7491 (Linking)
VI  - 233
DP  - 2018 Feb
TI  - Temporal distribution and other characteristics of new particle formation events 
      in an urban environment.
PG  - 552-560
LID - S0269-7491(17)31988-7 [pii]
LID - 10.1016/j.envpol.2017.10.102 [doi]
AB  - Studying the characteristics of new particle formation (NPF) is important as it 
      is generally recognized as a major contributor to particle pollution in urban 
      environments. We investigated NPF events that occurred during a 1-year period in 
      the urban environment of Brisbane, Australia, using a neutral cluster and air ion 
      spectrometer (NAIS) which is able to monitor both neutral and charged particles 
      and clusters down to a size of 0.8 nm. NPF events occurred on 41% of days, with 
      the occurrence rate of 7% greater in the summer than in the winter. We derived 
      the first diurnal event distribution of NPF events anywhere in the world and 
      showed that the most probable starting time of an NPF event was near 08:30 a.m., 
      being about an hour earlier in the winter than in the summer. During NPF days, 
      10% of particles were charged. The mean neutral and charged particle 
      concentrations on NPF days were, respectively, 49% and 14% higher than those on 
      non-event days. The mean formation rate of 2-3 nm particles during an NPF event 
      was 20.8 cm(-3) s(-1). The formation rate of negatively charged particles was 
      about 10% higher than that of positively charged particles. The mean particle 
      growth rate in the size range up to 20 nm was 6.2 nm h(-1). These results are 
      compared and contrasted with corresponding values that have been derived with the 
      scanning mobility particle sizer (SMPS) at the same location and with values that 
      have been reported with the NAIS at other locations around the world. This is the 
      first comprehensive study of the characteristics of NPF events over a 
      significantly long period in Australia.
CI  - Copyright (c) 2017 Elsevier Ltd. All rights reserved.
FAU - Pushpawela, Buddhi
AU  - Pushpawela B
AD  - International Laboratory for Air Quality and Health, Queensland University of 
      Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
FAU - Jayaratne, Rohan
AU  - Jayaratne R
AD  - International Laboratory for Air Quality and Health, Queensland University of 
      Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
FAU - Morawska, Lidia
AU  - Morawska L
AD  - International Laboratory for Air Quality and Health, Queensland University of 
      Technology, GPO Box 2434, Brisbane, QLD 4001, Australia. Electronic address: 
      l.morawska@qut.edu.au.
LA  - eng
PT  - Journal Article
DEP - 20171105
PL  - England
TA  - Environ Pollut
JT  - Environmental pollution (Barking, Essex : 1987)
JID - 8804476
RN  - 0 (Aerosols)
RN  - 0 (Air Pollutants)
RN  - 0 (Particulate Matter)
SB  - IM
MH  - Aerosols/analysis
MH  - Air Pollutants/*analysis
MH  - Australia
MH  - *Environmental Monitoring
MH  - Particle Size
MH  - Particulate Matter/*analysis
MH  - Seasons
OTO - NOTNLM
OT  - Atmospheric aerosols
OT  - Atmospheric ions
OT  - New particle formation
OT  - Nucleation
EDAT- 2017/11/06 06:00
MHDA- 2018/04/07 06:00
CRDT- 2017/11/06 06:00
PHST- 2017/05/12 00:00 [received]
PHST- 2017/10/25 00:00 [revised]
PHST- 2017/10/25 00:00 [accepted]
PHST- 2017/11/06 06:00 [pubmed]
PHST- 2018/04/07 06:00 [medline]
PHST- 2017/11/06 06:00 [entrez]
AID - S0269-7491(17)31988-7 [pii]
AID - 10.1016/j.envpol.2017.10.102 [doi]
PST - ppublish
SO  - Environ Pollut. 2018 Feb;233:552-560. doi: 10.1016/j.envpol.2017.10.102. Epub 
      2017 Nov 5.