Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Using measurements of the aerosol charging state in determination of the particle growth rate and the proportion of ion-induced nucleation
Atmospheric Chemistry and Physics, Volume 13, No. 1, Year 2013
Notification
URL copied to clipboard!
Description
The fraction of charged nucleation mode particles as a function of particle diameter depends on the particle growth rate and the proportion of particles formed via ion-induced nucleation. In this study we have tested the applicability of recent data analysis methods to determine the growth rate and the proportion of ion-induced nucleation from the measured charged fractions. For this purpose we have conducted a series of aerosol dynamic simulations covering a wide range of atmospheric conditions. The growth rate and initial fraction of charged particles were estimated from simulated data using these methods and compared with the values obtained directly from the simulations. We found that the data analysis methods used in this study should not be used when the nuclei growth rate is less than ∼3 nm h-1, or when charged particles grow much more rapidly than neutral ones. Furthermore, we found that the difference in removal rates of neutral and charged particles should be taken into account when estimating the proportion of ion-induced nucleation. Neglecting the higher removal rate of charged particles compared with that of neutral ones could result in an underestimation of the proportion of ion-induced nucleation by up to a factor of 2. This underestimation is further increased if charged particles grow more rapidly than neutral ones. We also provided a simple way of assessing whether these methods are suitable for analyzing data measured under specific conditions. The assessment procedure was illustrated using a few examples of actual measurement sites with a more detailed examination of the typical conditions observed at the SMEAR II station in Hyytiälä, Finland. © 2013 Author(s).
Authors & Co-Authors
Leppä, J.
Finland, Helsinki
Finnish Meteorological Institute
Gagné, Stéphanie
Finland, Helsinki
Helsingin Yliopisto
Canada, Halifax
Dalhousie University
Canada, Gatineau
Environment and Climate Change Canada
Laakso, Lauri
Finland, Helsinki
Finnish Meteorological Institute
Finland, Helsinki
Helsingin Yliopisto
South Africa, Potchefstroom
North-west University
Manninen, Hanna Elina
Finland, Helsinki
Helsingin Yliopisto
J. Lehtinen, K. E.
Finland, Kuopio
Itä-suomen Yliopisto
Kulmala, Markku
Finland, Helsinki
Helsingin Yliopisto
Kerminen, Veli Matti
Finland, Helsinki
Helsingin Yliopisto
Statistics
Citations: 10
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.5194/acp-13-463-2013
ISSN:
16807316
e-ISSN:
16807324