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
Factors influencing the contribution of ion-induced nucleation in a boreal forest, Finland
Atmospheric Chemistry and Physics, Volume 10, No. 8, Year 2010
Notification
URL copied to clipboard!
Description
We present the longest series of measurements so far (2 years and 7 months) made with an Ion-DMPS at the SMEAR II measurement station in HyytiÃCurrency signlãCurrency sign, Southern Finland. We show that the classification into overcharged (implying some participation of ion-induced nucleation) and undercharged (implying no or very little participation of ion-induced nucleation) days, based on Ion-DMPS measurements, agrees with the fraction of ion-induced nucleation based on NAIS measurements. Those classes are based on the ratio of ambient charged particle to steady-state charged particle concentration, known as the charging state. We analyzed the influence of different parameters on the contribution of ion-induced nucleation to the total particle formation rate. We found that the fraction of ion-induced nucleation is typically higher on warmer, drier and sunnier days compared to colder days with less solar radiation and a higher relative humidity. Also, we observed that bigger concentrations of new particles were produced on days with a smaller fraction of ion-induced nucleation. Moreover, sulfuric acid saturation ratios were smaller for days with a bigger fraction of ion-induced nucleation. Finally, we propose explanations on how these different parameters could influence neutral and ion-induced nucleation, and show that the different mechanisms seem to take place at the same time during an event. For example, we propose that these observed differences could be due to high temperature and low vapors' saturation ratios (water and sulfuric acid) increasing the height of the energy barrier a particle has to reach before it can grow and thus limiting neutral nucleation. © 2010 Author(s).
Authors & Co-Authors
Gagné, Stéphanie
Finland, Helsinki
Helsingin Yliopisto
Nieminen, Tuomo
Finland, Helsinki
Helsingin Yliopisto
Kurtén, Theo
Finland, Helsinki
Helsingin Yliopisto
Denmark, Copenhagen
Københavns Universitet
Manninen, Hanna Elina
Finland, Helsinki
Helsingin Yliopisto
Petäj̈, T.
Finland, Helsinki
Helsingin Yliopisto
Laakso, Lauri
Finland, Helsinki
Helsingin Yliopisto
South Africa, Potchefstroom
North-west University
Kerminen, Veli Matti
Finland, Helsinki
Helsingin Yliopisto
Finland, Helsinki
Finnish Meteorological Institute
Boy, Michael
Finland, Helsinki
Helsingin Yliopisto
Kulmala, Markku
Finland, Helsinki
Helsingin Yliopisto
Sweden, Stockholm
Stockholms Universitet
Statistics
Citations: 48
Authors: 9
Affiliations: 5
Identifiers
Doi:
10.5194/acp-10-3743-2010
ISSN:
16807316
e-ISSN:
16807324
Research Areas
Cancer
Environmental
Study Approach
Qualitative