TY  - JOUR
A1  - Sipilä, Mikko
A1  - Lehtipalo, Katrianne
A1  - Junninen, Heikki
A1  - Petäjä, Tuukka
A1  - Kulmala, Markku
A1  - Aalto, Pasi
A1  - Manninen, Hanna Elina
A1  - Kyrö, Ella-Maria
A1  - Asmi, Eija
A1  - Riipinen, Ilona
A1  - Curtius, Joachim
A1  - Kürten, Christoph Andreas
A1  - Borrmann, Stephan
A1  - O'Dowd, Colin D.
T1  - Applicability of condensation particle counters to measure atmospheric clusters
T2  - Atmospheric chemistry and physics
N2  - This study presents an evaluation of a pulse height condensation particle counter (PH-CPC) and an expansion condensation particle counter (E-CPC) in terms of measuring ambient and laboratory-generated molecular and ion clusters. Ambient molecular cluster concentrations were measured with both instruments as they were deployed in conjunction with an ion spectrometer and other aerosol instruments in Hyytiälä, Finland at the SMEAR II station between 1 March and 30 June 2007. The observed cluster concentrations varied and ranged from some thousands to 100 000 cm -3. Both instruments showed similar (within a factor of ~5) concentrations. An average size of the detected clusters was approximately 1.8 nm. As the atmospheric measurement of sub 2-nm particles and molecular clusters is a challenging task, we conclude that most likely we were unable to detect the smallest clusters. Nevertheless, the reported concentrations are the best estimates to date for minimum cluster concentrations in a boreal forest environment.
Y1  - 2008
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/5858
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-58016
SN  - 1680-7316
SN  - 1680-7324
N1  - © Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License.
VL  - 8
SP  - 4049
EP  - 4060
PB  - European Geosciences Union
CY  - Katlenburg-Lindau
ER  -