A synthesis of cloud condensation nuclei counter (CCNC) measurements within the EUCAARI network
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Autor:innen
Paramonov, Mikhail
Kerminen, Veli-Matti
Aalto, P. P.
Andreae, Meinrat O.
Asmi, Eija
Baltensperger, Urs
Bougiatioti, Aikaterini
Brus, David
Frank, Göran
Autor:in (Körperschaft)
Publikationsdatum
2015
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Atmospheric Chemistry and Physics
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
15
Ausgabe / Nummer
21
Seiten / Dauer
12211–12229
Patentnummer
Verlag / Herausgebende Institution
Copernicus
Verlagsort / Veranstaltungsort
Göttingen
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Cloud condensation nuclei counter (CCNC) measurements performed at 14 locations around the world within the European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) framework have been analysed and discussed with respect to the cloud condensation nuclei (CCN) activation and hygroscopic properties of the atmospheric aerosol. The annual mean ratio of activated cloud condensation nuclei (NCCN) to the total number concentration of particles (NCN), known as the activated fraction A, shows a similar functional dependence on supersaturation S at many locations – exceptions to this being certain marine locations, a free troposphere site and background sites in south-west Germany and northern Finland. The use of total number concentration of particles above 50 and 100 nm diameter when calculating the activated fractions (A50 and A100, respectively) renders a much more stable dependence of A on S; A50 and A100 also reveal the effect of the size distribution on CCN activation. With respect to chemical composition, it was found that the hygroscopicity of aerosol particles as a function of size differs among locations. The hygroscopicity parameter κ decreased with an increasing size at a continental site in south-west Germany and fluctuated without any particular size dependence across the observed size range in the remote tropical North Atlantic and rural central Hungary. At all other locations κ increased with size. In fact, in Hyytiälä, Vavihill, Jungfraujoch and Pallas the difference in hygroscopicity between Aitken and accumulation mode aerosol was statistically significant at the 5 % significance level. In a boreal environment the assumption of a size-independent κ can lead to a potentially substantial overestimation of NCCN at S levels above 0.6 %. The same is true for other locations where κ was found to increase with size. While detailed information about aerosol hygroscopicity can significantly improve the prediction of NCCN, total aerosol number concentration and aerosol size distribution remain more important parameters. The seasonal and diurnal patterns of CCN activation and hygroscopic properties vary among three long-term locations, highlighting the spatial and temporal variability of potential aerosol–cloud interactions in various environments.
Schlagwörter
Fachgebiet (DDC)
620 - Ingenieurwissenschaften und Maschinenbau
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
1680-7324
1680-7316
1680-7316
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Gold
Lizenz
Zitation
PARAMONOV, Mikhail, Veli-Matti KERMINEN, Martin GYSEL, P. P. AALTO, Meinrat O. ANDREAE, Eija ASMI, Urs BALTENSPERGER, Aikaterini BOUGIATIOTI, David BRUS, Göran FRANK, N. GOOD, Sachin S. GUNTHE, Liqing HAO, M. IRWIN, A. JAATINEN, Zsófia JURÁNYI, S. M. KING, A. KORTELAINEN, Adam KRISTENSSON, Heikki LIHAVAINEN, Markku KULMALA, Ulrike LOHMANN, Scot T. MARTIN, Gordon MCFIGGANS, Nikolaos MIHALOPOULOS, Athanasios NENES, Colin O’DOWD, Jurgita OVADNEVAITE, Tuukka PETÄJÄ, Ulrich PÖSCHL, Greg ROBERTS, D. ROSE, Brigitta SVENNINGSSON, Erik SWIETLICKI, Ernest WEINGARTNER, James WHITEHEAD, Alfred WIEDENSOHLER, Cerina WITTBOM und Berko SIERAU, 2015. A synthesis of cloud condensation nuclei counter (CCNC) measurements within the EUCAARI network. Atmospheric Chemistry and Physics. 2015. Bd. 15, Nr. 21, S. 12211–12229. DOI 10.5194/acp-15-12211-2015. Verfügbar unter: https://doi.org/10.26041/fhnw-8076