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Aerosol-Cloud Interactions in the Lower Free Troposphere as Measured at the High Alpine Research Station Jungfraujoch in Switzerland

Weingartner, Ernest und Verheggen, Bart und Cozic, Julie und Gysel, Martin und Sjorgen, Staffan und Duplissy, Jonathan und Lohmann, Ulrike und Mertes, Stefan und Bower, Keith N. und Flynn, Michael und Connolly, Paul und Crosier, Jonathan und Gallagher, Martin und Coe, Hugh und Choularton, Tom und Walter, Saskia und Schneider, Johannes und Curtius, Joachim und Borrmann, Stephan und Petzold, Andreas und Ebert, Martin und Inerle-Hof, M. und Worringen, A. und Weinbruch, Stephan und Fries, E. und Starokozhev, Elena und Püttmann, Wilhelm und Jaeschke, Wolfgang und Vana, M. und Hirsikko, A. und Tamm, E. und Aalto, P. und Kulmala, Markku (2006) Aerosol-Cloud Interactions in the Lower Free Troposphere as Measured at the High Alpine Research Station Jungfraujoch in Switzerland. In: 2006 International Aerosol Conference. 2006 International Aerosol Conference, 2006-09-10 - 2006-09-15, St Paul, MN (USA).

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Kurzfassung

Within the WMO Global Atmosphere Watch (GAW) program continuous measurements of aerosol parameters have been performed at the Jungfraujoch high Alpine site since 1988. This measurement site is located on an exposed mountain col in the Bernese Alps, Switzerland, at 3580 meters altitude. Throughout the year the station is within clouds about 40% of the time. In warm months, the site is influenced by injection of planetary boundary layer air into the free troposphere during sunny afternoons due to thermal convection, while in winter it is usually in the undisturbed free troposphere. Several intensive field studies, named CLACE (Cloud and Aerosol Characterization Experiment), have been performed in both summer and winter within international collaborations. State-of-the-art instrumentation is employed to characterize the aerosol size distribution (Scanning Mobility Particle Sizer, SMPS; Optical Particle Counter, OPC). The University of Manchester and the Max Planck Institute in Mainz operated two Aerodyne Aerosol Mass Spectrometers (AMS) to measure the size segregated chemical composition. Other measured parameters were the hygroscopic properties of the particles (Hygroscopicity Tandem Differential Mobility Analyzer, H-TDMA), cloud microphysics (Particulate Volume Monitor, PVM; Forward Scattering Spectrometer Probe, FSSP; Cloud Particle Imager, CPI), and particle morphology (Environmental Scanning Electron Microscope, ESEM). An Air Ion Spectrometer (AIS) and an outdoor SMPS were also employed. The latter two instruments are especially well suited to measure nanometer sized particles (charged particles and sum of neutral and charged particles, respectively) in order to elucidate their formation mechanisms and rates. Different inlets are used for these instruments: A heated inlet (25°C) designed to prevent ice build-up and to evaporate cloud particles at an early stage, ensuring that the cloud condensation nuclei and/or ice nuclei are also sampled. This is called the total inlet. An interstitial inlet operated with a PM2 cyclone impactor removed all cloud droplets and ice crystals from the ambient air. Within a cloud the sampled air thus represents the interstitial (or unactivated) aerosol fraction. In addition, the Institute for Tropospheric Research (IFT) operated a Counterflow Virtual Impactor (CVI, Mertes et al., 2005). The CVI was part of a new prototype sampling system (Ice-CVI) that allows for the separation of small ice particles from large ice crystals, cloud droplets and interstitial aerosol particles. The extracted ice particles are dried airborne in the system and the remaining residual particles which correspond to the former ice nuclei were analyzed with a variety of different instruments. Differencing the response downstream of the different inlets provides insight in the fractionation of aerosol particles between the cloud phase and the interstitial phase.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Aerosol-Cloud Interactions in the Lower Free Troposphere as Measured at the High Alpine Research Station Jungfraujoch in Switzerland
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Weingartner, ErnestPaul Scherrer Inst., Villigen PSI, CH
Verheggen, BartPaul Scherrer Inst., Villigen PSI, CH
Cozic, JuliePaul Scherrer Inst., Villigen PSI, CH
Gysel, MartinPaul Scherrer Inst., Villigen PSI, CH
Sjorgen, StaffanPaul Scherrer Inst., Villigen PSI, CH
Duplissy, JonathanPaul Scherrer Inst., Villigen PSI, CH
Lohmann, UlrikeETH Zürich, Zürich, CH
Mertes, StefanLeibniz-Inst. for Tropospheric Research, Leipzig
Bower, Keith N.Univ. of Manchester, Manchester, UK
Flynn, MichaelUniv. of Manchester, Manchester, UK
Connolly, PaulUniv. of Manchester, Manchester, UK
Crosier, JonathanUniv. of Manchester, Manchester, UK
Gallagher, MartinUniv. of Manchester, Manchester, UK
Coe, HughUniv. of Manchester, Manchester, UK
Choularton, TomUniv. of Manchester, Manchester, UK
Walter, SaskiaMPI for Chemistry, Mainz
Schneider, JohannesMPI for Chemistry, Mainz
Curtius, JoachimMPI for Chemistry, Mainz
Borrmann, StephanMPI for Chemistry, Mainz
Petzold, AndreasNICHT SPEZIFIZIERT
Ebert, MartinTU Darmstadt, Darmstadt
Inerle-Hof, M.TU Darmstadt, Darmstadt
Worringen, A.TU Darmstadt, Darmstadt
Weinbruch, StephanTU Darmstadt, Darmstadt
Fries, E.Johann Wolfgang Goethe Univ., Frankfurt am Main
Starokozhev, ElenaJohann Wolfgang Goethe Univ., Frankfurt am Main
Püttmann, WilhelmJohann Wolfgang Goethe Univ., Frankfurt am Main
Jaeschke, WolfgangJohann Wolfgang Goethe Univ., Frankfurt am Main
Vana, M.Univ. of Helsinki, Helsinki, FIN
Hirsikko, A.Univ. of Helsinki, Helsinki, FIN
Tamm, E.Univ. of Tartu, Tartu, EST
Aalto, P.Univ. of Helsinki, Helsinki, FIN
Kulmala, MarkkuUniv. of Helsinki, Helsinki, FIN
Datum:September 2006
Erschienen in:2006 International Aerosol Conference
Referierte Publikation:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Cloud/Fog Aerosol Interactions, Atmospheric Nucleation, Measurement Campaigns
Veranstaltungstitel:2006 International Aerosol Conference
Veranstaltungsort:St Paul, MN (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-09-10 - 2006-09-15
Veranstalter :International Aerosol Research Assembly
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:V UR - Schonung von Umwelt und Ressourcen (alt)
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V UR - Schonung von Umwelt und Ressourcen
DLR - Teilgebiet (Projekt, Vorhaben):V - Umweltwirkungen des Verkehrs (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Dr.rer.nat. Andreas Petzold
Hinterlegt am:02 Jul 2007
Letzte Änderung:12 Dez 2013 20:25

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