In situ determination of atmospheric aerosol composition as a function of hygroscopic growth
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Autor:in (Körperschaft)
Publikationsdatum
30.08.2008
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Journal of Geophysical Research: Atmospheres
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
113
Ausgabe / Nummer
D16
Seiten / Dauer
Patentnummer
Verlag / Herausgebende Institution
Wiley
Verlagsort / Veranstaltungsort
Hoboken
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
An in situ measurement setup to determine the chemical composition of aerosols as a function of hygroscopicity is presented. This has been done by connecting a custom‐built Hygroscopicity Tandem Differential Mobility Analyzer (HTDMA) and an Aerosol Time‐of‐Flight Mass Spectrometer (ATOFMS), commercially available from TSI (Model 3800). Single particle bipolar mass spectra from aerosols leaving the HTDMA could thus be obtained as a function of the hygroscopic growth factor. For these studies the HTDMA was set at a relative humidity of 82% and particles with a dry diameter of 260 nm were selected. The setup was first laboratory tested, after which field experiments were performed. Two data sets were obtained during wintertime 2007 in Switzerland: the first in the urban Zurich environment and the other at the remote high alpine research station Jungfraujoch (JFJ). In Zurich, several thousand mass spectra were obtained in less than 2 days of sampling due to a high aerosol loading. At the JFJ, due to low particle concentrations in free tropospheric air masses, a longer sampling period was required. Both in Zurich and at the JFJ, two different growth factor modes were observed. Results from these two locations show that most aerosol particles were a mixture of several compounds. A large contribution of organics and combustion species was found in the less hygroscopic growth mode for both locations. Noncombustion refractory material (e.g., metals, mineral dust, and fly ash) was also highly enhanced in the nonhygroscopic particles. Sulfate, normally considered highly soluble, was found to be a constituent in almost all particles independent of their hygroscopic growth factor.
Schlagwörter
Fachgebiet (DDC)
550 - Geowissenschaften
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
2169-8996
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Nein
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Closed
Lizenz
Zitation
HERICH, Hanna, Lukas KAMMERMANN, Martin GYSEL, Ernest WEINGARTNER, Urs BALTENSPERGER, Ulrike LOHMANN und Daniel J. CZICZO, 2008. In situ determination of atmospheric aerosol composition as a function of hygroscopic growth. Journal of Geophysical Research: Atmospheres. 30 August 2008. Bd. 113, Nr. D16. DOI 10.1029/2008jd009954. Verfügbar unter: https://irf.fhnw.ch/handle/11654/46699