Relating hygroscopicity and composition of organic aerosol particulate matter
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Autor:innen
Duplissy, Jonathan
DeCarlo, Peter F.
Dommen, Josef
Alfarra, M. Rami
Metzger, Axel
Barmpadimos, Iakovos
Prevot, Andre S.H.
Tritscher, Torsten
Autor:in (Körperschaft)
Publikationsdatum
10.02.2011
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
11
Ausgabe / Nummer
3
Seiten / Dauer
1155-1165
Patentnummer
Verlag / Herausgebende Institution
Copernicus
Verlagsort / Veranstaltungsort
Göttingen
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
A hygroscopicity tandem differential mobility analyzer (HTDMA) was used to measure the water uptake (hygroscopicity) of secondary organic aerosol (SOA) formed during the chemical and photochemical oxidation of several organic precursors in a smog chamber. Electron ionization mass spectra of the non-refractory submicron aerosol were simultaneously determined with an aerosol mass spectrometer (AMS), and correlations between the two different signals were investigated. SOA hygroscopicity was found to strongly correlate with the relative abundance of the ion signal m/z 44 expressed as a fraction of total organic signal (f44). m/z 44 is due mostly to the ion fragment CO2+ for all types of SOA systems studied, and has been previously shown to strongly correlate with organic O/C for ambient and chamber OA. The analysis was also performed on ambient OA from two field experiments at the remote site Jungfraujoch, and the megacity Mexico City, where similar results were found. A simple empirical linear relation between the hygroscopicity of OA at subsaturated RH, as given by the hygroscopic growth factor (GF) or "ϰorg" parameter, and f44 was determined and is given by ϰorg = 2.2 × f44 − 0.13. This approximation can be further verified and refined as the database for AMS and HTDMA measurements is constantly being expanded around the world. The use of this approximation could introduce an important simplification in the parameterization of hygroscopicity of OA in atmospheric models, since f44 is correlated with the photochemical age of an air mass.
Schlagwörter
Fachgebiet (DDC)
550 - Geowissenschaften
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
Nein
Zukunftsfelder FHNW
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Gold
Lizenz
Zitation
DUPLISSY, Jonathan, Peter F. DECARLO, Josef DOMMEN, M. Rami ALFARRA, Axel METZGER, Iakovos BARMPADIMOS, Andre S.H. PREVOT, Ernest WEINGARTNER, Torsten TRITSCHER, Martin GYSEL, Allison C. AIKEN, Jose L JIMENEZ, Manjula R. CANAGARATNA, Douglas R. WORSNOP, Don R. COLLINS, Jason TOMLINSON und Urs BALTENSPERGER, 2011. Relating hygroscopicity and composition of organic aerosol particulate matter. Atmospheric Chemistry and Physics. 10 Februar 2011. Bd. 11, Nr. 3, S. 1155–1165. DOI 10.5194/acp-11-1155-2011. Verfügbar unter: https://doi.org/10.26041/fhnw-9663