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Evidence for Anthropogenic Organic Aerosols Contributing to Ice Nucleation

Tian, Ping; Liu, Dantong ; Bi, Kai; Huang, Mengyu; Wu, Yangzhou; Hu, Kang; Li, Ruijie; He, Hui; Ding, Deping; Hu, Yaqiong ORCID iD icon 1; Liu, Quan; Zhao, Delong; Qiu, Yan; Kong, Shaofei; Xue, Huiwen
1 Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF), Karlsruher Institut für Technologie (KIT)

Abstract:

The role of organic aerosols (OA) as ice nucleating particles (INPs) deserves attention because of their high atmospheric abundance. The low concentration of INPs poses challenges in identifying the ice nucleation (IN) of OA among a mix of aerosol types in ambient environment. This study coupled a catalytic stripper system (350°C heating) with a continuous flow diffusion chamber to online investigate the immersion INPs of ambient particles at −30°C at a suburban site. Significant reduction (71 ± 25%) of INP concentrations after evaporation suggested that INPs can be significantly contributed by volatile OA. In addition, nonvolatile OA were more efficient INPs than black carbon. Oxygenated OA by photooxidation and lower ambient promoted the IN activity at noon, when the OA may be more viscous. These results hereby present the first field evidence that OA in anthropogenically influenced regions can be efficient INPs well above the homogeneous IN temperature.


Verlagsausgabe §
DOI: 10.5445/IR/1000151031
Veröffentlicht am 27.09.2022
Originalveröffentlichung
DOI: 10.1029/2022GL099990
Scopus
Zitationen: 4
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung (IMK)
Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 16.09.2022
Sprache Englisch
Identifikator ISSN: 0094-8276, 1944-8007
KITopen-ID: 1000151031
HGF-Programm 12.11.26 (POF IV, LK 01) Aerosol-Cloud-Climate-Interaction
Erschienen in Geophysical Research Letters
Verlag John Wiley and Sons
Band 49
Heft 17
Seiten e2022GL099990
Vorab online veröffentlicht am 02.09.2022
Nachgewiesen in Scopus
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Web of Science
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