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The Portable Ice Nucleation Experiment (PINE): A new online instrument for laboratory studies and automated long-term field observations of ice-nucleating particles

Möhler, Ottmar; Adams, Michael; Lacher, Larissa; Vogel, Franziska; Nadolny, Jens; Ullrich, Romy; Boffo, Cristian; Pfeuffer, Tatjana; Hobl, Achim; Weiß, Maximilian; Vepuri, Hemanth S. K.; Hiranuma, Naruki; Murray, Benjamin J.

Abstract:
Atmospheric ice-nucleating particles (INPs) play an important role in determining the phase of clouds, which affects their albedo and lifetime. A lack of data on the spatial and temporal variation of INPs around the globe limits our predictive capacity and understanding of clouds containing ice. Automated instrumentation that can robustly measure INP concentrations across the full range of tropospheric temperatures is needed in order to address this knowledge gap. In this study, we demonstrate the functionality and capacity of the new Portable Ice Nucleation Experiment (PINE) to study ice nucleation processes and to measure INP concentrations under conditions pertinent for mixed-phase clouds, with temperatures from about −10 to about −40 C. PINE is a cloud expansion chamber which avoids frost formation on the cold walls and thereby omits frost fragmentation and related background ice signals during the operation. The development, working principle and treatment of data for the PINE instrument is discussed in detail. We present laboratory-based tests where PINE measurements were compared with those from the established AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000130512
Veröffentlicht am 19.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung (IMK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen-ID: 1000130512
Erschienen in Atmospheric Measurement Techniques
Verlag Copernicus Publications
Band 14
Heft 2
Seiten 1143-1166
Nachgewiesen in Scopus
Web of Science
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