A review of optical measurements at the aerosol and cloud chamber AIDA |
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Authors: | Robert Wagner Claudia Linke Martin Schnaiter Martin Gangl |
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Institution: | a Forschungszentrum Karlsruhe, Institute of Meteorology and Climate Research (IMK-AAF), D-76021 Karlsruhe, Germany b University of Vienna, Institute for Experimental Physics, A-1090 Vienna, Austria |
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Abstract: | This paper provides a survey of recent studies on the optical properties of aerosol and cloud particles that have been conducted at the AIDA facility of Forschungszentrum Karlsruhe (Aerosol Interactions and Dynamics in the Atmosphere). Reflecting the broad accessible temperature range of the AIDA chamber which extends from ambient temperature down to 183 K, the investigations feature a broad diversity of research topics, such as the wavelength-dependence of the specific absorption cross sections of soot and mineral dust aerosols at room temperature, depolarization and infrared extinction measurements of ice crystal clouds generated at temperatures below 235 K, and the optical properties of polar stratospheric cloud constituents whose formation was studied in chamber experiments at temperatures well below 200 K. After reviewing the AIDA research activity of the past decade and introducing the optical instrumentation of the AIDA facility, this paper presents illustrative examples of ongoing and already published work on optical measurements of soot aerosols, mineral dust particles, and ice crystal clouds. |
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Keywords: | AIDA chamber Extinction Light scattering Light absorption Depolarization Infrared spectroscopy Polar nephelometer Photo acoustic spectrometer Optical properties Refractive indices Soot aerosol Mineral dust Ice crystals Non-spherical particles |
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