Intercomparison study of six HTDMAs: results and recommendations

J. Duplissy, M. Gysel, S. Sjogren, N. Meyer, N. Good, L. Kammermann, V. Michaud, R. Weigel, S. Martins dos Santos, C. Gruening, P. Villani, P. Laj, K. Sellegri, A. Metzger, G. B. McFiggans, G. Wehrle, R. Richter, J. Dommen, Z. Ristovski, U. BaltenspergerE. Weingartner

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    Abstract

    We report on an intercomparison of six different hygroscopicity tandem differential mobility analysers (HTDMAs). These HTDMAs are used worldwide in laboratory experiments and field campaigns to measure the water uptake of aerosol particles and have never been intercompared. After an investigation of the different design of the instruments with their advantages and inconveniencies, the methods for calibration, validation and data analysis are presented. Measurements of nebulised ammonium sulphate as well as of secondary organic aerosol generated from a smog chamber were performed. Agreement and discrepancies between the instruments and to the theory are discussed, and final recommendations for a standard instrument are given, as a benchmark for laboratory or field experiments to ensure a high quality of HTDMA data.

    Original languageEnglish
    Pages (from-to)363-378
    Number of pages16
    JournalAtmospheric Measurement Techniques
    Volume2
    Issue number2
    DOIs
    Publication statusPublished - 2009

    Keywords

    • AEROSOL
    • HYGROSCOPIC GROWTH
    • ATMOSPHERIC AEROSOL
    • H-TDMA
    • VOLATILE PROPERTIES
    • GROWTH MEASUREMENTS
    • RELATIVE-HUMIDITY
    • AMMONIUM-SULFATE
    • LOW-TEMPERATURES
    • TANDEM DMA

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