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Subarctic atmospheric aerosol composition: 2. Hygroscopic growth properties
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2009 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 114, no D13Article in journal (Refereed) Published
Abstract [en]

Subarctic aerosols were sampled during July 2007 at the Abisko Scientific Research Station Stordalen site in northern Sweden with an instrument setup consisting of a custom-built Hygroscopicity Tandem Differential Mobility Analyzer (HTDMA) connected in series to a single particle mass spectrometer. Aerosol chemical composition in the form of bipolar single particle mass spectra was determined as a function of hygroscopic growth both in situ and in real time. The HTDMA was deployed at a relative humidity of 82%, and particles with a dry mobility diameter of 260 nm were selected. Aerosols from two distinct air masses were analyzed during the sampling period. Sea salt aerosols were found to be the dominant particle group with the highest hygroscopicity. High intensities of sodium and related peaks in the mass spectra were identified as exclusive markers for large hygroscopic growth. Particles from biomass combustion were found to be the least hygroscopic aerosol category. Species normally considered soluble (e.g., sulfates and nitrates) were found in particles ranging from high to low hygroscopicity. Furthermore, the signal intensities of the peaks related to these species did not correlate with hygroscopicity.

Place, publisher, year, edition, pages
John Wiley & Sons, Ltd , 2009. Vol. 114, no D13
Keywords [en]
Arctic, aerosol, hygroscopicity
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-8109DOI: 10.1029/2008JD011574OAI: oai:DiVA.org:polar-8109DiVA, id: diva2:1288179
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2019/02/12
Available from: 2019-02-12 Created: 2019-02-12 Last updated: 2019-02-12

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