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Hygroscopic behavior of partially volatilized coastal marine aerosols using the volatilization and humidification tandem differential mobility analyzer technique

Johnson, Graham R., Ristovski, Zoran, D'Anna, Barbara, & Morawska, Lidia (2005) Hygroscopic behavior of partially volatilized coastal marine aerosols using the volatilization and humidification tandem differential mobility analyzer technique. Journal of Geophysical Research, 110(D20203).

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Abstract

Coastal marine nucleation, Aitken and accumulation mode aerosol particles with back trajectories indicative of marine origin were examined using a Volatilization and Humidification Tandem Differential Mobility Analyzer (VH-TDMA) to reveal the volatilization temperatures of the various component species. The diameter hygroscopic growth factors of the residue particles were continually examined throughout the volatilization process. In each of the three modes the dominant particle type appeared to be composed of the same four physicochemically distinct species though in different ratios. These species exhibited volatility and hygroscopic behavior consistent with combinations of a volatile organic species, sulfuric acid, ammonium sulfate or bisulfate, iodine oxide and an insoluble non-volatile residue.

The Aitken and Accumulation mode aerosols contain large fractions of the insoluble, volatile, organic like material, and the volatilization of this species results in a distinct increase in the water volume uptake of the particles. Of the four distinct species only the sulfuric acid like species constituted an increasing volume fraction with decreasing particle size. This finding indicates that nucleation mode particles constitute an acidic seed and as such would undergo acid catalyzed secondary organic aerosol growth at a faster rate. The lack of a non-volatile hygroscopic residue consistent with sea salt in these particles implies that the aerosolization of seawater is not the dominant production mechanism for these submicrometer coastal marine aerosols.

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ID Code: 1424
Item Type: Journal Article
Keywords: VH, TDMA, Marine aerosols, hygroscopic growth, volatility, TDMA, sulfate, sulfuric acid, iodine oxides, ammonium sulfate, MSA, sea salt, nss, sulfate, structure, climate, nucleation, accumulation, Aitken, modes, particles
DOI: 10.1029/2004JD005657
ISSN: 0148-0227
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Analytical Chemistry not elsewhere classified (030199)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > OTHER CHEMICAL SCIENCES (039900) > Environmental Chemistry (incl. Atmospheric Chemistry) (039901)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Synchrotrons; Accelerators; Instruments and Techniques (029904)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Instrumental Methods (excl. Immunological and Bioassay Methods) (030105)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Climatology (excl. Climate Change Processes) (040105)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2005 American Geophysical Union
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 13 Jul 2006
Last Modified: 29 Feb 2012 23:16

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