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FTIR studies of low temperature sulfuric acid aerosolsSub-micrometer sized sulfuric acid H2SO4 particles were generated using a constant output atomizer source. The particles were then exposed to water vapor before being injected into a low temperature cell. Multipass transmission Fourier Transformation Infrared (FTIR) spectroscopy was used to determine the phase and composition of the aerosols as a function of time for periods of up to five hours. Binary H2SO4H2O aerosols with compositions from 35 to 95 wt % H2SO4 remained liquid for over 3 hours at room temperatures ranging from 189-240 K. These results suggest that it is very difficut to freeze SSAs via homogeneous nucleation. Attempts to form aerosols more dilute than 35 wt % H2SO4 resulted in ice formation.
Document ID
19950063682
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Anthony, S. E.
(CIRES, University of Colorado, Boulder, CO, United States)
Tisdale, R. T.
(CIRES, University of Colorado, Boulder, CO, United States)
Disselkamp, R. S.
(CIRES, University of Colorado, Boulder, CO, United States)
Tolbert, M. A.
(CIRES, University of Colorado, Boulder, CO, United States)
Wilson, J. C.
(University of Denver, Denver, CO United States)
Date Acquired
August 17, 2013
Publication Date
May 1, 1995
Publication Information
Publication: Geophysical Research Letters
Volume: 22
Issue: 9
ISSN: 0094-8276
Subject Category
Environment Pollution
Accession Number
95A95281
Distribution Limits
Public
Copyright
Other

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