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Antarctic stratospheric ice crystalsIce crystals were replicated over the Palmer Peninsula at approximately 72 deg S on six occasions during the 1987 Airboirne Antarctic Ozone Experiment. The sampling altitude was between 12.5 and 18.5 km (45-65 thousand ft pressure altitude) with the temperature between 190 and 201 K. The atmosphere was subsaturated with respect to ice in all cases. The collected crystals were predominantly solid and hollow columns. The largest crystals were sampled at lower altitudes where the potential temperature was below 400 K. While the crystals were larger than anticipated, their low concentration results in a total surface area that is less than one tenth of the total aerosol surface area. The large ice crystals may play an important role in the observed stratospheric dehydration processes through sedimentation. Evidence of scavenging of submicron particles further suggests that the ice crystals may be effective in the removal of stratospheric chemicals.
Document ID
19900031872
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Goodman, J.
(San Jose State University CA, United States)
Toon, O. B.
(San Jose State Univ. CA, United States)
Pueschel, R. F.
(San Jose State Univ. CA, United States)
Snetsinger, K. G.
(NASA Ames Research Center Moffett Field, CA, United States)
Verma, S.
(TMA/Norcal Richmond, CA, United States)
Date Acquired
August 14, 2013
Publication Date
November 30, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
90A18927
Distribution Limits
Public
Copyright
Other

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