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A case of type I polar stratospheric cloud formation by heterogeneous nucleationThe NASA ER-2 aircraft flew on January 24, 1989, from Stavanger to Spitsbergen, Norway, at the 430-440 K potential temperature surface (19.2-19.8 km pressure altitude). Aerosols were sampled continuously by an optical particle counter (PMS-FSSP300) for concentration and size analyses, and during five 10-min intervals by four wire and one replicator impactor for concentration, size, composition, and phase analysis. During sampling, the air saturation of H2O with respect to ice changed from 20 to 100 percent, and of HNO3 with respect to nitric acid trihydrate (NAT) from subsaturation to supersaturation. Data from both instruments indicate a condensation of hydrochloric acid and, later, nitric acid on the background aerosol particles as the ambient temperature decreases along the flight track. This heterogeneous nucleation mechanism generates type I polar stratospheric cloud particles of 10-fold enhanced optical depth, which could play a role in stratospheric ozone depletion.
Document ID
19920059298
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Pueschel, R. F.
(NASA Ames Research Center Moffett Field, CA, United States)
Ferry, G. V.
(NASA Ames Research Center Moffett Field, CA, United States)
Snetsinger, K. G.
(NASA Ames Research Center Moffett Field, CA, United States)
Goodman, J.
(San Jose State University CA, United States)
Dye, J. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Baumgardner, D.
(NASA Ames Research Center Moffett Field, CA, United States)
Gandrud, B. W.
(NCAR Boulder, CO, United States)
Date Acquired
August 15, 2013
Publication Date
May 30, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: D8 M
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
92A41922
Funding Number(s)
PROJECT: RTOP 147-14-31-10
Distribution Limits
Public
Copyright
Other

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