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Vertical profiles of condensation nucleiCondensation nuclei measurements using a low supersaturation (about 10%) thermal gradient diffusion cloud chamber (TGDCC) and a high supersaturation (about 200%) expansion type instrument were compared on a series of three balloon flights over Laramie, Wyoming. In general, the two instruments produced similar vertical profiles but some discrepancies remain unexplained. Agreement between the two would indicate that the low supersaturations used in the TGDCC were still large enough to cause the instrument to count essentially all of the particles present. The TGDCC condensation nuclei (CN) counter was flown at several sites in both the Northern and Southern Hemispheres. The results indicate the existence of a relative maximum in the CN mixing ratio associated with the upper equatorial troposphere and what appears to be a worldwide constant mixing ratio of CN above 20-25 km.
Document ID
19790036128
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rosen, J. M.
(Wyoming Univ. Laramie, WY, United States)
Hofmann, D. J.
(Wyoming, University Laramie, Wyo., United States)
Kaselau, K. H.
(Koeln, Universitaet Cologne, Germany)
Date Acquired
August 9, 2013
Publication Date
November 1, 1978
Publication Information
Publication: Journal of Applied Meteorology
Volume: 17
Subject Category
Meteorology And Climatology
Accession Number
79A20141
Funding Number(s)
CONTRACT_GRANT: NSG-7349
CONTRACT_GRANT: N00014-76-C-0170
CONTRACT_GRANT: NSF DPP-76-17777
CONTRACT_GRANT: NSF ATM-76-02705-A01
CONTRACT_GRANT: DFG-FA-62/5
Distribution Limits
Public
Copyright
Other

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