Show simple item record

contributor authorChuang, Patrick Y.
contributor authorNenes, Athanasios
contributor authorSmith, James N.
contributor authorFlagan, Richard C.
contributor authorSeinfeld, John H.
date accessioned2017-06-09T14:19:55Z
date available2017-06-09T14:19:55Z
date copyright2000/08/01
date issued2000
identifier issn0739-0572
identifier otherams-1741.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4153301
description abstractA new instrument for measuring cloud condensation nuclei (CCN) on board small aircraft is described. Small aircraft are attractive mainly because they are less costly, but they require instruments that are designed for minimum weight, volume, and power consumption; that are robust; and that are capable of autonomous operation and making measurements at a frequency appropriate for aircraft speeds. The instrument design combines the streamwise gradient technique previously reported by J. G. Hudson, and the alternating gradient condensation nuclei counter described by W. A. Hoppel et al. Field and laboratory measurements, and modeling studies show that this combination exhibits poor sensitivity for the measurement of CCN spectra; for the climatically important range of critical supersaturations, 0.03%?1%, the measured variable, droplet diameter, varies only by 30%. The ability to resolve CCN spectra using this method is therefore in question. Studies of this instrument in a fixed supersaturation mode show that it can measure CCN at a single supersaturation in the range of 0.1%?2%. Calibration and testing of the instrument in this mode is described. The instrument is capable of making accurate, high-frequency (>0.1 Hz) measurements of CCN at a fixed supersaturation, while satisfying the constraints for small aircraft.
publisherAmerican Meteorological Society
titleDesign of a CCN Instrument for Airborne Measurement
typeJournal Paper
journal volume17
journal issue8
journal titleJournal of Atmospheric and Oceanic Technology
identifier doi10.1175/1520-0426(2000)017<1005:DOACIF>2.0.CO;2
journal fristpage1005
journal lastpage1019
treeJournal of Atmospheric and Oceanic Technology:;2000:;volume( 017 ):;issue: 008
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record