Lower stratosphere trace gas detection using aircraft-borne active chemical ionization mass spectrometry

Details Lower stratosphere trace gas detection using aircraft-borne active chemical ionization mass spectrometry Lower stratosphere trace gas detection using aircraft-borne active chemical ionization mass spectrometry

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.315..307a&link_type=abstract

Nature (ISSN 0028-0836), vol. 315, May 23, 1985, p. 307-309. Research supported by the Bundesministerium für Forschung und Techn

Computer Science

27

Gas Analysis, Mass Spectroscopy, Stratosphere, Trace Contaminants, Airborne Equipment, Gas Detectors, Gas Ionization, Photochemical Reactions, Pollution Transport

Scientific paper

A search for acetaldehyde and acetone trace gases in the tropopause using aircraft-borne Active Chemical Ionization Mass Spectrometry (ACIMS) is described. A brief outline of the ACIMS search procedure is given and a schematic drawing of the ACIMS instrument is provided. ACIMS measurements of acetaldehyde and acetone were compared with model predictions and conventional spectrometric measurements, in order to evaluate the effectiveness of the ACIM technique. It is found that ACIMS measurements of acetaldehyde and acetone at 15,000 m were slightly higher than the model predictions of Singh and Hanst (1981). However, measurements of acenonitrile and ammonia obtained using balloon borne passive ionization mass spectrometry and remote infrared heterodyne radiometers showed reasonable agreement with the ACIMS measurements. The possibility of detecting peroxyacetyl nitrate in the upper tropopause and stratosphere using ACIMS is also discussed.

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