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Nitrous oxide as a dynamical tracer in the 1987 Airborne Antarctic Ozone ExperimentIn situ N2O measurements were made using an airborne tunable laser absorption spectrometer (ATLAS) on 12 flights into the Antarctic vortex, as well as on five transit flights outside the vortex region in August and September 1987, as part of the Airborne Antartic Ozone Experiment. Vertical profiles of N2O were obtained within the vortex on most of these flights and were obtained outside the vortex on several occasions. Flights into the vortex region show N2O decreasing southward between 53 and 72 S latitude on constant potential temperature surfaces in the lower stratosphere. The data lead to two important conclusions about the vortex region: (1) the lower stratosphere in August/September 1987 was occupied by 'old' air, which had subsided several kilometers during polar winter; (2) the N2O profile in the vortex was in an approximately steady state in August/September 1987, which indicates that the spring upwelling, suggested by several theories, did not occur.
Document ID
19890066542
Document Type
Reprint (Version printed in journal)
Authors
Loewenstein, M. (NASA Ames Research Center Moffett Field, CA, United States)
Podolske, J. R. (NASA Ames Research Center Moffett Field, CA, United States)
Chan, K. R. (NASA Ames Research Center Moffett Field, CA, United States)
Strahan, S. E. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
August 30, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Distribution Limits
Public
Copyright
Other