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Subsidence of aircraft engine exhaust in the stratosphere: Implications for calculated ozone depletionsThe deposition altitude of nitrogen oxides and other exhaust species emitted by stratospheric aircraft is a crucial parameter in determining the impact of these emissions on stratospheric ozone. We have utilized a model for the wake of a High-Speed Civil Transport (HSCT) to estimate the enhancements in water and reductions in ozone in these wakes as a function of time. Radiative calculations indicate differential cooling rates as large as -5K/day at the beginning of the far-wake regime, mostly due to the enhanced water abundance. These cooling rates would imply a net sinking of the wakes of about 1.2 km after three days in the limit of no mixing. Calculated mid-latitude column ozone reductions due to emissions from a Mach 2.4 HSCT would then change from about -1% to -06%. However, more realistic calculations adopting moderate mixing for the wake reduce the net sinking to less than 0.2 km, making the impact of radiative subsidence negligible.
Document ID
19950038698
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Rodriguez, J. M.
(Atmospheric Environmental Research, Inc. Cambridge, MA, United States)
Shia, R.-L.
(Atmospheric Environmental Research, Inc. Cambridge, MA, United States)
Ko, M. K. W.
(Atmospheric Environmental Research, Inc. Cambridge, MA, United States)
Heisey, C. W.
(Atmospheric Environmental Research, Inc. Cambridge, MA, United States)
Weistenstein, D. K.
(Atmospheric Environmental Research, Inc. Cambridge, MA, United States)
Miake-Lye, R. C.
(Aerodyne Research, Inc. Billerica, MA, United States)
Kolb, C. E.
(Aerodyne Research, Inc. Billerica, MA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 1
ISSN: 0094-8276
Subject Category
Environment Pollution
Report/Patent Number
PAPER-93GL03426
Accession Number
95A70297
Funding Number(s)
CONTRACT_GRANT: NAS1-19161
Distribution Limits
Public
Copyright
Other

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