Aircraft NO/x/ emissions and stratospheric ozone reductions - Another look

Conference · Thu Jan 01 00:00:00 EST 1981 · AIAA Pap.; (United States)

OSTI ID:6725730

Turco, R P ^[1]; Whitten, R C ^[2]; Toon, O B ^[3]

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1. R and D Associates, Marina del Rey, Calif.
2. NASA, Ames Research Center, Moffett Field, Calif.
3. Systems and Applied Sciences Corp., Hampton, Va.

New estimates for stratospheric ozone perturbations attributable to supersonic transport (SST) emissions are presented. First, a review is given of recent data pointing to lower OH concentrations below 30 km, as compared to the values predicted by photochemical models. The evidence for lower OH comes from a wide range of laboratory and atmospheric studies. The sensitivity of theoretical estimates of ozone change to OH abundances, and the coupling mechanisms between the O(x)-NO(x)-HO(x)-Cl(x) families which are responsible for the sensitivity, are discussed. Updated calculations for SST-induced ozone alterations are compared with older predictions. For example, assuming continuous aircraft injection of NO/sub 2/ at 20 km at a rate of 1 x 10 to the 9th kg per year (globally), a 4% ozone decrease, is now calculated where earlier a 3% ozone increase was found. This large variance from previous forecasts suggests that new assessments of certain other polluting agents, particularly nitrogen fertilizers, are needed.

• OSTI ID: 6725730
• Report Number(s): CONF-810106-
• Journal Information: AIAA Pap.; (United States), Vol. 81-0306; Conference: 19. Aerospace Sciences meeting, St Louis, MO, USA, 12 Jan 1981
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
OZONE
ATMOSPHERIC CHEMISTRY
SUPERSONIC TRANSPORT
ENVIRONMENTAL EFFECTS
AIR POLLUTION
EXHAUST GASES
JETS
NITROGEN OXIDES
PERFORMANCE
STRATOSPHERE
AIR TRANSPORT
CHALCOGENIDES
CHEMISTRY
EARTH ATMOSPHERE
FLUIDS
GASEOUS WASTES
GASES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
TRANSPORT
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)