Stratospheric aircraft: Impact on the stratosphere?
Conference
·
OSTI ID:10162460
The steady-state distribution of natural stratospheric ozone is primarily maintained through production by ultraviolet photolysis of molecular oxygen, destruction by a catalytic cycle involving nitrogen oxides (NO{sub x}), and relocation by air motions within the stratosphere. Nitrogen oxides from the exhausts of a commercially viable fleet of supersonic transports would exceed the natural source of stratospheric nitrogen oxides if the t should be equipped with 1990 technology jet engines. This model-free comparison between a vital natural global ingredient and a proposed new industrial product shows that building a large fleet of passenger stratospheric aircraft poses a significant global problem. NASA and aircraft industries have recognized this problem and are studying the redesign of jet aircraft engines in order to reduce the nitrogen oxides emissions. In 1989 atmospheric models identified two other paths by which the ozone destroying effects of stratospheric aircraft might be reduced or eliminated: (1) Use relatively low supersonic Mach numbers and flight altitudes. For a given rate of nitrogen oxides injection into the stratosphere, the calculated reduction of total ozone is a strong function of altitude, and flight altitudes well below 20 kilometers give relatively low calculated ozone reductions. (2) Include heterogeneous chemistry in the two-dimensional model calculations. Necessary conditions for answering the question on the title above are to improve the quality of our understanding of the lower stratosphere and to broaden our knowledge of hetergeneous stratospheric chemistry. This article reviews recently proposed new mechanisms for heterogeneous reactions on the global stratospheric sulfate aerosols.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10162460
- Report Number(s):
- LBL--31884; CONF-911212--2; ON: DE92016997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stratospheric aircraft: Impact on the stratosphere
Preventing depletion of stratospheric ozone: Implications on future aircraft emissions
Preventing depletion of stratospheric ozone---Implications on future aircraft emissions: Revision 1
Conference
·
Fri Jan 31 23:00:00 EST 1992
·
OSTI ID:7279879
Preventing depletion of stratospheric ozone: Implications on future aircraft emissions
Conference
·
Fri Mar 31 23:00:00 EST 1989
·
OSTI ID:6249101
Preventing depletion of stratospheric ozone---Implications on future aircraft emissions: Revision 1
Conference
·
Mon May 01 00:00:00 EDT 1989
·
OSTI ID:5993150