A Review of NASA's 'Atmospheric Effects of Stratospheric by National Research Council, Division on Earth and Life

By National Research Council, Division on Earth and Life Studies, Environment and Resources Commission on Geosciences, Panel on Atmospheric Effects of Aviation

The NRC Panel at the Atmospheric results of Aviation (PAEAN) was once demonstrated to supply assistance to NASA's Atmospheric results of Aviation software (AEAP) by means of comparing the appropriateness of the program's learn plan, appraising the project-sponsored effects relative to the present nation of medical wisdom, selecting key medical uncertainties, and suggesting examine actions prone to decrease these uncertainties.

Over the previous few years, the panel has written periodic studies of either the subsonic aviation (Subsonic Assessment-SASS) and the supersonic aviation (Atmospheric results of Stratospheric Aircraft-AESA) parts of AEAP, together with: An period in-between assessment of the Subsonic review undertaking (1997); An meantime evaluate of AEAP's Emissions Characterization and Near-Field Interactions parts (1997); An period in-between evaluation of the AESA undertaking: technology and growth (1998); Atmospheric results of aviation: A overview of NASA's Subsonic evaluation undertaking (1998). This document constitutes the ultimate evaluate of AESA and should be the final record written through this panel. the first viewers for those stories is this system managers and scientists affiliated with AEAP, even though occasionally the subjects mentioned are of curiosity to a much broader audience.

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Dr. Bruce M. Alberts is president of the National Academy of Sciences. The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the responsibility for advising the federal government. The National Academy of Engineering also sponsors engineering programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers.

1999) discusses a series of more recent measurements that provide detailed information on particle emissions and their variability for different aircraft and measurement techniques (Table 2). , 1998b). Their results also suggest that particle number increases with fuel sulfur content, in contrast to previous findings (Durlak, 1997). , 1998b). , 1998). There is strong evidence that the volatile aerosols are formed through the conversion of SO2 emitted by the engines and then subsequently oxidized to sulfuric acid.

1995) measurements yielded a conversion rate of SO2 to sulfuric acid of 1245 percent, which is significantly higher than the one percent conversion rate predicted by previous studies. This finding has led to a large number of modeling studies and subsequent measurements, but for subsonic aircraft only (SUCCESS campaign, SULFUR-5 and 6 campaigns4. Modeling studies also have indicated that the conversion rates should decrease when the 4SUCCESS (Subsonic Aircraft: Contrail and Cloud Effects Special Study) was a NASA field campaign carried out in spring 1996 and based in Salina, Kansas.

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