March 29, 2018

Read e-book online A Review of NASA's 'Atmospheric Effects of Stratospheric PDF

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

ISBN-10: 0309065895

ISBN-13: 9780309065894

ISBN-10: 0585197989

ISBN-13: 9780585197982

The NRC Panel at the Atmospheric results of Aviation (PAEAN) was once demonstrated to supply tips to NASA's Atmospheric results of Aviation software (AEAP) through comparing the appropriateness of the program's learn plan, appraising the project-sponsored effects relative to the present nation of clinical wisdom, determining key clinical uncertainties, and suggesting learn actions more likely to lessen 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) elements of AEAP, together with: An period in-between assessment of the Subsonic evaluate undertaking (1997); An intervening time overview of AEAP's Emissions Characterization and Near-Field Interactions components (1997); An meantime evaluate of the AESA undertaking: technological know-how and growth (1998); Atmospheric results of aviation: A evaluate of NASA's Subsonic overview undertaking (1998). This record constitutes the ultimate assessment of AESA and should be the final file written by way of this panel. the first viewers for those experiences is this system managers and scientists affiliated with AEAP, even though at times the themes mentioned are of curiosity to a much wider audience.

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Extra resources for A Review of NASA's 'Atmospheric Effects of Stratospheric Aircraft' Project

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S. regulatory and international diplomatic requirements in regards to the effects of aviation on the atmosphere. Page 8 2 Scientific Discussion In this chapter, recent improvements in understanding supersonic aircraft emissions, the transport of these emissions, and their chemical and radiative impacts are reviewed. The contributions that AESA has made to these developments are discussed, as are the areas where significant uncertainties remain and where more research is needed. Special focus is given to two components of AESA's research programglobal models and field campaignsbecause these constitute the dominant part of the overall program.

The urpose of this independent review is to provide candid and critical comments that will assist the authors and the NRC in making the published report as sound as possible and to ensure that the report meets institutional standards for objectivity, evidence, and responsiveness to the study charge. The content of the review comments and draft manuscript remain confidential to protect the integrity of the deliberative process. We thank the following individuals for their participation in the review of this report: Guy Brasseur, National Center for Atmospheric Research Thomas Graedel, Yale University Harold Johnston, University of California, Berkeley Murry Salby, University of Colorado, Boulder Drew Shindell, NASA Goddard Institute for Space Studies Ian Waitz, Massachusetts Institute of Technology Leah Williams, SRI International James Charles Wilson, University of Denver While the individuals listed above have provided many constructive comments and suggestions, responsibility for the final content of this report rests solely with the authors and the NRC.

The "age" of an air parcel is defined as the average of the transit times from first entering the stratosphere for the ensemble making up the air parcel (Hall and Plumb, 1994). If the tropospheric concentration of a chemically inert species is increasing linearly with time, the age can be estimated by taking the time lag between the observation time and when the tropospheric mixing ratio was equivalent to the observed parcel mixing ratio. The age has been determined from several measurements of tracers with approximately linear trends.

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A Review of NASA's 'Atmospheric Effects of Stratospheric Aircraft' Project by National Research Council, Division on Earth and Life Studies, Environment and Resources Commission on Geosciences, Panel on Atmospheric Effects of Aviation

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