The exhaust emissions from civil subsonic aircraft at cruise altitude are important man-made sources that pollute the upper troposphere and the lower stratosphere (8 km - 12 km). The formation of NO(y) species from NO(x), both before and after the exit nozzle, have created increasing environmental concerns. Flight histories of Boeing 747-400 aircraft during the cruise stage between selected city pairs have been simulated using a computer program developed at Cranfield University. The passive distribution of NO(x) and HNO3 is calculated using the UGAMP three-dimensional chemical transport model. The sink of NO(x), which is HNO3, is parameterized using an exponential decay process with an altitude-dependent lifetime. The model also includes transport by advection, vertical diffusion and convection. These simulations for January and July are analysed in terms of the resulting mean volume mixing ratios for both NO(x) and HNO3.


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    Title :

    Implications of NO(y) emissions from subsonic aircraft at cruise altitude


    Additional title:

    Auswirkungen von Stickoxidemissionen von Unterschallflugzeugen in Verkehrsflughöhe


    Contributors:
    Lee, S.H. (author) / Dilosquer, M. Le (author) / Singh, R. (author) / Hobbs, S.E. (author) / Giannakopoulos, C. (author) / Plantevin, P.H. (author) / Law, K.S. (author) / Pyle, J.a. (author) / Rycroft, M.J. (author)


    Publication date :

    1997


    Size :

    12 Seiten, 16 Bilder, 26 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Implications of NO~y emissions from subsonic aircraft at cruise altitude

    Lee, S. H. / Singh, R. / Rycroft, M. J. et al. | British Library Conference Proceedings | 1996


    Implications of NOy emissions from subsonic aircraft at cruise altitude

    Lee, S H / Le Dilosquer, M / Singh, R et al. | SAGE Publications | 1997


    Some considerations of engine emissions from subsonic aircraft at cruise altitude

    Lee, S. H. / Le Dilosquer, M. / Singh, R. et al. | British Library Conference Proceedings | 1994