Papers Published

1. Kasibhatla, P.S., NO_y from sub-sonic aircraft emissions: a global three-dimensional model study, Geophys. Res. Lett. (USA), vol. 20 no. 16 (1993), pp. 1707 - 10 .
   (last updated on 2007/04/09)

   Abstract:
   The 11-level Geophysical Fluid Dynamics Laboratory global chemical transport model (GCTM) has been used to assess the impact of sub-sonic aircraft emissions on the distribution of reactive nitrogen compounds (NO_y) in the atmosphere. A three-dimensional aircraft source inventory has been used. It is found that aircraft emissions have a significant impact on upper tropospheric NO_x and HNO₃ budgets in the mid- and high latitudes of the Northern Hemisphere. Moreover, the relative impact of the aircraft source on upper tropospheric NO_x levels at mid- and high northern latitudes varies longitudinally, and in certain regions the aircraft source dominates the total NO_x budget. Aircraft emissions have only a small effect on the NO_y budget in the Northern Hemisphere lower troposphere, and in much of the Southern Hemisphere. Comparisons of model results with NO_y measurements suggest that sources other than surface-based fossil-fuel combustion, stratospheric NO_x production, and aircraft emissions, are significant in determining the free tropospheric NO_y budget

   Keywords:
   air pollution;aircraft;atmospheric chemistry;atmospheric composition;nitrogen compounds;troposphere;