Papers Published

1. Levy, H. II and Kasibhatla, P.S. and Moxim, W.J. and Klonecki, A.A. and Hirsch, A.I. and Oltmans, S.J. and Chameides, W.L., Global impact of human activity on tropospheric ozone, Geophysical Research Letters, vol. 24 no. 7 (1997), pp. 791 - 794 [97GL00599] .
   (last updated on 2007/04/09)

   Abstract:
   Simulation of present and preindustrial tropospheric ozone using an 11 level GCTM predicts that human activity has increased the annual integral of tropospheric ozone by 39% or 66% in the boundary layer, mainly due to stratospheric injection and loss through dry deposition. While tropospheric chemistry's net contribution is relatively small, it is a balance between the destruction in the background troposphere and production in the polluted boundary layer. Human impact predominates in the summertime extratropical northern hemisphere and in the tropics during biomass burning seasons. Conversely, there has been little increase in most of the upper troposphere, where ozone's influence on the tropospheric climate is strongest.

   Keywords:
   Atmospheric chemistry;Air pollution;Climate change;Nitrogen oxides;Carbon monoxide;Methane;Water;Environmental impact;Boundary layers;Computer simulation;