HR: 17:00h
AN: A34B-05 INVITED    [Abstracts]
TI: Modelling of long-term trends and variability of tropospheric ozone and its precursors and their sensitivity to NOx emission changes
AU: * Schultz, M G
EM: m.schultz@fz-juelich.de
AF: ICG-2 Research Centre Juelich, Leo Brandt Str, Juelich, 52425, Germany
AU: Team, R
EM: retro@enes.org
AB: The tropospheric chemical composition has changed markedly over time. Particularly large changes have been observed during recent decades associated largely with economic growth and increased energy consumption. In the European RETRO project we compiled new global emission data sets for NOx, CO and NMVOC species and performed multi-decadal simulations using three state-of-the-art chemistry transport and chemistry climate models. The models were evaluated with available observations from satellite, ground based networks and aircraft sampling. Some historic data were re-analyzed specifically for the project. In spite of some biases found in the model simulations, all three models are generally consistent with respect to the overall trend in ozone and precursor concentrations. Longer-term changes are mostly related to changing emissions, while shorter term fluctuations are predominantly attributed to meteorological variability. Additional sensitivity calculations provide some insight into the modeled response to projected NOx emission changes.
UR: http://retro.enes.org
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0355 Thermosphere: composition and chemistry
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting