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| Titel |
Modelling the impact of aircraft emissions on atmospheric composition |
| VerfasserIn |
D. K. Wasiuk, D. E. Shallcross, M. H. Lowenberg |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250063573
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| Zusammenfassung |
| Emissions of the trace gases CO2, CO, H2O, HC, NOx, and SOx that have the potential to
perturb large scale atmospheric composition are accumulating in the atmosphere at an
unprecedented rate as the demand for air traffic continues to grow. We investigate the global,
regional and local effects of aircraft emissions on the atmosphere and climate using
mathematical modelling, sensitivity simulations, and perturbation simulations. The approach
is to gather results for the three main industrialised regions in the Northern Hemisphere,
focusing on the 40°N - 60°N latitude belt where the majority of aircraft movements take
place. A comprehensive aircraft movement database spanning years 2005 - 2012, covering
225 countries and over 223 million departures on approx. 41000 unique routes serves
as a basis for our investigation. We combine air traffic data with output from an
aircraft performance model including 80 distinct aircraft types, representing 216 of
all the aircraft flown in the world in 2005 - 2012. This accounts for fuel burn and
emissions for 99.5% of the total number of departures during that time. Simulations are
being performed using a state of the art 3D Lagrangian global chemical transport
model (CTM) CRI–STOCHEM for simulation of tropospheric chemistry. The model
will be applied with two chemistry schemes, namely the Common Representative
Intermediates (CRI) reduced chemistry scheme (220 chemical species, 609 reactions) and
the near explicit Master Chemical Mechanism (MCM) chemistry scheme (5900
chemical species, 13500 reactions). This will allow us to study in detail the chemical
cycles driven by NOx, governing the rate of formation of O3 which controls the
production of OH and indirectly determines the lifetime of other greenhouse gases. |
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