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| Titel |
Comparison of global 3-D aviation emissions datasets |
| VerfasserIn |
S. C. Olsen, D. J. Wuebbles, B. Owen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 1 ; Nr. 13, no. 1 (2013-01-15), S.429-441 |
| Datensatznummer |
250017558
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| Publikation (Nr.) |
 copernicus.org/acp-13-429-2013.pdf |
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| Zusammenfassung |
| Aviation emissions are unique from other transportation emissions, e.g.,
from road transportation and shipping, in that they occur at higher
altitudes as well as at the surface. Aviation emissions of carbon dioxide,
soot, and water vapor have direct radiative impacts on the Earth's climate
system while emissions of nitrogen oxides (NOx), sulfur oxides, carbon
monoxide (CO), and hydrocarbons (HC) impact air quality and climate through
their effects on ozone, methane, and clouds. The most accurate estimates of
the impact of aviation on air quality and climate utilize three-dimensional
chemistry-climate models and gridded four dimensional (space and time)
aviation emissions datasets. We compare five available aviation emissions
datasets currently and historically used to evaluate the impact of aviation
on climate and air quality: NASA-Boeing 1992, NASA-Boeing 1999, QUANTIFY
2000, Aero2k 2002, and AEDT 2006 and aviation fuel usage estimates from the
International Energy Agency. Roughly 90% of all aviation emissions are
in the Northern Hemisphere and nearly 60% of all fuelburn and NOx
emissions occur at cruise altitudes in the Northern Hemisphere. While these
datasets were created by independent methods and are thus not strictly
suitable for analyzing trends they suggest that commercial aviation fuelburn
and NOx emissions increased over the last two decades while HC emissions
likely decreased and CO emissions did not change significantly. The
bottom-up estimates compared here are consistently lower than International
Energy Agency fuelburn statistics although the gap is significantly smaller
in the more recent datasets. Overall the emissions distributions are quite
similar for fuelburn and NOx with regional peaks over the populated land
masses of North America, Europe, and East Asia. For CO and HC there are
relatively larger differences. There are however some distinct differences
in the altitude distribution of emissions in certain regions for the Aero2k
dataset. |
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