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| Titel |
To what extent does the choice of an emissions inventory matter when doing chemical data assimilation in a global CTM? |
| VerfasserIn |
Robert Pommrich, Jean-Luc Attié, Béatrice Josse, Laaziz El Amraoui, Marine Claeyman, Philippe Ricaud, Vincent-Henri Peuch |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053591
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| Zusammenfassung |
| Emission inventories are needed in chemistry-transport models to prescribe the sources of
trace gases in the atmosphere. Each inventory has its own approaches and specialties, its own
variabilities in space and time, and therefore a different influence on the results of model
runs. As an illustration, we consider here the influence of two different biomass burning
emissions datasets on simulations with MOCAGE, the global chemistry and transport model
of Météo-France: we have considered the biomass burning part of the emission
inventory EDGAR version 4.1 on the one hand, and GFED version 3.1 on the other
hand.
We performed assimilation of CO data from the MOPITT instrument on the TERRA
platform (both versions 3 and 4 of the data) in two configurations of MOCAGE differing only
by the biomass burning emissions. The assimilation technique used is 3D-FGAT,
which is implemented using the PALM software of CERFACS; the assimilation
system itself is well-validated and has been used for several studies in the past.
This study takes only CO into account, a quite well-understood tracer for biomass
burning. To validate the results of the assimilation runs with independent data we
compare with measurement taken within the MOZAIC project. The overall aim of our
study is to assess the impact the assimilation of MOPITT data has on model results,
and if this critically depends (or not) upon the choice of a given biomass burning
inventory.
This study is part of the POGEQA project, funded by RTRA/STAE in France
(http://www.fondation-stae.net/). |
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