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| Titel |
The aerosol-climate model ECHAM5-HAM |
| VerfasserIn |
P. Stier, J. Feichter, S. Kinne, S. Kloster, E. Vignati, J. Wilson, L. Ganzeveld, I. Tegen, M. Werner, Y. Balkanski, M. Schulz, O. Boucher, A. Minikin, A. Petzold |
| 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 ; 5, no. 4 ; Nr. 5, no. 4 (2005-03-31), S.1125-1156 |
| Datensatznummer |
250002671
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| Publikation (Nr.) |
 copernicus.org/acp-5-1125-2005.pdf |
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| Zusammenfassung |
| The aerosol-climate modelling system ECHAM5-HAM is introduced. It is based on
a flexible microphysical approach and, as the number of externally imposed
parameters is minimised, allows the application in a wide range of climate
regimes. ECHAM5-HAM predicts the evolution of an ensemble of microphysically
interacting internally- and externally-mixed aerosol populations as well as
their size-distribution and composition. The size-distribution is represented
by a superposition of log-normal modes. In the current setup, the major
global aerosol compounds sulfate (SU), black carbon (BC), particulate organic
matter (POM), sea salt (SS), and mineral dust (DU) are included. The
simulated global annual mean aerosol burdens (lifetimes) for the year 2000
are for SU: 0.80 Tg(S) (3.9 days), for BC: 0.11 Tg (5.4 days), for POM: 0.99
Tg (5.4 days), for SS: 10.5 Tg (0.8 days), and for DU: 8.28 Tg (4.6 days). An
extensive evaluation with in-situ and remote sensing measurements underscores
that the model results are generally in good agreement with observations of
the global aerosol system. The simulated global annual mean aerosol optical
depth (AOD) is with 0.14 in excellent agreement with an estimate derived from
AERONET measurements (0.14) and a composite derived from MODIS-MISR satellite
retrievals (0.16). Regionally, the deviations are not negligible. However,
the main patterns of AOD attributable to anthropogenic activity are
reproduced. |
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