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The aerosol-climate model ECHAM5-HAM

Stier, P. and Feichter, J. and Kinne, S. and Kloster, S. and Vignati, E. and Wilson, J. and Ganzeveld, L. and Tegen, I. and Werner, M. and Balkanski, Y. and Schulz, M. and Boucher, O. (2004) The aerosol-climate model ECHAM5-HAM. Atmospheric Chemistry and Physics Discussions, 4 (5). pp. 5551-5623. ISSN 1680-7375. http://resolver.caltech.edu/CaltechAUTHORS:STIacpd04

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Abstract

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 SO4: 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.


Item Type:Article
Additional Information:© 2004 Author(s). This work is licensed under a Creative Commons License. Received: 2 September 2004 – Accepted: 10 September 2004 – Published: 22 September 2004 We wish to thank A. Petzold and A. Minikin (German Aerospace Agency DLR, Oberpfaffenhofen) for making their unpublished aerosol profiles available. We are grateful to J. Prospero and D. Savoie (University of Miami) for providing the compilation of multi-annual surface observations and to B. Holben (NASA Goddard) for use of AERONET data. Many thanks also to S. Guilbert (LSCE, Gif-sur-Yvette) for helping us with the handling of the IMPROVE, EMEP, and GAW datasets. F. Dentener (JRC, Ispra) is to be thanked for his support with the emission data and many helpful discussions. Our thanks extends to our colleagues L. Kornblueh, S. Rast, A. Rhodin, E. Roeckner, and U. Schulzweida for their constant support with the ECHAM5-HAM model development and to M. Schultz for providing the MOZART chemistry data (Max Planck Institute for Meteorology, Hamburg). We would also like to acknowledge the support of the German DEKLIM project, of the International Max Planck Research School for Earth System Modelling, and of the EU project PHOENICS (EVK2-CT-2001-00098).
Record Number:CaltechAUTHORS:STIacpd04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:STIacpd04
Alternative URL:http://www.copernicus.org/EGU/acp/acpd/4/5551/
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4664
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:02 Sep 2006
Last Modified:26 Dec 2012 09:00

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