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Simulating aerosol microphysics with the ECHAM/MADE GCM - Part I: Model description and comparison with observations

Lauer, Axel und Hendricks, Johannes und Schell, Benedikt und Ackermann, Ingmar und Hass, Heinz und Metzger, Swen (2005) Simulating aerosol microphysics with the ECHAM/MADE GCM - Part I: Model description and comparison with observations. Atmospheric Chemistry and Physics, 5, Seiten 3251-3276.

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Offizielle URL: http://www.copernicus.org/EGU/acp/acp/5/3251/acp-5-3251.htm

Kurzfassung

The aerosol dynamics module MADE has been coupled to the general circulation model ECHAM4 to simulate the chemical composition, number concentration, and size distribution of the global submicrometer aerosol. The present publication describes the new model system ECHAM4/MADE and presents model results in comparison with observations. The new model is able to simulate the full life cycle of particulate matter and various gaseous particle precursors including emissions of primary particles and trace gases, advection, convection, diffusion, coagulation, condensation, nucleation of sulfuric acid vapor, aerosol chemistry, cloud processing, and size-dependent dry and wet deposition. Aerosol components considered are sulfate (SO<sub>4</sub>), ammonium (NH<sub>4</sub>), nitrate (NO<sub>3</sub>), black carbon (BC), particulate organic matter (POM), sea salt, mineral dust, and aerosol liquid water. The model is numerically efficient enough to allow long term simulations, which is an essential requirement for application in general circulation models. Since the current study is focusing on the submicrometer aerosol, a coarse mode is not being simulated. The model is run in a passive mode, i.e. no feedbacks between the MADE aerosols and clouds or radiation are considered yet. This allows the investigation of the effect of aerosol dynamics, not interfered by feedbacks of the altered aerosols on clouds, radiation, and on the model dynamics. In order to evaluate the results obtained with this new model system, calculated mass concentrations, particle number concentrations, and size distributions are compared to observations. The intercomparison shows, that ECHAM4/MADE is able to reproduce the major features of the geographical patterns, seasonal cycle, and vertical distributions of the basic aerosol parameters. In particular, the model performs well under polluted continental conditions in the northern hemispheric lower and middle troposphere. However, in comparatively clean remote areas, e.g. in the upper troposphere or in the southern hemispheric marine boundary layer, the current model version tends to underestimate particle number concentrations.

Dokumentart:Zeitschriftenbeitrag
Titel:Simulating aerosol microphysics with the ECHAM/MADE GCM - Part I: Model description and comparison with observations
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Lauer, AxelNICHT SPEZIFIZIERT
Hendricks, JohannesNICHT SPEZIFIZIERT
Schell, BenediktFord Research Center Aachen, Aachen
Ackermann, IngmarFord Research Center Aachen, Aachen
Hass, HeinzFord Research Center Aachen, Aachen
Metzger, SwenMPI for Chemistry, Mainz
Datum:7 Dezember 2005
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:5
Seitenbereich:Seiten 3251-3276
Status:veröffentlicht
Stichwörter:ECHAM, MADE, aerosol dynamics
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):V - keine Zuordnung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Dynamik der Atmosphäre
Hinterlegt von: Dr.rer.nat. Axel Lauer
Hinterlegt am:14 Sep 2007
Letzte Änderung:11 Nov 2014 21:56

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