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| Titel |
ICON–ART 1.0 – a new online-coupled model system from the global to regional scale |
| VerfasserIn |
D. Rieger, M. Bangert, I. Bischoff-Gauss, J. Förstner, K. Lundgren, D. Reinert, J. Schröter, H. Vogel, G. Zängl, R. Ruhnke, B. Vogel |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 6 ; Nr. 8, no. 6 (2015-06-04), S.1659-1676 |
| Datensatznummer |
250116402
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| Publikation (Nr.) |
 copernicus.org/gmd-8-1659-2015.pdf |
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| Zusammenfassung |
We present the first stage of a new online-coupled global to regional-scale modeling framework for the simulation of the spatiotemporal
evolution of aerosols and trace gases. The underlying meteorological
model is the new nonhydrostatic model system ICON (ICOsahedral
Nonhydrostatic) which allows a local grid refinement with two-way
interactions between the grids. We develop the extension ART (Aerosol
and Reactive Trace gases) with the goal of simulating interactions
between trace substances and the state of the atmosphere. Within this
paper, we present the basic equations and give an overview of the
physical parameterizations as well as numerical methods we use.
First applications of the new model system for trace gases,
monodisperse particles and polydisperse particles are shown. The
simulated distribution of two very short-lived substances (VSLS), bromoform
(CHBr3) and dibromomethane (CH2Br2) reflecting the fast upward
transport shows a good agreement with observations and previous model
studies. Also, the shape of the simulated tropical profiles is well
reproduced. As an example for the treatment of monodisperse particles
we present the simulated ash plume of the Eyjafjallajökull eruption
in April 2010. Here, a novel approach for the source function is
applied. The pattern of the simulated distribution of volcanic ash
particles shows a good agreement with previous studies. As an example
for the treatment of a polydisperse aerosol, where number densities
and mass concentrations are accounted for, we simulated the annual
emissions of sea salt. We obtain a total emission flux of
26.0 Pg yr−1 and an emission flux of particles with
diameter less than 10 μm of 7.36 Pg yr−1. |
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