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| Titel |
Simulating the global ozone distribution with ICON-ART |
| VerfasserIn |
Jennifer Schröter, Roland Ruhnke |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250102401
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| Publikation (Nr.) |
 EGU/EGU2015-1715.pdf |
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| Zusammenfassung |
| Ozone is one of the most important atmospheric trace gases within the stratosphere as well as
in the troposphere. Atmospheric chemistry is driven by solar radiation induced
photodissociation of atmospheric trace gases. Thus, the calculation of the actinic flux and
hence of the photodissociation frequencies is an essential part in the simulation of
atmospheric trace gas distributions.
The ICON-ART1
model is an extension of the non-hydrostatic modeling framework
ICON2,
jointly developed by the German Weather Service (DWD) and Max-Planck-Institute for
Meteorology (MPI-M), and is used for numerical weather prediction as well as for future
climate predictions. ICON-ART is developed with the goal to simulate interactions between
trace substances and the state of the atmosphere.
For the dynamics (transport and diffusion) of gaseous tracers, the original ICON tracer
framework is used. For the model physics, numerical time integration follows a process
splitting approach separating physical processes. Each process is called independently via an
interface module. Currently, the processes of emission, dry and wet deposition,
sedimentation, and first order chemical reactions are included.
In this study we introduce a new gas-phase chemistry module for ICON-ART in combination
with an online photolysis module. The new gas-phase chemical module uses the kpp
formalism3 and the photolysis
module is based on Fast-JX4,
which provides online calculation of actinic flux for a wavelength region down to 170 nm,
depending on the actual state of ozone, temperature, pressure, relative humidity and liquid
water path, resulting in photolysis rates which are usable for the simulation of tropospheric as
well as stratospheric trace gas distributions.
We will present first simulations of global ozone distribution by using the new gas-phase
chemistry module and photolysis module within ICON-ART to show the ability of
ICON-ART to investigate chemical mechanisms and transport of chemical trace gas
constitutions on a global scale. |
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