Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
doi:10.5194/gmd-2016-259
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Model description paper
24 Oct 2016
Review status
This discussion paper is under review for the journal Geoscientific Model Development (GMD).
A new module for trace gas emissions in ICON-ART 2.0: A sensitivity study focusing on acetone emissions and concentrations
Michael Weimer1,2, Jennifer Schröter2, Johannes Eckstein2, Konrad Deetz2, Marco Neumaier2, Garlich Fischbeck2, Daniel Rieger2, Heike Vogel2, Bernhard Vogel2, Thomas Reddmann2, Oliver Kirner1, Roland Ruhnke2, and Peter Braesicke2 1Steinbuch Centre for Computing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
2Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Abstract. We present a new emissions module for the ICON (ICOsahedral Non-hydrostatic)-ART (Aerosols and Reactive Trace gases) modelling framework. The emissions module processes external flux data sets and increments the tracer volume mixing ratios in the boundary layer accordingly. In addition, the module for online calculations of biogenic emissions (MEGAN2.1) is implemented in ICON-ART and can replace the offline biogenic emission data sets.

The performance of the emissions module is illustrated with simulations of acetone, using a simplified chemical depletion mechanism based on a reaction with OH and photolysis only.

In our model setup, we calculate a tropospheric acetone lifetime of 33 days, which is in good agreement with the literature. We compare our results with airborne IAGOS-CARIBIC measurements in the upper troposphere and lowermost stratosphere (UTLS) in terms of phase and amplitude of the annual cycle. In all our ICON-ART simulations the general seasonal variability is well represented but questions remain concerning the magnitude of the acetone emissions and its atmospheric lifetime.

We conclude that the new emissions module performs well and allows the simulation of the annual cycles of emissions dominatedconcentrations even with a simple chemistry only.


Citation: Weimer, M., Schröter, J., Eckstein, J., Deetz, K., Neumaier, M., Fischbeck, G., Rieger, D., Vogel, H., Vogel, B., Reddmann, T., Kirner, O., Ruhnke, R., and Braesicke, P.: A new module for trace gas emissions in ICON-ART 2.0: A sensitivity study focusing on acetone emissions and concentrations, Geosci. Model Dev. Discuss., doi:10.5194/gmd-2016-259, in review, 2016.
Michael Weimer et al.
Michael Weimer et al.
Michael Weimer et al.

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Short summary
In this paper, the new module for trace gas emissions in the online coupled modelling framework ICON-ART for atmospheric chemistry is presented. Algorithms for offline and online calculation of the emissions are described. The module is validated with airborne measurements of acetone in the upper troposphere and lowermost stratosphere. It is shown that the module performs well and allows the simulation of annual cycles of emission driven trace gases.
In this paper, the new module for trace gas emissions in the online coupled modelling framework...
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