Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/gmd-2017-160
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Development and technical paper
17 Jul 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).
Revised mineral dust emissions in the atmospheric chemistry-climate model EMAC (based on MESSy 2.52)
Klaus Klingmüller1, Swen Metzger2, Mohamed Abdelkader1,3, Vlassis A. Karydis1, Georgiy L. Stenchikov3, Andrea Pozzer1, and Jos Lelieveld1,2 1Max Planck Institute for Chemistry, P.O. Box 3060, 55020 Mainz, Germany
2The Cyprus Institute, P.O. Box 27456, 1645 Nicosia, Cyprus
3King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
Abstract. To improve the aeolian dust budget calculations with the global ECHAM/MESSy atmospheric chemistry-climate model (EMAC) we have implemented new input data and updates of the emission scheme.

The data set comprises landcover classification, vegetation, clay fraction and topography. It is based on up-to-date observations, which is crucial to account for the rapid changes of deserts and semi-arid regions in recent decades. The new Moderate-resolution Imaging Spectroradiometer (MODIS) based landcover and vegetation data is time dependent, and the effect of long-term trends and variability of the relevant parameters is therefore considered by the emission scheme. All input data has a spatial resolution of at least 0.1° compared to 1° in the previous version, equipping the model for high resolution simulations.

We validate the updates by comparing results for the aerosol optical depth (AOD) at 550 nm wavelength from a one year simulation at T106 (about 1.1°) resolution with Aerosol Robotic Network (AERONET) and MODIS observations, and results for 10 μm dust AOD (DAOD) with Infrared Atmospheric Sounding Interferometer (IASI) retrievals. The update significantly improves agreement with the observations and is therefore recommended to be used in future simulations.


Citation: Klingmüller, K., Metzger, S., Abdelkader, M., Karydis, V. A., Stenchikov, G. L., Pozzer, A., and Lelieveld, J.: Revised mineral dust emissions in the atmospheric chemistry-climate model EMAC (based on MESSy 2.52), Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2017-160, in review, 2017.
Klaus Klingmüller et al.
Klaus Klingmüller et al.
Klaus Klingmüller et al.

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Short summary
More than one billion tons of mineral dust particles are raised into the atmosphere every year, which has a significant impact on climate, society and ecosystems. The location, time and amount of dust emissions depends on surface and wind conditions. In the atmospheric chemistry-climate model EMAC we have updated the relevant surface data and equations. Our validation shows that the updates substantially improve the agreement of model results and observations.
More than one billion tons of mineral dust particles are raised into the atmosphere every year,...
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