ACP Atmospheric Chemistry and Physics ACP Atmos. Chem. Phys. 1680-7324 Copernicus Publications Göttingen, Germany 10.5194/acp-12-4045-2012 Saharan dust event impacts on cloud formation and radiation over Western Europe Bangert M. 1 Nenes A. 2 3 Vogel B. 1 Vogel H. 1 Barahona D. 4 5 Karydis V. A. 2 Kumar P. 3 6 Kottmeier C. 1 Blahak U. 7 Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA Global Modeling and Assimilation Office, NASA GSFC, Greenbelt, MD, USA I.M. Systems Group, Rockville, MD, USA SABIC-Innovative Plastics, Selkirk, NY, USA Deutscher Wetterdienst, Offenbach, Germany 08 05 2012 12 9 4045 4063 Copyright: © 2012 M. Bangert et al. 2012 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://acp.copernicus.org/articles/12/4045/2012/acp-12-4045-2012.html The full text article is available as a PDF file from https://acp.copernicus.org/articles/12/4045/2012/acp-12-4045-2012.pdf

We investigated the impact of mineral dust particles on clouds, radiation and atmospheric state during a strong Saharan dust event over Europe in May 2008, applying a comprehensive online-coupled regional model framework that explicitly treats particle microphysics and chemical composition. Sophisticated parameterizations for aerosol activation and ice nucleation, together with two-moment cloud microphysics are used to calculate the interaction of the different particles with clouds depending on their physical and chemical properties. <br><br> The impact of dust on cloud droplet number concentration was found to be low, with just a slight increase in cloud droplet number concentration for both uncoated and coated dust. For temperatures lower than the level of homogeneous freezing, no significant impact of dust on the number and mass concentration of ice crystals was found, though the concentration of frozen dust particles reached up to 100 l<sup>−1</sup> during the ice nucleation events. Mineral dust particles were found to have the largest impact on clouds in a temperature range between freezing level and the level of homogeneous freezing, where they determined the number concentration of ice crystals due to efficient heterogeneous freezing of the dust particles and modified the glaciation of mixed phase clouds. <br><br> Our simulations show that during the dust events, ice crystals concentrations were increased twofold in this temperature range (compared to if dust interactions are neglected). This had a significant impact on the cloud optical properties, causing a reduction in the incoming short-wave radiation at the surface up to &minus;75 W m<sup>−2</sup>. Including the direct interaction of dust with radiation caused an additional reduction in the incoming short-wave radiation by 40 to 80 W m<sup>−2</sup>, and the incoming long-wave radiation at the surface was increased significantly in the order of +10 W m<sup>−2</sup>. <br><br> The strong radiative forcings associated with dust caused a reduction in surface temperature in the order of −0.2 to −0.5 K for most parts of France, Germany, and Italy during the dust event. The maximum difference in surface temperature was found in the East of France, the Benelux, and Western Germany with up to −1 K. This magnitude of temperature change was sufficient to explain a systematic bias in numerical weather forecasts during the period of the dust event.

 References Alfaro, S. and Gomes, L.: Modeling mineral aerosol production by wind erosion: Emission intensities and aerosol size distributions in source areas, J. Geophys. Res.-Atmos., 106, 18075–18084, <a href="http://dx.doi.org/10.1029/2000JD900339">https://doi.org/10.1029/2000JD900339</a>, 2001. Ansmann, A., Bosenberg, J., Chaikovsky, A., Comeron, A., Eckhardt, S., Eixmann, R., Freudenthaler, V., Ginoux, P., Komguem, L., Linne, H., Marquez, M., Matthias, V., Mattis, I., Mitev, V., Muller, D., Music, S., Nickovic, S., Pelon, J., Sauvage, L., Sobolewsky, P., Srivastava, M., Stohl, A., Torres, O., Vaughan, G., Wandinger, U., and Wiegner, M.: Long-range transport of Saharan dust to northern Europe: The 11-16 October 2001 outbreak observed with EARLINET, J. Geophys. Res.-Atmos., 108, 4783, <a href="http://dx.doi.org/10.1029/2003JD003757">https://doi.org/10.1029/2003JD003757</a>, 2003. Baldauf,&nbsp;M., Seifert,&nbsp;A., Förstner,&nbsp;J., Majewski,&nbsp;D., Raschendorfer,&nbsp;M., and Reinhardt,&nbsp;T.: Operational convective-scale numerical weather prediction with the COSMO model: description and sensitivities, Mon. Weather Rev., 139, 3887–3905, <a href="http://dx.doi.org/10.1175/MWR-D-10-05013.1">https://doi.org/10.1175/MWR-D-10-05013.1</a>, e-View, 2011. Bangert,&nbsp;M., Kottmeier,&nbsp;C., Vogel,&nbsp;B., and Vogel,&nbsp;H.: Regional scale effects of the aerosol cloud interaction simulated with an online coupled comprehensive chemistry model, Atmos. Chem. Phys., 11, 4411–4423, <a href="http://dx.doi.org/10.5194/acp-11-4411-2011">https://doi.org/10.5194/acp-11-4411-2011</a>, 2011. Barahona,&nbsp;D. and Nenes,&nbsp;A.: Parameterization of cirrus cloud formation in large-scale models: homogeneous nucleation, J. Geophys. Res.-Atmos., 113, D11211, <a href="http://dx.doi.org/10.1029/2007JD009355">https://doi.org/10.1029/2007JD009355</a>, 2008. Barahona,&nbsp;D. and Nenes,&nbsp;A.: Parameterizing the competition between homogeneous and heterogeneous freezing in cirrus cloud formation – monodisperse ice nuclei, Atmos. Chem. Phys., 9, 369–381, <a href="http://dx.doi.org/10.5194/acp-9-369-2009">https://doi.org/10.5194/acp-9-369-2009</a>, 2009a. Barahona,&nbsp;D. and Nenes,&nbsp;A.: Parameterizing the competition between homogeneous and heterogeneous freezing in ice cloud formation – polydisperse ice nuclei, Atmos. Chem. Phys., 9, 5933–5948, <a href="http://dx.doi.org/10.5194/acp-9-5933-2009">https://doi.org/10.5194/acp-9-5933-2009</a>, 2009b. Barahona,&nbsp;D., West,&nbsp;R.&nbsp;E.&nbsp;L., Stier,&nbsp;P., Romakkaniemi,&nbsp;S., Kokkola,&nbsp;H., and Nenes,&nbsp;A.: Comprehensively accounting for the effect of giant CCN in cloud activation parameterizations, Atmos. Chem. Phys., 10, 2467–2473, <a href="http://dx.doi.org/10.5194/acp-10-2467-2010">https://doi.org/10.5194/acp-10-2467-2010</a>, 2010a. Barahona,&nbsp;D., Rodriguez,&nbsp;J., and Nenes,&nbsp;A.: Sensitivity of the global distribution of cirrus ice crystal concentration to heterogeneous freezing,&nbsp;J. Geophys. Res.-Atmos., 115, D23213, <a href="http://dx.doi.org/10.1029/2010JD014273">https://doi.org/10.1029/2010JD014273</a>, 2010b. Blahak,&nbsp;U.: Towards a&nbsp;Better Representation of High Density Ice Particles in a&nbsp;State-of-the-Art Two-Moment Bulk Microphysical Scheme, Extended Abstract, International Conference on Clouds and Precipitation, Cancun, 7–11 July 2008, available at: <a href="http://cabernet.atmosfcu.unam.mx/ICCP-2008/abstracts/Program_on_line/Poster_07/Blahak_extended_1.pdf">http://cabernet.atmosfcu.unam.mx/ICCP-2008/abstracts/Program_on_line/Poster_07/Blahak_extended_1.pdf</a> (last access: 30 November 2011), 2008. Cantrell,&nbsp;W. and Heymsfield,&nbsp;A.: Production of ice in tropospheric clouds – a&nbsp;review, B.&nbsp;A.&nbsp;M. Meteorol. Soc., 86, 795–807, <a href="http://dx.doi.org/10.1175/BAMS-86-6-795">https://doi.org/10.1175/BAMS-86-6-795</a>, 2005. Cavazos,&nbsp;C., Todd,&nbsp;M.&nbsp;C., and Schepanski,&nbsp;K.: Numerical model simulation of the Saharan dust event of 6–11 March 2006 using the Regional Climate Model version 3 (RegCM3), J. Geophys. Res.-Atmos., 114, D12109, <a href="http://dx.doi.org/10.1029/2008JD011078">https://doi.org/10.1029/2008JD011078</a>, 2009. Chaboureau,&nbsp;J.-P., Richard,&nbsp;E., Pinty,&nbsp;J.-P., Flamant,&nbsp;C., Di&nbsp;Girolamo,&nbsp;P., Kiemle,&nbsp;C., Behrendt,&nbsp;A., Chepfer,&nbsp;H., Chiriaco,&nbsp;M., and Wulfmeyer,&nbsp;V.: Long-range transport of Saharan dust and its radiative impact on precipitation forecast: a&nbsp;case study during the convective and Orographically-induced Precipitation Study (COPS),&nbsp;Q.&nbsp;J. Roy. Meteor. Soc., 137, 236–251, <a href="http://dx.doi.org/10.1002/qj.719">https://doi.org/10.1002/qj.719</a>, 2011. D'Almeida, G.&nbsp;A.: A model for Saharan dust transport, J. Clim. Appl. Meteorol., 25, 903–916, <a href="http://dx.doi.org/10.1175/1520-0450(1986)025<0903:AMFSDT>2.0.CO;2">https://doi.org/10.1175/1520-0450(1986)025<0903:AMFSDT>2.0.CO;2</a>, 1986. Doms,&nbsp;G., Förstner,&nbsp;J., Heise,&nbsp;E., Herzog,&nbsp;H.-J., and Raschendorfer,&nbsp;M.: Nonhydrostatic Regional Model LM, Part II: Physical Parameterization, Tech. Rep., Deutscher Wetterdienst, Offenbach, 2005. Edwards,&nbsp;J.&nbsp;M., Havemann,&nbsp;S., Thelen,&nbsp;J.-C., and Baran,&nbsp;A.&nbsp;J.: A&nbsp;new parametrization for the radiative properties of ice crystals: comparison with existing schemes and impact in a&nbsp;GCM, Atmos. Res., 83, 19–35, <a href="http://dx.doi.org/10.1016/j.atmosres.2006.03.002">https://doi.org/10.1016/j.atmosres.2006.03.002</a>, 2007. EEA, 2011: Airbase - the european air quality database. Tech. rep., European Environment Agency, Copenhagen, <a href="{www.eea.europa.eu/data-and-maps/data/airbase-the-european-air-quality-database">{www.eea.europa.eu/data-and-maps/data/airbase-the-european-air-quality-database</a>}. Emmons,&nbsp;L.&nbsp;K., Walters,&nbsp;S., Hess,&nbsp;P.&nbsp;G., Lamarque,&nbsp;J.-F., Pfister,&nbsp;G.&nbsp;G., Fillmore,&nbsp;D., Granier,&nbsp;C., Guenther,&nbsp;A., Kinnison,&nbsp;D., Laepple,&nbsp;T., Orlando,&nbsp;J., Tie,&nbsp;X., Tyndall,&nbsp;G., Wiedinmyer,&nbsp;C., Baughcum,&nbsp;S.&nbsp;L., and Kloster,&nbsp;S.: Description and evaluation of the Model for Ozone and Related chemical Tracers, version 4 (MOZART-4), Geosci. Model Dev., 3, 43–67, <a href="http://dx.doi.org/10.5194/gmd-3-43-2010">https://doi.org/10.5194/gmd-3-43-2010</a>, 2010. Field,&nbsp;P.&nbsp;R., Möhler,&nbsp;O., Connolly,&nbsp;P., Krämer,&nbsp;M., Cotton,&nbsp;R., Heymsfield,&nbsp;A.&nbsp;J., Saathoff,&nbsp;H., and Schnaiter,&nbsp;M.: Some ice nucleation characteristics of Asian and Saharan desert dust, Atmos. Chem. Phys., 6, 2991–3006, <a href="http://dx.doi.org/10.5194/acp-6-2991-2006">https://doi.org/10.5194/acp-6-2991-2006</a>, 2006. Goudie, A. and Middleton, N.: Saharan dust storms: nature and consequences, Earth-Sci. Rev., 56, 179–204, <a href="http://dx.doi.org/10.1016/S0012-8252(01)00067-8">https://doi.org/10.1016/S0012-8252(01)00067-8</a>, 2001. Helmert, J., Heinold, B., Tegen, I., Hellmuth, O., and Wendisch, M.: On the direct and semidirect effects of Saharan dust over Europe: A modeling study, J. Geophys. Res.-Atmos., 112, D13208, <a href="http://dx.doi.org/10.1029/2006JD007444">https://doi.org/10.1029/2006JD007444</a>, 2007. Hoose,&nbsp;C., Lohmann,&nbsp;U., Erdin,&nbsp;R., and Tegen,&nbsp;I.: The global influence of dust mineralogical composition on heterogeneous ice nucleation in mixed-phase clouds, Environ. Res. Lett., 3, 025003, <a href="http://dx.doi.org/10.1088/1748-9326/3/2/025003">https://doi.org/10.1088/1748-9326/3/2/025003</a>, 2008. Hu,&nbsp;Y.&nbsp;X. and Stamnes,&nbsp;K.: An accurate parameterization of the radiative properties of water clouds suitable for use in climate models,&nbsp;J. Climate, 6, 728–742, 1993. Karydis,&nbsp;V., Kumar,&nbsp;P., Barahona,&nbsp;D., and Nenes,&nbsp;A.: On the effect of insoluble dust particles on global CCN and droplet number,&nbsp;J. Geophys. Res., 116, D23204, <a href="http://dx.doi.org/10.1029/2011JD016283">https://doi.org/10.1029/2011JD016283</a>, 2011. Klein,&nbsp;H., Nickovic,&nbsp;S., Haunold,&nbsp;W., Bundke,&nbsp;U., Nillius,&nbsp;B., Ebert,&nbsp;M., Weinbruch,&nbsp;S., Schuetz,&nbsp;L., Levin,&nbsp;Z., Barrie,&nbsp;L.&nbsp;A., and Bingemer,&nbsp;H.: Saharan dust and ice nuclei over Central Europe, Atmos. Chem. Phys., 10, 10211–10221, <a href="http://dx.doi.org/10.5194/acp-10-10211-2010">https://doi.org/10.5194/acp-10-10211-2010</a>, 2010. Knote, C., Brunner, D., Vogel, H., Allan, J., Asmi, A., Äijälä, M., Carbone, S., van&nbsp;der Gon, H.&nbsp;D., Jimenez, J.&nbsp;L., Kiendler-Scharr, A., Mohr, C., Poulain, L., Prévôt, A. S.&nbsp;H., Swietlicki, E., and Vogel, B.: Towards an online-coupled chemistry-climate model: evaluation of trace gases and aerosols in COSMO-ART, Geosci. Model Dev., 4, 1077–1102, <a href="http://dx.doi.org/10.5194/gmd-4-1077-2011">https://doi.org/10.5194/gmd-4-1077-2011</a>, 2011. Koop,&nbsp;T., Luo,&nbsp;B.&nbsp;P., Tsias,&nbsp;A., and Peter,&nbsp;T.: Water activity as the determinant for homogeneous ice nucleation in aqueous solutions, Nature, 406, 611–614, 2000. Kumar,&nbsp;P., Sokolik,&nbsp;I.&nbsp;N., and Nenes,&nbsp;A.: Parameterization of cloud droplet formation for global and regional models: including adsorption activation from insoluble CCN, Atmos. Chem. Phys., 9, 2517–2532, <a href="http://dx.doi.org/10.5194/acp-9-2517-2009">https://doi.org/10.5194/acp-9-2517-2009</a>, 2009. Kumar,&nbsp;P., Sokolik,&nbsp;I.&nbsp;N., and Nenes,&nbsp;A.: Measurements of cloud condensation nuclei activity and droplet activation kinetics of fresh unprocessed regional dust samples and minerals, Atmos. Chem. Phys., 11, 3527–3541, <a href="http://dx.doi.org/10.5194/acp-11-3527-2011">https://doi.org/10.5194/acp-11-3527-2011</a>, 2011. Levin,&nbsp;Z., Ganor,&nbsp;E., and Gladstein,&nbsp;V.: The effects of desert particles coated with sulfate on rain formation in the Eastern Mediterranean, J. Appl. Meteorol., 35, 1511–1523, 1996. Lohmann,&nbsp;U. and Diehl,&nbsp;K.: Sensitivity studies of the importance of dust ice nuclei for the indirect aerosol effect on stratiform mixed-phase clouds, J. Atmos. Sci., 63, 968–982, 2006. Lowell,&nbsp;S., Shields,&nbsp;J.&nbsp;E., Thomas,&nbsp;M.&nbsp;A., and Thommes,&nbsp;M.: Characterization of porous solids and powders: surface area, pore size and density, in: Particle Technology Series, vol.&nbsp;16, Kluwer Academic Publishers, Dordrecht, 2004. Lu, H. and Shao, Y.: A new model for dust emission by saltation bombardment, J. Geophys. Res.-Atmos., 104, 16827–16841, <a href="http://dx.doi.org/10.1029/1999JD900169">https://doi.org/10.1029/1999JD900169</a>, 1999. Lundgren,&nbsp;K.: Direct Radiative Effects of Sea Salt on the Regional Scale, Ph.D. thesis, Karlsruhe Institute of Technology, Karlsruhe, 2010. Menzel,&nbsp;W.&nbsp;P., Frey,&nbsp;R.&nbsp;A., Zhang,&nbsp;H., Wylie,&nbsp;D.&nbsp;P., Moeller,&nbsp;C.&nbsp;C., Holz,&nbsp;R.&nbsp;E., Maddux,&nbsp;B., Baum,&nbsp;B.&nbsp;A., Strabala,&nbsp;K.&nbsp;I., and Gumley,&nbsp;L.&nbsp;E.: MODIS global cloud-top pressure and amount estimation: algorithm description and results,&nbsp;J. Appl. Meteorol. Clim., 47, 1175–1198, <a href="http://dx.doi.org/10.1175/2007JAMC1705.1">https://doi.org/10.1175/2007JAMC1705.1</a>, 2008. Min,&nbsp;Q. and Li,&nbsp;R.: Longwave indirect effect of mineral dusts on ice clouds, Atmos. Chem. Phys., 10, 7753–7761, <a href="http://dx.doi.org/10.5194/acp-10-7753-2010">https://doi.org/10.5194/acp-10-7753-2010</a>, 2010. Min,&nbsp;Q.-L., Li,&nbsp;R., Lin,&nbsp;B., Joseph,&nbsp;E., Wang,&nbsp;S., Hu,&nbsp;Y., Morris,&nbsp;V., and Chang,&nbsp;F.: Evidence of mineral dust altering cloud microphysics and precipitation, Atmos. Chem. Phys., 9, 3223–3231, <a href="http://dx.doi.org/10.5194/acp-9-3223-2009">https://doi.org/10.5194/acp-9-3223-2009</a>, 2009. Möhler,&nbsp;O., Field,&nbsp;P.&nbsp;R., Connolly,&nbsp;P., Benz,&nbsp;S., Saathoff,&nbsp;H., Schnaiter,&nbsp;M., Wagner,&nbsp;R., Cotton,&nbsp;R., Krämer,&nbsp;M., Mangold,&nbsp;A., and Heymsfield,&nbsp;A.&nbsp;J.: Efficiency of the deposition mode ice nucleation on mineral dust particles, Atmos. Chem. Phys., 6, 3007–3021, <a href="http://dx.doi.org/10.5194/acp-6-3007-2006">https://doi.org/10.5194/acp-6-3007-2006</a>, 2006. Morales,&nbsp;R. and Nenes,&nbsp;A.: Characteristic updrafts for computing distribution-averaged cloud droplet number, autoconversion rate and effective radius,&nbsp;J. Geophys. Res., 115, D18220, <a href="http://dx.doi.org/10.1029/2009JD013233">https://doi.org/10.1029/2009JD013233</a>, 2010. Niemand,&nbsp;M., Möhler,&nbsp;O., Vogel,&nbsp;B., Vogel,&nbsp;H., Hoose,&nbsp;C., Connolly,&nbsp;P., Klein,&nbsp;H., Bingemer,&nbsp;H., DeMott,&nbsp;P., Skrotzki,&nbsp;S., and Leisner,&nbsp;T.: Parameterization of immersion freezing on mineral dust particles: an application in a&nbsp;regional scale model,&nbsp;J. Atmos. Sci., in press, 2012. Noppel,&nbsp;H., Blahak,&nbsp;U., Beheng,&nbsp;K.&nbsp;D., and Seifert,&nbsp;A.: A&nbsp;Two-Moment Cloud Microphysics Scheme with Two Process-Separated Modes of Graupel, 12. AMS Conference on Cloud Physics, 10–14 July 2006, Madison, Wisconsin, available at: <a href="http://ams.confex.com/ams/pdfpapers/113532.pdf">http://ams.confex.com/ams/pdfpapers/113532.pdf</a> (last access: 30 November 2011), 2006. Perez,&nbsp;C., Nickovic,&nbsp;S., Pejanovic,&nbsp;G., Baldasano,&nbsp;J.&nbsp;M., and Oezsoy,&nbsp;E.: Interactive dust-radiation modeling: a&nbsp;step to improve weather forecasts,&nbsp;J. Geophys. Res.-Atmos., 111, D16206, <a href="http://dx.doi.org/10.1029/2005JD006717">https://doi.org/10.1029/2005JD006717</a>, 2006. Phillips,&nbsp;V.&nbsp;T.&nbsp;J., DeMott,&nbsp;P.&nbsp;J., and Andronache,&nbsp;C.: An empirical parameterization of heterogeneous ice nucleation for multiple chemical species of aerosol,&nbsp;J. Atmos. Sci., 65, 2757–2783, <a href="http://dx.doi.org/10.1175/2007JAS2546.1">https://doi.org/10.1175/2007JAS2546.1</a>, 2008. Pradelle,&nbsp;F. and Cautenet,&nbsp;G.: Radiative and microphysical interactions between marine stratocumulus clouds and Saharan dust – 2. Modeling, J. Geophys. Res.-Atmos., 107, 4413, <a href="http://dx.doi.org/10.1029/2000JD000156">https://doi.org/10.1029/2000JD000156</a>, 2002. Pregger,&nbsp;T., Thiruchittampalam,&nbsp;B., and Friedrich,&nbsp;R.: Ermittlung von Emissionsdaten zur Untersuchung der Klimawirksamkeit von Ru{ß}partikeln in Baden-Württemberg, Final report, IER Universität Stuttgart, Stuttgart, 2007. Pruppacher, H.&nbsp;R. and Klett, J.&nbsp;D.: <i>Microphysics of Clouds and Precipitation</i>, 2nd ed., Kluwer Academic Publishers, Dordrecht, Boston, London, 954 pp., 1997. Riemer,&nbsp;N., Vogel,&nbsp;B., Vogel,&nbsp;H., and Fiedler,&nbsp;F.: Modeling aerosols on the mesoscale-γ: treatment of soot aerosol and its radiative effects, J. Geophys. Res., 108, 4601, <a href="http://dx.doi.org/10.1029/2003JD003448">https://doi.org/10.1029/2003JD003448</a>, 2003. Ritter,&nbsp;B. and Geleyn,&nbsp;J.&nbsp;F.: A&nbsp;comprehensive radiation scheme for numerical weather prediction models with potential applications in climate simulations, Mon. Weather Rev., 120, 303–325, <a href="http://dx.doi.org/10.1175/1520-0493(1992)120<0303:ACRSFN>2.0.CO;2">https://doi.org/10.1175/1520-0493(1992)120<0303:ACRSFN>2.0.CO;2</a>, 1992. Rosenfeld,&nbsp;D., Rudich,&nbsp;Y., and Lahav,&nbsp;R.: Desert dust suppressing precipitation: a&nbsp;possible desertification feedback loop, P. Natl. Acad. Sci., 98, 5975–5980, <a href="http://dx.doi.org/10.1073/pnas.101122798">https://doi.org/10.1073/pnas.101122798</a>, 2001. Seifert,&nbsp;A. and Beheng,&nbsp;K.&nbsp;D.: A&nbsp;two-moment cloud microphysics parameterization for mixed-phase clouds. Part 1: Model description, Meteorol. Atmos. Phys., 92, 45–66, <a href="http://dx.doi.org/10.1007/s00703-005-0112-4">https://doi.org/10.1007/s00703-005-0112-4</a>, 2006. Seifert,&nbsp;A., Khain,&nbsp;A., Pokrovsky,&nbsp;A., and Beheng,&nbsp;K.&nbsp;D.: A&nbsp;comparison of spectral bin and two-moment bulk mixed-phase cloud microphysics, Atmos. Res., 80, 46–66, 2006. Seifert,&nbsp;P., Ansmann,&nbsp;A., Mattis,&nbsp;I., Wandinger,&nbsp;U., Tesche,&nbsp;M., Engelmann,&nbsp;R., Mueller,&nbsp;D., Perez,&nbsp;C., and Haustein,&nbsp;K.: Saharan dust and heterogeneous ice formation: Eleven years of cloud observations at a&nbsp;Central European EARLINET site, J. Geophys. Res., 115, D20201, <a href="http://dx.doi.org/10.1029/2009JD013222">https://doi.org/10.1029/2009JD013222</a>, 2010. Seifert,&nbsp;A., Köhler,&nbsp;C., and Beheng,&nbsp;K.&nbsp;D.: Aerosol-cloud-precipitation effects over Germany as simulated by a convective-scale numerical weather prediction model, Atmos. Chem. Phys. Discuss., 11, 20203–20243, <a href="http://dx.doi.org/10.5194/acpd-11-20203-2011">https://doi.org/10.5194/acpd-11-20203-2011</a>, 2011. Solomos,&nbsp;S., Kallos,&nbsp;G., Kushta,&nbsp;J., Astitha,&nbsp;M., Tremback,&nbsp;C., Nenes,&nbsp;A., and Levin,&nbsp;Z.: An integrated modeling study on the effects of mineral dust and sea salt particles on clouds and precipitation, Atmos. Chem. Phys., 11, 873–892, <a href="http://dx.doi.org/10.5194/acp-11-873-2011">https://doi.org/10.5194/acp-11-873-2011</a>, 2011. Sorjamaa,&nbsp;R. and Laaksonen,&nbsp;A.: The effect of H<sub>2O</sub> adsorption on cloud drop activation of insoluble particles: a theoretical framework, Atmos. Chem. Phys., 7, 6175–6180, <a href="http://dx.doi.org/10.5194/acp-7-6175-2007">https://doi.org/10.5194/acp-7-6175-2007</a>, 2007. Stanelle,&nbsp;T., Vogel,&nbsp;B., Vogel,&nbsp;H., Bäumer,&nbsp;D., and Kottmeier,&nbsp;C.: Feedback between dust particles and atmospheric processes over West Africa during dust episodes in March 2006 and June 2007, Atmos. Chem. Phys., 10, 10771–10788, <a href="http://dx.doi.org/10.5194/acp-10-10771-2010">https://doi.org/10.5194/acp-10-10771-2010</a>, 2010. Sullivan,&nbsp;R.&nbsp;C., Guazzotti,&nbsp;S.&nbsp;A., Sodeman,&nbsp;D.&nbsp;A., and Prather,&nbsp;K.&nbsp;A.: Direct observations of the atmospheric processing of Asian mineral dust, Atmos. Chem. Phys., 7, 1213–1236, <a href="http://dx.doi.org/10.5194/acp-7-1213-2007">https://doi.org/10.5194/acp-7-1213-2007</a>, 2007. Swap, R., Ulanski, S., Cobbett, M., and Garstang, M.: Temporal and spatial characteristics of Saharan dust outbreaks, J. Geophys. Res.-Atmos., 101, 4205–4220, <a href="http://dx.doi.org/10.1029/95JD03236">https://doi.org/10.1029/95JD03236</a>, 1996. Tegen, I.: Modeling the mineral dust aerosol cycle in the climate system, Quaternary Sci. Rev., 22, 1821–1834, <a href="http://dx.doi.org/10.1016/S0277-3791(03)00163-X">https://doi.org/10.1016/S0277-3791(03)00163-X</a>, 2003. Tiedtke,&nbsp;M.: A&nbsp;comprehensive mass flux scheme for cumulus parameterization in large-scale models, Mon. Weather Rev., 117, 1779–1800, 1989. Vogel, B., Hoose, C., Vogel, H., and Kottmeier, C.: A model of dust transport applied to the Dead Sea Area, Meteorol. Z., 15, 611–624, <a href="http://dx.doi.org/10.1127/0941-2948/2006/0168">https://doi.org/10.1127/0941-2948/2006/0168</a>, 2006. Vogel,&nbsp;B., Vogel,&nbsp;H., Bäumer,&nbsp;D., Bangert,&nbsp;M., Lundgren,&nbsp;K., Rinke,&nbsp;R., and Stanelle,&nbsp;T.: The comprehensive model system COSMO-ART – Radiative impact of aerosol on the state of the atmosphere on the regional scale, Atmos. Chem. Phys., 9, 8661–8680, <a href="http://dx.doi.org/10.5194/acp-9-8661-2009">https://doi.org/10.5194/acp-9-8661-2009</a>, 2009. Waliser,&nbsp;D.&nbsp;E., Li,&nbsp;J.&nbsp;L.&nbsp;F., L'Ecuyer,&nbsp;T.&nbsp;S., and Chen,&nbsp;W.&nbsp;T.: The impact of precipitating ice and snow on the radiation balance in global climate models, Geophys. Res. Lett., 38, L06802, <a href="http://dx.doi.org/10.1029/2010GL046478">https://doi.org/10.1029/2010GL046478</a>, 2011. Wiacek,&nbsp;A., Peter,&nbsp;T., and Lohmann,&nbsp;U.: The potential influence of Asian and African mineral dust on ice, mixed-phase and liquid water clouds, Atmos. Chem. Phys., 10, 8649–8667, <a href="http://dx.doi.org/10.5194/acp-10-8649-2010">https://doi.org/10.5194/acp-10-8649-2010</a>, 2010. Yin,&nbsp;Y. and Chen,&nbsp;L.: The effects of heating by transported dust layers on cloud and precipitation: a numerical study, Atmos. Chem. Phys., 7, 3497–3505, <a href="http://dx.doi.org/10.5194/acp-7-3497-2007">https://doi.org/10.5194/acp-7-3497-2007</a>, 2007. Zubler,&nbsp;E.&nbsp;M., Folini,&nbsp;D., Lohmann,&nbsp;U., Lüthi,&nbsp;D., Muhlbauer,&nbsp;A., Pousse-Nottelmann,&nbsp;S., Schär,&nbsp;C., and Wild,&nbsp;M.: Implementation and evaluation of aerosol and cloud microphysics in a&nbsp;regional climate model,&nbsp;J. Geophys. Res., 116, D02211, <a href="http://dx.doi.org/10.1029/2010JD014572">https://doi.org/10.1029/2010JD014572</a>, 2011.