References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-6-5495-2006

Simulating aerosol microphysics with the ECHAM4/MADE GCM – Part II: Results from a first multiannual simulation of the submicrometer aerosol

Lauer

¹ Hendricks

DLR Institute of Atmospheric Physics, Oberpfaffenhofen, 82234 Wessling, Germany

06 12 2006

6 12 5495 5513

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First results of a multiannual integration with the new global aerosol model system ECHAM4/MADE are presented. This model system enables simulations of the particle number concentration and size-distribution, which is a fundamental innovation compared to previous global model studies considering aerosol mass cycles only. The data calculated by the model provide detailed insights into the properties of the global submicrometer aerosol regarding global burden, chemical composition, atmospheric residence time, particle number concentration and size-distribution. The aerosol components considered by the model are sulfate (SO4), nitrate (NO3), ammonium (NH4), black carbon (BC), organic matter (OM), mineral dust, sea salt and aerosol water. The simulated climatological annual mean global atmospheric burdens (residence times) of the dominant submicrometer aerosol components are 2.25 Tg (4.5 d) for SO4, 0.46 Tg (4.5 d) for NH4, 0.26 Tg (6.6 d) for BC, and 1.77 Tg (6.5 d) for OM. The contributions of individual processes such as emission, nucleation, condensation or dry and wet deposition to the global sources and sinks of specific aerosol components and particle number concentration are quantified. Based on this analysis, the significance of aerosol microphysical processes (nucleation, condensation, coagulation) is evaluated by comparison to the importance of other processes relevant for the submicrometer aerosol on the global scale. The results reveal that aerosol microphysics are essential for the simulation of the particle number concentration and important but not vital for the simulation of particle mass concentration. Hence aerosol microphysics should be taken into account in simulations of atmospheric processes showing a significant dependence on aerosol particle number concentration. The analysis of the vertical variation of the microphysical net production and net depletion rates performed for particle number concentration, sulfate mass and black carbon mass concentration unveils the dominant source and sink regions. Prominent features can be attributed to dominant microphysical processes such as nucleation in the upper troposphere or wet deposition in the lower troposphere. Regions of efficient coagulation can be identified.

References 1

Ackermann, I J., Hass, H., Memmesheimer, M., Ebel, A., Binkowski, F S., and Shankar, U.: Modal Aerosol Dynamics for Europe: Development and first applications, Atmos. Environ., 32, 2981–2999, 1998.

Adams, P J., Seinfeld, J H., and Koch, D M.: Global concentrations of tropospheric sulfate, nitrate and ammonium simulated in a general circulation model, J. Geophys. Res., 104, 13 791–13 823, 1999.

Adams, P J. and Seinfeld, J H.: Predicting global aerosol size distributions in general circulation models, J. Geophys. Res., 107(D19), 4370, 10.1029/2001JD001010, 2002.

Berglen, T F., Berntsen, T K., Isaksen, I S A., and Sundet, J K.: A global model of the coupled sulfur/oxidant chemistry in the troposphere: The sulfur cycle, J. Geophys. Res., 109, D19310, doi:10.1029/2003JD003948, 2004.

Binkowski, F S. and Roselle, S J.: Models-3 Community Multiscale Air Quality (CMAQ) model aerosol component, 1. Model description, J. Geophys. Res., 108(D6), 4183, doi:10.1029/2001JD001409, 2003.

Chin, M., Rood, R B., Lin, S.-J., Müller, J.-F., and Thompson, A.: Atmospheric sulfur cycle simulated in the global model GOCART: Model description and global properties, J. Geophys. Res., 105, 24 671–24 687, 2000.

Chung, S H. and Seinfeld, J H.: Global distribution and climate forcing of carbonaceous aerosols, J. Geophys. Res., 107(D19), 4407, doi:10.1029/2001JD001397, 2002.

Clarke, A D. and Kapustin, V N.: A Pacific Aerosol Survey. Part I: A Decade of Data on Particle Production, Transport, Evolution, and Mixing in the Troposphere, J. Atmos. Sci., 59, 363–382, 2002.

Cooke, W F., Ramaswamy, V., and Kasibhatla, P.: A general circulation model study of the global carbonaceous aerosol distribution, J. Geophys. Res, 107(D16), 4279, doi:10.1029/2001JD001274, 2002.

Cooke, W F. and Wilson, J J N.: A global black carbon aerosol model, J. Geophys. Res., 101, 19 395–19 409, 1996.

Easter, R C., Ghan, S J., Zhang, Y., Saylor, R D., Chapman, E G., Laulainen, N S., Abdul-Razzak, H., Leung, L R., Bian, X., and Zaveri, R A.: MIRAGE: Model description and evaluation of aerosols and trace gases, J. Geophys. Res., 109, D20210, doi:10.1029/2004JD004571, 2004.

Feichter, J., Kjellström, E., Rodhe, H., Dentener, F., Lelieveld, J., and Roelofs, G.-J.: Simulation of the tropospheric sulfur cycle in a global climate model, Atmos. Environ., 30, 1693–1707, 1996.

Gong, S L., Barrie, L A., Blanchet, J.-P., von Salzen, K., Lohmann, U., Lesins, G., Spacek, L., Zhang, L M., Girard, E., Lin, H., Leaitch, R., Leighton, H., Chylek, P., and Huang, P.: Canadian Aerosol Module: A size-segregated simulation of atmospheric aerosol processes for climate and air quality models, 1. Module development, J. Geophys. Res., 108(D1), 4007, doi:10.1029/2001JD002002, 2003.

Jacobson, M Z.: Control of fossil-fuel particulate black carbon and organic matter, possibly the most effective method of slowing global warming, J. Geophys. Res, 107(D19), 4410, doi:10.1029/2001JD001376, 2002.

Koch, D.: Transport and direct radiative forcing of carbonaceous and sulfate aerosols in the GISS GCM, J. Geophys. Res., 106(D17), 20 311–20 332, 2001.

Koch, D., Schmidt, G A., and Field, C V.: Sulfur, sea salt, and radionuclide aerosols in GISS ModelE, J. Geophys. Res., 111, D06206, doi:10.1029/2004JD005550, 2006.

Lauer, A., Hendricks, J., Ackermann, I., Schell, B., Hass, H., and Metzger, S.: Simulating aerosol microphysics with the ECHAM/MADE GCM – Part I: Model description and comparison with observations, Atmos. Chem. Phys., 5, 3251–3276, 2005.

Liousse, C., Penner, J E., Chuang, C., Walton, J J., Eddleman, H., and Cachier, H.: A global three-dimensional model study of carbonaceous aerosols, J. Geophys. Res., 101, 19 411–19 432, 1996.

Lohmann, U., Feichter, J., Chuang, C C., and Penner, J E.: Prediction of the number of cloud droplets in the ECHAM GCM, J. Geophys. Res., 104, 9169–9198, 1999a.

Lohmann, U., von Salzen, K., McFarlane, N., Leighton, H G., and Feichter, J.: Tropospheric sulfur cycle in the Canadian general circulation model, J. Geophys. Res., 104, 26 833–26 858, 1999b.

Roeckner, E., Arpe, K., Bengtsson, L., Christoph, M., Claussen, M., Dümenil, L., Esch, M., Giorgetta, M., Schlese, U., and Schulzweida, U.: The atmospheric general circulation model ECHAM-4: Model description and simulation of present-day climate, Max Planck Institute for Meteorology, Report No 218, Hamburg, Germany, ISSN 0937-1060, 1996.

Roeckner, E., Bäuml, G., Bonaventura, L., Brokopf, R., Esch, M., Giorgetta, M., Hagemann, S., Kirchner, I., Kornblueh, L., Manzini, E., Rhodin, A., Schlese, U., Schulzweida, U., and Tompkins, A.: The atmospheric general circulation model ECHAM5, Part I: Model description, Max Planck Institute for Meteorology, Report No 349, Hamburg, Germany ISSN 0937-1060, 2003.

Spracklen, D. V., Pringle, K J., Carslaw, K S., Chipperfield, M P., and Mann, G W.: A global off-line model of size-resolved aerosol microphysics: I. Model development and prediction of aerosol properties, Atmos. Chem. Phys., 5, 2227–2252, 2005a.

Spracklen, D V., Pringle, K J., Carslaw, K S., Chipperfield, M P., and Mann, G W.: A global off-line model of size-resolved aerosol microphysics: II. Identification of key uncertainties, Atmos. Chem. Phys., 5, 3233–3250, 2005b.

Stier, P., Feichter, J., Kinne, S., Kloster, S., Vignati, E., Wilson, J., Ganzeveld, L., Tegen, I., Werner, M., Balkanski, Y., Schulz, M., and Boucher, O.: The aerosol-climate model ECHAM5-HAM, Atmos. Chem. Phys., 5, 1125–1156, 2005.

Takemura, T., Okamoto, H., Maruyama, Y., Numaguti, A., Higurashi, A., and Nakajima, T.: Global three-dimensional simulation of aerosol optical thickness distribution of various origins, J. Geophys. Res. 105(D14), 17 853–17 873, 2000.

Tegen, I. and Lacis, A A.: Modeling of particle size distribution and its influence on the radiative properties of mineral dust aerosol, J. Geophys. Res., 101(D14), 19 237–19 244, 1996.

Textor, C., Schulz, M., Guibert, S., Kinne, S., Balkanski, Y., Bauer, S., Berntsen, T., Berglen, T., Boucher, O., Chin, M., Dentener, F., Diehl, T., Easter, R., Feichter, H., Fillmore, D., Ghan, S., Ginoux, P., Gong, S., Grini, A., Hendricks, J., Horowitz, L., Huang, P., Isaksen, I., Iversen, T., Kloster, S., Koch, D., Kirkevåg, A., Kristjansson, J E., Krol, M., Lauer, A., Lamarque, J F., Liu, X., Montanaro, V., Myhre, G., Penner, J., Pitari, G., Reddy, S., Seland, Ø., Stier, P., Takemura, T., and Tie, X.: Analysis and quantification of the diversities of aerosol life cycles within AeroCom, Atmos. Chem. Phys., 6, 1777–1813, 2006.

Whitby, K T.: The physical characteristics of sulfur aerosols, Atmos. Environ., 12, 135–159, 1978.