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Michael Herzog

Michael Herzog

Moran Lecturer in Climate Research

Atmospheric Science: Numerical Modelling of dynamical and microphysical processes from local to global scales.



  • 2007 - present: University Lecturer, Department of Geography, University of Cambridge
  • 2005 - 2007: Visiting Scientist, NOAA Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey
  • 2001 - 2005: Assistant Research Scientist, Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan
  • 1999 - 2000: Postdoctoral Fellow, Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan
  • 1998: Postdoctoral Fellow, Department of Volcanology and Petrology, Geomar Research Institute Kiel, Germany


  • Ph.D. in Geophysical Sciences, Max-Planck-Institute of Meteorology, Hamburg, Germany
  • M.Sc. in Physics, University of Bonn, Germany


My research activities and interests include:

  • development of atmospheric models from local to global scales
  • modelling of convective clouds and plumes
  • role of convection in the climate system, understanding of the hydrological cycle in present and future climate
  • understanding of the role of aerosols in present and future climate, impact of aerosols on dynamical and microphysical processes

PhD Research Opportunities

I am happy to discuss PhD project ideas via email. As part of the NERC Doctoral Training Programme I am currently offering the following projects:


  • Peters N., A. Hoffmann, T. Barnie, M. Herzog, C. Oppenheimer (2014): Use of motion estimation algorithms for improved flux measurements using SO2 cameras, J. Volcanl. Geotherm. Res., doi:10.1016/j.jvolgeores.2014.08.031.
  • Reutter P., J. Trentmann, A. Seifert, P. Neis, H. Su, D. Chang, M. Herzog, H. Wernli, M.O. Andreae, and U. Pöschl (2014): 3-D model simulations of dynamical and microphysical interactions in pyro-convective clouds under idealized conditions, Atmos. Chem. Phys., 14, 7573-7583, doi:10.5194/acp-14-7573-2014.
  • B.T. McCormick, M. Herzog, J. Yang, M. Edmonds,T.A. Mather, S.A. Carn, S. Hidalgo, B. Langmann (2014): A comparison of satellite- and ground-based measurements of SO2 emissions from Tungurahua volcano, Ecuador, J. Geophys. Res., doi:10.1002/2013JD019771.
  • Gerken T., W. Babel, F. Sun, M. Herzog, Y. Ma, T. Foken, H.-F. Graf (2013): Uncertainty in atmospheric profiles and its impact on modeled convection development at Nam Co Lake, Tibetan Plateau, Journal of Geophysical Research, Atmospheres, 118, 1-15, doi:10.1002/2013JD020647.
  • Gerken T., T. Biermann , W. Babel, M. Herzog, Y. Ma, T. Foken, H.-F. Graf (2013): A modelling investigation into lake-breeze development and convection triggering in the Nam Co Lake basin, Tibetan Plateau, Theoretical and Applied Climatology, 1-9, doi: 10.1007/s00704-013-0987-9.
  • Montopoli M., D. Cimini, M. Lamantea, M. Herzog, H.-F. Graf, and F.S. Marzano (2013): Microwave radiometric remote sensing of volcanic ash clouds from space: model and data analysis, IEEE Transactions on Geoscience and Remote Sensing, 13(9), 4678-4691, doi:10.1109/TGRS.2013.2260343.
  • Marzano F.S., M. Lamantea, M. Montopoli, M. Herzog, H.-F. Graf, D. Cimini (2013): Microwave remote sensing of the Plinian eruption due to the Grimsvoetn Icelandic volcano in May 2011. Remote Sensing of Environment, 129, 168-184,
  • Griffiths P.T., J.-S. Borlace, P.J. Gallimore, M. Kalberer, M. Herzog, F.D. Pope (2012): Hygroscopic growth and cloud activation of pollen: a laboratory and modelling study. Atmospheric Science Letters, 13, 289-295, doi:10.1002/asl.397.
  • Gerken T., W. Babel, A. Hoffmann, T. Biermann, M. Herzog, A. Friend, Y. Ma, and H.-F.Graf (2012): Turbulent Flux modelling with a simple 2-layer soil model using an extrapolated surface temperature. Hydrol. Earth Syst. Sci., 16, 1095-10309, doi:10.5194/hess-16-1095-2012.
  • Van Eaton A.R., M. Herzog, C.J.N Wilson, and J. McGregor (2012): Dynamics of large-scale 'wet' eruptions: Microphysical controls on ascent of phreatoplinian ash clouds using a case study from the 27 ka Oruanui eruption of Taupo volcano, New Zealand. Journal of Geophysical Research, Solid Earth, 117, B03203, doi:10.1029/2011JB008892.
  • Zhang W., H.-F. Graf, Y. Leung, M. Herzog (2012): Different El Nino Types and Tropical Cyclone Landfall in East Asia, Journal of Climate, doi:10.1175/JCLI-D-11-00488.1.
  • Wagner T., H.-F. Graf. and M. Herzog (2011): Reply to the comment on "An Ensemble Cumulus Convection Parameterization with Explicit Cloud Treatment". J. Atmos. Sci., 68(7), 1545-1546, doi:10.1175/2011JAS3741.1.
  • Herzog M. and H.-F. Graf (2010): Applying the three-dimensional model ATHAM to volcanic plumes: Dynamic of large co-ignimbrite eruptions and associated injection heights for volcanic gases. Geophys. Res. Lett., 37, L19807, doi:10.1029/2010GL044986.
  • Tupper A., C. Textor, M. Herzog, H.-F. Graf, and M. S. Richards (2009): Tall clouds from small eruptions: the sensitivity of eruption height and fine ash content to tropospheric instability. Nat. Hazards, 51, pp. 375-401, doi 10.1007/11069-009-9433-9.
  • Luderer G., J. Trentmann, K. Hungershöfer, M. Herzog, M. Fromm, and M. O. Andreae (2007): Small-scale Mixing Processes Enhancing Troposphere-to-Stratosphere Transport by Pyro-Cumulonimbus Storms. Atmos. Chem. Phys. Discuss., 7, pp. 10371-10403.
  • Rotstayn, L. D., W. Cai, M. R. Dix, G. D. Farquhar, Y. Feng, P. Ginoux, M. Herzog, A. Ito, J. E. Penner, M. L. Roderick, M. Wang (2007): Have Australian Rainfall and Cloudiness Increased due to the Remote Effects of Asian Anthropogenic Aerosols?, J. Geophys. Res., 112, D09202, doi:10.1029/2006JD007712.
  • Guo, H., J. E. Penner, M. Herzog, S. Xie (2007): Investigation of the First and Second Aerosol Indirect Effects Using Data from the May 2003 Intensive Operational Period at the Southern Great Plains. J. Geophys. Res., 112, D15206, doi:10.1029/2006JD007173.
  • Weisenstein D. K., J. E. Penner, M. Herzog, X. Liu (2007): Global 2-D Intercomparison of Sectional and Modal Aerosol Modules. Atmos. Chem. Phys., Vol. 7, pp. 2339-2355.
  • Guo H., J. E. Penner, M. Herzog, H. Pawlowska (2007): Examination of the Aerosol Indirect Effect under Contrasting Environments during the ACE-2 Experiment. Atmos. Chem. Phys., Vol. 7, pp. 535-548.
  • Trentmann J., G. Luderer, T. Winterrath, M. O. Andreae, C. Textor, M. Herzog (2006): Modeling of Biomass Smoke Injection into the Lower Stratosphere by a Large Forest Fire (Part I): Reference Simulation. Atmospheric Chemistry and Physics, Vol. 6, pp. 5247-5260.
  • Luderer G., J. Trentmann, T. Winterrath, M. O. Andreae, C. Textor, M. Herzog (2006): Modeling of Biomass Smoke Injection into the Lower Stratosphere by a Large Forest Fire (Part II): Sensitivity Studies. Atmospheric Chemistry and Physics, Vol. 6, pp. 5261-5277.
  • Jablonowski C., M. Herzog, J. E. Penner, R. C. Oehmke, Q. Stout, B. van Leer, K. G. Powell (2006): Block-Structured Grids on the Sphere: Advection Experiments. Mon. Wea. Rev., Vol. 134(12), pp. 3691-3713.
  • Textor C., H. F. Graf, M. Herzog, J. M. Oberhuber, W. I. Rose, G. G. J. Ernst (2006): Volcanic Particle Aggregation in Explosive Eruption Columns. Part I: Parameterization of the Microphysics of Hydrometeors and Ash. J. Volcanl. Geotherm. Res., Vol. 150, pp. 359-377.
  • Textor C., H. F. Graf, M. Herzog, J. M. Oberhuber, W. I. Rose, G. G. J. Ernst (2006): Volcanic Particle Aggregation in Explosive Eruption Columns. Part II: Numerical Experiments. J. Volcanl. Geotherm. Res., Vol. 150, pp. 378-394.
  • Kinne, S. ,M. Schulz, C. Textor, S. Guibert, Y. Balkanski, S. E. Bauer, T. Berntsen, T. F. Berglen, O. Boucher, M. Chin, W. Collins, F. Dentener, T. Diehl, R. Easter, J. Feichter, D. Fillmore, S. Ghan, P. Ginoux, S. Gong, A. Grini, J. Hendricks, M. Herzog, L. Horowitz, I. Isaksen, T. Iversen, A. Kirkevaeg, S. Kloster, D. Koch, J. E. Kristjansson, M. Krol, A. Lauer, J. F. Lamarque, G. Lesins, X. Liu, U. Lohmann, V. Montanaro, G. Myhre, J. Penner, G. Pitari, S. Reddy, O. Seland, P. Stier, T. Takemura and X. Tie (2006): An AeroCom Initial Assessment Optical Properties in Aerosol Component Modules of Global Models. Atmos. Chem. Phys., Vol. 6, pp. 1815-1834.
  • Liu X., J. E. Penner, M. Herzog (2005): Global modeling of aerosol dynamics: Model description, evaluation, and interactions between sulfate and nonsulfate aerosols. J. Geophys. Res., Vol. 110, D18206, doi:10.1029/2004JD005674.
  • Gochis D., B. Anderson, A. Barros, A. Gettelman, J. H. Wang, J. Braun, W. Cantrell, Y. Q. Chen, N. Fox, B. Geerts, W. Q. Han, M. Herzog, P. Kucera, R. Kursinski, A. Laing, C. H. Liu, E. D. Maloney, S. Margulis, D. Schultz, S. Sherwood, A. Sobel, H. Vomel, Z. Wang (2005): The water cycle across scales. Bulletin of the American Meteorological Society, Vol. 86(12), pp. 1743-1746.
  • Jablonowski, C., M. Herzog, J.E. Penner, R.C. Oehmke, Q.F. Stout and B. van Leer (2004): Adaptive grids for weather and climate models. ECMWF Conference Proceedings, Seminar on Recent developments in numerical methods for atmospheric and ocean modelling, pp. 233-250.
  • Herzog M., D. K. Weisenstein, J. E. Penner (2004): A Dynamic Aerosol Module for Global Chemical Transport Models: Model Description. J. Geophys. Res., Vol. 109, D18202, doi:10.1029/2003JD004405.
  • Guo H., J. E. Penner, M. Herzog (2004): Comparison of the Vertical Velocity Used to Calculate the Cloud Droplet Number Concentration in a Cloud-Resolving and a Global Climate Model. In Fourteenth ARM Science Team Meeting Proceedings, Ed. by Denice Carrothers, pp. 1-6. Department of Energy, Albuquerque.
  • Herzog M., J. M. Oberhuber, Hans-F. Graf (2003): A Prognostic Turbulence Scheme for the Non-hydrostatic Plume Model ATHAM. J. Atmos. Sci. 60(22), pp. 2783-2796.
  • Textor C., H.-F. Graf, M. Herzog (2003): Injection of Gases into the Stratosphere by Explosive Volcanic Eruptions. J. Geophys. Res. 108(D19): 4606, doi:10.1029/2002JD002987.
  • Kinne S., U. Lohmann, S. Ghan, R. Easter, M. Chin, P. Ginoux, T. Takemura, I. Tegen, D. Koch, M. Herzog, J. E. Penner, G. Pitari, B. Holben, T. Eck, A. Smirnov, O. Dubovik, I. Slutsker, D. Tanre, O. Torres, M. Mishchenko, I. Geogdzhayev, A. Chu, Y. Kaufman (2003): Monthly Averages of Aerosol Properties: A Global Comparison among Models, Satellite Data and AERONET Ground Data. J. Geophys. Res. 108(D20): 4634, doi:10.1029/2001JD001253.
  • Penner, J. E., S.Y. Zhang, M. Chin, C. C. Chuang, J. Feichter, Y. Feng, P. Ginoux, M. Herzog, A. Higurashi, D. Koch, C. Land, U. Lohmann, M. Mishchenko, T. Nakajima, G. Pitari, B. Soden, I. Tegen, L. Stowe (2002): A Comparison of Model- and Satellite-Derived Optical Depth and Reflectivity. J. Atmos. Sci. 59 (3), pp. 441-460.
  • Herzog, M., C. Textor (2000): Numerical Simulations of Volcanic Eruption Plumes with ATHAM: A Task for Parallel Computing. HPC News, Issue 13, September 2000.
  • Herzog, M., J. E. Penner, J. J. Walton, S. M. Kreidenweis, D. Y. Harrington, D. K. Weisenstein (2000): Modeling of Global Sulfate Aerosol Number Concentrations. in B. N. Hale and M. Kulmala, eds, Nucleation and Atmopheric Aerosols 2000: 15th International Conference, AIP Conference Proceedings, Vol. 534, pp. 677-679.
  • Graf, H.-F., M. Herzog, J. M. Oberhuber (1999): The Effect of Environmental Conditions on Volcanic Plume Rise. J. Geophys. Res., Vol. 104, pp. 24,309-24,320.
  • Herzog M., H.-F. Graf, C. Textor, J. M. Oberhuber (1998): The effect of Phase Changes of Water on the Development of Volcanic Plumes. J. Volcanl. Geotherm. Res., Vol. 87, pp. 29-53.
  • Oberhuber, J. M., M. Herzog, H.-F. Graf, K. Schwanke (1998): Volcanic Plume Simulation on Large Scales. J. Volcanl. Geotherm. Res., Vol. 87, pp. 55-74.
  • Langmann, B., M. Herzog, H.-F. Graf (1998): Radiative Forcing of Sulfate Aerosols as Determined by a Regional Circulation-Chemistry Transport Model. Atmospheric Environment, Vol. 32, No. 16, pp. 2757-2768.


  • Geographical Tripos Part 1A, paper 2: Atmospheric Processes and Climate
  • Geographical Tripos Part 1B, paper 1: Climate Change
  • Natural Science Tripos Part III, minor option: Atmospheric Physics
  • MPhil in Environmental Science: Environmental Modelling and Practicals

External activities

  • American Geophysical Union, 2001-present