Publications

Paper
Talks


Book

·        Hutter, K., Jöhnk, K.D., 2004. Continuum methods of physical modelling – Continuum mechanics, dimensional analysis, turbulence. Springer-Verlag, Berlin Heidelberg, pp. 635.

 

Publications

in press

·        Jöhnk, K.D., 2004. Heat Balance of Open Water Bodies. In: Lehr, J.H. (ed.) The Encyclopedia of Water, John Wiley & Sons Publ.

·        Verspagen, J.M.H., Passarge, J., Jöhnk, K.D., Visser, P.M., Peperzak, L., Boerse, P.,  Laanbroek, H.J. and Huisman, J., 2005. Water management strategies against toxic Microcystis blooms in the Dutch delta. Ecological Applications.

 

Reviewed publications

·        Verspagen, J.M.H., Snelder, E.O.F.M., Visser, P.M., Jöhnk, K.D., Ibelings, B.W., Mur, L.R., Huisman, J., 2005. Benthic - pelagic coupling in the population dynamics of the cyanobacterium Microcystis. Freshwater Biology 50: 854-867.

·        Ostendorp, W., Schmieder, K., Jöhnk, K.D., 2004. Assessment of human pressures and hydromorphological impacts on lakeshores in Europe. Ecohydrology and Hydrobiology 4: 379-395.

·        Schmieder, K., Dienst, M., Ostendorp, W., Jöhnk, K.D., 2004. Effects of water level variations on the dynamics of the reed belts of Lake Constance. Ecohydrology and Hydrobiology 4: 469-480.

·        Jöhnk, K.D., Straile, D., Ostendorp, W., 2004. Extreme Floods at Lake Constance - Climate impact on lake shore biocoenosis in the light of the 1999 centennial flood. Limnologica 34: 15-21.

·        Straile, D., Jöhnk, K.D., Rossknecht, H., 2003. Complex effects of winter-warming on the physico-chemical characteristics of a deep lake, Limnology & Oceanography 48: 1432-1438.

·        Jöhnk, K.D., Umlauf, L., 2001. Modelling the metalimnetic oxygen minimum in a medium sized alpine lake, Ecological Modelling 136: 67-80.

·        Franke, U., Jöhnk, K.D., Hutter, K., 1999. A physical-biological coupled model for algal dynamics in lakes. Bulletin of Mathematical Biology 61: 239-272.

·        Gries, T., Jöhnk, K.D., Fields, D., Strickler, J.R., 1999. Size and structure of "footprints" produced by Daphnia: impact of animal size and density gradients. Journal of Plankton Research 21: 509-523.

·        Wu, T., Jöhnk, K.D., Svendsen, B., Hutter, K., 1996. On the gravity-driven shear flow of an ice-till mixture. Annals of Glaciology 23: 124-128.

·        Svendsen, B., Wu, T., Jöhnk, K.D., 1996. On the role of mechanical interactions in the steady-state gravity flow of a two-constituent mixture down an inclined plane. Proceedings of the Royal Society of London A 452: 1189-1205.

·        Jöhnk, K.D., Svendsen, B., 1996. A thermodynamic formulation of the equations of motion and buoyancy frequency for Earth's fluid outer core. Continuum Mechanics and Thermodynamics 8: 75-101.

·        Hutter, K., Jöhnk, K.D., Svendsen, B., 1994. On interfacial transition conditions in two phase gravity flow. Zeitschrift für Angewandte Mathematik und Physik 45: 746-762.

·        Jöhnk, K.D., Hutter, K., Svendsen, B., 1993. Steady state gravity flow of a binary mixture down an inclined plane. Recent Advances in Mechanics of Structured Continua, AMD-Vol. 160/MD-Vol. 41: 55-63.

 

Thesis

·        Jöhnk, K.D., 2000. 1D Hydrodynamical Models in Limnophysics – Turbulence, Meromixis, Dissolved Oxygen. Habilitation thesis, TU Darmstadt, 235 p. (in german)

·        Jöhnk, K.D., 1992. Analytical and numerical calculations of the free oscillations of the Earth’s outer core. Dissertation, TH Darmstadt, 196 p. (in german)

 

Conference proceedings

·        Schmieder K., Dienst, M., Jöhnk, K. & Ostendorp, W., 2004. Auswirkungen des Extremhochwassers auf die Uferröhrichte des Bodensees - Synthese. German Society of Limnology (DGL), Conference proceedings Köln, p. 536-541.

·        Jöhnk, K.D., 2002. Simulation of temperature variations in european lakes. Conference proceedings, German Society of Limnology (DGL), Kiel, 17.9.- 21.9.01, p. 269-273. (in german)

·        Jöhnk, K.D., 2000. Time series analysis of Lake Constance water levels 1817 – 1999. Conference proceedings, German Society of Limnology (DGL), Rostock, 27.9.-1.10.99, p. 989-993. (in german)

·        Jöhnk, K.D., 1999. Reconstruction and forecast of dissolved oxygen in Ammersee. Conference proceedings, German Society of Limnology (DGL), Klagenfurt, Österreich, 28.9.- 2.10.98, p. 214-218. (in german)

·        Jöhnk, K.D., 1999. Meromixis from a physicists viewpoint. Conference proceedings, German Society of Limnology (DGL), Klagenfurt, Austria, 28.9.- 2.10.98, p. 82-96. (in german)

 

National publications

·        Ostendorp, W., Jöhnk, K.D., 2003. Jahrhunderthochwasser 1999 – Jahrhundertniedrigwasser 2003: Seespiegeltrends und Extremereignisse am Bodensee. Natur & Mensch 6: 6-12.

·        Jöhnk, K.D., 2001. Numerical simulations of temperature and oxygen in Ammersee. In: Bayerisches Landesamt für Wasserwirtschaft (Ed.), Umstellung des seeinternen Stoffhaushalts bayerischer Voralpenseen im Zuge der Reoligotrophierung und Auswirkungen auf das Nahrungsnetz, Informationsberichte 2: 43-71. (in german)

·        Jöhnk, K.D., 2000. Simulation of temperature structure and dissolved oxygen in Ammersee. In: Bayerisches Landesamt für Wasserwirtschaft (Ed.), Seen – Gewässerschutz, Nutzungen und Zielkonflikte. Oldenbourg Verlag, München, p. 161-200. (in german)

 

Reports, Lecture notes

·        Jöhnk, K.D., Hofmann, H., Hemm, M., Lessmann, D., Nixdorf, B., 2004. Morphometry, hydrology and limnophysical modeling of mining pit lakes. In: Hüttl, R.F. & Gerwin, W. (eds.), Entwicklung und Bewertung gestörter Kulturlandschaften, Forschungszentrum Bergbaulandschaften, ISBN 3-937728-01-5, 331-358. (in german: Untersuchungen zur Morphometrie und Hydrologie sowie limnophysikalische Modellierung von Tagebauseen)

·        Hemm, M., Jöhnk, K.D., 2004. Database of lakes in Germany: Description and applications. Gewässerreport 8, BTUC-AR 3/2004, ISSN 1434-6834, 145-159. (in german: Datenbank stehender Gewässer in Deutschland – Beschreibung und Anwendungen)

·        Huisman, J., Jöhnk, K.D., 2004. Simulation of the population development of the toxic cyanobacterium Microcystis in Lake Nieuwe Meer under proposed heated water inflow scenarios – Phase 4: Simulations for confined heat input. Report for NUON, 12 p.

·        Huisman, J., Jöhnk, K., Sommeijer, B., Sharples, J., Visser, P.M., Stroom, J., 2004. Intermittent Mixing in Lake Nieuwe Meer: Field Experiment and Model Simulations 2003. Report for Water board (Hoogheemraadschap) Rijnland, 71 p.

·        Huisman, J., Jöhnk, K.D., 2004. Simulation of the population development of the toxic cyanobacterium Microcystis in Lake Nieuwe Meer under proposed heated water inflow scenarios – Phase 3: Calibration of the model. Report for IVL Svenska Miljöinstitutet AB and NUON, 17 p.

·        Huisman, J., Jöhnk, K.D., Sommeijer, B., 2004. Simulation of the population development of the toxic cyanobacterium Microcystis in Lake Nieuwe Meer under proposed heated water inflow scenarios – Phase 2: a fully developed model of vertical turbulent diffusivity and various climate scenarios. Report for NUON, 29 p.

·        Huisman, J., Jöhnk, K.D., Sommeijer, B., 2003. Simulation of the population development of the toxic cyanobacterium Microcystis in Lake Nieuwe Meer under proposed heated water inflow scenarios. Report for IVL Svenska Miljöinstitutet AB and NUON, 37 p.

·        Jöhnk, K.D , 2003. Mechanistic growth model for the simulation of reed under (extreme) varying lake levels. Report for Research Project "Auswirkungen des Extremhochwassers 1999 auf die Uferröhrichte des Bodensees", Institut für Landschafts- und Pflanzenökologie, Universität Hohenheim, Germany, 65 p. (in german)

·        Jöhnk, K.D., 2001. Numerical modelling of the temperature structure of Wannsee. Report, Umweltbundesamt, Berlin, 34 p. (in german)

·        Jöhnk, K.D., Hutter, K., 1998. Simulation of temperature and dissolved oxygen in Ammersee. Bavarian regional authorities for water management. Report, Wielenbach, 156 p. (in german)

·        Jöhnk, K.D. (Ed.), 1997. Fluid- and continuum mechanics. Report 1987-1997, TU Darmstadt, 89 p. (in german)

·        Jöhnk, K.D., 1993. Dynamics of the Earth's Interior – physical properties. Lecture notes, Eigenverlag, 125 p. (in german)

·        Jöhnk, K.D., 1990. Numerical mathematics II (Interpolation, approximation, fourier transformation). Lecture notes, Eigenverlag, 190 p. (in german)

·        Jöhnk, K.D., 1989. Numerical mathematics I (Roots, linear systems). Lecture notes, Eigenverlag, 153 p. (in german)

·        Bäuerle, E., Jöhnk, K.D., 1987. Analytical and numerical simulations of the free oscillations of Lake Lugano using one-dimensional models. iesgo Report, A-4, 42 p. (in german)

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Talks

·        Meteorological and hydrodynamical forcing of plankton dynamics
ASLO Summer Meeting, Santiago de Compostela, Spain
19. – 24. June 2005
Jöhnk, Huisman

·        Auswirkungen extremer Klimavariationen auf die Ufervegetation des Bodensees
4. Internationale Kommunale Klimaschutzkongress
16. June 2005, Friedrichshafen, Germany
Ostendorp, Jöhnk

·        Climate Change & Harmful Cyanobacteria
Shallow Lakes Conference 2005, Dalfsen, The Netherlands
5. – 9. June 2005
Huisman, Jöhnk, Sharples, Sommeijer, Visser, Stroom

·        Water management strategies against harmful cyanobacteria in the Dutch delta
Shallow Lakes Conference 2005, Dalfsen, The Netherlands
5. – 9. June 2005
Verspagen, Passarge, Jöhnk, Visser, Peperzak, Boers, Laanbroek, Huisman

·        Auswirkungen des Extremhochwassers auf die Uferröhrichte des Bodensees – Synthese
Conference of the German Society of Limnology, Köln, Germany
9/2004
Schmieder K., Dienst, M., Jöhnk, K. & Ostendorp, W.

·        Extremwasserstände und Klimawandel am Bodensee
Konstanz, Germany
24.11.2004

·        Lake stratification under climatic change
Conference on “Climate Change & Aquatic Systems”, University of Plymouth, United Kingdom
21. – 23. July 2004

·        Hydrology of lakes – pelagic water exchange, water level variation in the lakeshore zone, waves and currents (Forum 5)
LAWA/DIN Workshop on “Hydromorphology of Lakes”, University of Konstanz, Germany
24. – 26. June 2004
Chairman Forum 5  

·        Changes in water column stratification and plankton competition induced by climate shifts
IBED Day, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, The Netherlands
17.03.2004

·        Modeling stratification and phytoplankton competition in Lake Nieuwe Meer
NIOO, Centre for Estuarine and Marine Ecology, Yerseke, The Netherlands
11.02.2004

·        Nonlinear dynamics of eco-hydrological time series of lakes
Hydrofractals'03, Monte Verità, Ascona, Switzerland
24. – 29. September 2003

·        Mining lakes as groundwater dominated hydrological systems: Assessment of the water balance of Lake Plessa 117 by using isotope tracers and seapagemeter measurements
 IUGG 2003, Sapporo, Japan
30. June – 11. July 2003
Hofmann, Knöller, Lessmann, Jöhnk, Grünewald, Nixdorf

·        Mechanistic growth model for the simulation of reed under (extreme) varying lake levels
Lake Shores Conference, Konstanz, Germany
19. – 21. June 2003

·        Auswirkungen des Extremhochwassers von 1999 auf die Uferröhrichte des Bodensees – Modellierung
Lake Shores Conference, Konstanz, Germany
19. – 21. June 2003

·        Water Level Variations at Lake Constance and Climate Change
 Lake Shores Conference, Konstanz, Germany
19. – 21. June 2003

·        Coupling of simulated physical cardinal - characteristics with observed phytoplankton biovolume/chla phenology
Climate and Lake Impacts in Europe, Regionalisation SIG meeting, Konstanz, Germany
25. – 28. May 2003
Jöhnk, Straile

·        Lake Constance - Time series analysis
Institute for  Biodiversity and Ecosystem Dynamics, University of Amsterdam, The Netherlands
8.11.2002

·        Geographic variability of lake stratification in Europe
Institute for Biodiversity and Ecosystem Dynamics, Univ. Amsterdam, The Netherlands
8.11.2002

·        Meromixis of mining lakes - The influence of anthropogenic and meteorological disturbances on lake stratification
Int. Conf. on Disturbed Landscapes - Analysis, Modeling and Valuation, Brandenburg University of Technology Cottbus, Germany
24. – 27. September 2002
Jöhnk, Lessmann

·        Meromixis of mining lakes - biocoenotical effects of the anthropogenic disturbances
Int. Conf. on Disturbed Landscapes - Analysis, Modeling and Valuation, Brandenburg University of Technology Cottbus, Germany
24. – 27. September 2002
Lessmann, Jöhnk, Fyson, Jander

·        Characterization of mining lakes in Germany by geomorphological parameters
Int. Conf. on Disturbed Landscapes - Analysis, Modeling and Valuation, Brandenburg University of Technology Cottbus, Germany
24. – 27. September 2002
Hemm, Jöhnk, Lessmann

·        Hydrodynamical models in Limnology – problems and examples
German Meteorological Service, Observatory Lindenberg, germany
20.08.2002

·        Temperature variability of European lakes under changed climatic conditions and its impact on plankton development
ASLO Summer Meeting, Victoria, Canada
10. – 14. June 2002

·        Lake-simulations using k-e-turbulence models
Dresdner Grundwasserforschungszentrum, Dresden
30.11.2001

·        Simulation of temperature variations in European lakes
Conference of the German Society of Limnology, Kiel
17. – 21. September 2001

·        Simulation of the stratification of temperature and dissolved oxygen in lakes using a one-dimensional k-e-turbulence model
Special Collaborative Programme SFB 565 (Disturbed landscapes), BTU Cottbus, Germany
25.04.2001

·        Water level fluctuations of Lake Constance and climate variations
2nd Workshop on Effects of the extremal flood of 1999 on reed belts of Lake Constance, Institute of Lake Research, Langenargen, Germany
22.3.2001

·        Mixing processes in meromictic and potentially meromictic lakes – Effects of extremal events and climate variations
Faculty of Biology, University of Konstanz
5.2.2001.

·        Temperature variations in European lakes – Simulations using mean monthly meteorological data
EU-REFLECT final meeting, Lammi, Finland
6. – 9. December 2000

·        Water level fluctuations of Lake Constance
Special Collaborative Programme SFB 454 (Littoral of Lake Constance), Limnological Institute, University of Konstanz, Germany
4.12.2000.

·        Water level fluctuations in Lake Constance and Great Salt Lake (USA) as an indicator for climatic variations – nonlinear time-series analysis and dynamical systems
Institute of Mechanics, Technical University of Darmstadt, Germany
3.11.2000

·        Meromixis and mixing processes in lakes
Centre for Environmental Research (UFZ), Magdeburg, Germany
27.6.2000.

·        Modelling temperature and dissolved oxygen using biological-physical coupled models
EAWAG, Kastanienbaum, Switzerland
14.11.1999

·        Modelling the oxygen stratification of Lake Ammer
4th Workshop on Physical Processes in Natural Waters, Roosta, Estland
13 – 17 September 1999
Umlauf, Jöhnk

·        Time series analysis of Lake Constance water levels 1817 – 1999
Conference of the German Society of Limnology, Rostock, Germany
27. September – 1. October 1999

·        Simulation of the seasonal course of dissolved oxygen in Ammersee
Conference of the German Society of Limnology, Klagenfurt, Austria
28. September – 2. October 1998

·        Meromixis from a physicists viewpoint
Conference of the German Society of Limnology, Klagenfurt, Austria
28. September – 2. October 1998
Plenary lecture

·        Simulation of temperature stratification and dissolved oxygen in Ammmersee
Conference on Lakes – Water conservation, exploitation and conflicts, Herrsching, Germany
6. – 8. July 1998

·        One dimensional dissolved oxygen-turbulence model
ASLO/AGU Ocean Sciences Meeting, San Diego, CA, USA
9. – 13. February 1998

·        Dissolved oxygen in Ammersee
Limnological Institute, University of Konstanz, Germany
14.1.1998

·        “Footprints” of Daphnia
Conference of the German Society of Limnology, Frankfurt, Germany
22. – 27. September 1997
Gries, Jöhnk

·        Modelling dissolved oxygen in Ammersee
Special Collaborative Programme SFB 248-A1, Institute of Environmental Physics, Heidelberg, Germany
3.12.1996

·        Bacteria-Algal-Model
Special Collaborative Programme SFB 248-A1, Institute of Environmental Physics, Heidelberg, Germany
30.1.1996

·        Anisotropic turbulence
Special Collaborative Programme SFB 248-A1, Institute of Environmental Physics, Heidelberg, Germany
10.10.1995

·        Dynamical behavior of a Plankton-Nutrient model
Conference of the German Society of Limnology, Hamburg, Germany
26. – 30. September 1994

·        Free oscillations of the Earth’s core – modeling using high precision computer arithmetic
IMACS/GAMM Workshop Scientific Computing, Karlsruhe, Germany
15.9.1994

·        Cellular automata
Special Collaborative Programme SFB 248, Limnological Institute, Konstanz, Germany
15.2.1993

·        Analytical and numerical solutions of the free oscillations of the Earth’s fluid outer core
Conference of the German Geophysical Society, Kiel, Germany
22. – 27. March 1993

·        Free oscillations of the Earth’s outer core
German Geophysical Society, Seminar on Physics of the Earth’s deep interior, Neustadt/Wstr., Germany
2. – 6. October 1989

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