Dynamics II
The focus of the course is to identify the underlying dynamics for the atmosphere-ocean system. This is done through theory, numerical models, and statistical data analysis. It has been recognized that the atmospheric and oceanic flow binds together the interactions between the biosphere, hydrosphere, lithosphere and atmosphere that control the planetary environment. The fundamental concepts of atmosphere-ocean flow, energetics, vorticity, wave motion are described. This includes atmospheric wave motion, extratropical synoptic scale systems, the oceanic wind driven and thermohaline circulation. These phenomena are described using the dynamical equations, observational and proxy data, as well basic physical and mathematical concepts. Exercises complement the lessons.
Climate System II
This lecture will give an overview about the climate system and its changes during the past, focussing on the last few million years. We begin by describing the external astronomical forcing of the climate system and the observed response, as represented by proxy evidence for paleoclimatic variations. The main components and processes of the climate system, as well as available different dating and analyses methods for paleoclimate research will be explained. Key paleoclimate archives, e.g. ice cores, marine sediment cores and different terrestrial records, will be discussed. The general overview will be supplemented by a presentation of some of the latest research results and most important open questions within the related fields of paleoclimate research. We will show that the past climate dynamics broadens our view of the climate system in general, including the positive and negative feedbacks determining climate sensitivity. Such an approach is necessary to put our recent and expected future climate change into a long-term perspective.
Modelling of the Earth System
Content: 1) Types of models, linear vs. non-linear, box & complex models 2) Finite differences and spectral methods 3) Examples: waves, diffusion, boundaries 4) Finite Elements and spectral methods (atmosphere and ocean) 5) Model coupling (atmosphere and ocean) 6) Data assimilation (Kalman filters etc) 7) High-performance computing in modelling (scalability) 8) Numerical Schemes incl. Random Systems (Stochastic equations, Lattice Gases) 9) Cryosphere (Sea ice, ice sheets, and permafrost) 10) Earth system models including tracers and dynamical vegetation 11) Chemistry Transport Models 12) Inverse methods in chemistry
Climate Sciences Seminar Series
The seminar series is based on research topics in Climate Sciences. It shows new ideas, results, and questions and shall stimulate scientific discourses within all fields of climate research. Contributions of students and guests are very welcome as an addition to contributions from members of AWI and the university.
Towards a global sustainable development of our Earth
Global sustainable development is only possible on the basis of comprehensive and up-to-date environmental assessments. Decision-makers can thus be provided with scenarios generated from environmental data and modelling. Satellites allow systematic observations and measurements from space (e.g., the qualities of air and water). The information allows a detailed analysis of greenhouse gas concentrations, the extent and thickness of polar ice and glaciers, the state of vegetation and desertification. Earth system models can estimate the causes and consequences of rising greenhouse emissions on sea-level rise and ocean acidification. Data and models in tandem provide valuable information on the protection of our Earth system including its biodiversity. In this working group, we will discuss scientific results as well as the consequences for society.
Lohmann, G., 1996: Stability of the thermohaline circulation in analytical and numerical models, Ph. D. Dissertation, University of Bremen (Germany), 128 pp. Reports on Polar Research 200, Alfred Wegener Institute Bremerhaven. doi:10.2312/BzP_0200_1996 Abstract/Zusammenfassung
Fischer, H., Kumke, T., Lohmann, G., Flöser, G., Miller, H., Storch, H.v., Negendank, J.F.W., 2004: Introduction to the KIHZ project, pp. v-vii. In: The climate in historical times: Toward a synthesis of Holocene proxy data and climate models, Springer-Verlag, Berlin Heidelberg New York. Fischer, H.; Kumke, T.; Lohmann, G.; Flöser, G.; Miller, H.; Storch, H.v.; Negendank, J.F.W. (Eds.) DOI:10.1007/978-3-662-10313-5, ISBN 978-3-540-20601-9 link https://www.springer.com/gp/book/9783540206019
Lohmann, G., R. Treffeisen, A. Wagner, A. Kornmann, M. Weigelt, 2013a. Naturwissenschaftliche Perspektive der Klimawissenschaft 1, M12. Fernuniversität in Hagen. Umweltwissenschaften (infernum) der Fernuniversität Hagen link
Lohmann, G., R. Treffeisen, A. Wagner, A. Kornmann, M. Weigelt, 2013b. Naturwissenschaftliche Perspektive der Klimawissenschaft 2, M12. Fernuniversität in Hagen. Umweltwissenschaften (infernum) der Fernuniversität Hagen link
Lohmann, G., K. Grosfeld, D. Wolf-Gladrow, V. Unitan, J. Notholt, and A. Wegener (Eds.), 2013: "Earth System Science: Bridging the Gaps between Disciplines. Perspectives from a Multi-disciplinary Helmholtz Research School". Series: SpringerBriefs in Earth System Sciences, 2013, 138 p. 61 illus., 52 in color. ISBN: 978-3-642-32234-1 (Print) 978-3-642-32235-8 (Online) Springer, Heidelberg. doi: 10.1007/978-3-642-32235-8; link2
Lohmann, G., H. Meggers, V. Unnithan, D. Wolf-Gladrow, J. Notholt, A. Bracher (eds.), Towards an Interdisciplinary Approach in Earth System Science: Advances of a Helmholtz Research School. Springer Earth System Sciences, Heidelberg, Germany. 2015, X, 251 pages, 83 illus. in color. ISBN 978-3-319-13864-0. doi:10.1007/978-3-319-13865-7 (link)
Chirila, D., and G. Lohmann, 2015: Introduction to Modern Fortran for Earth System Sciences. 2015, XXII, 250 pages. 15 illus., 10 illus. in color. ISBN: 978-3-642-37008-3; Springer, Berlin Heidelberg. link
, link to source code, link to source
Lohmann, G., R. Treffeisen, K. Grosfeld, C. Danek, 2019a. Naturwissenschaftliche Perspektive der Klimawissenschaft 1, M12. Fernuniversität in Hagen. Umweltwissenschaften (infernum) der Fernuniversität Hagen
Lohmann, G., R. Treffeisen, K. Grosfeld, C. Danek, 2019b. Naturwissenschaftliche Perspektive der Klimawissenschaft 2, M12. Fernuniversität in Hagen. Umweltwissenschaften (infernum) der Fernuniversität Hagen
