Suchergebnis: Katalogdaten im Frühjahrssemester 2021

Nummer	Titel	Typ	ECTS	Umfang	Dozierende
Physik Master
Wahlfächer
Physikalische und mathematische Wahlfächer
Auswahl: Umweltphysik
701-1216-00L	Numerical Modelling of Weather and Climate	W	4 KP	3G	C. Schär, J. Vergara Temprado, M. Wild
Kurzbeschreibung	The course provides an introduction to weather and climate models. It discusses how these models are built addressing both the dynamical core and the physical parameterizations, and it provides an overview of how these models are used in numerical weather prediction and climate research. As a tutorial, students conduct a term project and build a simple atmospheric model using the language PYTHON.
Lernziel	At the end of this course, students understand how weather and climate models are formulated from the governing physical principles, and how they are used for climate and weather prediction purposes.
Inhalt	The course provides an introduction into the following themes: numerical methods (finite differences and spectral methods); adiabatic formulation of atmospheric models (vertical coordinates, hydrostatic approximation); parameterization of physical processes (e.g. clouds, convection, boundary layer, radiation); atmospheric data assimilation and weather prediction; predictability (chaos-theory, ensemble methods); climate models (coupled atmospheric, oceanic and biogeochemical models); climate prediction. Hands-on experience with simple models will be acquired in the tutorials.
Skript	Slides and lecture notes will be made available at Link
Literatur	List of literature will be provided.
Voraussetzungen / Besonderes	Prerequisites: to follow this course, you need some basic background in atmospheric science, numerical methods (e.g., "Numerische Methoden in der Umweltphysik", 701-0461-00L) as well as experience in programming. Previous experience with PYTHON is useful but not required.
151-0110-00L	Compressible Flows	W	4 KP	2V + 1U	T. Rösgen
Kurzbeschreibung	Themen: Instationäre eindimensionale Unterschall- und Überschallströmungen, Akustik, Schallausbreitung, Überschallströmung mit Stössen und Prandtl-Meyer Expansionen, Umströmung von schlanken Körpern, Stossrohre, Reaktionsfronten (Deflagration und Detonation). Mathematische Werkzeuge: Charakteristikenverfahren, ausgewählte numerische Methoden.
Lernziel	Illustration der Physik der kompressiblen Strömungen und Üben der mathematischen Methoden anhand einfacher Beispiele.
Inhalt	Die Kompressibilität im Zusammenspiel mit der Trägheit führen zu Wellen in einem Fluid. So spielt die Kompressibilität bei instationären Vorgängen (Schwingungen in Gasleitungen, Auspuffrohren usw.) eine wichtige Rolle. Auch bei stationären Unterschallströmungen mit hoher Machzahl oder bei Überschallströmungen muss die Kompressibilität berücksichtigt werden (Flugtechnik, Turbomaschinen usw.). In dem ersten Teil der Vorlesung wird die Wellenausbreitung bei eindimensionalen Unterschall- und Überschallströmungen behandelt. Es werden sowohl Wellen kleiner Amplitude in akustischer Näherung, als auch Wellen grosser Amplitude mit Stossbildung behandelt. Der zweite Teil befasst sich mit ebenen stationären Überschallströmungen. Schlanke Körper in einer Parallelströmung werden als schwache Störungen der Strömung angesehen und können mit den Methoden der Akustik behandelt werden. Zu der Beschreibung der zweidimensionalen Überschallumströmung beliebiger Körper gehören schräge Verdichtungsstösse, Prandtl -Meyer Expansionen usw.. Unterschiedliche Randbedingungen (Wände usw.) und Wechselwirkungen, Reflexionen werden berücksichtigt.
Skript	nicht verfügbar
Literatur	Eine Literaturliste mit Buchempfehlungen wird am Anfang der Vorlesung ausgegeben.
Voraussetzungen / Besonderes	Voraussetzungen: Fluiddynamik I und II
701-1244-00L	Aerosols II: Applications in Environment and Technology	W	4 KP	2V + 1U	M. Gysel Beer, D. Bell, J. Slowik
Kurzbeschreibung	The life-cycle of atmospheric aerosols, the evolution of their physical and chemical properties, and their impacts on climate, atmospheric chemistry and health are studied in detail using examples from current research.
Lernziel	The students achieve a profound knowledge of atmospheric aerosols and their climate and health impacts including the underlying physical and chemical processes. The students know and understand advanced experimental methods and are able to design experiments to study aforementioned impacts and processes.
Inhalt	Atmospheric aerosols: important sources and sinks, wet and dry deposition, chemical composition and transformation processes, importance for men and environment, interaction with the gas phase, influence on health and climate.
Skript	Information is distributed during the lectures
Literatur	Seinfeld, J.H. and Pandis, S.N., Atmospheric Chemistry and Physics: From Air Pollution to Climate Change. 3rd ed., John Wiley & Sons, Hoboken, 2016.
Voraussetzungen / Besonderes	This course build up on the lecture "Aerosols I: Physical and Chemical Principles"
701-1264-00L	Atmospheric Physics Lab Work Number of participants limited to 18. Target grous are: MSc Atmospheric and Climate Science, MSc Interdisciplinary Sciences, MSc Physics, MSc Environmental Sciences.	W	2.5 KP	5P	Z. A. Kanji
Kurzbeschreibung	Versuche aus den Bereichen Atmosphärenphysik, Meteorologie und Aerosolphysik, die im Labor und teilweise im Freien durchgeführt werden.
Lernziel	Das Praktikum bietet Einblicke in verschiedene Aspekte der Atmosphärenphysik, die anhand von Experimenten erarbeitet werden. Es werden dabei Kenntnisse über Luftbewegungen, die (windabhängige) Verdampfung und Abkühlung, sowie die Analyse von Feinstaubpartikeln und deren Einfluss auf die an der Erde gemessene Sonneneinstrahlung erlangt.
Inhalt	Details zum Praktikum sind auf der Webseite zum Praktikum (siehe link) zu erfahren.
Skript	Versuchsanleitungen auf der Webseite
Voraussetzungen / Besonderes	Three out of four available experiments must be carried out. The experiments are conducted in groups of 2 (or 3). There will be three introduction lectures of 2 hours each in the beginning of the semester to familiarise students with the topics covered and report writing process. The introduction lectures will take place on Mondays March 1, March 15 and March 29 from 10-12 hours in CHN L17.1
651-1504-00L	Snowcover: Physics and Modelling	W	4 KP	3G	M. Schneebeli, H. Löwe
Kurzbeschreibung	Snow is a fascinating high-temperature material and relevant for applications in glaciology, hydrology, atmospheric sciences, polar climatology, remote sensing and natural hazards. This course introduces key concepts and underlying physical principles of snow, ranging from individual crystals to polar ice sheets.
Lernziel	The course aims at a cross-disciplinary overview about the phenomenology of relevant processes in the snow cover, traditional and advanced experimental methods for snow measurements and theoretical foundations with key equations required for snow modeling. Tutorials and short presentations will also consider the bigger picture of snow physics with respect to climatology, hydrology and earth science.
Inhalt	The lectures will treat snow formation, crystal growth, snow microstructure, metamorphism, ice physics, snow mechanics, heat and mass transport in the snowcover, surface energy balance, snow models, wind transport, snow chemistry, electromagnetic properties, experimental techniques. The tutorials include a demonstration/exercise part and a presentation part. The demonstration/exercise part consolidates key subjects of the lecture by means of small data sets, mathematical toy models, order of magnitude estimates, image analysis and visualization, small simulation examples, etc. The presentation part comprises short presentations (about 15 min) based on selected papers in the subject. First practical experience with modern methods measuring snow properties can be acquired in a field excursion.
Skript	Lecture notes and selected publications.
Voraussetzungen / Besonderes	We strongly recommend the field excursion to Davos on Saturday, March 14, 2020, in Davos. We will demonstrate traditional and modern field-techniques (snow profile, Near-infrared photography, SnowMicroPen) and you will have the chance to use the instruments yourself. The excursion includes a visit of the SLF cold laboratories with the micro-tomography setup and the snowmaker.
701-1232-00L	Radiation and Climate Change	W	3 KP	2G	M. Wild
Kurzbeschreibung	This lecture focuses on the prominent role of radiation in the energy balance of the Earth and in the context of past and future climate change.
Lernziel	The aim of this course is to develop a thorough understanding of the fundamental role of radiation in the context of Earth's energy balance and climate change.
Inhalt	The course will cover the following topics: Basic radiation laws; sun-earth relations; the sun as driver of climate change (faint sun paradox, Milankovic ice age theory, solar cycles); radiative forcings in the atmosphere: aerosol, water vapour, clouds; radiation balance of the Earth (satellite and surface observations, modeling approaches); anthropogenic perturbation of the Earth radiation balance: greenhouse gases and enhanced greenhouse effect, air pollution and global dimming; radiation-induced feedbacks in the climate system (water vapour feedback, snow albedo feedback); climate model scenarios under various radiative forcings.
Skript	Slides will be made available
Literatur	As announced in the course
701-1270-00L	High Performance Computing for Weather and Climate	W	3 KP	3G	O. Fuhrer
Kurzbeschreibung	State-of-the-art weather and climate simulations rely on large and complex software running on supercomputers. This course focuses on programming methods and tools for understanding, developing and optimizing the computational aspects of weather and climate models. Emphasis will be placed on the foundations of parallel computing, practical exercises and emerging trends such as using GPUs.
Lernziel	After attending this course, students will be able to: - Understand a broad variety of high performance computing concepts relevant for weather and climate simulations - Work with weather and climate simulation codes that run on large supercomputers
Inhalt	HPC Overview: - Why does weather and climate require HPC? - Today's HPC: Beowulf-style clusters, massively parallel architectures, hybrid computing, accelerators - Scaling / Parallel efficiency - Algorithmic motifs in weather and climate Writing HPC code: - Data locality and single node efficiency - Shared memory parallelism with OpenMP - Distributed memory parallelism with MPI - GPU computing - High-level programming and domain-specific languages
Literatur	- Introduction to High Performance Computing for Scientists and Engineers, G. Hager and G. Wellein, CRC Press, 2011 - Computer Organization and Design, D.H. Patterson and J.L. Hennessy - Parallel Computing, A. Grama, A. Gupta, G. Karypis, V. Kumar (https://www-users.cs.umn.edu/~karypis/parbook/) - Parallel Programming in MPI and OpenMP, V. Eijkhout (http://pages.tacc.utexas.edu/~eijkhout/pcse/html/index.html)
Voraussetzungen / Besonderes	- fundamentals of numerical analysis and atmospheric modeling - basic experience in a programming language (C/C++, Fortran, Python, …) - experience using command line interfaces in *nix environments (e.g., Unix, Linux)

Seite 1 von 1