Suchergebnis: Katalogdaten im Frühjahrssemester 2018

Umweltnaturwissenschaften Master Information
Vertiefung in Atmosphäre und Klima
Labor- und Feldkurse
NummerTitelTypECTSUmfangDozierende
701-1260-00LClimatological and Hydrological Field Work Information Belegung eingeschränkt - Details anzeigen
Number of participants limited to 30.

The waiting list will be deleted on February 27th, 2018.
W2.5 KP5PL. Gudmundsson, D. Michel, S. I. Seneviratne
KurzbeschreibungPractical work using selected measurement techniques in meteorology and hydrology. The course consists of field work with different measuring systems to determine turbulence, radiation, soil moisture, evapotranspiration, discharge and the atmospheric state as well as of data analysis.
LernzielLearning of elementary concepts and practical experience with meteorological and hydrological measuring systems as well as data analysis.
InhaltPractical work using selected measurement techniques in meteorology and hydrology. The course consists of field work with different measuring systems to determine turbulence, radiation, soil moisture, evapotranspiration, discharge and the atmospheric state as well as of data analysis.
Voraussetzungen / BesonderesThe course takes place in the hydrological research catchment Rietholzbach (field work) and at ETH (data analysis) as a block course.
701-1262-00LAtmospheric Chemistry Lab WorkW2.5 KP5PC. Marcolli, U. Krieger, T. Peter
KurzbeschreibungEs werden Versuche zum Gefrieren von Wassertröpfchen und zur Entstehung von Eiswolken durchgeführt. Dazu werden Wasser-in-Öl Emulsionen hergestellt und in einem DSC (differential scanning calorimeter) abgekühlt. Die gemessenen Gefriertemperaturen werden in den Kontext der Wolkenbildung in der Atmosphäre gestellt.
LernzielDieses Modul bietet die Möglichkeit, anhand von atmosphärenchemisch relevanten Experimenten Einblick in das praktische Arbeiten im Labor zu gewinnen.
InhaltCirrus clouds play an important role in the radiative budget of the Earth. Due to scattering and absorption of the solar as well as terrestrial radiation the cirrus cloud cover may influence significantly the Earth climate. How the cirrus clouds exactly form, is still unknown. Ice particles in cirrus clouds may form by homogeneous ice nucleation from liquid aerosols or via heterogeneous ice nucleation on solid ice nuclei (IN). The dihydrate of oxalic acid (OAD) acts as a heterogeneous ice nucleus, with an increase in freezing temperature between 2 and 5K depending on solution composition. In several field campaigns, oxalic acid enriched particles have been detected in the upper troposphere with single particle aerosol mass spectrometry. Simulations with a microphysical box model indicate that the presence of OAD may reduce the ice particle number density in cirrus clouds by up to ~50% when compared to exclusively homogeneous cirrus formation without OAD.
The goal of this atmospheric chemistry lab work is to expand the knowledge about the influence of oxalic acid in different aqueous solution systems for the heterogeneous ice nucleation process. Experiments of emulsified aqueous solutions containing oxalic acid will be performed with a differential scanning calorimeter (DSC, TA Instruments Q10). Water-in-oil emulsions contain a high number of micrometer-sized water droplets. Each droplet freezes independently which allows the measurement of homogeneous freezing for droplets without heterogeneous IN and heterogeneous freezing in the presence of an IN. OAD is formed in-situ in a first freezing cycle and will act as an IN in a second freezing cycle. This experiment will be performed in the presence of different solutes. In general, the presence of a solute leads to a decrease of the freezing temperature. However, also more specific interactions with oxalic acid are possible so that e.g. the formation of OAD is inhibited.
In the atmospheric chemistry lab work experiments, emulsified aqueous oxalic acid solutions are prepared and investigated in the DSC during several freezing cycles. The onset of freezing is evaluated. Freezing onsets in the presence and absence of OAD are compared. This is done for pure oxalic acid solutions and oxalic acid solutions containing a second solute (e.g. another dicarboxylic acid). The quality of the emulsions is checked in an optical microscope.
SkriptUnterlagen zum Versuch werden während des Praktikums abgegeben
LiteraturOxalic acid as a heterogeneous ice nucleus in the upper troposphere and its indirect aerosol effect,
B. Zobrist C. Marcolli, T. Koop, B. P. Luo, D. M. Murphy, U. Lohmann, A. A. Zardini, U. K. Krieger, T. Corti, D. J. Cziczo, S. Fueglistaler, P. K. Hudson, D. S. Thomson, and T. Peter
Atmos. Chem. Phys., 6, 3115–3129, 2006.
Voraussetzungen / BesonderesDieses Modul kann von maximal 8 Studierenden besucht werden. Der praktische Teil wird in zweier, max. dreier Gruppen durchgeführt.
701-1264-00LAtmospheric Physics Lab Work Information Belegung eingeschränkt - Details anzeigen
Number of participants limited to 18.

Target grous are: MSc Atmospheric and Climate Science, MSc Interdisciplinary Sciences, MSc Physics, MSc Environmental Sciences.

The waiting list willbe deleted on March 2nd, 2018.
W2.5 KP5PZ. A. Kanji
KurzbeschreibungVersuche aus den Bereichen Atmosphärenphysik, Meteorologie und Aerosolphysik, die im Labor und teilweise im Freien durchgeführt werden.
LernzielDas 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.
InhaltDetails zum Praktikum sind auf der Webseite zum Praktikum (siehe link) zu erfahren.
SkriptVersuchsanleitungen auf der Webseite
Voraussetzungen / BesonderesAus einer Liste von 5 Versuchen müssen 4 Versuche durchgeführt werden. Die Versuche werden in Zweiergruppen bearbeitet.
Zu Beginn findet eine Einführungsveranstaltung statt.
701-1266-00LWeather Discussion Belegung eingeschränkt - Details anzeigen
Limited number of participants.
Preference will be given to students on the masters level in Atmospheric and Climate Science and Environmental Sciences and doctoral students in Environmental Sciences.

Prerequisites: Basic knowledge in meteorology is required for this class, students are advised to take courses 702-0473-00L and/or 701-1221-00L before attending this course.
W2.5 KP2PH. Wernli
KurzbeschreibungThis three-parts course includes: (i) concise units to update the students knowledge about key aspects of mid-latitude weather systems and numerical weather prediction, (ii) a concrete application of this knowledge to predict and discuss the "weather of the week", and (iii) an in-depth case study analysis, performed in small groups, of a remarkable past weather event.
LernzielStudents will learn how to elaborate a weather prediction and to cope with uncertainties of weather (probabilistic) prediction models. They will also learn how to apply theoretical concepts from other lecture courses on atmospheric dynamics to perform a detailed case study of a specific weather event, using state-of-the-art observational and model-derived products and datasets.
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