701-1333-00L Isotopes and Biomarkers in Biogeochemistry Laboratory
Semester | Autumn Semester 2022 |
Lecturers | C. Schubert, R. Kipfer |
Periodicity | yearly recurring course |
Language of instruction | English |
Comment | Number of participants limited to 14. Waiting list will be deleted 19.09.2022. No enrollment possible after 20.09.2022. |
Abstract | This course will illustrate how different tracers and isotopes are used in natural systems. Here especially the processes (transformation, timescales) that take place and can be revealed by tracers/isotopes will be demonstrated. |
Objective | Students know how to use tracers/isotopes to investigate/understand ecosystems They will understand the methods and analytical devices related to tracer/isotope work Have a feeling for timescales on which natural processes occur Students will be able to apply different sampling techniques in aquatic sciences |
Content | Basics: O,H isotopes as tracers for mixing in aquatic systems Carbon isotopes as tracer for methane oxidation 210Pb, 137Cs as a tracer for sedimentation rate/mixing SF6, Neon, He as tracers for exchange processes at the air/water interface Case assessment: Sampling of a Swiss lake (Rotsee) Sampling techniques for different elements Sample preparation for different techniques Measurements at isotope mass spectrometer/gamma counter Interpretation of results from the special sampling campaign and in a broader context |
Prerequisites / Notice | Sampling will take place in Rotsee (Lucerne). We will have 3 laboratory days at Eawag Kastanienbaum, 1 laboratory day at Eawag Duebendorf, and 2 days of preparation of a presentation and the presentation itself at ETH (Center). The presentation will be evaluated and is necessary to pass the class. |