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Sarah Ladd: Katalogdaten im Herbstsemester 2016

NameFrau Dr. Sarah Ladd
Adresse
EAWAG
Seestrasse 79
6047 Kastanienbaum
SWITZERLAND
Telefon041 58 765 21 11
E-Mailsarah.ladd@erdw.ethz.ch
DepartementUmweltsystemwissenschaften
BeziehungDozentin

NummerTitelECTSUmfangDozierende
701-1313-00LIsotopic and Organic Tracers in Biogeochemistry Information 3 KP2GR. Kipfer, S. Ladd
KurzbeschreibungThe course introduces the scientific concepts and typical applications of tracers in biogeochemistry. The course covers stable and radioactive isotopes, geochemical tracers and biomarkers and their application in biogeochemical processes as well as regional and global cycles. The course provides essential theoretical background for the lab course "Isotopic and Organic Tracers Laboratory".
LernzielThe course aims at understanding the fractionation of stable isotopes in biogeochemical processes. Students learn to know the origin and decay modes of relevant radiogenic isotopes. They discover the spectrum of possible geochemical tracers and biomarkers, their potential and limitations and get familiar with important applications
InhaltGeogenic and cosmogenic radionuclides (sources, decay chains);
stable isotopes in biogeochemistry (nataural abundance, fractionation);
geochemical tracers for processes such as erosion, productivity, redox fronts; biomarkers for specific microbial processes.
Skripthandouts will be provided for every chapter
LiteraturA list of relevant books and papers will be provided
Voraussetzungen / BesonderesStudents should have a basic knowledge of biogeochemical processes (BSc course on Biogeochemical processes in aquatic systems or equivalent)
701-1333-00LIsotopic and Organic Tracers Laboratory Belegung eingeschränkt - Details anzeigen 3 KP4PR. Kipfer, S. Ladd
KurzbeschreibungThis 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 but also flux rates will be calculated using different tracers.
LernzielStudents 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
InhaltBasics:
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