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Session 2

Novel tracer techniques for investigating processes in the subsurface


Jaane Krüger, Uni Freiburg, Germany
Dr. Federica Tamburini, ETH, Switzerland

Invited speaker:
Jun. Prof. Dr. Michaela Dippold, Uni Goettingen, Germany

During the last several decades, stable and radioactive isotopes have become a widely used tool to study fate, cycling and abundance of pollutants and nutrients, as well as water, in the subsurface. Novel analytical techniques offer the opportunity to investigate these tracers at unprecedented temporal and spatial resolution and precision. New experimental approaches (e.g., isotope dilution, component specific labeling) afford opportunities to study important processes such as the turnover of soil organic matter, nutrient uptake by plants, and nutrient sorption and exchange (in particular phosphorus and nitrogen), and thus help to identify the variables controlling nutrient and water cycling in soils. This session includes field and laboratory studies of soil nutrient and soil-hydrologic processes, spanning agricultural to forested settings. We invite contributions using different approaches and different tracers (e.g., 18O, 13C, 15N, 32P, 33P isotopes).