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The aim of the course is to provide a qualitative and quantitative understanding of the geochemistry of the earth surface environment. Geochemical processes are studied along the hydrological cycle, with an emphasis on abiotic and biotic reactions that modify the composition of the atmosphere, pedosphere and natural waters. Aspects of anthropogenic perturbation of global biogeochemical cycles are also addressed.
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- Water and energy cycles; chemical transport
- Atmosphere; greenhouse effect; atmospheric ozone
- Rainwater composition; atmospheric cycles of S and N; acid rain
- Chemical weathering; soil and ground waters
- Rivers; continental denudation; nutrients
- Lakes; mass balance models; acid lakes
- Oceans; processes affecting seawater composition
- Modeling elemental cycles with STELLA; global P and C cycles
Assessment:
Problem definition and solution, data interpretation (exam, assignments, computer practical including written report and oral presentation). Ability to (1) interpret chemical data and trends in terms of geochemical and geological processes, and (2) perform quantitative calculations (mass balance, equilibrium calculations) on natural systems using chemical data. Problem solving skills (40%), analytical skills (30%), general knowledge (30%).
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