November 1 - A case study: Methane in the atmosphere, lecture material (pdf)

Reading assigments

• Reread the section "Redox Reaction in Natural Environments", pp. 231-242 of the textbook
  
• Allen et al., 2003, Methane Emissions of Rice Increased by Elevated Carbon Dioxide and Temperature, Journal Environmental Quality 32, 1978f.
  

November 3 - The Global Water Cycle, lecture material (pdf)

Reading assignment: Chapter 10 of the textbook

Info on the Global Energy and Water Cycle Experiment: GEWEX, GEWEX II


Homework on these two lectures (to be handed in on Thursday, 10^th November)

1. Explain why not all methane produced in methanogenesis in wetlands escapes to the atmosphere.  2 pts
2. Explain how increased primary productivity in a wetlands can enhance its methane emissions.  2 pts
3. Mitigation options for lowering wetland methane emissions include i) periodic drainage, and ii) Fe³⁺ amendment. Why/how are these measures effective in reducing methane emissions?  2 pts
4. List as many links as you can think of between the global water cycle and the biogeochemical processes you learned about .  4+ pts