Global Phosphorus Cycle
This activity was selected for the On the Cutting Edge Exemplary Teaching Collection
Resources in this top level collection a) must have scored Exemplary or Very Good in all five review categories, and must also rate as “Exemplary” in at least three of the five categories. The five categories included in the peer review process are
- Scientific Accuracy
- Alignment of Learning Goals, Activities, and Assessments
- Pedagogic Effectiveness
- Robustness (usability and dependability of all components)
- Completeness of the ActivitySheet web page
For more information about the peer review process itself, please see http://serc.carleton.edu/NAGTWorkshops/review.html.
This page first made public: Jul 15, 2005
- To get the students comfortable with using STELLA
- To demonstrate the behavior of a closed system with multidirectional flows
- To convey the important concept of steady state behavior
- To convey the importance of the 1/2 DT rule, which says that the time step (DT) should be halved until there is no longer a change in results from model run to model run.
- To get the students comfortable with adjusting the model to run different experiments and with interpreting the results of those experiments.
Context for Use
Teaching Notes and Tips
Documented_P_Cycle.stm ( 294kB Jun7 05)
phosphorus.f90 ( 5kB Jun7 05)
assignment_assessment_1.pdf (Acrobat (PDF) 5kB Jun7 05)
References and Resources
Chameides, W.L., and Perdue, E.M., 1997, Biogeochemical Cycles: A ComputerInteractive Study of Earth System Science and Global Change, New York: Oxford University Press, p. 97-107 (Chp. 5, The Global Phosphorous Cycle).
Jahnke, R.A., 1992, The Phosphorus Cycle, in Butcher, S.S., Charlson, R.J., Orians, G.H., and Wolfe, G.V. (eds.), Global Biogeochemical Cycles, New York: Academic Press, p. 301-315.
Lerman, A., Mackenzie, F.T., and Garrels, R.M., 1975, Modeling of Geochemical Cycles: Phosphorus as an Example, Geological Society of America Memoir 142, p. 205-218.
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Controlled Vocabulary Terms
Resource Type: Activities:Classroom Activity, Computer Applications
Special Interest: Quantitative, Computer-Based
Grade Level: College Upper (15-16)
Quantitative Skills: Models and Modeling
Ready for Use: Ready to Use
Topics: Earth surface, Climate, Atmosphere, Biosphere