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Incorporating Local and Global Data into Courses...Incorporating Local and Global Data into Courses...
Transcript of Incorporating Local and Global Data into Courses...Incorporating Local and Global Data into Courses...
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Incorporating Local and Global Data into Courses
Rachel O’Brien, Allegheny CollegeEllen E. Martin, University of Florida
Preparing for an Academic Career in Geosciences Workshop: Summer 2009
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• Online datasets– Teach particular concepts and/or skills– Recreate research, test hypotheses
• Hands-on data – Field work and/or lab work in your course– A genuine research experiment
• Published literature– Journal articles, government documents,
NGO reports
Types of data available
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• Data and assignments can be tailored to reach a broad range of student groups
• Primary and secondary education (K-12)• Introductory undergraduate courses• Upper-level undergraduate courses • Graduate courses
Datasets are flexible
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• Majority of online sources are now free
• Simple, low-cost field and lab work
Datasets are cost-effective
Datasets are concept-effective• Allow for compare/contrast work at a
range of spatial & temporal scales• Single or multi-concept patterns
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NOAA’s Live Access to Climate Data• map views and cross sections• range of variables for a range of depths• Compilation of multiple data setsNOAA’s Oceanographic In-Situ Data Access• CDT (conductivity, temperature, depth) data• Depth profiles or Time series
Example: Online DataOcean Circulation
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Ocean CirculationSurface temperature
Temperature 3000 m
Surface salinity
http://ferret.wrc.noaa.gov/nvods
Map view
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Ocean Circulation
Classic textbook
Pacifichigh latitude
Atlanticlow latitude
http://www.epic.noaa.gov/epic/ewb/
Profiles
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TempSalinity
Oxygen Phosphate
http://ferret.wrc.noaa.gov/nvods
Cross Sections
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Ocean Circulation Questions1. Pick out areas of anomalous temperature
(reconstruct circulation patterns)2. Where do deep waters form today? (T and S
acquired at the surface)3. What controls density? (relative contributions of T
and S under varying conditions) 4. Identify a salinity anomaly, come up with a theory
for what might cause the anomaly and how you might test it (observation, testable hypothesis)
5. What is the relationship between oxygen and phosphate in the ocean? (nutrient cycling)
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Example: Hybrid, project-based course
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First-year seminar: Water and the Earth
H20 & N budgets: increasing spatial scale; increasing complexity
Hands-on and online data sources used
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What is a watershed?Local watershed (10-1 km2)
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What is a watershed?
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.RESERVOIR VOLUME OF WATER, m3 PECENTAGE OF TOTAL
Saturated groundwater 820,000 94%
Biomass 43,000 5%
Snow pack 7,800 <1%
Stream channel 22 2.5x10-5%
Total volume 870822
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What happens to water and N budgets when a forest is
clear cut??NE watershed (10 km2)
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What happens to water and N budgets when a forest is
clear cut??
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1965 1966 1967 1968 1969 1970 1971
Years
NO
3, K
g/m
o
4.0
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5.0
5.2
pH
Nitrate StreampH in Stream
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What is causing the “Dead Zone” in the Gulf of Mexico?Mississippi River watershed
(106 km2)
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What is causing the “Dead Zone” in the MRB?