Modeling Early Earth Climate with GEEBITT

In this activity, students gain experience using a spreadsheet and working with others to decide how to conduct their model 'experiments' with the NASA GEEBITT (Global Equilibrium Energy Balance Interactive Tinker Toy). While becoming more familiar with the physical processes that made Earth's early climate so different from that of today, they also acquire first-hand experience with a limitation in modeling, specifically, parameterization of critical processes.

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Cindy Shellito
On the Cutting Edge Collection - Science Education Resource Center (SERC) at Carleton College
Activity takes one 50-minute class period. Computer access and special software is required.

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Teaching Tips

Teaching Tips

There are some useful comments on the instructor notes included with this lesson -

CO2 levels are listed at 370 ppm in the activity write-up that can be downloaded. This needs to be updated since current levels are over 390.

GEEBITT is a modeling tool from NASA configured for HS and post-secondary students to input data on solar luminosity, albedo, and an atmospheric greenhouse gas loading parameter in order to analyze the global mean surface temperature in different climate regimes (Modern, Archean, Neoproterozoic). The NASA GEEBITT tool can be found at: