Discussion
Match each type of climate model with what it does.
List I
A. Energy balance model
B. Radiative convective model
C. General circulation model
D. Earth system model
List II
1. three dimensional equations on a global grid
2. one or few equations for the planetary balance
3. a GCM with carbon and other cycles included
4. a single vertical column in detail
Answer: B
Correct answer: A-2, B-4, C-1, D-3
The four form a hierarchy of increasing complexity and decreasing tractability. An energy balance model reduces the planet to one or a few equations. A radiative convective model resolves a single vertical column in detail. A general circulation model solves the three-dimensional fluid equations on a global grid. And an Earth system model adds the carbon and other biogeochemical cycles to a GCM. The simpler members are not obsolete - they are what make a result understandable.
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