Global climate modeling:

GCM = general circulation model.

What are the objectives of the GCMs?


How do they work?

General characteristics of GCMs:

Three major grid type components: atmospheric, oceanic, land.

For an atmospheric element - what will be important properties describing its state?

For an oceanic element - what will be its important properties describing its state?

For a land element - what will be its important properties describing its state?

What will be the laws for how neighbors effect each other?

What is input?

What will be output of computer?

Challenges:

How can you test how good the computer model is (the discussion question)?

Some thoughts on chaotic systems and projections.

How accurate are the computer models?

How accurate are they in comparison to any competing methodology?



Discussion question for next time. What factors will maximize the climatic effect of a given eruption, and why are the demonstrable effects so short lived? Can they be ignored in long term climate predictions?

Readings: