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365 Days of Climate Awareness 324 – Running the Climate Model [1]

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Date: 2022-07-04

Climate models’ final output is generally a gridded (mapped) set of predicted temperatures around the globe: one complete map for each time step, from beginning (t 0 /t init ) to end (t n , or t final ). At the end of each time step, once the map has been completed, the updated temperatures across the entire map grid are loaded back into the equations along with the preset boundary conditions for the next time step, and the model is run again. This process continues, through each time step, until the finish time (January 1, 2100, or otherwise) is reached. And that concludes one run of the model.

There are dozens of models around the world, some focusing on the atmosphere, some on the oceans, some on the atmosphere, some including societal and economic components. Part of the role of the Intergovernmental Panel on Climate Change (IPCC) is to evaluate the different models and integrate their results into one comprehensive set of predictions for the periodic Climate Assessment. The present assessment is #6 (AR6) and is now available online in final draft.

Tomorrow: hindcasting.

Be brave, be steadfast and be well.

Sources:

Eustace Project - high-resolution modeling

Climate.gov - climate modeling primer

IPCC Sixth Assessment site

IPCC AR6 climate model comparisons

IPCC AR6 Annex 2: climate models

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[1] Url: https://www.dailykos.com/stories/2022/7/4/2108294/-365-Days-of-Climate-Awareness-324-Running-the-Climate-Model

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