A Regional Climate Model (RCM) is a climate model of higher spatial resolution than an Earth System Model. In short, a RCM uses data from an ESM simulation which covers the entire globe (with a relative lower resolution), to provide a more spatially detailed simulation (we say of “higher resolution”) on a particular region. That’s why CMIP5 product images only show the Organization providing the ESM while CORDEX ones shows an Organization for both the ESM and the RCM. If an organization has more than one model, it is distinguished by a letter in parenthesis.

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