Abstract
A metamodel is a model of a model. Metamodels are sometimes called emulators because they emulate complex computer codes, and can be seen as simplified codes that behave (almost) like the original codes. When a complex model cannot be conveniently used in some circumstances, a metamodel may be run as a substitute for the original model. Metamodels are currently used in various research areas, for example, in hydrology (Razavi et al., 2012) or in ecology (Conti and O’Hagan, 2010). Recently, metamodels were used to emulate an ensemble of crop models and study the effect of climate change on crop yield (Makowski et al., 2015).
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