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General yet compact equations are presented to express the thermodynamicimpact of physical parameterizations in a NWP or climate model. By expressingthe equations in a flux-conservative formulation, the conservation of massand energy by the physics parameterizations is a built-in feature of thesystem. Moreover, the centralization of all thermodynamic calculationsguarantees a consistent thermodynamical treatment of the different processes.The generality of this physics–dynamics interface is illustrated by applyingit in the AROME NWP model. The physics–dynamics interface of this modelcurrently makes some approximations, which typically consist of neglectingsome terms in the total energy budget, such as the transport of heat byfalling precipitation, or the effect of diffusive moisture transport.Although these terms are usually quite small, omitting them from the energybudget breaks the constraint of energy conservation. The presented set ofequations provides the opportunity to get rid of these approximations, inorder to arrive at a consistent and energy-conservative model. A verificationin an operational setting shows that the impact on monthly-averaged,domain-wide meteorological scores is quite neutral. However, under specificcircumstances, the supposedly small terms may turn out not to be entirelynegligible. A detailed study of a case with heavy precipitation shows thatthe heat transport by precipitation contributes to the formation of a regionof relatively cold air near the surface, the so-called cold pool. Given theimportance of this cold pool mechanism in the life cycle of convectiveevents, it is advisable not to neglect phenomena that may enhance it

Generalization and application of the flux-conservative thermodynamic equations in the AROME model of the ALADIN system