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Solar and thermal radiation are critical aspects of planetary climate, withgradients in radiative energy fluxes driving heating and cooling. Climatemodels require that radiative transfer tools be versatile, computationallyefficient, and accurate. Here, we describe a technique that uses an accuratefull-physics radiative transfer model to generate a set of atmosphericradiative quantities which can be used to linearly adapt radiative fluxprofiles to changes in the atmospheric and surface state -- the Linearized FluxEvolution (LiFE) approach. These radiative quantities describe how each modellayer in a plane-parallel atmosphere reflects and transmits light, as well ashow the layer generates diffuse radiation by thermal emission and by scatteringlight from the direct solar beam. By computing derivatives of these layerradiative properties with respect to dynamic elements of the atmospheric state,we can then efficiently adapt the flux profiles computed by the full-physicsmodel to new atmospheric states. We validate the LiFE approach, and then applythis approach to Mars, Earth, and Venus, demonstrating the informationcontained in the layer radiative properties and their derivatives, as well ashow the LiFE approach can be used to determine the thermal structure ofradiative and radiative-convective equilibrium states in one-dimensionalatmospheric models.

Linearized Flux Evolution (LiFE): A Technique for Rapidly Adapting Fluxes from Full-Physics Radiative Transfer Models