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Many applications in Solar physics need a 1D atmospheric model as initialcondition or as reference for inversions of observational data. The VALatmospheric models are based on observations and are widely used since decades.Complementary to that, the FAL models implement radiative hydrodynamics andshowed the shortcomings of the VAL models since almost equally long time. Inthis work, we present a new 1D layered atmosphere that spans not only from thephotosphere to the transition region, but from the solar interior up to far inthe corona. We also discuss typical mistakes that are done when switching onsimulations based on such an initial condition and show how the initialcondition can be equilibrated so that a simulation can start smoothly. The 1Datmosphere we present here served well as initial condition for HD and MHDsimulations and should also be considered as reference data for solving inverseproblems.

Standard 1D solar atmosphere as initial condition for MHD simulations and switch-on effects