Articles | Volume 17, issue 9
https://doi.org/10.5194/gmd-17-4053-2024
https://doi.org/10.5194/gmd-17-4053-2024
Development and technical paper
 | 
17 May 2024
Development and technical paper |  | 17 May 2024

Open boundary conditions for atmospheric large-eddy simulations and their implementation in DALES4.4

Franciscus Liqui Lung, Christian Jakob, A. Pier Siebesma, and Fredrik Jansson

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Cited articles

Carpenter, K. M.: Note on the paper “Radiation conditions for the lateral boundaries of limited-area numerical models”, Q. J. Roy. Meteor. Soc., 108, 717–719, https://doi.org/10.1002/qj.49710845714, 1982. a
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Denis, B., Laprise, R., Caya, D., and Côté, J.: Downscaling ability of one-way nested regional climate models: The Big-Brother Experiment, Clim. Dynam., 18, 627–646, https://doi.org/10.1007/s00382-001-0201-0, 2002. a, b, c
Giometto, M., Christen, A., Meneveau, C., Fang, J., Krafczyk, M., and Parlange, M.: Spatial Characteristics of Roughness Sublayer Mean Flow and Turbulence Over a Realistic Urban Surface, Bound.-Lay. Meteorol., 160, 425–452, https://doi.org/10.1007/s10546-016-0157-6, 2016. a
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Short summary
Traditionally, high-resolution atmospheric models employ periodic boundary conditions, which limit simulations to domains without horizontal variations. In this research open boundary conditions are developed to replace the periodic boundary conditions. The implementation is tested in a controlled setup, and the results show minimal disturbances. Using these boundary conditions, high-resolution models can be forced by a coarser model to study atmospheric phenomena in realistic background states.
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