2020/07/11 by B. Fleck, M. Carlsson, E. Khomenko +3 · 18 citations
Physics and Astronomy · #Atmosphere (unit) #Dispersion (optics) #Dispersion relation #Ground wave propagation #Ionosphere and magnetosphere dynamics #Lightning and Electromagnetic Phenomena #Phase (matter) #Radiation #Solar and Space Plasma Dynamics #Wave propagation #astro-ph.SR
paper · pdf · doi:10.1098/rsta.2020.0170
published in Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences 379(2190), 20200170 (Royal Society) · 19 pages, 15 figures
arxiv created 2020/07/11 · openalex created_date 2020/07/16 · openalex publication_date 2020/12/21 · arxiv updated 2021/01/20 · openalex updated_date 2026/08/05
There has been tremendous progress in the degree of realism of three-dimensional radiation magneto-hydrodynamic simulations of the solar atmosphere in the past decades. Four of the most frequently used numerical codes are Bifrost, CO5BOLD, MANCHA3D and MURaM. Here we test and compare the wave propagation characteristics in model runs from these four codes by measuring the dispersion relation of acoustic-gravity waves at various heights. We find considerable differences between the various models. The height dependence of wave power, in particular of high-frequency waves, varies by up to two orders of magnitude between the models, and the phase difference spectra of several models show unexpected features, including ±180° phase jumps. This article is part of the Theo Murphy meeting issue 'High-resolution wave dynamics in the lower solar atmosphere'.