2019/05/13 by David Ciro, Ciro, David, Breno Raphaldini +3
Earth and Planetary Sciences · Environmental Science · Physics and Astronomy · #Atmospheric and Oceanic Physics (physics.ao-ph) #Climate variability and models #FOS: Physical sciences #Meteorological Phenomena and Simulations #Oceanographic and Atmospheric Processes #physics.ao-ph
paper · pdf · doi:10.48550/arxiv.1905.05071
9 pages, 5 figures
arxiv created 2019/05/13 · openalex publication_date 2019/05/13 · arxiv updated 2019/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Atmospheric blockings are persistent large-scale climate patterns with duration between days and weeks. In principle, blockings might involve a large number of modes interacting non-linearly, and a conclusive description for their onset and duration is still elusive. In this paper we introduce a simplified account for this phenomena by means of a single-triad of Rossby-Hawritz waves perturbed by one topography mode. It is shown that the dynamical features of persistent atmospheric patterns have zero measure in the phase space of an unperturbed triad, but such measure becomes finite for the perturbed dynamics. By this account we suggest that static inhomogeneities in the two-dimensional atmospheric layer are required for locking flow patterns in real space.