Wave Triad with Forcings as a Nambu System

Autor:	Blender, Richard, Fregin, Joscha
Rok vydání:	2020
Předmět:	Physics - Atmospheric and Oceanic Physics
Druh dokumentu:	Working Paper
Popis:	The dynamics of an ideal wave triad with real amplitudes has a well-known Nambu representation with energy and enstrophy as conservation laws. Here we derive Nambu representations for systems with constant forcings. These equations have been applied to triads of Rossby-Haurwitz waves in the atmosphere where they are forced with orography. The conservation laws are based on relations for the unforced amplitudes and a Hamiltonian given by the total energy plus terms involving the unforced amplitudes. The forcing of the unstable wavenumber causes a recharge cycle. Comment: 9 pages, 1 figure
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2004.08148 Zobrazit plný text záznamu View this record from Arxiv