Noise rectification in quasigeostrophic forced turbulence

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/39089

Title:	Noise rectification in quasigeostrophic forced turbulence
Authors:	Alvarez,A;Hernandez-Garcia,E;Tintore,J
Contributors:	物理研究所
Keywords:	TOPOGRAPHIC STRESS;DRIFT WAVES;TRANSPORT;PLASMA;MODELS;MOTION
Date:	1998
Issue Date:	2010-07-08 14:04:33 (UTC+8)
Publisher:	中央大學
Abstract:	We study the appearance of large-scale mean motion sustained by stochastic forcing on a rotating fluid (in the quasigeostrophic approximation) flowing over topography, We show that the effect is a kind of noise-rectification phenomenon, occurring here in a spatially extended system, and requiring nonlinearity, absence of detailed balance, and symmetry breaking to occur. By application of an analytical coarse-graining procedure, we identify the physical mechanism producing such an effect: It is a forcing coming from the small scales that manifests itself in a change in the effective viscosity operator and in the effective noise statistical properties. Numerical simulations confirm our findings. [S1063-651X(98)14211-3].
Relation:	PHYSICAL REVIEW E
Appears in Collections:	[Graduate Institute of Physics] journal & Dissertation

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