English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46720
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Spatio-temporal evolution of perturbations in ensembles initialized by bred, Lyapunov and singular vectors

AuthorsPazó, Diego ; Rodríguez, Miguel A. ; López, Juan M.
Issue Date2010
PublisherInternational Meteorological Institute in Stockholm
Blackwell Publishing
CitationTellus A 62(1): 10-23 (2010)
AbstractWe study the evolution of finite perturbations in a meteorological toy model with extended chaos, namely the Lorenz ‘96 model. The initial perturbations are chosen to be aligned along different dynamic vectors: bred, Lyapunov, and singular vectors. Using a particular vector determines not only the amplification rate of the perturbation but also the spatial structure of the perturbation and its stability under the evolution of the flow. The evolution of perturbations is systematically studied by means of the so-called mean-variance of logarithms diagram that provides in a very compact way the basic information to analyze the spatial structure. We discuss the corresponding advantages of using those different vectors for preparing initial perturbations to be used in ensemble prediction systems, focusing on key properties: dynamic adaptation to the flow, robustness, equivalence between members of the ensemble, etc. Among all the vectors considered here, the so-called characteristic Lyapunov vectors are possibly optimal, in the sense that they are both perfectly adapted to the flow and extremely robust.
Description14 páginas, 10 figuras, 2 tablas.-- This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License.
Publisher version (URL)http://dx.doi.org/10.1111/j.1600-0870.2009.00419.x
URIhttp://hdl.handle.net/10261/46720
DOI10.1111/j.1600-0870.2009.00419.x
ISSN0280-6495
E-ISSN1600-0870
Appears in Collections:(IFCA) Artículos
Files in This Item:
File Description SizeFormat 
Spatio-temporal evolution.pdf275,68 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.