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Systems of equations (presentation, 2002) (Numerical analysis)

June 2002

Presentation of Petra Smolikova during the ALATNET training course on Numerical Analysis in Kranjska Gora, 29-31 May 2002. Contents : The basic set of equations (fully compressible nonhydrostatic system) Basic atmospheric waves (sound waves ; internal gavity waves) Anelastic approximation (...)

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Numerical analysis (presentation, 2002) (Numerical analysis)

June 2002

Presentations of Joze Rakovec and Thomas Vrhovec during the ALATNET training course on Numerical Analysis in Kranjska Gora, 29-31 May 2002. Contents (Joze Rakovec): Introduction Historical aspects Numerical schemes Non-linearity Contents (Thomas Vrhovec): Grid point presentation of (...)

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Use of satellite data (presentation, 2001) (Analysis and assimilation)

June 2002

Presentation of Elisabeth Gérard during the ALATNET training course on Data Assimilation in Gourdon, 11-22 June 2001. Contents : 1. Influence of satellite data in NWP TEMP, SATOB, SSM/I, ATOVS ARPEGE grid Illustration of the OSEs Short range in Northern Hemisphere Medium range Principle of (...)

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Adjoint technique (presentation, 2001) (Analysis and assimilation)

June 2002

Presentation of Dominique Giard during the ALATNET training course on Data Assimilation in Gourdon, 11-22 June 2001. Contents : ADJOINT TECHNIQUE : GENERAL DESCRIPTION Definitions of tangent linear (TL) and adjoint (AD) operators Case of 3D-Var and 4D-Var assimilation Practical rules for (...)

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A short overview of ODB (presentation, 2002) (ODB : Observational DataBase)

June 2002

ODB (Observational DataBase) is a database system to store and handle all kind of observations. It allows fast data extraction by data query language ODB/SQL. Kertész Sándor presented an overview of ODB in June 2002 : basics structurs views database definition How ODB looks like? Where to find (...)

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Variational Data Assimilation (presentation, 2001) (Variational)

June 2001

Presentation of Claude Fischer, Andras Horanyi and Wafaa Sadiki during the ALATNET training course on Data Assimilation in Gourdon, 11-22 June 2001. Contents : General aspects : motivations history general formulation of the cost function error covariance matrices minimization algorithms (...)

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Observations : use, screening, cost function, control and monitoring (presentation, 2001) (Observations)

June 2001

Presentation of Patrick Moll and Elisabeth Gérard during the ALATNET training course on Data Assimilation in Gourdon, 11-22 June 2001. Observation : General presentation General problematic of data assimilation Problems with the available data Real time available data Production suite The (...)

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Optimal estimation in meteorology (presentation, 2001) (Analysis and assimilation)

June 2001

OPTIMAL ESTIMATION IN METEOROLOGY was presented by Gérald Desroziers during the ALATNET seminar on Data Assimilation, June 11-22, 2001. Introduction estimation theory observations are not perfect, the estimate will also be approximate, the estimate must be an optimal combination of (...)

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CANARI-DIAGPACK (presentation, 2001) (Analysis and assimilation)

June 2001

Presentation of Andras Horanyi and Jure Jerman during the ALATNET training course on Data Assimilation in Gourdon, 11-22 June 2001. Contents : Diagpack, idea behind Brief history of Canari + Diagpack Objective analysis/data assimilation Applications of CANARI NOWCASTING OI: basic theory (...)

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Digital Filtering and data assimilation (presentation, 2000) (Analysis and assimilation)

June 2001

DIGITAL FILTERING AND DATA ASSIMILATION, presentation of Dominique Giard during the ALATNET seminar on Data Assimilation, June 11-22, 2001. A. INTRODUCTION A.1. Sources of noise in assimilation A.2. Filtering or initialization methods A review of the various filtering schemes Incremental (...)

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