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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 (...)


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 (...)


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 (...)


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 (...)


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 (...)


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 (...)


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 (...)


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 (...)


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 (...)


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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