4DVar Tutorial Introduction: Difference between revisions
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All of the additional scripts necessary to run the 4D-Var tests are available from the ROMS Subversion (SVN) repository. The 4D-Var test cases are for the California Current System, 1/3 degree resolution, ('''WC13'''). | All of the additional scripts necessary to run the 4D-Var tests are available from the ROMS Subversion (SVN) repository. The 4D-Var test cases are for the California Current System, 1/3 degree resolution, ('''WC13'''). | ||
<div class="box"><nowiki>> svn checkout --username | <div class="box"><span class="red"><nowiki>> svn checkout --username joe_roms https://www.myroms.org/svn/src/test my_test</nowiki></span></div> | ||
==Download Lectures== | |||
Links to the upcoming [http://www.myroms.org/4DVar_workshop_2010 2010 ROMS 4D-Var workshop] lectures are provided below. We are planning to record the audio for these lectures to combine with the slides for future reference. These lectures are meant to supplement this 4D-Var tutorial. | |||
*'''Lecture 1:''' <span style="font-size: 75%">[http://www.myroms.org/tutorials/4DVar_1.pdf PDF]</span> <span class="twilightBlue">Primal 4D-Var</span> | |||
*'''Lecture 2:''' <span style="font-size: 75%">[http://www.myroms.org/tutorials/4DVar_2.pdf PDF]</span> <span class="twilightBlue">The Mechanics of 4D-Var</span> | |||
*'''Lecture 3:''' <span style="font-size: 75%">[http://www.myroms.org/tutorials/4DVar_3.pdf PDF]</span> <span class="twilightBlue">Dual 4D-Var</span> | |||
*'''Lecture 4:''' <span style="font-size: 75%">[http://www.myroms.org/tutorials/4DVar_4.pdf PDF]</span> <span class="twilightBlue">4D-Var Diagnostics</span> | |||
*'''Lecture 5:''' <span style="font-size: 75%">[http://www.myroms.org/tutorials/4DVar_5.pdf PDF]</span> <span class="twilightBlue">Observation Impact and Observation Sensitivity</span> | |||
==Directory Structure== | ==Directory Structure== | ||
Revision as of 17:34, 30 June 2010
4-Dimensional Variational (4D-Var) Data Assimilation Tutorial
This page is under construction
Download the code
All of the additional scripts necessary to run the 4D-Var tests are available from the ROMS Subversion (SVN) repository. The 4D-Var test cases are for the California Current System, 1/3 degree resolution, (WC13).
> svn checkout --username joe_roms https://www.myroms.org/svn/src/test my_test
Download Lectures
Links to the upcoming 2010 ROMS 4D-Var workshop lectures are provided below. We are planning to record the audio for these lectures to combine with the slides for future reference. These lectures are meant to supplement this 4D-Var tutorial.
- Lecture 1: PDF Primal 4D-Var
- Lecture 2: PDF The Mechanics of 4D-Var
- Lecture 3: PDF Dual 4D-Var
- Lecture 4: PDF 4D-Var Diagnostics
- Lecture 5: PDF Observation Impact and Observation Sensitivity
Directory Structure
When the checkout is complete, you will have the following directory structure under your my_test directory.
/WC13 Main California Current System 4D-Var applications
/ARRAY_MODES Stabilized representer matrix array modes and clipping
/Data Input data directory
/Functionals Analytical expression header file
/I4DVAR Primal form of incremental, strong constraint 4D-Var, I4D-Var
/I4DVAR_impact I4D-Var observation impact
/Normalization 4D-Var error covariance normalization coefficients
/plotting 4D-Var plotting scripts (Matlab and ROMS plotting package)
/PSAS Dual form of 4D-Var, Physical-space Statistical Analysis System, 4D-PSAS
/PSAS_impact 4D-PSAS observation impact
/PSAS_sensitivity 4D-PSAS observation sensitivity (adjoint of 4D-PSAS)
/R4DVAR Dual form of 4D-Var, indirect representer method, R4D-Var
/R4DVAR_impact R4D-Var observation impact
/R4DVAR_sensitivity R4D-Var observation sensitivity (adjoint of R4D-Var)
