MERCATOR-NEMO team - 2011 actions

Last edited Timestamp?

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members

Name	Institution	%	Position
Clément Bricaud	Mercator Océan, Toulouse	35%	Mercator NEMO officer
Yann Drillet	Mercator Océan, Toulouse	5%	Mercator Consortium expert
Guillaume Reffray	Mercator Océan, Toulouse	15%	Mercator developper
Jerome Chanut	Mercator Océan, Toulouse	15%	Mercator developper
Elisabeth Remy	Mercator Océan, Toulouse	5%	Mercator developper
Julien Paul	Mercator Océan, Toulouse	15%	Mercator developper
Mondher Chekki	Mercator Océan, Toulouse	5%	Mercator developper
Romain Bourdalle-Badie	Mercator Océan, Toulouse	5%	Mercator developper

total weeks :
40 wk (1 man/year)

Summary:

Action	nb weeks	Brief description	Status	Branch name	Trac ticket n°	Wiki page name	Reviewer(s)	Review status	Ready for merge
Mercator-1	6	Improvment of OBC's	will be ok for merge 2012	dev_r3327_MERCATOR1_BDY	937	https://forge.ipsl.jussieu.fr/nemo/wiki/ticket/937	D. Storkey	ok	ok
Mercator-2	0	PPM horizontal advection scheme	waiting for vertical part from NOCL; postponned
Mercator-3	2	resolving the 2 versions of time-stepping	part1 ok ; postponned
Mercator-4	0	implementation of OBC's schemes for PISCES	postponned
Mercator-5	1	Solar flux filtering at daily frequency to force biogeochemistry model	devlopment ok; postponned
Mercator-6	0	Degradation toolbox	canceled
Mercator-7	3	Data assimilation interface: model equivalent of a SST night	will be ok for merge 2012	dev_r3342_MERCATOR7_SST	944	https://forge.ipsl.jussieu.fr/nemo/wiki/ticket/944	D. Lea	ok	ok
Mercator-8	0	Data assimilation interface: model equivalent of a SLA	postponned
Mercator-9	2	Discussion on implementing a configuration manager	done
Mercator-10	1	User Support
Mercator-11	1	Code Reviewing
Mercator-12	5	Beta Testing
Mercator-13	3	Exchange with others centers

MERCATOR.1 — Improvement of OBCs: end of 2011 task

Motivation: participate to merge of OBC and BDY; work on atmospheric pressure and tide forcing in the new package
Status : --
main tasks : --
Principal Investigator : Jerome Chanut (jchanut@…)
Deadline : --
Priority: High
Science Reviewer : --
System Reviewer : --
Number of weeks : 4 (TBC)

MERCATOR.2 — PPM advection scheme

Motivation: Add another scheme for tracers advection: horizontal part. Vertical part will be made by NOCL.
Status : Running on NEMO_3.2.
main tasks :review.
Principal Investigator : Guillaume Reffray (greffray@…)
Deadline :
Priority: Low
Science Reviewer :
System Reviewer :
Number of weeks : 2

MERCATOR.3 — resolving the 2 versions of time-stepping

Motivation: Tracer conservation and time splitting. reference: Shchepetkin, A. F., and J. C. McWilliams?, 2005
Status :Running in NEATL36 at Mercator.
main tasks : Main idea:replace Leapfrog scheme by a Fb tamporal scheme, but keep actual method for updating ssh at 3D time-stepping.
workplan:
1.test some eventual problem of divergence of SSh in barotropic mode compared to SSH in 3d mode ( cf Hallberg and Adcroft, OM 2009: Reconciling estimates of the free surface height in Lagrangian vertical coordinate ocean models with mode-split time stepping).
2.implementation in NEMO_3.3 of this time-splitting.
3.test in high-resolution configuration at Mercator.
4.take a decision for reorganization of step for time-splitting.
Priority: High
Principal Investigator : Clement Bricaud & Jerome Chanut (jchanut@…)
Number of weeks : 4 (TBC)

MERCATOR.4 — implementation of OBC's schemes for PISCES

Motivation: Use new package ; implement new methods.
Status :
main tasks :
Principal Investigator : Guillaume Reffray (greffray@…)
Priority:
Science Reviewer : --
System Reviewer :
Number of weeks : 2 (TBC)

MERCATOR.5 — Solar flux filtering at daily frequency to force biogeochemistry model.

Motivation: For coupled model ( physic + bio ): physic needs 24 hours (+ diurnal cycle) or 3 hours solar fluxes, but bio need a 24 hours mean.
Status :
main tasks :
Principal Investigator : Clement BRICAUD(cbricaud@…)
Priority:
Science Reviewer : --
System Reviewer :
Number of weeks : 2 (TBC)

MERCATOR.6 — Degradation toolbox.

Motivation: Usefull for offline forcing of tracers. adaptation for patial steps.
Status :
main tasks :
Principal Investigator : Coralie Perruche(cperruche@…)
Priority:
Science Reviewer : --
System Reviewer :
Number of weeks : 2 (TBC)

MERCATOR.7 — Data assimilation interface: model equivalent of a SST night

Motivation:
Status :
main tasks :
Principal Investigator : Elisabeth Remy (eremy@…)
Priority:
Science Reviewer : --
System Reviewer :
Number of weeks : 2 (TBC)

MERCATOR.8 — Data assimilation interface: model equivalent of a SLA

Motivation:
Status :
main tasks :
Principal Investigator : Elisabeth Remy (eremy@…)
Priority:
Science Reviewer : --
System Reviewer :
Number of weeks : 2 (TBC)

MERCATOR.9 — Discussion on implementing a configuration manager

Motivation: Add a configuration manager
Status :
main tasks : discussions, working group, make specifications.
Principal Investigator :Julien Paul (jpaul@…)
Priority:
Science Reviewer : --
System Reviewer :
Number of weeks : 2 (TBC) Conclusion of the working group discussion:

We think that it will be easier to start our work from an already existing tools,rather than to restart from zero. We decided to based our future work on the SIREN tools developed by Mercator-Ocean.

Description of Mercator's configuration manager: SIREN : System and Interface for oceanic RElocatable Nesting

Siren is a software used to build and launch, quickly and easily, regional oceanic simulations. These simulations are initialized and forced at boundaries by Mer- cator Ocean system. So thanks to Siren, a user can easily add some physical processes as tide, change some parameters, apply runoff as a flux, or use better bathymetry, atmospheric forcing... and of course get a higher resolution:

. Siren extracts bathymetry from child les and merges it with parent bathymetry at boundaries.
. Siren builds open boundaries condition files from parent's conguration output files.
. Siren creates runooff files over the area, and digs bathymetry to create a canal for rivers described as a flux.
. Siren creates a new restart le for a domain splitting from a given restart file or an output file.
. Siren compiles and launches NEMO2.3 on Mercator Ocean cluster.
. Siren makes some post-processings on the new conguration.

MERCATOR.10 — User Support

Motivation:Provide support to users of NEMO.
Number of weeks : 2

MERCATOR.11 — Code Reviewing

Motivation:Reviewing code from NEMO partners
Number of weeks : 4

MERCATOR.12 — Beta Testing

Motivation:Beta testing of the next relaese
Number of weeks : 4

MERCATOR.13 — Exchange with others centers

Motivation:System Team meetings, Developers Team meetings,NEMO Users meetings, partcipate to the merge party.
Number of weeks : 4

aditionnal work:

adaptation of PISCES to the VVL : compare work done by Guillaume Reffray with work done by UK Met Office.