The PI is responsible to closely follow the progress of the action, and especially to contact NEMO project manager if the delay on preview (or review) are longer than the 2 weeks expected.


The action has to be detailed briefly in the 'Summary' section for later inclusion in other pages.
Edit the 'Summary' section as with an ordinary wiki page.

  • Italic formatting shows the default values or help.
  • Set specific Trac Links (development ticket and branch).

Out of this, the rest of the page can be edited on-line inside the form fields considering the following color code given hereafter.

Role / Color code

PI(S) Previewer(s) Reviewer(s)

Record your modifications for the section you have edited by clicking on the corresponding button at the end of the section with 'Save …' button. Just above, the log record will be updated.

The informations inside the form fields and this wiki page itself are stored in 2 separate databases.
As a consequence, there is absolutely no risk to make any modification in the page itself as long as you don't rename the page or modify the source code of {{{#!TracForm ... }}} processors.


Action ENHANCE-14_Jerome_SAL
PI(S) Jerome Chanut


Tidal modelling: implementation of Self Attraction and Loading (SAL)

Self Attraction and Loading effects represent the modification by tides of the earth gravity field through mass redistribution. Accounting for this is particularly important to obtain accurate representation of tides at the global scale.
This can be achieved in numerical models by adding an additional term to the existing astronomical potential. The exact computation of this term (which depends on the model tidal solution) is particularly expensive on a numerical point of view and is not part of this implementation.
We will provide here the proper interface in the tidal module and user interface as well to read the SAL potential from external models (TPXO for instance).
The possibility to use a simple "linear" approximation from the sea level anomaly, a commonly used alternative, will also be implemented.

Dependencies Depends on …
Target Expected end 2017: development/running OK; expected to by done for Merge Party next decemberPriority or deadline
Trac Ticket #1926
SVN branch [source:/branches//2017/dev_r8329_ENHANCE14_SAL dev_r8329_ENHANCE14_SAL
Previewer(s) Names
Reviewer(s) Names
Status progress

'.' => '/nemo/wiki/2017WP/ENHANCE-14_Jerome_SAL'


This section should be completed before starting to develop the code, in order to find agreement on the method beforehand.


add Ocean self‐attraction and loading in NEMO see Arric 2010


  • load potential is read in tide_init_load subroutine in sbctide routine
  • used in tide_init_potential
  • activivation in nam_sbctide namelist_ref block with ln_tide_load and potential filename

Reference manual and web pages updates

Tex Files/Chapters?/Chap_SBC.tex Tex Files/Bibliography/Biblio?.bib

Once the PI has completed this section, he should send a mail to the previewer(s) asking them to preview the work within two weeks.


Since the preview step must be completed before the PI starts the coding, the previewer(s) answers are expected to be completed within the two weeks after the PI has sent his request.
For each question, an iterative process should take place between PI and previewer(s) in order to reach a "YES" answer for each of the following questions.

Questions Answer Comment
Does the previewer agree with the proposed methodology?
Does the previewer agree with the proposed flowchart and list of routines to be changed?
Does the previewer agree with the proposed new list of variables, including agreement with coding rules?
Does the previewer agree with the proposed summary of updates in reference manual?
… … …

Updated on 08/04/2020 22:06:32 by anonymous

Once all "YES" have been reached, the PI can start the development into his development branch.


Once the development is done, the PI should complete this section below and ask the reviewers to start their review in the lower section.

Questions Answer Comment
Can this change be shown to produce expected impact? (if option activated)?
Can this change be shown to have a null impact? (if option not activated)
Detailed results of restartability and reproducibility when the option is activated. Please indicate the configuration used for this test
Detailed results of SETTE tests (restartability and reproducibility for each of the reference configuration)
Results of the required bit comparability tests been run: Are there no differences when activating the development?
If some differences appear, is reason for the change valid/understood?
If some differences appear, is the !ticket describing in detail the impact this change will have on model configurations?
Is this change expected to preserve all diagnostics?
If no, is reason for the change valid/understood?
Are there significant changes in run time/memory?
… … …

Updated on 07/24/2017 14:47:10 by cbricaud


A successful review is needed to schedule the merge of this development into the future NEMO release during next Merge Party (usually in November).

Code changes and documentation

Question Answer Comment
Is the proposed methodology now implemented?
Are the code changes in agreement with the flowchart defined at Preview step?
Are the code changes in agreement with list of routines and variables as proposed at Preview step?
If not, are the discrepancies acceptable?
Is the in-line documentation accurate and sufficient?
Do the code changes comply with NEMO coding standards?
Is the !ticket of development documented with sufficient details for others to understand the impact of the change?
Are the reference manual tex files now updated following the proposed summary in preview section?
Is there a need for some documentation on the web pages (in addition to in-line and reference manual)?
If yes, please describe and ask PI. A yes answer must include all documentation available.
… … …

Review Summary

Is the review fully successful?

Updated on 10/17/2017 13:02:05 by acc

Once review is successful, the development must be scheduled for merge during next Merge Party Meeting.

Last modified 3 years ago Last modified on 2017-07-24T14:33:43+02:00