Version 7 (modified by clevy, 5 years ago) (diff)

Workshop to analyse and discuss the preliminary results of NEMO in CMIP6 - 28 & 29 January 2016 in Grenoble - France

Organizer: NEMO System Team


All the groups involved in the CMIP6 experiments are now setting up and testing their configurations (ESM or forced ocean in OCMIP). For those using NEMO or part of it as ocean, sea-ice and or biogeochemical component, it appears to be useful to share the analysis of their preparatory simulations in order to identify the robust results, the weaknesses and possible improvements.


Comparing results of NEMO in mainly 2 different global resolutions in different experiments, i.e forced or coupled with different atmospheric models can allow us to better understand and hopefully correct some biais by discriminating the adjustments of the coupled mode from the internal errors of the ocean model.

NEMO configurations in play :

All groups are expected to be using nemo.v3_6_STABLE version of the platform. The configurations should be the ones used in CMIP6. The list below describes geographical extension and model resolution. All combination of NEMO components: dynamics, with or without NEMO sea-ice (LIM) or biogeochemistry(PISCES) are welcome.
ORCA1, ORCA025, …?

Invited groups

In order to facilitate extensive discussions on strengths and weaknesses of the results, we propose not to open the meeting widely, but to decide the list of invited groups.

Proposed agenda

A 1.5 / 2 days meeting is suggested, in order to have time to share and discuss the results. Meeting should take place after preliminary analysis of a first set of experiments going on now, but earlier enough for each group to take benefits of discussions for the CMIP6 experiments. Agenda of the meeting should also be discussed: sessions by configuration, by MIP, by open questions (for example: adjustment of vertical parametrization in coupled mode, or coupling frequency…).
Prerequisite is to have the list of experiments available prior to the meeting (see below).

List of subjects to discuss (more soon with your feedbacks):
The following list concerns ORCA1 in forced and coupled mode, and ORCA025 if available

Scientific results:

  • High latitude processes (ice, dense water formation, fresh water fluxes…)
  • Mid and low latitude processes (gyre circulation, western boundary currents, horizontal turbulence (GM…), TKE)
  • Conservation properties

Technical issues:

  • Issues on the coupling via OASIS-MCT
  • CMIP6 diagnostics and their implementation in NEMO

Plans for future tests and eventually date of next meeting

Practical details

List of participants

Family Name First name Institution email

Detailed list of experiments in discussion

Institution/Name? of PI Components in play (ORCA1 or ORCA025,
Forced (which forcing), or coupled (which atmosphere)
Specific options if different from shaconemo Duration of experiment (years) Comments