Workshop to analyse and discuss the preliminary results of NEMO in CMIP6 - 19 January 2017 In Grenoble

Organizer: NEMO System Team

Supported by European project IS-ENES2

Last edited 01/18/17 19:20:02 by clevy

Location:

|LGGE 54 rue Molière, Campus of Universite Grenoble-Alpes, Saint Martin d'Heres, Grenoble, France Salle Lliboutry

How to get there:

Take the Tramway line B (green line) towards Gieres - Plaine des Sports and get off at "Les taillées -université" stop, or Tramway line C (magenta line) toward Condillac-Universites and get out at "Hector Berlioz" stop. The LGGE building is nearby, see map in link above.

The ride is approximately 22 minutes from the train station. The Grenoble train station is located at the "Gares" stop and Grenoble city center is located between the "Victor-Hugo" and "Sainte-Claire Les Halles" stops.

Motivations

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

Motivations

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.

The main subject will be to share our experiences and results on ...As for the first meeting, the idea is not to advertise widely this meeting, but rather to share expertise (and possible mistakes!) between the groups directly concerned with this NEMO in CMIP6 work.

Goals

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. All users registered on shaconemo have been contacted.

Proposed agenda

The agenda is organised to share and discuss the results: no sequence of presentations but rather a list of subjects to be discussed by sharing and comparing results of all the available simulations. Please bring your latop, and access to data/plots. Prerequisite is to have the list of experiments available prior to the meeting (please complete, see below).Please complete the list of subjects below by adding :

The subjects on which you would like to show your thoughts or results (and add your name on the line) The subjects on which some inputs of other groups would help (you)

[Time in CET = Grenoble time]

08:30 - 9:00 Welcome coffee

9:00 - 10:30 Methods and principles (Leaders of the session: Matthieu Chevallier & Adam Blaker)

How to properly couple an atmosphere model with an ocean-sea ice model with "enhanced" vertical resolution near surface (ie 1m vs 10m)? Coupled/forced modes: ensuring a clean comparison between the two modes - what choices/compromises have to be made? Coupled mode: closing the ocean energy budget... Coupled mode: representing calving around Antarctica : technical solution and effects in IPSLCM607

"enhanced" vertical resolution near surface (ie 1m vs 10m)? Coupled/forced modes: ensuring a clean comparison between the two modes - what choices/compromises have to be made? Coupled mode: closing the ocean energy budget... Coupled mode: representing calving around Antarctica : technical solution and effects in IPSLCM607

10:30 - 11:00 Coffee break

11:00 - 12:30 Adjustments and tuning (Leaders of the session: Julie Deshayes & L. Brodeau)

ORCA1.L75 in coupled mode: obtaining a realistic North Atl. circulation, i.e, return of deep conv. in Lab. Sea, get rid of fresh/cold surface bias, and AMOC > 12 Sv ORCA1.L75 in coupled mode: getting the mixed layer depths right (min. and max.) ORCA1.L75 in coupled mode: how to reduce biases at 1000m deep in Atlantic (too warm, too salty) ? ORCA1.L75 in coupled/forced mode: classical biases in the North Atlantic Ocean + how to increase Arctic sea ice thickness ORCA1.L75 in coupled mode: North Atlantic, Atlantic at depth and ventilation in the austral ocean

12:30 - 1:30 Lunch (in same room)

1:30 - 2:30 Adjustments and tuning cont' (see above)

2:30 - 3:30 Finding solutions for data requests burden (Proposed leaders of the session: ?? )

Status and tests for dr2xml parser communication

4:00 (at the latest): End of meeting

List of participants :PLEASE UPDATE

Family Name First name Institution email

Please list your location if you intend to use videoconference

Lévy Claire CNRS - NEMO System Team

Chevallier Matthieu CNRM (Meteo France) matthieu.chevallier@… Grenoble

Brodeau Laurent Barcelona Supercomputer Center

laurent.brodeau@…

Kuhlbrodt Till NCAS, University of Reading

t.kuhlbrodt@… Reading, UK

Blaker Adam NOC atb299@… Nurser George NOC g.nurser@… Msadek Rym Cerfacs rym.msadek@… Deshayes Julie CNRS IPSL julie.deshayes@… Grenoble Rousset Clement CNRS clement.rousset@… Grenoble

Moine Marie-Pierre Cerfacs moine@… maybe visio from

Toulouse

Voldoire Aurore CNRM aurore.voldoire@… maybe visio from Toulouse (Cerfacs)

Person Renaud CNRS IPSL renaud.person@… Grenoble Ethe Christian CNRS IPSL Christian.Ethe@… Grenoble Vancoppenolle Martin CNRS IPSL martin.vancoppenolle@… Lille, Visio

Mignot Juliette CNRS IPSL juliette.mignot@… Berlin, Visio

Person Renaud CNRS IPSL renaud.person@… Grenoble Ethe Christian CNRS IPSL Christian.Ethe@… Grenoble Vancoppenolle Martin CNRS IPSL martin.vancoppenolle@… Lille, Visio

Mignot Juliette CNRS IPSL juliette.mignot@… Berlin, Visio perhaps

Mainsant Gildas CNRS IPSL gildas.mainsant@… Grenoble Bricaud Clement Mercator cbricaud@… Grenoble Bourdallé Romain Mercator rbourdal@… Grenoble Sellar Alistair UKMO / UKESM alistair.sellar@… Exeter Jones Colin NCAS / UKESM colin.jones@… Exeter Iovino Dorotea CMCC dorotea.iovino@… Bologna Yool Andrew NOC axy@… Southampton

Favorite questions and subjects to discuss

Please complete

Who What

L. Brodeau ORCA1.L75 in coupled mode: obtaining a realistic North Atl. circulation, i.e, return of deep conv. in Lab. Sea, get rid of fresh/cold surface bias, and AMOC > 12 Sv !

Till Kuhlbrodt ORCA1.L75 in coupled mode: getting the mixed layer depths right (min. and max.), with a view on running NEMO with a biogeochemistry

Adam Blaker ORCA1.L75 in coupled/forced modes: ensuring a clean comparison between the two modes - what choices/compromises have to be made?

Julie Deshayes ORCA1.L75 in coupled mode: how to reduce biases at 1000m deep in Atlantic (too warm, too salty) ?

Matthieu Chevallier

ORCA1.L75 in coupled mode: how to properly couple an atmosphere model with an ocean-sea ice model with "enhanced" vertical resolution near surface (ie 1m vs 10m)? Issues encountered with air-ice fluxes, ocean-ice fluxes, high frequency coupling...

Matthieu Chevallier & Rym Msadek

ORCA1.L75 in coupled mode: closing the ocean energy budget...

Rym Msadek ORCA1.L75 in coupled/forced mode: classical biases in the North Atlantic Ocean + how to increase Arctic sea ice thickness

Juliette Mignot ORCA1.L75 in coupled mode: North Atlantic, Atlantic at depth and ventilation in the austral ocean

Detailed list of experiments in discussion :

PLEASE UPDATE

Institution / Name of PI

Components in play (ORCA1 or ORCA025,

NEMO-OPA, NEMO-LIM or GELATO or CICE, NEMO-TOP or ...

Forced (which forcing), or coupled (which atmosphere)

Specific options if different from shaconemo

Duration of experiment (years)

Comments

Global ~1° Model still to

forcing), or coupled (which atmosphere)

Global ~1°

IPSL ORCA1 LIM3 PISCES Coupled with LMDZ

Model still to be tuned. Ocean options kept as close as possible from Shaconemo. Use of closed seas.

IPSL base version for CMIP6

Met Office/NERC

eORCA1 CICE forced with CORE2

Ocean-only, traceable from eORCA025

68 years Problems with runoff at north fold

Met Office/NERC

eORCA1 CICE Coupled to UM

Ocean/ice configuration fully traceable to ORCA025 GO6, with one adjustment

> 200 years

Basis for UKESM mid 2017. Frozen UK contribution to CMIP6 (including OMIP).

Met Office/NERC

eORCA1 CICE MEDUSA Coupled to UM

Ocean/ice configuration traceable to ORCA025 GO6, with one or two adjustments

Basis for UKESM mid 2017. UK contribution to CMIP6 (including OMIP). Periodically coupled pre-industrial spin-up ongoing

CNRM-CERFACS

eORCA1 NEMOv3.6-GELATO6 coupled with ARPEGEv6-SURFEXv8-CTRIP

close to shaconemo

~160 years with fixed

1990 forcings + ~100 year

PI control

under evaluation

CNRM-CERFACS eORCA1 NEMOv3.6-GELATO6 forced

close to shaconemo

CORE: 1948-2009; DFS5: 1958-2012

under evaluation

IPSL-LOCEAN / Deshayes-Aumont

eORCA1 LIM3 PISCES

forced by CORE2, climato and interannual

60 yr - 500 yr (climato)

still under evaluation / tuning

EC-Earth / Brodeau ORCA1L75 LIM3 forced by

CORE2_CNYF 200 years

SL36C00 (no SSS restoring)

SL36C01 (SSS restoring + nn_ssr=2)

SL36C02 (SSS restoring + nn_sssr=1)Comparison

EC-Earth / FMI ORCA1L75 LIM3 forced by DFS5.2

Sea-ice sensitivity and comparison runs.

nn_sssr=1)Comparison

EC-Earth / FMI ORCA1L75 LIM3 forced by DFS5.2

Sea-ice sensitivity and comparison runs.

EC-Earth / BSC ORCA1L75 LIM3 coupled with IFS 5 years Model blowing up

after 5 years

UCL / Barthélemy ORCA1L75 LIM3

forced by DFS5.2, NCEP or JRA-55; otherwise close to shaconemo

1958-2015 Sea ice sensitivity to the forcing dataset

CMCC ORCA1L50 coupled to CICE/CAM/CLM

EOS80, grid 65 years CMCC base version for CMIP6

CMCC ORCA1L50 + CICE

forced by CORE2 Interannual, EOS80, grid

20 years Evaluation for OMIP (no sss restoring)

Global 1/4°

Met Office/NERC

eORCA025 CICE Coupled to UM

Ocean/ice configuration defined as GO6+GSI8. Limited tuning.

Ocean/ice component of HadGEM3 GC3 - physical model for UKESM. Met Office/UK contribution to CMIP6

Met Office/NERC

eORCA025 CICE MEDUSA coupled to UM

Expected to be GO6 as above. Use DEGRAD for BGC

UKESM 2018 onwards. Physical model GC3. UK contribution to CMIP6 (including OMIP). Ice cavities open?

GEOMAR ORCA025 LIM2 Spatial GM OMIP period Contribution to OMIP

CNRM-CERFACS eORCA025 NEMOv3.6-GELATO6 forced

CORE: 1948-2009; DFS5: 1958-2012

NEMO_v3_6_STABLE

IPSL-LGGE / Deshayes-LeSommer

eORCA025 LIM3forced by DFS, CORE2 interannual

CORE (+10 yr) still under development

Mercator Ocean / Bricaud Bourdalle badie

eORCA025 LIM3_PISCES

forced by ERAi

Erai period (1979-2014)

development / evaluation, not involved in CMIP6, working on coarsening for BCG

FMI ORCA025 LIM3 forced by ERAi

Erai period (1979-2015)

Now in 2012. Mainly for sea-ice evaluation.

BSC-ES ORCA025 LIM3 forced by DFS5.2 1958-1982

Comparison with a ORCA1 simulation: effect on sea ice growth

CMCC ORCA025L50 + forced by CORE2 20 years Evaluation for OMIP

BSC-ES ORCA025 LIM3 forced by DFS5.2 1958-1982 ORCA1 simulation:

effect on sea ice growth

CMCC ORCA025L50 + CICE

forced by CORE2 Interannual, EOS80, grid

20 years Evaluation for OMIP (no sss restoring)

Global 1/12°

BSC ORCA012 LIM3 Forced by DFS5.2

4 months from 01/01/1989

Issues with XIO server and data storage (stopped)

SMHI ORCA1L75 LIM3 coupled to IFS

PD-simulations 20-50 years

Arctic sea ice explodes