Ch. Cassou, E. Maisonnave (CERFACS) P. Marquet (CNRM) Status of the CERFACS Coupled Model for WP4 Dynamite Meeting Bucharest 2006

Status of the CERFACS coupled model for WP4

1. Model components ARPEGE-IFS: V4.5 (Meteo-France, ECMWF) DYN1

Dynamics : T63 (~1.8

o x1.8

o lon) Physics: Reduced linear T42 (~2.8

o x2.8

o lon)

TRIP [Total Runoff Integrating Pathway] (Univ. of Tokyo)

(~1 o x1 o lon)

VIMA OASIS3 (Cerfacs) LIM (Louvain Ice Model)

Same grid as ORCA

NEMO [OPA.9-ORCA] (LOCEAN)

2 o x2 o on average+ 3 poles (South, Siberia, Canadian Northern Territories) Increased resolution along the equator And in the Med. Sea.

10yr with restoring followed by 50yr of integration

Status of the CERFACS coupled model for WP4

The model has a great NAO and nice variability modes in the North Atlantic DYN1 2. Promising start The model DOES have a promising ENSO VIMA Nino3 index EOF for Winter MSLP DYN2

Status of the CERFACS coupled model for WP4

Difference between Model mean state and observed SST DYN1 DJF 3. But… it has some biases Difference between Model mean CRF and observed CRF VIMA Too shallow oceanic Mixed layer: Reformulation of TKE in NEMO DYN2 JJA

Status of the CERFACS coupled model for WP4

Model Ice concentration 50% observed ice cover limit DYN1 JFM 4. Model performance for SH ice JAS VIMA Ice volume

Status of the CERFACS coupled model for WP4

Ice concentration JFM 5. Model performance for NH ice JAS Ice volume

Status of the CERFACS coupled model for WP4

Global SST Diff between model and observed (ERBE) Annual Radiative Budget @TOA 6. Drifts 3D Global Ocean Temperature Annual Radiative Budget @TOA + 3 W/m 2

Status of the CERFACS coupled model for WP4

A promising start but… … we have to find a physical way to balance the model energy before long integrations… 7. Conclusions