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| Date | Event |
|---|---|
| 22 Sep 2016 | Initial announcement via e-mail to Member States contact points |
| Week beginning 17 Oct 2016 | Availability of test data in dissemination and confirmation of implementation date |
| 22 Nov 2016 | Expected date of implementation |
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The horizontal and vertical resolutions of the ocean model (NEMO v3.4.1) used by ENS is increased from 1 degree and 42 layers to 0.25 degree and 75 layers (ORCA025Z75). An interactive sea-ice model (the Louvain-la-Neuve Sea Ice Model - LIM2) is introduced so that sea-ice cover evolves dynamically. Previously it was persisted for 15 days; over the next 30 days of the forecast, it was relaxed towards the climatology of the previous 5 years.
Ocean initial conditions are taken from ORAS5 instead of ORAS4.
A global fix for tendency perturbations in the stochastic model error scheme SPPT to improve conservation of humidityglobal momentum, energy and moisture conservation properties.
New model output parameters
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| Old | New | |
|---|---|---|
| Ocean model version | NEMO v3.4.1 | NEMO v3.4.1 |
| Configuration | ORCA1Z42 | ORCA025Z75 |
Horizontal resolution | 1.0° | 0.25° |
| Vertical layers | 42 | 75 |
| Time step | 3600s | 1200s |
| Initial conditions | ORAS4 OCEAN4 using NEMO v3.0 | ORAS5 OCEAN5 using NEMO v3.4.1 |
| Sea-ice coupling | None | LIM2 |
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