The IFS Cycle 50r1, will bringmajor changes to the IFS model and data assimilation system, including among many others:
New ocean and sea ice models based on NEMO4-SI3
Updates of the wave model including: new wave interaction with sea ice and ocean currents and revised wave model bathymetry
Modified Stochastically Perturbed Parametrisation (SPP) configuration to reduce 10-metre wind spread in the ensemble
New ocean and sea ice ensemble analysis system & outer loop coupling of ocean/sea-ice
Weak constraint formulation extended to the boundary layer allowing the increased use of T2m observations
After making the high-resolution forecast (HRES) and 'control' member of medium range ensemble forecast (ENS control) identical in IFS Cycle 49r1, , with this model upgrade we will stop producing the current ENS control, and the data stream that was formerly called the HRES will be called ENS control instead.
More detailed information will be made available in the coming weeks.