Page History

...

• • is run four times daily:
    • base times 00 UTC and 12 UTC, producing a 10 day forecast (T+0 to T+240) and also a 15 day forecast (T+0 to T+360).
    • base times 06UTC and 18UTC, producing a 6 day forecast (T+0 to T+144). Results from these runs are:
      • used in Early cut off analysis (SCDA) and Long window data analysis (LWDA).
      • disseminated T+0 to T+72.
  • has horizontal resolution of 9 Km and vertical resolution of 137 model levels.  These values are the same as those of the High Resolution (HRES) in earlier IFS versions.
  • has land-atmosphere and ocean-atmosphere coupling.
  • has 50 ensemble members plus an unperturbed control member (CTRL).
  • the unperturbed control member (CTRL) corresponds to the High Resolution (HRES).
  • documentation gives details of medium range products and dissemination schedules

The ensemble consists of one unperturbed control member (CTRL) and 50 perturbed members that .  These are similar to the control member but their differ only that initial states and model physics have been perturbed to explore .  This allows  exploration of the currently understood range of uncertainty in the observations and the model.   A set of medium range re-forecasts provide a basis for the medium range model climate medium range model climate (M-Climate).

...