Artificial Intelligence Forecasting System Single model (AIFS Single)

Table 1: Key characteristics of the AIFS Single based on AIFS Single v1

 

Forecast / Analysis

Number of members

Horizontal resolution

Vertical levels (hPa)

Pressure at model top (hPa)

Perturbation models

Atmospheric Model

Forecast

  • 0–15 days

1

  •  Native  (1):   N320  ~31km
  •  Interpolated  (2):  0.25° 

13(3)

50 hPa

No

Artificial Intelligence Forecasting System Ensemble model (AIFS ENS)

Table 2: Key characteristics of the AIFS ENS based on AIFS ENS v1

 

Forecast / Analysis

Number of members

Horizontal resolution

Vertical levels 
(hPa)

Pressure at model top (hPa)

Perturbation models

ENS
Ensemble - Atmospheric Model

Forecast

  • 0–15 days

50+1

  •  Native  (1):   N320  ~31km
  •  Interpolated  (2):  0.25° 

13(3)

50 hPa

Yes(4)

(1)  Native: as produced by the model on reduced Gaussian grids or spherical harmonics.

(2)  Interpolated to lat/lon

(3) Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 850, 925, 1000 (hPa)

(4)  in analysis and model noise embedding