Detailed model description
Page containing details for all model configurations available in S2S since the project start => KMA model description
Overview of the model changes
| Model version | Implement. date in S2S | Time range | Resolution | Ens. Size | Frequency | Re-forecasts | Rfc period | Rfc frequency | Rfc size | Ocean resolution | Active Sea Ice | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
GloSea6-GC3.2 | 01/06/2023 | d 0-60 | N216 L85 (0.83° x 0.56°, about 60 km in mid latitudes) | 8 | daily | on the fly | 1993-2016 | 4/month (always on the 1st, 9th, 17th and 25th) | 7 | yes | 9 ocean parameters added | |
GloSea6-GC3.2 | 22/02/2022 | d 0-60 | N216 L85 (0.83° x 0.56°, about 60 km in mid latitudes) | 4 | daily | on the fly | 1993-2016 | 4/month (always on the 1st, 9th, 17th and 25th) | 3 | yes | ||
| GloSea5-GC2 | 01/09/2020 | d 0-60 | N216 L85 (0.83° x 0.56°, about 60 km in mid latitudes) | 4 | daily | on the fly | 1991-2016 | 4/month (always on the 1st, 9th, 17th and 25th) | 3 | yes | Nine additional parameters allowing computing MJO indices added since 01/08/2020 to the real-time data and since 01/09/2020 to the reforecasts. Specific Humidity on pressure level provided since 01/08/2020 | |
| GloSea5-GC2 | 01/11/2016 | d 0-60 | N216 L85 (0.83° x 0.56°, about 60 km in mid latitudes) | 4 | daily | on the fly | 1991-2010 | 4/month (always on the 1st, 9th, 17th and 25th) | 3 | yes |
Description of the main changes
01-09-2020
Extension of the reforecast period from 1991-2010 to 1991-2016.
01-08-2020
Nine additional parameters allowing computing MJO indices were added to the KMA outputs starting from 1 August 2020 for the real-time forecasts and from 1 September for the on-the-fly reforecasts:
- Snow Fall water equivalent
- Surface net solar radiation
- Surface net thermal radiation
- Surface solar radiation downwards
- Surface thermal radiation downwards
- Top net thermal radiation
- Sea surface temperature
- Total Cloud Cover
- Specific humidity (on pressure levels)
31-10-2017
In reference to Tennant(2013), the soil moisture content(SMC) and surface temperature perturbations were added to KMA’s Global Ensemble system. It should improve predictive performance of the surface variations that have a smaller spread than the upper level one. Together with SST perturbation, it helps improving the spread of surface temperature and moisture.
References: Tennant. W, 2013: New schemes to perturb sea-surface temperature and soil moisture content in MOGREPS. Q.J.R.Meteorol. Soc., 140, 1150-1160