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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
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Changes:
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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