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S2S Sub-seasonal to Seasonal prediction project Météo-France contribution C. Ardilouze – M. Déqué CNRM-GAME S2S Steering Group meeting, June 25th 2015

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Page 1: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

S2S Sub-seasonal to Seasonal prediction project

Météo-France contribution

 C. Ardilouze – M. Déqué  CNRM-GAME

S2S Steering Group meeting, June 25th 2015

Page 2: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

History and current status

- 2013 : MF sollicited to contribute to the S2S projectOpportunity to explore the gap between NWP and Seasonal Prediction

- 2014 : test data set production

- Winter/spring 2015 : Model resolution upgrade and hindcast production

- May 2015 : First forecast production

To date : ready to go 'operational' (currently in touch with Ioannis Mallas ) 

Page 3: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

Meteo France S2S System

CNRM-CM (Voldoire et al., 2013)

Page 4: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

Meteo France S2S System

 

Hindcast Forecast

Frequency/Length Monthly / 1993-2014 Monthly

Ensemble size 15 51

Initial Conditions Atm./surf : ERA-InterimOcean/sea-ice: Mercator PSY2G2V3 reanalysis

Atm./surface: IFS analysesOcean/sea-ice : Mercator upscaled PSY2G2V3 analyses

Status Completed Start : May. 2015

- Ensemble generation : stochastic dynamics (Batté and Déqué, 2012)

=> applying randomly drawn model error corrections to atmospheric model state fields

Page 5: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

List of provided parameters

77 parameters out of 85 

Missing parameters :

- CAPE- Surface water runoff- Soil Type- Soil Moisture (20 and 100 cm)- Soil Temperature (20 and 100 cm)- Skin Temperature

Page 6: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

Anomaly correlations 2m TemperatureWEEK1 (days 5-11) WEEK2 (days 12-18) WEEK3 (days 19-25)

Feb 1st

May 1st

Aug 1st

Nov 1st

Page 7: S2S Sub-seasonal to Seasonal prediction project Météo-France …s2sprediction.net/file/meetings_presentations/2015_S2Ssteering_Met… · Meteo France S2S System Hindcast Forecast

Future plans

-Short term : Move from monthly to bi-monthly frequency:

  => First monthly set : Day 1 of each calendar month  => Second monthly set : Day 15 of each calendar month

Planned : end of third trimester 2015

-Longer term : 

Initialization : land surface focus

Ensemble generation : test of other stochastic methods