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CanSIPS - The Canadian Seasonal to Interannual Prediction System

CanSIPS - The Canadian Seasonal to Interannual Prediction System. Meteorological Service of Canada. Juan Sebastian Fontecilla 1 &

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CanSIPS - The Canadian Seasonal to Interannual Prediction System

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  1. CanSIPS - The Canadian Seasonal to Interannual Prediction System Meteorological Service of Canada Juan Sebastian Fontecilla1& Bill Merryfield2, Bertrand Denis1, Slava Kharin2, Woo-Sung Lee2, Jacques Hodgson1, Louis-Philippe Crevier1, Benoit Archambault1, Lewis Poulin1, Ping-An Tan1 1 Canadian Meteorological Centre (CMC) 2 Canadian Centre for Climate Modelling and Analysis (CCCma) CMOS 2012, Montreal

  2. OUTLINE • Background • Description of the new system • Forecast skill improvements • El Nino / La Nina predictions • Future works

  3. Long-Range (Multi-)Decadal IPCC-type projections (scenario dependent) Forcing scenarios PDV/AMV? ENSO soil moisture initial conditions Sources of Predictability Madden-Julian Oscillation atmospheric initial conditions now day week month season year decade century Short Medium Extended Forecast Ranges

  4. Long-Range (Multi-)Decadal IPCC-type projections (scenario dependent) *Not complete Forcing scenarios PDV/AMV? ENSO soil moisture initial conditions Sources of Predictability* Madden-Julian Oscillation atmospheric initial conditions now day week month season year decade century Short Medium Extended Forecast Ranges this talk

  5. Sea Surface Temperature Anomaly El Niño / La Nina

  6. Observed SST anomaly … “Forecast” (persisted) SST anomaly Motivation for coupled vs2-tier system Mar 2006 Apr 2006 Example: consider 2-tier forecast (persisted SSTA) from 1 April 2006 May 2006 Jun 2006 Jul 2006 2-tier system with persisted SSTA cannot predict an El Niño or La Niña Oct 2006

  7. Coupled Historical Forecasting Project II (CHFP2) • 1-tier system -> two atmos-ocean-ice coupled systems • - CanCM3 = AGCM3 (T63/L31) + OGCM4  10 members • + • - CanCM4 = AGCM4(T63/L35) + OGCM4  10 members • 20 Assimilation & forecast streams • “Burst” initialization • - Initial conditions valid just before forecast starts – no time lags • System climatology based on CanCM3 + CanCM4 Hindcasts • - Initialized every month 1981-2010 (30 years)

  8. Nudging (IUA) R R R R 0h 3h 6h 9h 12h 15h 18h

  9. Anomaly correlation skill 2-tier vs CanSIPS 2-tier CanSIPS

  10. First season (Lead 0 months) Global 2m temperature Previous system Previous system Previous system CanSIPS CanSIPS CanSIPS CanCM3 CanCM3 CanCM4 CanCM3 CanCM4 CanCM4

  11. First season Canada 2m temperature Previous system Previous system CanSIPS CanSIPS

  12. First season Canada 2m temperature Previous system Previous system CanSIPS CanSIPS No skill No skill

  13. CanSIPS forecastsJune-July-August 2012 Temperature Precipitation

  14. CanSIPS forecasts June-July-August 2012 Temperature Precipitation

  15. CanSIPS forecasts June-July-August 2012 Temperature Precipitation

  16. ENSO Skill - Nino 3.4 region -

  17. Niño3.4 hindcasts initialized monthly from 1 Jan 1997 to 1 Dec 1997 OBS CanCM4 CanCM3 CanSIPS = CanCM3+4 1997 1998 1997 1998 ENSO Prediction SkillCase Study: 1997-98 El Niño

  18. CanSIPS CanSIPS ENSO Skill Comparison with NCEP CFS CanSIPS vs CFSv1 CanSIPS vs CFSv2

  19. New products - Nino indices - Sea Ice - Tropical cyclone potential - ... New web interface - Menu driven - Interactive display of probability forecasts - Display all hindcasts, verifications CanSIPS phase II implementation

  20. We are considering: More ensemble members Higher resolution Improved ocean data assimilation in CanCM3/4 Add coupled GEM-NEMO (GEM=NWP model) Land surface data assimilation Towards CanSIPSv2

  21. For more information • Details of recent implementations at CMC • http://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/changes_e.html • Environment Canada’s official seasonal forecast web pages • http://www.weatheroffice.gc.ca/saisons/index_e.html • Description of Climate models developed at CCCma • - http://www.ec.gc.ca/ccmac-cccma/default.asp?lang=En&n=4A642EDE-1

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