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Tolman, May 13, 2015JCSDA NWS overview, 1/11 JCSDA Activities and Plans NWS overview & plans Hendrik L. Tolman Director, Environmental Modeling Center NOAA / NWS / NCEP Hendrik.Tolman@NOAA.gov
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Tolman, May 13, 2015JCSDA NWS overview, 2/11 Intro Overview Many activities ongoing: Global Model, hybrid ensemble 4DVAR FY16Q1, Sandy Supplemental. Ensemble based for other systems HWRF TDR, ….. NCODA for oceans. Waves in RTMA GSI DA. YOPP, ice DA. Many, many instruments (JPSS, GOES-R, ….) CRTM Need more resources.
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Tolman, May 13, 2015JCSDA NWS overview, 3/11 Intro But … There are many systematic changes in NWS operational modeling, focus on that here. Driving forces for operational modeling suite: UCACN and NCEP strategic plan. UMAC. Unified modeling, coupled DA. In he context of progressing with existing approaches while the new approaches are implemented incrementally.
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Tolman, May 13, 2015JCSDA NWS overview, 4/11 NCEP driving forces UCAN report and NCEP Strategic plan EMC modeling directions: Toward unified modeling: Simplify Production Suite. But ….. also add more: New elements in the environmental modeling suite. Reforecast for postprocessing of model results. Be more nimble, faster model improvements. But …… changes require much work on post-processing side, so change less often ….. EMC do more do less change faster change slower modeling strategy
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Tolman, May 13, 2015JCSDA NWS overview, 5/11 Strategic approach: UMAC UCACN Model Advisory Board (UMAC) Review production suite Strategic level. Team from academia. Stakeholders (including contributors) to be heard, but not on the panel itself. Global unification ? Following slides on global are tentative …. Next Generation Global Prediction System (NGGPS). High Resolution Rapid Refresh and ensembles. Everything in between Essential point of reference for NCEP
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Tolman, May 13, 2015JCSDA NWS overview, 6/11 Software architecture Software architecture considerations play an important role in the business model. Modular code design based on NEMS. ESMF, NUOPC. Dealing with component models in coupled modeling approach as “plug and play”. Separating dynamic core from physics in weather models. Modular unified postprocessing etc. What used to be a full forklift model upgrade can now be much less intrusive, leveraging modular NEMS features. NGGPS dynamic core upgrade can now tentatively be a core upgrade in NEMS, rather than building an entire new modeling suite. Targeting five year project. Upgrade of GFS rather than running old and new side-by-side for many years.
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Tolman, May 13, 2015JCSDA NWS overview, 7/11 NGGPS and NEMS / ESMF Modular modeling, using ESMF to modularize elements in fully coupled unified global model ( + ionosphere, ecosystems, …… )
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Tolman, May 13, 2015JCSDA NWS overview, 8/11 Whole Atmosphere Model Unified Global Model Application = Ensemble + Reanalysis + Reforecast NGGPS Unified Global Coupled Model “GFS”“GEFS”“CFS” Short term weather Week 2 through 4-6 Seasonal & annual 1 y2 y4 yUpdate cycle 3 y20-25 y1979 - presentReanalysis 6h6-24h???cycling WCOSS WCOSS ?where
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Tolman, May 13, 2015JCSDA NWS overview, 9/11 Coupled DA Proof of Concept Coupling models and coupled DA. Atmosphere: Hybrid 4D-EnVAR approach using a 80- member coupled forecast and analysis ensemble, with Semi-lagrangian dynamics, and 128 levels in the vertical hybrid sigma/pressure coordinates. Ocean/Seaice: GFDL MOM5.1/MOM6 and/or HYCOM for the ocean and sea-ice coupling, using the NEMS coupler. Aerosols: Inline GOCART for aerosol coupling. Waves: Inline WAVEWATCH III for wave coupling. Land: Inline Noah Land Model for land coupling.
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Tolman, May 13, 2015JCSDA NWS overview, 10/11 Coupled Model Ensemble Forecast NEMS OCEAN SEA-ICE WAVE LAND AERO ATMOS Ensemble Analysis (N Members) OUTPUT Coupled Ensemble Forecast (N members) INPUT Coupled Model Ensemble Forecast NEMS OCEAN SEA-ICE WAVE LAND AERO ATMOS NCEP Coupled Hybrid Data Assimilation and Forecast System
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Tolman, May 13, 2015JCSDA NWS overview, 11/11
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