NOAA Global Modeling Workshop 12-13 January 2006NOAA/ESRL FIM Contribution toward future NOAA global modeling system Developed at ESRL, collaboration so.

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Presentation transcript:

NOAA Global Modeling Workshop January 2006NOAA/ESRL FIM Contribution toward future NOAA global modeling system Developed at ESRL, collaboration so far with GFDL, EMC NOAA/ESRL Status on Development of FIM Flow-following FV Icosahedral Model Sandy MacDonald Jin-luen Lee Rainer Bleck Stan Benjamin John Brown - presented by Stan Benjamin Courtesy – D. Randall

NOAA Global Modeling Workshop January 2006NOAA/ESRL FIM Dynamic Core Finite volume, flux form equations in horizontal (planned - Piecewise Parabolic Method) Hybrid isentropic-sigma ALE vertical coordinate (arbitrary Lagrangian-Eulerian) - Flow-following Icosahedral grid, with spring dynamics implementation

NOAA Global Modeling Workshop January 2006NOAA/ESRL Goals for NOAA future model development (per GSD) Design for weather (1h to 2 weeks) and climate applications Applicable at 1-4 km resolution Accurate for moisture, entropy, and tracer transport Quasi-Lagrangian vertical coordinate Minimize cross-coordinate vertical transport Grid with nearly constant map scale without singularities Contribute diversity to NCEP global ensemble system

NOAA Global Modeling Workshop January 2006NOAA/ESRL FIM development – Task Plan FY2006 Goals Overall - Complete global circulation model (GCM) version Incorporate GFS physics package Perform idealized tests (e.g., Held-Suarez, transport of actual vs. proxy PV,  e ) Design for optimal computational efficiency on non-structured (icosahedral) horizontal grid Design appropriate  -  ALE coordinate for global 1-20km application FY2007 Goals Switch from idealized to observed initial conditions Work with EMC on incorporating FIM dynamic core into FY07 GFS version suitable for alternative dynamic cores Develop non-hydrostatic version of FIM Collaborate with other NOAA research partners to develop and test further refinements

NOAA Global Modeling Workshop January 2006NOAA/ESRL Icosahedral grid 6 rhombi covering sphere All point volumes - hexagons (except 12 points at rhombi corners - pentagons) Map-scale factor variation – 0.95 Grid resolution example - level-5 icosahedral grid – 240km resolution) ((2**n)**2)* = no. cells 5 th level - (32**2)* = ~240km resolution 6 th level – cells ~120km resolution 7 th level – cells ~60km resolution 8 th level – 655,362 cells ~30km resolution 9 th level – 2,621,442 cells ~15km resolution

NOAA Global Modeling Workshop January 2006NOAA/ESRL Diagrams - Randall et al. – Colorado State University 240km icosahedral grid Level-5 – polygons

NOAA Global Modeling Workshop January 2006NOAA/ESRL Grid Structure Finite volume application - flux into each from from surrounding donor cells - S.-J. Lin formulation for lat/lon global model, successfully adapted to icosahedral grid by Lee and MacDonald in collaboration with Lin

NOAA Global Modeling Workshop January 2006NOAA/ESRL Test of 2-layer version of FIM – baroclinic instability Initial condition set with sloping temperature gradient Grid-level 5 – 240 km resolution, no physics

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL

NOAA Global Modeling Workshop January 2006NOAA/ESRL FIM design – vertical coordinate Hybrid (sigma/ isentropic) vertical coordinate of the arbitrary Lagrangian-Eulerian (ALE) flavor Used in NCEP Rapid Update Cycle (RUC) model Used in HYCOM ocean model Builds on work by RUC group (Stan Benjamin), Rainer Bleck, non-ALE flavors of CSU group (Dave Randall), Henry Juang (EMC) and others... Applicable down to 1-km non-hydrostatic scale by using larger-scale 3-d isentropic variation as part of FIM target coordinate definition

NOAA Global Modeling Workshop January 2006NOAA/ESRL "Hybrid" means different things to different people: - linear combination of 2 or more conventional coordinates (examples: sigma, z+rho, z+rho+sigma) - ALE (Arbitrary Lagrangian-Eulerian) coordinate ALE maximizes size of isopycnic subdomain (isentropic subdomain for atmospheric model) - From Rainer Bleck HYCOM/ocean model talk

NOAA Global Modeling Workshop January 2006NOAA/ESRL Terrain height - dm Test applicability of RUC-like hybrid  -  ALE coordinate to global domain NAM data interpolated to current RUC coordinate using Asia terrain field -13km dx Case – 12h NAM data valid 30 Aug UTC

NOAA Global Modeling Workshop January 2006NOAA/ESRL NAM data interpolated to current RUC coordinate using Asia terrain field -13km dx Case – 12h NAM data valid 30 Aug UTC Adjustments planned Relaxed sigma layer compression up to 400 hPa Reference  v levels down to 200 K (currently 232K in RUC) South North

NOAA Global Modeling Workshop January 2006NOAA/ESRL FIM development – Task Plan FY2006 Goals Overall - Complete global circulation model (GCM) version Incorporate GFS physics package Perform idealized tests (e.g., Held-Suarez, transport of actual vs. proxy PV,  e ) Design for optimal computational efficiency on non-structured (icosahedral) horizontal grid Design appropriate  -  ALE coordinate for global 1-20km application FY2007 Goals Switch from idealized to observed initial conditions Work with EMC on incorporating FIM dynamic core into FY07 GFS version suitable for alternative dynamic cores Develop non-hydrostatic version of FIM Collaborate with other NOAA research partners to develop and test further refinements,