www.esmf.ucar.edu

ESMF Application Status

GMAO Seasonal Forecast

NCAR/LANL CCSM

NCEP Forecast

GFDL FMS Suite

MITgcm

NCEP/GMAO Analysis

ClimateData Assimilation

Weather

Arlindo da SilvaESMF Interagency Working Group Meeting

www.esmf.ucar.edu

Modeling CodesSOURCE APPLICATION

GFDL FMS B-grid atmosphere

FMS spectral atmosphere

FMS MOM4 ocean model

MIT MITgcm coupled atmosphere/ocean

MITgcm regional and global ocean

GMAO GMAO atmospheric GCM coupled with ocean GCM

NCAR/LANL CCSM2 including CAM and CLM coupled with POP ocean and data ice model

www.esmf.ucar.edu

Data Assimilation Codes

SOURCE APPLICATION

GMAO Gridpoint Statistical Interpolation (GSI) System (joint with NCEP)

replaces Physical-space Statistical Analysis System (PSAS)

GEOS-5 Atmospheric General Circulation Model

replaces NSIPP Atmospheric General Circulation Model

NCEP Gridpoint Statistical Interpolation (GSI) System (joint with GMAO)

replaces Spectral Statistical Interpolation (SSI)

Global Spectral Forecasting Model

WRF regional atmospheric model at 22km resolution CONUS forecast

GMAO ODAS with OI analysis system with ~10K observations/day

MIT MITgcm century / millennium adjoint sensitivity

www.esmf.ucar.edu

ESMF Interoperability DemonstrationsCOUPLED CONFIGURATION NEW SCIENCE ENABLED

GFDL B-grid atm / MITgcm ocn Global biogeochemistry (CO2, O2), SI timescales.

GFDL MOM4 / NCEP forecast NCEP seasonal forecasting system.

GMAO ocean / LANL CICE Sea ice model for extension of SI system to centennial time scales.

NSIPP atm / NCEP analysis Assimilated initial state for SI.

GMAO GEOS-5/ NCEP GSI Intercomparison of systems for NASA/NOAA joint center for satellite data assimilation.

NCAR fvCAM/ NCEP analysis Intercomparison of systems for NASA/NOAA joint center for satellite data assimilation.

NCAR CAM / MITgcm ocn Improved climate predictive capability: climate sensitivity to large component interchange, optimized initial conditions.

NCEP WRF / Ocean Model Development of hurricane prediction capability.

www.esmf.ucar.edu

Interoperability Experiment

Legend1. Base version of both codes in experiment selected, and configuration decided upon (e.g. target platform, one/two way coupling, fields sent, duration).

2. Both codes run standalone as ESMF components, using component constructs but not necessarily creating valid states.

3. Fields that will be in import/export states of both codes match up with each other.4. Both codes create valid ESMF import/export states, including fields with ESMF

grids.5. Draft coupler is written and full system with codes, stub coupler, and ESMF can

be linked and run on target platform.6. One field is transferred in some manner in one direction through the coupler.7. ESMF regridding is used if needed.8. All fields active in the experiment are correctly transferred and the experiment

verified by outside source.

www.esmf.ucar.edu

Interoperability Experiment Status

0 1 2 3 4 5 6 7 8

GFDL B-Grid Atm/MITgcm Ocean

GFDL MOM4 Ocean/NCEP Atm

GMAO Ocean/LANL CICE

Aries Atm/SSI Analysis

fvCAM/SSI Analysis

GEOS-5 Atm/GSI Analysis

CAM/MITgcm Ocean

WRF/ Regional Ocean

TARBALL

www.esmf.ucar.edu

ESMF Adoption LegendInfrastructure (i = 1…6)

Number indicates how many ESMF utilities are being used internal to the code.Superstructure (i=1…8)• Base version of code selected, and configuration decided on (includes version, target

platform, validation criteria).• User component is restructured in an ESMF manner, but may not use ESMF software.• User component builds valid states and presents standard ESMF interfaces.• All gridded components run as ESMF stand-alone components - complete for non-

coupled applications.• A system with all components and stub coupler(s) links and runs, even though the

coupler may not do anything, or may not use ESMF regridding.• One field is transferred in some manner through the coupled system.• ESMF regridding is used if needed.• All active fields are correctly transferred, and experiment is verified by outside source.

www.esmf.ucar.edu

ESMF Adoption Status0 1 2 3 4 5 6 7 8

EVA Test Atmosphere

EVA Test Coupled Atm/Ocn

GFDL B-Grid Atm

GFDL Spectral Atm

GFDL MOM4 Ocean

MITgcm Coupled Atm/Ocn

MITgcm Regional Ocn

NCAR CAM / fvCAM

NCAR CLM

LANL POP

LANL CICE

CCSM

GEOS-5 Coupled Atm/Ocn

NCEP GFS

NCEP SSI

NCEP/NCAR WRF

ODAS w ith NSIPP Ocn

MITgcm Adjoint

GSI Analysis

GEOS-5 Atmosphere

Superstructure

Infrastructure

TARBALL

TARBALL

www.esmf.ucar.edu

Specific Applications in first three demonstrations

SOURCE APPLICATION

GFDL FMS B-grid atmosphere at N45L18

MIT MITgcm ocean at 2.8°x2.8° ocean L15

NCAR

NCEP

fvCAM at 2°x2.5°

SSI analysis system with 250K observations/day, 2 tracers

Sources are available over the web through ESMF site.•Each demonstrates how ESMF solves the technical aspects of software interoperability, not the science of building and coupling systems

www.esmf.ucar.edu

NCAR Climate Model meetsNCEP Data Assimilation

NCAR Finite-volume Community Atmospheric Model (fvCAM)• Finite-volume Dynamical Core developed at NASA/GSFC by S.-J. Lin• Latest NCAR Physics packages

NCEP Spectral Statistical Interpolation (SSI) System• Assimilates a wealth of conventional and satellite data• Demo utilizes same observational stream used operationally at NCEP

For this Demo, we have developed both fvCAM and SSI as ESMF Grid Components and coupled them using ESMF services.

This is the first time a state-of-the-art data assimilation system in coupled to the CAM

ESMF GRIDDED COMPONENT

NCARfvCAM

ESMF COUPLER COMPONENT

NCEPSSI

ESMF GRIDDED COMPONENT

www.esmf.ucar.edu

fvCAM/SSI: Sea Level Pressure

www.esmf.ucar.edu

NCAR fvCAM ENCAPSULATED AS

ESMF GRIDDED COMPONENT

NCARfvCAM

MITgcm ENCAPSULATED AS

ESMF GRIDDED COMPONENT

MITgcm

MITgcm – CAM InteroperabilityIn this experiment CAM is configured with 2 degree latitudinal resolution and 2.5 degree longitudinal resolution, resulting in a computational grid that is 144x90 grid points in the horizontal. The MITgcm ocean configuration uses 2.8125 degree resolution both zonally and meridionally. Both configurations execute domain decomposed into sixteen latitude circles, but at different resolutions. The experiment runs on 16 cpu’s and an ESMF coupler component using parallel ESMF_Regrid is used to map between them.Demonstration is done passing SST from ocean to atmosphere.

ESMF COUPLER COMPONENT

www.esmf.ucar.edu

GFDL ALS

GFDL atmosphere-land-seaice

(ALS) composite

MITgcm Ocean

MITgcm ENCAPSULATED AS

ESMF GRIDDED COMPONENT

GFDL Atm – MITgcm Interoperability

In this experiment the atmosphere-land-ice composite component is configured with 2 degree latitudinal resolution and 2.5 degree longitudinal resolution, resulting in a computational grid that is 144x90 grid points in the horizontal. The MITgcm ocean configuration uses 2.8125 degree resolution both zonally and meridionally. The MITgcm configurations executes domain decomposed into thirty latitude circles. The atmosphere component executes decomposed into thirty longitude bands. Demonstration is done passing SST from ocean to atmosphere on 30 CPU’s. In this experiment the parallel regrid must map from latitude circle decomposition to longitude band decomposition.

ESMF COUPLER COMPONENT

www.esmf.ucar.edu

Timeline and Status

Spring 2003

Spring 2004

First API and software release with Community Meeting review

First 3 interoperability experiments completed

Summer 2004 Second API and software release (ESMF 2.0) with Community Meeting review.

Winter 2004 Five interoperability experiments completed; all codes partially ESMF-compliant

Summer 2005 All interoperability experiments complete. All codes fully ESMF-compliant.

Winter 2005 Final software release