the geos-5 aogcm list of co-authors yury vikhliaev max suarez michele rienecker jelena marshak, bin...
TRANSCRIPT
The GEOS-5 AOGCM
List of co-authors
Yury VikhliaevMax Suarez
Michele Rienecker
Jelena Marshak, Bin Zhao, Robin Kovack, Yehui Chang,Jossy Jacob, Larry Takacs, Andrea Molod, Siegfried Schubert
NASA Global Modeling Initiative chemistry
NOAA/GFDL dynamics
DOE/LANL sea ice model
GSFC/GOCART/Aerosols
2
GEOS-5 Model for CMIP5
GMAO physics
GMAO Land surfaceNOAA/GFDL ocean
For time-slice chemistry-climate simulations
IPCC aerosol and trace gas concentrations
Ocean Model on OGCM GridOcean Model on OGCM Grid
Air-sea Interface Component On Exchange gridAir-sea Interface Component On Exchange grid
Atmospheric Model on AGCM Grid (GEOS-5)
Atmospheric Model on AGCM Grid (GEOS-5)
Ocean Dynamics and Transport(MOM4)
Ocean Dynamics and Transport(MOM4)
Diurnal Layer(Price)
Diurnal Layer(Price)
Surface Wind, Air Temperature,Specific Humidity,other atmos constituents
Momentum, Heat, Moisture fluxes,Gas Exchanges
Mixed Layer Currents, Temperature, Salinity, etc
Momentum, Heat , Fresh Water, and Salt Fluxes
Gas Exchanges
Sea IceThermodynamics
(CICE)
Sea IceThermodynamics
(CICE)
Sea Ice Dynamics(CICE)
Sea Ice Dynamics(CICE)
All air-sea exchanges areimplicit in time
Ocean Radiation(NOMB)
Ocean Radiation(NOMB)
Ocean Biology(NOMB)
Ocean Biology(NOMB)
GEOS-5 AOGCM Coupling Configuration
GEOS-5 AGCM Component20 resolution with 72 vertical levels up to 0.01hPa
Finite volume dynamic core (lat-lon version)
Physics
Chou Radiation: shortwave, long wave
Turbulent mixing: vertical diffusion, PBL parametrization,
GWD.
LSM: Catchment (Koster)
Moist: RAS convection, Bacmeister moist physics
Prescribed aerosols and ozone
OceanMOM4
B-grid, tripolar, Z-coordinate
Two configurations
1° (0.5° equatorial refinement) x 50 levels
0.5° (0.25° equatorial refinement) x 40 levels
KPP vertical mixing
Isoneutral horizontal mixing
Anisotropic horizontal viscosity
Sea ice: CICE (LANL)
Target Projects for GEOS-5 AOGCM
ODAS (weakly coupled assimilation)
CMIP-5 Decadal climate simulations
Seasonal climate predictions
Validation Run
AGCM 144x91x72
OGCM 360x200x50
~100 years
Initial conditions: Levitus T and S, steady state
ocean; atmospheric state from uncoupled
experiment.
Zonal Mean Temperature
Coupled Uncoupled
TOA Radiation
Coupled Uncoupled
300mb Eddy Height
Coupled Uncoupled
Sea Level Pressure
Coupled Uncoupled
Total
Precipitation
SST Bias
SSS Bias
Zonal Mean Temperature
Zonal Mean Salinity
Equatorial Pacific SST
Equatorial Pacific SST Annual Cycle
Equatorial Pacific Zonal Wind Stress
Equatorial Pacific Taux Annual Cycle
Equatorial Pacific T,S
Equatorial Undercurrent
Equatorial Surface Currents
Equatorial Pacific T
GEOS5
TAO
Equatorial Pacific U
GEOS5
ADCP
Sea Ice Fraction, DJF
Sea Ice Fraction, JJA
Variability
MJO (daily precipitation) – get Wheeler-Kiladis
diagram from Yehui Chang
ENSO (nino3 ts, map (variance))
PDO? (compare to HADSST)
NAO?
Leading Mode of Global SSTGEOS5 HadlSST
Leading Mode of Global SSTGEOS5 HadlSST
ENSO Teleconnections
Coupled Uncoupled
Results of Replaying AOGCM to Scout Reanalysis (1982-2005)
GODAS
SODA
Replay
35°C
GMAO will contribute decadal prediction runs
GEOS-5 AOGCM: • Initialized using weakly coupled atmosphere-ocean data assimilation based on
MERRA• Includes aerosol direct effects
10-year, five-member ensemble predictions with 1º AGCM, 1/2º OGCM
30-year, five-member ensemble predictions with 2º AGCM, 1/2º OGCM
20th Century simulations with 2º AGCM, 1/2º OGCM, include a 10-member ensemble of free-running model and a MERRA-constrained run
Additional simulations with GEOS-CCM will include atmospheric chemistry-climate interactions
Simulations distributed through NCCS Earth System Grid node.
NASA GMAO Decadal Prediction Runs
37
T300 T300 Anomaly
70S – 70N
30N – 70N
Updated diagnostics - Upper oceanAverage T in upper 300m
Updated diagnostics - Upper oceanAverage T in upper 300m
Legend
30S – 30N
70S – 30S
For CMIP5 forecasts will use anomaly assimilation to reduce the impacts of climate drift – still testing the initialization.
Summary
Acknowledgments