1. U.S. GODAE: Global Ocean Prediction with
Community Effort: NRL, FSU, U. of Miami, NASA-GISS, NOAA/NCEP, NOAA/AOML, NOAA/PMEL, PSI, FNMOC, NAVOCEANO, SHOM, LEGI, OPeNDAP, UNC, Rutgers, USF, Fugro-GEOS, Orbimage, Shell, ExxonMobil

2. GODAE: The vision
"A global system of observations, communications, modeling and assimilation, that will deliver regular, comprehensive information on the state of the oceans in a way that will promote and engender wide utility and availability of this resource for maximum benefit to society."

3. Objectives and Goals
A broad partnership of institutions that collaborate in developing and demonstrating the performance and application of eddy-resolving, real-time global and basin-scale ocean prediction systems using HYCOM.
Transition to operational use by the U.S. Navy at NAVOCEANO and by NOAA at NCEP.

4. Objectives and Goals
Strong participation of the coastal ocean modeling community in using and evaluating boundary conditions from the global and basin-scale ocean modeling prediction systems
Efficient data distribution (100 Terrabytes Storage Area Network)
The data are available to the community at large within 24 hours via Live Access Server (LAS), ftp, and OPeNDAP at

5. STORAGE AREA NETWORK Three 8 CPU machines 32 GB RAM/machine
100 TB Fibre Channel SAN
Three 8 CPU machines
32 GB RAM/machine
Software
Red Hat Linux
Red Hat cluster suite and Global File System
Apache Web Server
THREDDS
LAS Server
Vsftpd server
The All files are unzipped and hence 1-3 min of time saved for individual files access by eliminating the unzipping part. Makes big difference when extracting a time series.

6. Currently Available Datasets
Daily outputs from the real time Global HYCOM+NCODA analysis
Global HYCOM+NCODA analysis (2004- present)
Global non-assimilative HYCOM ( )
Near real-time 1/12 Atlantic Ocean prediction system output (June 2003 – Present)
Monthly mean 1/12 Pacific Ocean simulation output ( )

7. nowcast/forecast systems
Present
nowcast/forecast systems
1/12º global real time system (NRL)
x 3298 grid points, ~6.5 km spacing on average, ~3.5 km at pole σ2* vertical coordinate surfaces
- Monthly river runoff (986 rivers)
- NOGAPS atmospheric forcing
- Assimilation: NCODA
1/25º Gulf of Mexico real time system (NRL)
- Running since November 2006
- Assimilation: NCODA
- 5 day hindcast, 7 day forecast
NOAA/NCEP Atlantic real-time system
- Orthogonal grid (1200 x 1684 points)
- 25 vertical coordinates (18 isopycnal, 7 z-level)
- Forcing fields from 3-hour NCEP (GDAS/GFS) model
- Tides:M2, S2, N2, K1, P1, O1, K2, Q1 tidal modes
- Rivers from daily USGS data and RIVDIS climatology
- Data Assimilation (SSH, SST,T, S, profiles)
Present near real-time system, Atlantic Ocean, run since July of Only gridded full field surface observations are assimilated in this system.
Running on kraken on 28 nodes, 224 cpus. Results on the hycom consortium web page and there is a LAS server where the data can be obtained.

8. with assimilation (GLBa0.08-60.4)

9. without assimilation (GLBa0.08-05.8)

10. Overall increase in variability - largest changes occur in the western boundary currents

11. 1/12º Global HYCOM SSH and surface drifters
Smedstad et al.

12. Eddy Kinetic Energy Comparison
Surface EKE in the Gulf Stream
3000 cm2/s2
2500
2000
1500
1000
500
Observations from
Fratantoni (2001) –
Based on
surface drifters
NCOM
HYCOM
Observations based on 15m drougued drifters over the period

13. Eddy Kinetic Energy Comparison
EKE at ~700 m in the Gulf Stream
Observations from
Schmitz (1996)
NCOM
HYCOM

14. Forecast verification statistics
from .08 global HYCOM
1.0
0.9
0.8
0.7
World
Ocean
NW Arabian Sea and Gulf of Oman
Gulf Stream
Median SSH anomaly correlation
1.0
0.9
0.8
0.7
Equatorial
Pacific
Kuroshio
Gulf of Mexico
0.6 10 20 30
Forecast length (days)
4 Forecasts included in statistics

15. Product evaluation
Assessment of the outputs by comparison to independent observations
Comparison with other GODAE products (i.e. MERSEA collaboration)
Strong involvement of coastal ocean modeling groups to use and evaluate boundary conditions provided by the global and basin HYCOM real time prediction system outputs

16. (G. Halliwell, U. of Miami)
Ivan Simulation
(G. Halliwell, U. of Miami)
Blended NOGAPS wind field with HWIND
gridded vector wind fields from NOAA/HRD

17. West Florida Shelf Modeling
WFS ROMS SST and surface velocity is shown inside the dashed line and outside of this area is the North Atlantic HYCOM.
Warm water is detached from the Loop Current and transported northward as mesoscale eddies and filaments.
Barth et al. (USF)

18. Regional model for South Florida seas SoFLA-HYCOM (South Florida Hybrid Coordinate Ocean Model)
Surface temperature and velocity
Nested boundaries
Kourafalou et al. (U. of Miami)

19. Nested South Atlantic Bight Finite Element Model
UNC-SAB modeling system sequence that nests the regional-scale QUODDY implementation (middle) within the 1/12° near real-time HYCOM- GODAE model (left). The limited-area QUODDY implementation (right) includes the estuary and tidal inlets along the Georgia/South Carolina coast and extends to the shelf-break.
Blanton et al. (UNC)

20. US West Coast HYCOM with Biology Nested in 1/12° Global HYCOM Basin
Basin-wide currents and gyre systems realistically represented. Kuroshio that easily transitions between meander and straight path modes.
Boxes and lines are locations where model-data comparisons will be shown.
Kindle et al. (NRL)

22. Wetting and Drying in HYCOM
Mont
St Michel
Wetting and Drying in HYCOM

23. Wetting and Drying in HYCOM
Baraille et al. (SHOM)
0 meter
layer
thickness

24. In order to achieve these goals
Continued community involvement to ensure that the numerical codes, data assimilation, framework, etc. are state-of-the-art and to maintain credibility
Continued availability of a server for easy access to the model outputs and provision of boundary conditions
Minimum dispersion of efforts among partners and users