U.S. GODAE: Global Ocean Prediction with Community Effort: Community Effort: NRL, U. of Miami, FSU, NASA-GISS, NOAA/NCEP, NOAA/AOML, NOAA/PMEL, PSI, FNMOC,

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U.S. GODAE: Global Ocean Prediction with

U.S. GODAE: Global Ocean Prediction with

COAPS, Florida State University

Supervisor: Eric Chassignet

Presentation transcript:

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

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. To be transitioned for operational use by the U.S. Navy at NAVOCEANO and FNMOC and by NOAA at NCEP.

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 Objectives and Goals

Roadmap Basin-scale –FY07: Evaluation of data assimilation schemes [MVOI, EnOI, SEEK and ROIF]. Improvements to the present near real time NOAA/NCEP North Atlantic configuration. Overlap in FY07 of the near real time NRL North Atlantic configuration and of the global configuration for assessment of the global system in the Atlantic. –The NOAA/NCEP Pacific configuration to become operational in FY08.

Configuration of the Basin-Scale Prediction Systems NRL NOAA/NCEP

Roadmap Global configuration –Development has been taking place since FY04. –Transition to NAVOCEANO (1/12º) with MvOI (NCODA) in FY07. –Operational testing in year FY08. –Increase to 1/25° resolution globally (~3-4 km mid-latitude) by the end of the decade

Horizontal grid: 1/12° equatorial resolution – 4500 x 3298 grid points, ~6.5 km spacing on average, ~3.5 km at pole, 5 m minimum depth Mercator 79°S to 47°N, then Arctic dipole patch 32 σ 2 * vertical coordinate surfaces: GISS mixed layer model Thermodynamic sea-ice model Surface forcing: wind stress, wind speed, thermal forcing, precipitation, weak relaxation to climatological SSS Monthly river runoff (986 rivers) Initialized from January climatology (GDEM3) T and S Global HYCOM configuration

1/12° Global HYCOM Snapshot: SSH and ice (gray) 216,000 CPU hrs/model year on 784 IBM Power 4+ CPUs 7.2 TB/model year for daily 3-D output May 2 model year 8

Free Running Global HYCOM (Metzger et al.) 1992 – 2005 SSH variability based on T/P, ERS-1, and ERS-2 altimeters (Courtesy CLS) SSH variability from 1/12° global HYCOM σ 2 * with climatological wind and thermal forcing

1/12  Global HYCOM Monthly Mean Mixed Layer Depth Evaluation (Kara et al.) HYCOM MLD – MLD based on the GDEM3 climatology Annual Mean Bias in m RMS difference in m HYCOM was forced by an ECMWF ERA15 Climatology (with 6-hrly submonthly fluctuations added )

Roadmap 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

AGENDA THIS IS AN INFORMATION EXCHANGE MEETING. DO NOT HESITATE TO PRESENT THE NUTS AND BOLTS ASPECTS OF YOUR WORK. Suggested time for the presentations is +/- 15 minutes. In addition to a discussion of your results, it would be most useful to include in your presentation a status report as well as your vision for the following year.