Eddy Resolving Global Ocean Prediction
Abstract
This is the first year of a 3-year Challenge Project that aims at providing a real-time depiction of the three-dimensional global ocean state at fine resolution (1/25 degree on the equator, 3.5 km at mid-latitudes, and 2 km in the Arctic). The prediction system will not run in real time until FY12, since this is when the first computer large enough to run it in real time is expected to be available at NAVOCEANO. A major sub-goal of this effort is to test new capabilities in the existing 1/12 degree global HYbrid Coordinate Ocean Model (HYCOM) nowcast/forecasl system and to transition some of these capabilities to NAVOCEANO in the existing 1/12 degree global system, and others in the 1/25 degree system. The new capabilities support the following: (1) increased nowcast and forecast skill, the latter out to 30 days in many deep water regions, including regions of high Navy interest, such as the Western Pacific and the Arabian Sea/Gulf of Oman; (2) boundary conditions for coastal models in very shallow water (to zero depth with wetting and drying); and (3) external and internal tides, the latter with initial testing at 1/12 degree but transitioning to NAVOCEANO in the 1/25 degree system (all these will greatly benefit from the increase to 1/25 degree resolution). At 1/25 degree, the entire first year will be spent on initial climatologically forced nonassimilative simulations that are necessary before we can start data assimilation hindcasts. At 1/12 degree, we have started exploring improved model configurations with climatologically forced runs and testing improved data assimilation with hindcast cases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2010
- Accession Number
- ADA557061
Entities
People
- Alan J. Wallcraft
- Edward Joseph Metzger
- Ole Martin Smedstad
Organizations
- United States Naval Research Laboratory