Ocean Prediction with the Hybrid Coordinate Ocean Model (HYCOM)
Abstract
This chapter provides an overview of the effort centered on the HYbrid Coordinate Ocean Model (HYCOM) to develop an eddy-resolving, real-time global and basin-scale ocean prediction system in the context of the Global Ocean Data Assimilation Experiment (GODAE). The long-term goal is an eddy-resolving, fully global ocean prediction system with data assimilation based on HYCOM to be transitioned to the Naval Oceanographic Office at 1/12 degree equatorial resolution in 2007 and 1/25 degree resolution by 2011. This chapter summarizes the present status of the HYCOM effort and illustrates its capabilities. The present systems are a first step towards the fully global 1/12 degree HYCOM prediction system. The size of the problem makes it very difficult to use sophisticated assimilation techniques. Some of these methods can increase the cost of running the model by a factor of 100. It is, however, important to evaluate the performance of these advanced data assimilation techniques. Several additional techniques for assimilating data into HYCOM are already in place or are in the process of being implemented. These techniques vary in sophistication and computational requirements and include the following: NRL Coupled Ocean Data Assimilation (NCODA), Singular Evolutive Extended Kalman (SEEK) filter, Reduced Order Information Filter (ROIF), Ensemble Kalman Filter (EnKF), Reduced Order Adaptive Filter (ROAF) (including adjoint), and the 4D-VAR Representer method.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2006
- Accession Number
- ADA449144
Entities
People
- Alan J. Wallcraft
- Eric Chassignet
- George R. Halliwell
- Harley E. Hurlburt
- Ole Martin Smedstad
- Patrick J. Hogan
- Rainer Bleck
Organizations
- United States Naval Research Laboratory