Multi-Scale Three- Dimensional Variational Data Assimilation System for Coastal Ocean Prediction

A multi-scale three-dimensional variational data assimilation system (MS-3DVAR) has been formulated and the associated software system has been developed for improving high-resolution coastal ocean prediction. This system helps improve coastal ocean prediction skill, and has been used in support of operational coastal ocean forecasting systems and field experiments. The system has been developed to improve the capability of data assimilation for assimilating, simultaneously and effectively, sparse vertical profiles and high-resolution remote sensing surface measurements into coastal ocean models, as well as constraining model biases.

In this system, the cost function is decomposed into two separate units for the large- and small-scale components, respectively. As such, data assimilation is implemented sequentially from large to small scales, the background error covariance is constructed to be scaledependent, and a scale-dependent dynamic balance is incorporated. This scheme then allows effective constraining large scales and model bias through assimilating sparse vertical profiles, and small scales through assimilating high-resolution surface measurements.

This MS-3DVAR enhances the capability of the traditional 3DVAR for assimilating highly heterogeneously distributed observations, such as along-track satellite altimetry data, and particularly maximizing the extraction of information from limited numbers of vertical profile observations.

This work was done by Zhijin Li, Yi Chao, and P. Peggy Li of Caltech for NASA’s Jet Propulsion Laboratory. For more information, contact This email address is being protected from spambots. You need JavaScript enabled to view it..

This software is available for commercial licensing. Please contact Daniel Broderick of the California Institute of Technology at This email address is being protected from spambots. You need JavaScript enabled to view it.. NPO-47768

White Papers

Remediation and Prevention of Moisture in Electronics
Sponsored by multisorb technologies
How Paper-based 3D Printing Works: The Technology and Advantages
Sponsored by Mcor Technologies
Windows CE Development for RISC Computers Made Easy
Sponsored by Sealevel
White Paper: Computer System Design for Critical Applications
Sponsored by Sealevel
Piezo Engineering Tutorial
Sponsored by aerotech
Piezo Motors Power MRI Robot
Sponsored by micromo

White Papers Sponsored By: