System and method for correcting a model-derived vertical structure of ocean temperature and ocean salinity based on velocity observations
AssigneeThe Government of the United States of America, as represented by the Secretary of the Navy
InventorsGregg Arthur Jacobs, Scott R. Smith, Robert W. Helber
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Abstract
System and method for correcting the vertical structure of the ocean temperature and salinity based on velocity observations. Three relations that can be precomputed are exploited: (1) the relation between temperature and salinity throughout a water column, (2) the relation between temperature/salinity and geopotential, and (3) the relation between geopotential and velocity. The relations are stored in a form that allows efficient application through a cross-correlation matrix.
Claims12
A method for correcting a vertical structure of ocean temperature and ocean salinity based on velocity observations comprising:
- computing a historical covariance matrix of the vertical structure at each grid point using in situ temperature and in situ salinity;
- computing a vertical geopotential structure;
- including the vertical geopotential structure in the historical covariance matrix to form a historical geopotential and a T/S covariance matrix;
- computing a horizontal geopotential structure based on the geostrophic relationship and the velocity observations;
- computing temperature and salinity in the water column based on the covariance relation between the historical geopotential and the historical covariance matrix;
- and
- correcting a predicted temperature and a predicted salinity based on the horizontal geopotential structure, the historical geopotential, the historical covariance matrix, and the velocity observations.
A system for correcting a vertical structure of ocean temperature and ocean salinity based on velocity observations comprising:
- a matrix processor computing a historical covariance matrix of the vertical structure at each grid point using in situ temperature and in situ salinity;
- a geopotential processor computing a vertical geopotential structure, the geopotential processor including the vertical geopotential structure in the historical covariance matrix to form a historical geopotential and T/S covariance matrix;
- and
- a correction processor computing a horizontal geopotential structure based on the geostrophic relationship and the velocity observation, the correction processor computing temperature and salinity in the water column based on the covariance relation between the historical geopotential and historical covariance matrix, the correction processor correcting a predicted temperature and a predicted salinity based on the horizontal geopotential structure, the historical geopotential, the historical covariance matrix, and the velocity observations.
A computer system for correcting a vertical structure of ocean temperature and ocean salinity based on velocity observations comprising computer instructions stored on non-transitory computer readable media to:
- compute a historical covariance matrix of the vertical structure at each grid point using in situ temperature and in situ salinity;
- compute a vertical geopotential structure;
- include the vertical geopotential structure in the historical covariance matrix to form a historical geopotential and T/S covariance matrix;
- computing a horizontal geopotential structure based on the geostrophic relationship and the velocity observation;
- compute temperature and salinity in the water column based on the covariance relation between the historical geopotential and historical covariance matrix;
- and
- correct a predicted temperature and a predicted salinity based on the horizontal structure, the historical geopotential, the historical covariance matrix, and the velocity observations.
Dependencies are inferred from the claim text.