SABER

SABER is the System Agnostic Background Error Representation.

It provides generic software utilities for computing and working with the background error covariance matrix, often referred to as the B matrix.

As the acronym is meant to suggest, SABER covariances are generally generic and can be used with – little modification – most earth-system models (for which a jedi-model interface exists).

• Introduction to SABER Error Covariance Model
  • Theoretical background
  • Parametric (Static) B
  • Ensemble B
  • Hybrid B
  • Geometries used in SABER covariances
  • SABER and 4DEnVar covariances
• SABER Blocks
  • Central vs Outer SABER Blocks
  • Generic blocks
  • Interpolation blocks
  • BUMP blocks
  • Spectral blocks
  • Diffusion blocks
  • ML Balance Operator
  • GSI blocks
  • UK Met Office specific blocks
  • Interfaces
• SABER Blockchain Guide
• SABER applications
  • The ErrorCovarianceToolbox Application
  • The ProcessPerts Application
• Calibration of a SABER error covariance model
  • Direct calibration
  • Iterative calibration
  • I/O methods
• SABER testing
  • QUENCH
  • SABER block testing

Final Notes:

As an additional debugging tool, TotalView is available for BUMP when SABER/JEDI is built in debug mode. TotalView is a powerful parallel debugger for C/C++, Fortran, and mixed C/C++ and python codes.

A low-level description of the classes, functions, and subroutines is also available, produced by means of the Doxygen document generator.

Doxygen Documentation