Release notes for PDAF

Version 1.7 - September 16, 2011

Changes:

• Revised internal structure of PDAF to simplify implementation of additional assimilation methods.
• Added full data assimilation implementation of Lorenz-96 model with PDAF.
• Revision of observation localization. It also includes the regulated localization that was introduced in the paper "A regulated localization scheme for ensemble-based Kalman filters" by L. Nerger et al. to appear in Q. J. Roy. Meteor. Soc. (accessible online: DOI:10.1002/qj.945)
• Added an option to display parameter options for a selected filter using the compiled program.
• Added routines with a simplified interface. The simplified interface does not require that you provide the names of user-supplied subroutines int he call to PDAF. However, one is restricted to use pre-defined routine names.
• License change: Now PDAF is licensed with the more flexible Lesser GNU Public License (older versions of PDAF used the GNU Public License).

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Previous versions

Version 1.6.2 - 10/05/2010

Changes:

• Change in Makefiles to correct compilation on Linux with gfortran

Version 1.6.1 - 08/27/2010

Changes:

• Added pre-processor statement PDAF_NO_UPDATE to simplify tests during implementation.
• Unified interface to pre/poststep routines. For the EnKF Uinv was added. This array is never used in EnKF.
• Added shortened timer output to PDAF_print_info

Version 1.6.0 - 03/18/2010

Version distributed after presentation at Ocean Sciences Meeting, Portland, OR.

Changes:

• Added ETKF and LETKF to public release

Version 1.5.0 - 01/19/2010

Changes:

• Revised directory structure to separate PDAF core routines from test suite.

Versions 1.4.2 to 1.1.0

Version 1.0 - 10/08/2004

Original public release after participating at the GODAE International Summer School of Oceanography, „An Integrated View of Oceanography: Ocean Weather Forecasting in the 21st Century”, Lalonde les Maures, France