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PDAF - the Parallel Data Assimilation Framework

PDAF is developed,
hosted and maintained at the
Computing Center of the Alfred Wegener Institute.
News
April 5, 2018
Update of implementation tutorials. They now describe the new features of PDAF 1.13 and include hints on how to extend the tutorial implementations to more complex cases
March 12, 2018
Release of Version 1.13.1 (release notes)
(added routine to retrieve assimilation flag and two bug corrections)
February 11, 2018
Slides for PDAF tutorial at Ocean Sciences Meeting are now online (see Publications and Presentations)
February 6, 2018
Release of Version 1.13 (release notes)
(added model binding for MITgcm, new routines to simplify implementation of parallelized local analysis step)

The Parallel Data Assimilation Framework - PDAF - is a software environment for ensemble data assimilation. PDAF simplifies the implementation of the data assimilation system with existing numerical models. With this, users can obtain a data assimilation system with less work and can focus on applying data assimilation.

PDAF provides fully implemented and optimized data assimilation algorithms, in particular ensemble-based Kalman filters like LETKF and LSEIK. It allows users to easily test different assimilation algorithms and observations. PDAF is optimized for the application with large-scale models that usually run on big parallel computers and is applicable for operational applications. However, it is also well suited for smaller models and even toy models.

PDAF provides a standardized interface that separates the numerical model from the assimilation routines. This allows to perform the further development of the assimilation methods and the model independently. New algorithmic developments can be readily made available through the interface such that they can be immediately applied with existing implementations. The test suite of PDAF provides small models for easy testing of algorithmic developments and for teaching data assimilation.

PDAF is an open-source project. Its functionality will be further extended by input from research projects. In addition, users are welcome to contribute to the further enhancement of PDAF, e.g. by contributing additional assimilation methods or interface routines for different numerical models.

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Last modified 3 weeks ago Last modified on 04/05/18 21:39:59