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      Scalable sequential data assimilation with the Parallel Data Assimilation Framework PDAF

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      General Information:

      Citation:
      Nerger, L. , Hiller, W. and Schröter, J. (2010): Scalable sequential data assimilation with the Parallel Data Assimilation Framework PDAF , 2010 Ocean Sciences Meeting, Portland, Oregon, February 20-26 .
      Cite this page as:
      hdl:10013/epic.34332
      Contact Email:
      Lars.Nerger@awi.de
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      Cite this document as:
      hdl:10013/epic.34332.d001
      Abstract:

      Data assimilation applications with high-dimensional numerical modelsshow extreme requirements on computational resources. Thus, goodscalability of the assimilation system is necessary to make theseapplications feasible. Sequential data assimilation methods based onensemble forecasts, like ensemble-based Kalman filters, provide suchgood scalability, because the forecast of each ensemble member can beperformed independently. However, this parallelism has to be combinedwith the parallelization of both the numerical model and the data assimilation algorithm. In order to simplify the implementation ofscalable data assimilation systems based on existing numerical models,the Parallel Data Assimilation Framework PDAF has been developed. Itprovides support for parallel ensemble forecasts and parallelnumerical models. Further, it includes several optimized parallel filteralgorithms, like the ensemble transform Kalman filter. We will discussthe features and scalability of data assimilation systems based onPDAF on the example of data assimilation with the finite element oceanmodel FEOM.

      Further Details:

      Item Type:
      Conference
      Authors:
      Nerger, Lars ; Hiller, Wolfgang ; Schröter, Jens
      Divisions:
      AWI Organizations > Climate Sciences > Climate Dynamics
      AWI Organizations > Infrastructure > Scientific Computing
      Programs:
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 4: Synthesis: The Earth System from a Polar Perspective
      Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 4: Synthesis: The Earth System from a Polar Perspective > WP 4.1: Current and Future Changes of the Earth System
      Eprint ID:
      21976
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      Alfred-Wegener-Institut
      Helmholtz-Zentrum für Polar-
      und Meeresforschung
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