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| Titel |
A comprehensive validation toolbox for regional ocean models - Outline, implementation and application to the Baltic Sea |
| VerfasserIn |
Simon Jandt, Priidik Laagemaa, Frank Janssen |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250095730
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| Publikation (Nr.) |
 EGU/EGU2014-11198.pdf |
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| Zusammenfassung |
| The systematic and objective comparison between output from a numerical ocean model and
a set of observations, called validation in the context of this presentation, is a beneficial
activity at several stages, starting from early steps in model development and ending at the
quality control of model based products delivered to customers. Even though the importance
of this kind of validation work is widely acknowledged it is often not among the most popular
tasks in ocean modelling.
In order to ease the validation work a comprehensive toolbox has been developed in the
framework of the MyOcean-2 project. The objective of this toolbox is to carry out validation
integrating different data sources, e.g. time-series at stations, vertical profiles, surface fields
or along track satellite data, with one single program call. The validation toolbox,
implemented in MATLAB, features all parts of the validation process – ranging from read-in
procedures of datasets to the graphical and numerical output of statistical metrics of the
comparison.
The basic idea is to have only one well-defined validation schedule for all applications, in
which all parts of the validation process are executed. Each part, e.g. read-in procedures,
forms a module in which all available functions of this particular part are collected. The
interface between the functions, the module and the validation schedule is highly
standardized. Functions of a module are set up for certain validation tasks, new functions can
be implemented into the appropriate module without affecting the functionality of the
toolbox. The functions are assigned for each validation task in user specific settings, which
are externally stored in so-called namelists and gather all information of the used datasets as
well as paths and metadata.
In the framework of the MyOcean-2 project the toolbox is frequently used to validate the
forecast products of the Baltic Sea Marine Forecasting Centre. Hereby the performance of
any new product version is compared with the previous version.
Although, the toolbox is mainly tested for the Baltic Sea yet, it can easily be adapted to
different datasets and parameters, regardless of the geographic region.
In this presentation the usability of the toolbox is demonstrated along with several results of
the validation process. |
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