The Role of HF Radar within Operational Forecasting Systems of the Ocean
Presented at the IGARSS 2002 Conference
Klaus-Werner Gurgel ,
H.-H. ESSEN and
University of Hamburg, Institute of Oceanography,
Tropolwitzstrasse 7, D-22529 Hamburg, Germany.
Tel: +49-40-42838-5742, Fax: +49-40-42838-5713,
A full paper has been published in the conference
Operational forecasting of current and wave fields in coastal regions
got more and more important in the last decades, both for coastal management
and for security aspects. One of the key tools in this context are
high-resolution numerical models, which however require accurate forcing
and handling of the boundary conditions to give results which are close
to nature. HF radar remotely sensed current and wave fields can significantly
increase the data quality of the models, if these on-line measurements are
assimilated. In some cases, when the oceanographic processes induce
high local variability, such as mesoscale eddies and fronts, this approach
might be the only way to get reliable now- and forecasts.
In Europe, the European Radar Ocean Sensing (EuroROSE) project has demonstrated
the feasibility and performance of an HF radar based ocean monitoring system
in support of safe navigation in port approach areas and otherwise densely
operated sea areas. Two demonstrations were carried out off the Norwegian coast
north of Bergen, and at the North Spanish coast near Gijon. During each of
these demonstrations, WERA (Wellen Radar) HF radars of the University of
Hamburg were deployed. WERA measured surface currents within an area of
about 40~km by 40~km with a spatial resolution of about 1~km and with a
temporal sampling of 10~minutes. Ocean wave fields have been processed by
the University of Sheffield's wave alogorithm.
This paper presents the design of the integrated measurement/model system
which has been used within EuroROSE, as well as the result of a performance
assessment. In addition, a vision on HF radar networks to cover basin-wide
scales is developed and problems like allocation of frequency bands and
techniques of sharing frequencies by simultaneous operation of multible
HF radars are discussed.
This work has been partly funded by the European Commision DG XII within the
MAST-3 programme, project EuroROSE, CT98-0168.
last update 21-MAR-2002