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Abstract

This study is made in the frame of a collaboration contract between the Joint Research Centre and the University of Hamburg. It concerns the North Sea, one of the most important shelf seas in Europe. The North Sea is a semi-enclosed basin within the north-west European shelf sea. The shallow shelf sea part reacts to atmospheric disturbances almost instantaneously compared to deep oceans in which a reaction occurs with a time lag of decades. The Hamburg Shelf Ocean Model (HAMSOM) was developed for application in the North Sea and is now widely used in many applications on shelf sea areas. ISPRAMIX is a 3-D circulation model developed at the Joint Research Centre of the European Commission for combined shelf and deep areas, with the aim of producing a powerful numerical tool that can simulate the ocean circulation directly and also permits the assimilation of satellite data.

In order to focus on the seasonal cycle, the results presented here are for one single year (1989) from the 16-year period investigated. Comparison of the plots of daily averages of temperature and salinity shows that the two models reproduce the same general circulation for the North Sea, although there are slight discrepancies in some temperature stratifications, particularly in the summer. Because it is under the influence of two climatic regimes, the North Sea is characterised by a very high variability, which is well represented by both models.

Additional information

Authors: OUBERDOUS M, University of Hamburg (DE);POHLMANN T, University of Hamburg (DE);STIPS A, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Inland and Marine Waters Unit, Ispra (IT);SCHRIMPF W, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Inland and Marine Waters Unit, Ispra (IT)
Bibliographic Reference: EUR 20262 EN (2002), pp.69. Euro: Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9843 or +39 033278 9864 Fax: +39 033278 9623 E-mail: jrc-publications-office@ec.europa.eu
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