North Sea Dynamics

This volume contains the proceedings of the International Sym­ posium on North Sea Dynamics which was held in Hamburg, August 31 - September 4, 1981. More than 150 participants from 10 coun­ tries were present at the Symposium. Of the 58 lectures given, 45 are printed in this book. The manuscripts were reviewed by an international advisory board. The main goal of the organizers was to bring together as many active researchers as possible in this very general field of North Sea dynarnics, transcending the boundaries of the countries and the various disciplines involved, in order to discuss the main problems and future trends. In the ten years since the last comparable meeting in Aviemore, Scotland, several large interna­ tional experiments (JONSDAP '73 and '76, JONSWAP '73, '75 and '77, MARSEN '79) and new developments in modelling promised a rewarding exchange of ideas. In addition to the physical disci­ plines, biologists and geologists are increasingly able to pre­ sent quantitative analyses.

History of International North Sea Research (ICES).- History of International North Sea Research (ICES).- Currents and Water Balance.- Currents and Water Balance in the North Sea.- Application of a Three-Dimensional Shelf Model to the Calculation of North Sea Currents.- On Seasonal Circulation Patterns in the North Sea.- Three-Dimensional Galerkin-Spectral Sea Models of the North Sea and German Bight.- An Operational Numerical Model of the North Sea and the German Bight.- Seasonal Variability in the Position and Strength of the Fair Isle Current.- Experiments with Two- and Three-Dimensional Numerical Models of the North-East Coast of England.- Eulerian and Lagrangean Analysis of Velocity Fields in the Southern North Sea.- Extreme Bottom Currents in the North Sea.- Surface Currents in the German Bight Measured by Back-scattered Radio Waves ― a Comparison with Conventional Measurements and Model Results.- The Spectrum of Internal Motions in the North Sea, Inferred from Modulation of an Acoustic Underwater Signal.- A Three-Dimensional Model of Shallow-Sea Fronts.- Sea Level Forecasts with an EOF Model.- Year-To-Year Changes in the Salinity of the Southern North Sea, 1948–1973: A Budget.- Wind Waves and Storm Surges.- Shallow Water Wave Predication Model.- A Practical Method to Obtain Wave and Storm Surge Conditions for Predictions and Probabilistic Calculations.- Nonlinear Effects of Statistical Distributions of Deep Water Waves.- Prognostic Storm Surge Simulation with a Combined Meteorological/Oceanographic Model.- Provisional Experience with the Practical Use of an HN Model for Calculation of Sea Level Variations Along the Danish North Sea Coast.- Prediction of North Sea Storm Surges Using Numerical Models: Recent Developements in the U.K..- Storm Surge Predictions for the North Sea by the Quasi-Uniform Wind Pressure Field Method.- The Relationship Between Pressure Field and Surface Wind in the German Bight Area at High Wind Speeds.- Transport of Momentum, Energy and Matter.- Mixing Processes in the North Sea and Aspects of Their Modelling.- Synoptic Scale Variability in Shallow Seas with an Example from the Baltic Sea.- Interactions Between Tidal Residuals and “Synoptic” Eddies in the North Sea.- Simulation of the Thermal Stratification at the FLEX Central Station with a One-Dimensional Integral Model.- Turbulence Measurements in the Stratified Central North Sea with a Laser-Doppler Velocimeter System.- Evaluation of North Sea Hydrocasts for Modelling Purposes Summary of a Poster Presentation.- Turbulence and Sediment Transport Measurements in a North Sea Tidal Inlet (The Jade).- Sediment Transport Modelling with Applications to the North Sea.- Preliminary Observations for a Model of Sand Bank Dynamics.- The Importance of Langmuir Circulations to the Ecology of the Mixed Layer.- Ecosystems.- Sources of Variability in the North Sea Ecosystems.- Aerial Survey of the Temporal and Spatial Distribution of Phytoplankton During FLEX ‘76.- Release of Dissolved Organic Substances in the Course of Phytoplankton Blooms.- Dynamics of Carbohydrate Development in Tank Experiments with Cultures of Skeletonema costatum and Thalassiosira rotula.- Fluctuations of Dissolved Amino Acids: A Comparison of Natural and Enclosed Phytoplankton Populations in the North Sea.- Some Biotic Factors Influencing the Succession of Diatom Species During FLEX ‘76.- Simulations of Phytoplankton Dynamics and Their Interactions with Other System Components During FLEX ‘76.- Phytoplankton Spring Bloom Patches in the Skagerrak, Kattegat and Bornholm Basin.- Zooplankton Dynamics During FLEX ‘76.- Composition of Natural Surface Films in the North Sea.- The Influence of Intensity of Water Exchange Between the North Sea and Atlantic Ocean on Haddock Year Class Abundance.- Seabirds Recorded in the Fladenground Area, Northern North Sea, in April, May and June 1976.