Sea-level oscillations with 6-h period in the North Sea 29?31 October 2000. An analysis of data from stations in the northern North Sea and along the western coast of Norway

Abstract

During the storm event 29-31 October 2000 long regular trains of residual sea-level oscillations with period about 6 h occurred in the North Sea area. Crestto-trough heights up to 0.8 m were observed along the western coast of Norway. Model simulations show that these oscillations were mainly due to spatial and temporal variations in the atmospheric forcing and were not the result of nonlinear tide-surge interaction. The oscillations propagated northwards along the Norwegian coast and the signal was amplified in some fjords in agreement with predictions by high-resolution regional models. In Skagerrak in the north eastern North Sea the main storm-surge signal appeared as amplitudemodulated oscillations with period about 12 h and crestto-trough height up to 1.5 m. Here the tide-surge interaction contributed up to about 20% of the peak surge. On the coast of Scotland and in the southern part of the North Sea nonlinear effects produced oscillations with 6-h period at some stations.

A review of the tidal current energy resource in Norway

“…The modelled volume flux through the strait of Drøbaksundet in Oslo indicated that the velocity could have been 5 m/s. Other similar effects were reported in [54], where the amplitude of a sea level oscillation was 0.8 m along the west coast of Norway, triggered by spatial and temporal variations in the atmospheric forcing during a storm event.…”

“…For completeness it should be mentioned that Gjevik and his co-workers also modelled tidal flow and/or effects, sometimes in combination with weather changes, in the Oslo Fjord [53], the Barents Sea [68], and the North Sea [54]. It appears the models used for these papers were earlier versions of the model described above.…”

“…This work has been aimed mainly towards such uses as understanding the implications of underwater currents for transport of biological and chemical tracers (cod eggs, etc.) [64] and the prediction of surface currents and depth variations for the benefit of shipping [54,63]. Relatively little published work has been concerned with tidal energy assessments or related issues.…”

Klaipėdos Jūros Lygio Stebėjimo Stoties Duomenų Perdava Beveik Realiuoju Laiku

“…Dabar tinkle veikia apie 200 vandens lygio stebėjimo stočių, matuojančių jūros lygio pokyčius arba teikiančių susijusią informaciją iš kitų šaltinių -altimetrinių ir GPS palydovų, absoliučiojo sunkio pagreičio matavimo punktų, meteorologinių daviklių ir pan. Tokie kompleksiniai stebėjimai svarbūs hidrologijoje, meteorologijoje, navigacijoje, jūrų geodezijoje ir kitose mokslo bei praktinės veiklos srityse [10][11][12][13][14][15][16]. #!/usr/bin/perl use POSIX qw(setsid); system "stty -F /dev/ttyS0 parenb cs7 9600"; system "echo \"r\" > /dev/ttyS0"; open (COM1,"</dev/ttyS0");…”