Some Computations of Water Heights and Currents in the Baltic

Svansson, Artur

doi:10.1111/j.2153-3490.1959.tb00024.x

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…The rapid postwar development of the digital computer, as well as the catastrophic North Sea floods in 1953, provided a great impetus for this branch of research, and in the late 1950s, two important studies of the Baltic were conducted. Svanssson [1959] presented the first time-dependent simulations of this almost landlocked sea, and Lisitzin [1959] undertook a detailed study of 17 instances when regular sea level oscillations (encompassing at least four distinctly recorded periods) had been observed at Hamina in the Gulf of Finland. She determined the associated periods, finding that they tended to be fairly constant at around 26.4 h and furthermore undertook a systematic discussion of the possible effects of the Coriolis force on the oscillations of the Gulf of Finland.…”

Section: Introductionmentioning

confidence: 99%

Standing waves in the Gulf of Finland and their relationship to the basin‐wide Baltic seiches

et al. 2008

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[1] A linear shallow water model was used to study different harmonic oscillations in the Baltic Sea. The model was initialized using a linear sea surface slope from east to west and was hereafter run without forcing. In our results we could identify three different local oscillatory modes: one in the Gulf of Finland with the two distinct periods 23 and 27 h, one in the Danish Belt Sea with a less distinct period in the range 23-27 h, and one in the Gulf of Riga with the period 17 h. The most pronounced mode is that in the Gulf of Finland. No clear indications of basin-wide seiches in the Baltic could be found from our simulations. These results were further corroborated by a frequency analysis of sea level observations from the Baltic. This shows an amplification of the K 1 and O 1 tidal modes in the Gulf of Finland but not of the M 2 and S 2 modes. No such amplification was seen in the rest of the Baltic Sea. On the basis of our model simulations we propose that the sea level oscillations of the Baltic be regarded as an ensemble of weakly coupled local oscillations. Each oscillator corresponds to a ''gulf mode'' or ''harbor mode'' in a particular bay or subbasin. These are not proper eigenmodes since their energy gradually leaks out to the rest of the Baltic Sea, resulting in radiation damping. Nevertheless, their resonance may in fact be sharper than that of the proper basin-wide eigenmodes.

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Section: Introductionmentioning

confidence: 99%

Standing waves in the Gulf of Finland and their relationship to the basin‐wide Baltic seiches

et al. 2008

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“…In order to estimate the current regime of the Norwegian coastal current in Skagerrak, various methods have been tried. and Rodhe (1977) obtained direct current measurements from an anchored ship, Tomzcak (1968) employed self-recording current meters, Kobe (1934), Svansson and Lybeck (1962), Tomzcak (1968) and Dahl (1977) have calculated the geostrophical current velocity based on hydrographic observations. The direct current measurements carried out by Helland-Hansen and Tomzcak showed great variations both in directtion and magnitude.…”

Section: Introduction Previous Investigationsmentioning

confidence: 99%

On the existence of a deep countercurrent to the Norwegian coastal current in Skagerrak

Dahl¹

1978

Tellus

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Current measurements indicate that there is a semi‐permanent countercurrent below the Norwegian coastal current in Skagerrak. Comparison with local windstress, earlier findings from laboratory experiments and model simulations indicates that the Coriolis force, horizontal pressure gradients and vertical entrainment by the surface current may be the driving forces of this countercurrent, while the windstress is a modifying factor.

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“…In order to estimate the current regime of the Norwegian coastal current in Skagerrak, various methods have been tried. Helland-Hansen (1 907) and Rodhe (1977) obtained direct current measurements from an anchored ship, Tomzcak (1968) employed self-recording current meters, Kobe (1934), Svansson and Lybeck (1962), Tomzcak (1968) and Dahl (1977) have calculated the geostrophical current velocity based on hydrographic observations. The direct current measurements carried out by Helland-Hansen and Tomzcak showed great variations both in directtion and magnitude.…”

Section: Introduction Previous Investigationsmentioning

confidence: 99%

On the existence of a deep countercurrent to the Norwegian coastal current in Skagerrak

Dahl

1978

Tellus A: Dynamic Meteorology and Oceanography

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Current measurements indicate that there is a semi-permanent countercurrent below the Norwegian coastal current in Skagerrak. Comparison with local windstress, earlier findings from laboratory experiments and model simulations indicates that the Coriolis force, horizontal pressure gradients and vertical entrainment by the surface current may be the driving forces of this countercurrent, while the windstress is a modifying factor.

show abstract

Some Computations of Water Heights and Currents in the Baltic

Cited by 7 publications

References 2 publications

Standing waves in the Gulf of Finland and their relationship to the basin‐wide Baltic seiches

Standing waves in the Gulf of Finland and their relationship to the basin‐wide Baltic seiches

On the existence of a deep countercurrent to the Norwegian coastal current in Skagerrak

On the existence of a deep countercurrent to the Norwegian coastal current in Skagerrak

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