title: Barotropic response of the Baltic Sea dynamic system to sea level fluctuations in the Kattegat strait
metadata.name: dc.contributor.author
metadata.value: Zakharchuk, Evgeniy A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Sukhachev, Vladimir N.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Tikhonova, Natalya A.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2024-02-06T13:39:48Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2024-02-06T13:39:48Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2023-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Zakharchuk, E. A., Sukhachev, V. N., Tikhonova, N. A. (2023). Barotropic response of the Baltic Sea dynamic system to sea level fluctuations in the Kattegat strait. Vestnik of Saint Petersburg University. Earth Sciences, 68 (3), 528–552. https://doi.org/10.21638/spbu07.2023.306 (In Russian)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2023.306
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/44837
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: With the help of numerical experiments with a three-dimensional barotropic hydrodynamic
  model, the response of the level surface of the Baltic Sea to different-scale level disturbances
  propagating into the Baltic through the Danish straits from the North Sea is studied. For this,
  53 harmonic oscillations with amplitudes of 10 cm and periods from 3 hours to 1 year, which
  in the article are called “external”, in contrast to the perturbations of the level inside the sea induced
  by them. The same amplitudes for all initial oscillations were set so that when analyzing
  the results, quantitative differences in the amplitude spectra of “external” and “internal” oscillations
  were clearly visible. It is shown that, with the exception of the frequency range of natural
  barotropic oscillations of the Baltic Sea, in the Danish Straits there is an almost complete
  filtration of oscillations specified at the boundary of the region with periods from 3 hours
  to 10 days. In the range of periods from 15 to 35 hours, there is an increase in “internal”
  oscillations due to the resonance of the initial oscillations with the natural oscillations of the
  Baltic. In the mesoscale frequency range (periods from hours to several days), the response of
  the level surface of the Baltic Sea to the impact of “external” oscillations is manifested in the
  generation of progressive-standing Kelvin waves with pronounced amphidromic systems and
  antinodes. For oscillations with periods of more than 10 days, with a decrease in frequency,
  the filtering effect of the Danish Straits is weakened and for periods of about 60 days, their
  amplitudes decrease by only 50 %. In the range of seasonal variability, hydraulic resistance in
  the Danish Straits has the least effect on the propagation of “external” sea level fluctuations,
  reducing their amplitudes by only 6–22 %. The highest amplitude is observed in semi-annual
  oscillations, which are amplified due to the influence of the semi-annual overtone in the annual
  oscillation generated by nonlinear effects.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The study was effectuated thanks to the Russian Science Foundation 22-27-00209
  Grant “Spatial structure and mechanisms of interannual variability of seasonal fluctuations in the Baltic Sea
  level”.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 68; Issue 3
metadata.lang: -
metadata.name: dc.subject
metadata.value: Numerical hydrodynamic modeling
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Baltic Sea
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: barotropic sea level fluctuations
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Fourier analysis
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: natural oscillations
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: amphidromic systems
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: progressive standing waves
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: annual oscillation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: semi-annual overtone
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Barotropic response of the Baltic Sea dynamic system to sea level fluctuations in the Kattegat strait
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 06.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/44837/1/06.pdf
resources.format: Adobe PDF
resources.size: 7,75 MB