Tidally induced internal motion in an Arctic fjord
The internal response in a stratified, partially enclosed basin subject to semi-diurnal tidal forcing through a narrow entrance is investigated. The site is located above the critical latitude where linear internal waves of lunar semi-diurnal frequency are not permitted to propagate freely. Generati...
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ftdoajarticles:oai:doaj.org/article:83e0747e815d45568a8c43de8608c67c 2023-05-15T15:09:24+02:00 Tidally induced internal motion in an Arctic fjord E. Støylen I. Fer 2014-01-01T00:00:00Z https://doi.org/10.5194/npg-21-87-2014 https://doaj.org/article/83e0747e815d45568a8c43de8608c67c EN eng Copernicus Publications http://www.nonlin-processes-geophys.net/21/87/2014/npg-21-87-2014.pdf https://doaj.org/toc/1023-5809 https://doaj.org/toc/1607-7946 1023-5809 1607-7946 doi:10.5194/npg-21-87-2014 https://doaj.org/article/83e0747e815d45568a8c43de8608c67c Nonlinear Processes in Geophysics, Vol 21, Iss 1, Pp 87-100 (2014) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2014 ftdoajarticles https://doi.org/10.5194/npg-21-87-2014 2022-12-31T00:26:58Z The internal response in a stratified, partially enclosed basin subject to semi-diurnal tidal forcing through a narrow entrance is investigated. The site is located above the critical latitude where linear internal waves of lunar semi-diurnal frequency are not permitted to propagate freely. Generation and propagation of tidally induced internal Kelvin waves are studied, for baroclinically sub- and supercritical conditions at the mouth of the fjord, using a non-linear 3-D numerical model in an idealized basin and in Van Mijenfjorden, Svalbard, using a realistic topography. The model results are compared to observations of hydrography and currents made in August 2010. Results from both the model and measurements indicate the presence of internal Kelvin waves, even when conditions at the fjord entrance are supercritical. The entrance of Van Mijenfjorden is split into two sounds. Sensitivity experiments by closing each sound separately reveal that internal Kelvin waves are generated at both sounds. When the conditions are near supercritical, a wave pulse propagates inward from the fjord entrance at the beginning of each inflow phase of the tidal cycle. The leading crest is followed by a series of smaller amplitude waves characterized as non-linear internal solitons. However, higher model resolution is needed to accurately describe the influence of small-scale mixing and processes near the sill crest in establishing the evolution of the flow and internal response in the fjord. Article in Journal/Newspaper Arctic Svalbard Van Mijenfjorden Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Van Mijenfjorden ENVELOPE(14.667,14.667,77.717,77.717) Nonlinear Processes in Geophysics 21 1 87 100 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 E. Støylen I. Fer Tidally induced internal motion in an Arctic fjord |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The internal response in a stratified, partially enclosed basin subject to semi-diurnal tidal forcing through a narrow entrance is investigated. The site is located above the critical latitude where linear internal waves of lunar semi-diurnal frequency are not permitted to propagate freely. Generation and propagation of tidally induced internal Kelvin waves are studied, for baroclinically sub- and supercritical conditions at the mouth of the fjord, using a non-linear 3-D numerical model in an idealized basin and in Van Mijenfjorden, Svalbard, using a realistic topography. The model results are compared to observations of hydrography and currents made in August 2010. Results from both the model and measurements indicate the presence of internal Kelvin waves, even when conditions at the fjord entrance are supercritical. The entrance of Van Mijenfjorden is split into two sounds. Sensitivity experiments by closing each sound separately reveal that internal Kelvin waves are generated at both sounds. When the conditions are near supercritical, a wave pulse propagates inward from the fjord entrance at the beginning of each inflow phase of the tidal cycle. The leading crest is followed by a series of smaller amplitude waves characterized as non-linear internal solitons. However, higher model resolution is needed to accurately describe the influence of small-scale mixing and processes near the sill crest in establishing the evolution of the flow and internal response in the fjord. |
format |
Article in Journal/Newspaper |
author |
E. Støylen I. Fer |
author_facet |
E. Støylen I. Fer |
author_sort |
E. Støylen |
title |
Tidally induced internal motion in an Arctic fjord |
title_short |
Tidally induced internal motion in an Arctic fjord |
title_full |
Tidally induced internal motion in an Arctic fjord |
title_fullStr |
Tidally induced internal motion in an Arctic fjord |
title_full_unstemmed |
Tidally induced internal motion in an Arctic fjord |
title_sort |
tidally induced internal motion in an arctic fjord |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/npg-21-87-2014 https://doaj.org/article/83e0747e815d45568a8c43de8608c67c |
long_lat |
ENVELOPE(14.667,14.667,77.717,77.717) |
geographic |
Arctic Svalbard Van Mijenfjorden |
geographic_facet |
Arctic Svalbard Van Mijenfjorden |
genre |
Arctic Svalbard Van Mijenfjorden |
genre_facet |
Arctic Svalbard Van Mijenfjorden |
op_source |
Nonlinear Processes in Geophysics, Vol 21, Iss 1, Pp 87-100 (2014) |
op_relation |
http://www.nonlin-processes-geophys.net/21/87/2014/npg-21-87-2014.pdf https://doaj.org/toc/1023-5809 https://doaj.org/toc/1607-7946 1023-5809 1607-7946 doi:10.5194/npg-21-87-2014 https://doaj.org/article/83e0747e815d45568a8c43de8608c67c |
op_doi |
https://doi.org/10.5194/npg-21-87-2014 |
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Nonlinear Processes in Geophysics |
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21 |
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87 |
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100 |
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1766340599170990080 |