Articles | Volume 17, issue 6
https://doi.org/10.5194/os-17-1639-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-1639-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
A tidally driven fjord-like strait close to an amphidromic region
Sissal Vágsheyg Erenbjerg
CORRESPONDING AUTHOR
Dept. of Fjord Dynamics, Fiskaaling A/S, við Áir 11, 430 Hvalvík, Faroe Islands
Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
Jon Albretsen
Institute of Marine Research, P.O. Box 1870 Nordnes, 5817, Bergen, Norway
Knud Simonsen
Dept. of Science and Technology, University of the Faroe Islands, J. C. Svabosgøta 14, 100 Tórshavn, Faroe Islands
Erna Lava Olsen
Dept. of Fjord Dynamics, Fiskaaling A/S, við Áir 11, 430 Hvalvík, Faroe Islands
Eigil Kaas
Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
National Center for Climate Research, Danish Meteorological Institute, Lyngbyvej 100, 2100 Copenhagen, Denmark
Bogi Hansen
Faroe Marine Research Institute, P.O. Box 3051, 110 Tórshavn, Faroe Islands
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Sea ice models are often implemented for very large domains beyond the regions of sea ice formation, such as the whole Arctic or all of Antarctica. In this study, we implement changes in the Los Alamos Sea Ice Model, allowing it to be implemented for relatively small regions within the Arctic or Antarctica and yet considering the presence and influence of sea ice outside the represented areas. Such regional implementations are important when spatially detailed results are required.
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Compared to other freshwater sources, runoff from Iceland is small and usually flows into the Nordic Seas. Under certain wind conditions, it can, however, flow into the Iceland Basin and this occurred after 2014, when this region had already freshened from other causes. This explains why the surface freshening in this area became so extreme. The local and shallow character of this runoff allows it to have a disproportionate effect on vertical mixing, winter convection, and biological production.
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Short summary
Here, we describe a strait that has narrow and shallow sills in both ends and is close to an amphidromic region. This generates tidally driven flows into and out of the strait, but with very different exchange rates across the entrances in both ends so that it behaves like a mixture between a strait and a fjord. Using a numerical model, we find a fortnightly signal in the net transport through the strait, generated by long-period tides. Our findings are verified by observations.
Here, we describe a strait that has narrow and shallow sills in both ends and is close to an...