Articles | Volume 13, issue 1
https://doi.org/10.5194/os-13-77-2017
https://doi.org/10.5194/os-13-77-2017
Research article
 | 
30 Jan 2017
Research article |  | 30 Jan 2017

Seasonal resonance of diurnal coastal trapped waves in the southern Weddell Sea, Antarctica

Stefanie Semper and Elin Darelius

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Cited articles

Årthun, M., Nicholls, K. W., Makinson, K., Fedak, M. A., and Boehme, L.: Seasonal inflow of warm water onto the southern Weddell Sea continental shelf, Antarctica, Geophys. Res. Lett., 39, L17601, https://doi.org/10.1029/2012GL052856, 2012.
Boehme, L., Lovell, P., Biuw, M., Roquet, F., Nicholson, J., Thorpe, S. E., Meredith, M. P., and Fedak, M.: Technical Note: Animal-borne CTD-Satellite Relay Data Loggers for real-time oceanographic data collection, Ocean Sci., 5, 685–695, https://doi.org/10.5194/os-5-685-2009, 2009.
Brink, K. H.: Coastal-trapped waves and wind-driven currents over the continental shelf, Annu. Rev. Fluid Mech., 23, 389–412, https://doi.org/10.1146/annurev.fl.23.010191.002133, 1991.
Brink, K. H.: Coastal-Trapped Waves with Finite Bottom Friction, Dynam. Atmos. Oceans, 41, 172–190, https://doi.org/10.1016/j.dynatmoce.2006.05.001, 2006.
British Antarctic Survey: UK Antarctic Surface Meteorology; 1947–2013, Database, Version 1.0, Polar Data Centre, British Antarctic Survey, updated 2014, https://doi.org/10.5285/569d53fb-9b90-47a6-b3ca-26306e696706, 2013.
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Short summary
Velocity measurements from moorings at the shelf break in the southern Weddell Sea reveal strong diurnal tidal currents, which are enhanced by ca. 50 % in austral summer compared to winter. A numerical code describing coastal trapped waves (CTWs) is used to explore the effect of changing stratification and circulation on wave properties. It is found that near-resonance between CTWs and diurnal tides during austral summer can explain the observed enhancement of diurnal tidal currents.