scholarly journals Scattering of coastal-trapped waves by irregularities in coastline and topography

1988 ◽  
Author(s):  
John L. Wilkin
Keyword(s):  
Trapped Waves ◽  
Coastal Trapped Waves

Effect of coastal-trapped waves on the synoptic variations of the Yellow Sea Warm Current during winter

2018 ◽  
Vol 167 ◽  
pp. 14-31 ◽  
Author(s):  
Yang Ding ◽  
Xianwen Bao ◽  
Zhigang Yao ◽  
Dehai Song ◽  
Jun Song ◽  
...  
Keyword(s):  
Yellow Sea ◽  
The Yellow Sea ◽  
Trapped Waves ◽  
Yellow Sea Warm Current ◽  
Warm Current ◽  
Coastal Trapped Waves

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

Ocean Science ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 77-93 ◽  
Author(s):  
Stefanie Semper ◽  
Elin Darelius
Keyword(s):  
Dispersion Curve ◽  
Austral Summer ◽  
Tidal Energy ◽  
Tidal Currents ◽  
Shelf Break ◽  
Weddell Sea ◽  
Austral Winter ◽  
Background Current ◽  
Trapped Waves ◽  
Coastal Trapped Waves

Abstract. The summer enhancement of diurnal tidal currents at the shelf break in the southern Weddell Sea is studied using velocity measurements from 29 moorings during the period 1968 to 2014. Kinetic energy associated with diurnal tidal frequencies is largest at the shelf break and decreases rapidly with distance from it. The diurnal tidal energy increases from austral winter to summer by, on average, 50 %. The austral summer enhancement is observed in all deployments. The observations are compared to results from an idealised numerical solution of the properties of coastal trapped waves (CTWs) for a given bathymetry, stratification and an along-slope current. The frequency at which the dispersion curve for mode 1 CTWs displays a maximum (i.e. where the group velocity is zero and resonance is possible) is found within or near the diurnal frequency band, and it is sensitive to the stratification in the upper part of the water column and to the background current. The maximum of the dispersion curve is shifted towards higher frequencies, above the diurnal band, for weak stratification and a strong background current (i.e. austral winter-like conditions) and towards lower frequencies for strong upper-layer stratification and a weak background current (austral summer). The seasonal evolution of hydrography and currents in the region is inferred from available mooring data and conductivity–temperature–depth profiles. Near-resonance of diurnal tidal CTWs during austral summer can explain the observed seasonality in tidal currents.

scholarly journals Sea Level and the Role of Coastal Trapped Waves in Mediating the Influence of the Open Ocean on the Coast

2019 ◽  
Vol 40 (6) ◽  
pp. 1467-1492 ◽  
Author(s):  
Chris W. Hughes ◽  
Ichiro Fukumori ◽  
Stephen M. Griffies ◽  
John M. Huthnance ◽  
Shoshiro Minobe ◽  
...  
Keyword(s):  
Sea Level ◽  
Open Ocean ◽  
Trapped Waves ◽  
Coastal Trapped Waves

Bass Strait Forcing of Coastal Trapped Waves: ACE Revisited

1990 ◽  
Vol 20 (9) ◽  
pp. 1528-1538 ◽  
Author(s):  
R. A. Morrow ◽  
Ian S. F. Jones ◽  
R. L. Smith ◽  
P. J. Stabeno
Keyword(s):  
Trapped Waves ◽  
Coastal Trapped Waves

Currents off south-eastern Australia: results from the Australian coastal experiment

1988 ◽  
Vol 39 (3) ◽  
pp. 245 ◽  
Author(s):  
A Huyer ◽  
RL Smith ◽  
PJ Stabeno ◽  
JA Church ◽  
NJ White
Keyword(s):  
Sea Level ◽  
Continental Slope ◽  
Wind Stress ◽  
Continental Margin ◽  
Eddy Currents ◽  
Empirical Orthogonal Functions ◽  
Trapped Waves ◽  
Orthogonal Functions ◽  
Coastal Trapped Waves ◽  
And Sea Level

The Australian Coastal Experiment was conducted off the east coast of New South Wales between September 1983 and March 1984. The experiment was conducted with arrays of current meters spanning the continental margin at three latitudes (37.5�, 34.5�, and 33.0�S.), additional shelf moorings at 29� and 42�S. coastal wind and sea-level measurements, monthly conductivity-temperature-depth probe/expendable bathythermograph (CTD/XBT) surveys, and two satellite-tracked buoys. Over the continental shelf and slope, the alongshore component of the current generally exceeded the onshore component, and the subtidal (<0.6 cpd, cycles per day) current variability greatly exceeded the mean flow. Part of the current variability was associated with two separate warm-core eddies that approached the coast, causing strong (>50 cm sec-1), persistent (>8 days), southward currents over the continental slope and outer shelf. Temperature and geostrophic velocity sections through the eddies, maps of ship's drift vectors and temperature contours at 250 m, and the satellite-tracked drifter trajectories showed that these eddies were similar in structure to those observed previously in the East Australian Current region. Both eddies migrated generally southward. Eddy currents over the shelf and slope were rare at Cape Howe (37.5�S.), more common near Sydney (34.5�S.), and frequent at Newcastle (33.0�S.), where strong northward currents were also observed. Near Sydney, the eddy currents over the slope turned clockwise with depth between 280 and 740 m, suggesting net downwelling there. Repeated CTD sections also indicated onshore transport and downwelling at shallower levels; presumably, upwelling occurred farther south where the eddy currents turned offshore. Periodic rotary currents over the continental slope near Sydney and Newcastle indicated the presence of small cyclonic eddies on the flank of a much larger anticyclonic eddy. Between early October and late January, no strong southward currents were observed over the continental margin near Sydney. Data from this 'eddy-free' period were analysed further to examine the structure and variability of the coastal currents. Much of this variability was correlated with fluctuations in coastal sea-level (at zero lag) and with the wind stress (at various lags). The coherence and phase relationships among current, wind-stress, and sea-level records at different latitudes (determined from spectral analysis and frequency-domain empirical orthogonal functions) were consistent with the equatorward propagation of coastal-trapped waves generated by winds in phase with those near Cape Howe. Time-domain empirical orthogonal functions show that the current fluctuations decayed with distance from shore and with depth, as expected of coastal-trapped waves.

scholarly journals Intraseasonal variability of nearshore productivity in the Northern Humboldt Current System: The role of coastal trapped waves

2014 ◽  
Vol 73 ◽  
pp. 14-30 ◽  
Author(s):  
Vincent Echevin ◽  
Aurélie Albert ◽  
Marina Lévy ◽  
Michelle Graco ◽  
Olivier Aumont ◽  
...  
Keyword(s):  
Current System ◽  
Intraseasonal Variability ◽  
Trapped Waves ◽  
Humboldt Current ◽  
Coastal Trapped Waves ◽  
Humboldt Current System
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