Observation of continental shelf wave propagating along the eastern Taiwan Strait during Typhoon Meranti 2016

2020 ◽  
Author(s):  
Junqiang Shen ◽  
Shanwu Zhang ◽  
Junpeng Zhang ◽  
Mingzhang Zeng ◽  
Wendong Fang
Keyword(s):  
Continental Shelf ◽  
Taiwan Strait ◽  
Shelf Wave

scholarly journals Observation of a Fast Continental Shelf Wave Generated by a Storm Impacting Newfoundland Using Wavelet and Cross-Wavelet Analyses

2010 ◽  
Vol 40 (2) ◽  
pp. 417-428 ◽  
Author(s):  
Severin Thiebaut ◽  
Ross Vennell
Keyword(s):  
Continental Shelf ◽  
Sea Level ◽  
Atlantic Coast ◽  
Power Spectra ◽  
Phase Speed ◽  
High Amplitude ◽  
Passage Time ◽  
Period Range ◽  
Shelf Wave ◽  
Cross Wavelet

Abstract Wavelet and cross-wavelet power spectra of sea level records from tide gauges along the Atlantic coast of Canada showed a low-frequency barotropic response after Hurricane Florence crossed the Newfoundland shelf in September 2006. In comparison with two other storms, the results showed that Florence was the only one that excited a propagating sea level disturbance with a period range similar to the passage time of the storm over the shelf (26–30 h) and phase shifts consistent with a barotropic continental shelf wave (CSW). The high amplitude of the oscillations generated by Florence along the shore diminished from approximately 45 to 12 cm as the CSW propagated from the south coast of Newfoundland to the southern Nova Scotia seaboard. This paper presents the first direct measurement of a remarkably high alongshore group speed (11.4 ± 5.9 m s−1), in the manner of free-barotropic CSW, by examination of sea level wavelet power spectra at different locations. Furthermore, using cross-wavelet analysis of pairs of stations, an exceptional phase speed of 16.0 ± 5.1 m s−1 has been found, greater than had been previously observed for a free CSW. The results were consistent with dispersion curves for the first-mode barotropic CSW.

scholarly journals The Asymmetric Continental Shelf Wave in Response to the Synoptic Wind Burst in a Semienclosed Double-Shelf Basin

2018 ◽  
Vol 123 (1) ◽  
pp. 131-148 ◽  
Author(s):  
Lixin Qu ◽  
Xiaopei Lin ◽  
Robert D. Hetland ◽  
Jingsong Guo
Keyword(s):  
Continental Shelf ◽  
Synoptic Wind ◽  
Shelf Wave

An overview of the Brazilian continental shelf wave energy potential

2017 ◽  
Author(s):  
Ricardo Cardoso Guimarães ◽  
Phelype Haron Oleinik ◽  
Eduardo De Paula Kirinus ◽  
Wiliam Correa Marques ◽  
Bruno Vasconcellos Lopes
Keyword(s):  
Continental Shelf ◽  
Wave Energy ◽  
Energy Potential ◽  
Shelf Wave

An overview of the Brazilian continental shelf wave energy potential

2019 ◽  
Vol 25 ◽  
pp. 100446 ◽  
Author(s):  
Ricardo Cardoso Guimarães ◽  
Phelype Haron Oleinik ◽  
Eduardo de Paula Kirinus ◽  
Bruno Vasconcellos Lopes ◽  
Thaísa Beloti Trombetta ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Wave Energy ◽  
Energy Potential ◽  
Shelf Wave

scholarly journals Water Exchange across Isobaths over the Continental Shelf of the East China Sea

2017 ◽  
Vol 47 (5) ◽  
pp. 1043-1060 ◽  
Author(s):  
Jing Zhang ◽  
Xinyu Guo ◽  
Liang Zhao ◽  
Yasumasa Miyazawa ◽  
Qun Sun
Keyword(s):  
Continental Shelf ◽  
East China Sea ◽  
Water Exchange ◽  
Bottom Layer ◽  
Taiwan Strait ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
The Taiwan Strait ◽  
The Kuroshio

AbstractOnshore and offshore currents and the associated volume transport across three isobaths (50, 100, and 200 m) over the continental shelf of the East China Sea were examined using daily reanalysis data in 1993–2012. After being averaged along the isobaths, the velocities across 100 and 50 m are onshore in the bottom layer but offshore in the surface layer. In contrast, those across the 200-m isobath are onshore in the surface and bottom layers but without a clear direction in the midlayer, suggesting a three-layer structure. The surface offshore current across the 100-m isobath mainly arises from the Taiwan Strait Current, while the surface onshore current across the 200-m isobath mainly arises from the Kuroshio, both of which converge in the area between the 100- and 200-m isobaths and flow toward the Tsushima Strait. The control of bottom Ekman dynamics on the onshore bottom currents is important at the 100-m isobath, partly important at the 200-m isobath, and slightly important at the 50-m isobath. The seasonal variations of onshore and offshore currents in the surface layers across the three isobaths are likely caused by local winds, the Taiwan Strait Current, and the Changjiang discharge, while those in midlayer across the 200-m isobath demonstrate a strong geostrophic control and can be interpreted from a traditional viewpoint on the Kuroshio intrusion over the entire water column across the shelf slope. The close connection of bottom onshore currents across the three isobaths suggests that the bottom layer is an important pathway for water exchange of shelf water and the open sea.

scholarly journals The stability of continental shelf waves I. Side band instability and long wave resonance

1977 ◽  
Vol 20 (1) ◽  
pp. 13-30 ◽  
Author(s):  
R. Grimshaw
Keyword(s):  
Continental Shelf ◽  
Stability Criterion ◽  
Wave Speed ◽  
Side Band ◽  
Long Wave ◽  
Wave Resonance ◽  
Shelf Wave ◽  
Shelf Waves ◽  
The Stability ◽  
Continental Shelf Waves

AbstractContinental shelf waves are examined for side band instability. It is shown that a modulated shelf wave is described by a nonlinear Schrödinger equation, from which the stability criterion is derived. Long shelf waves are stable to side band modulations, but as the wavenumber is increased there are regions of instability (in wavenumber space). A change of stability occurs at each long wave resonance, defined by the condition that the group velocity of the shelf wave equals a long wave speed. Equations describing the long wave resonance are derived.

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