scholarly journals Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea

2022 ◽  
Vol 10 (1) ◽  
pp. 104
Author(s):  
Bing Yang ◽  
Po Hu ◽  
Yijun Hou
Keyword(s):  
Continental Slope ◽  
East China Sea ◽  
Kuroshio Current ◽  
Internal Tides ◽  
East China ◽  
Altimeter Data ◽  
China Sea ◽  
Second Mode ◽  
Variance Contribution ◽  
The Kuroshio

The semidiurnal internal tides (ITs) on the continental slope of the southeastern East China Sea (ECS) exhibited abrupt enhancement in November of 2017. This enhancement resulted from the intensification of the coherent semidiurnal ITs. Coherent and incoherent semidiurnal ITs had a comparative energy contribution in October; however, coherent semidiurnal ITs dominated with a variance contribution of 90% in November. The variance contribution of vertical modes of the semidiurnal ITs varied between October and November, and the mode with most variance contribution changed from the second mode to the first mode. Altimeter data and the observed background currents indicated that the Kuroshio mainstream meandered and abruptly intruded into the ECS in November. The upper layer background currents were significantly related to the kinetic energy of the semidiurnal ITs, and the correlation coefficient between them reached 0.81. The frequent occurrences of the Kuroshio intrusion have suggested that the ITs in the ECS are susceptible to the modulation of the Kuroshio current. Numerical modeling and predication of ITs should consider the meander of the Kuroshio mainstream.

scholarly journals Second-mode internal tides in the East China Sea deduced from historical hydrocasts and a model

2006 ◽  
Vol 33 (5) ◽  
Author(s):  
Jae-Hun Park ◽  
Magdalena Andres ◽  
Paul J. Martin ◽  
Mark Wimbush ◽  
D. Randolph Watts
Keyword(s):  
East China Sea ◽  
Internal Tides ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Second Mode

Collection of spawning-condition eels of Ariosoma meeki in the Kuroshio Current in the East China Sea

2016 ◽  
Vol 96 (8) ◽  
pp. 1701-1707 ◽  
Author(s):  
Shun Watanabe ◽  
Seishi Hagihara ◽  
Michael J. Miller ◽  
Masamichi Machida ◽  
Kosei Komatsu ◽  
...  
Keyword(s):  
Continental Shelf ◽  
East China Sea ◽  
Seminal Fluid ◽  
Kuroshio Current ◽  
East China ◽  
The East China Sea ◽  
Reproductive Condition ◽  
China Sea ◽  
Gonad Somatic Index ◽  
The Kuroshio

When and where marine eels spawn is poorly known even though species such as those of the family Congridae, Muraenidae and Ophichthidae can be caught in continental shelf habitats. The congrid genus Ariosoma includes small continental shelf eel species whose life histories are not yet known. Mature male and female eels of Ariosoma meeki were observed and captured on 17 August 2009 at the surface at night in the western side of the Kuroshio Current in the East China Sea close to new moon, while they were swimming slowly at the surface and exhibiting apparent reproduction-related behaviour. One male and one sex-unidentified eel (seemingly a male based on body shape) were observed to be chasing one larger female with their heads located near her urogenital pore area. The gonads of the female (540 mm) and the male (410 mm) that were caught by a long-handled dip net were in reproductive condition, because some eggs or seminal fluid were released during handling of the two specimens and high gonad-somatic index (GSI) values of 53 in the female and 20 in the male were recorded. This is one of the few cases in which fully ripe reproductive-condition marine eels have been observed or collected and it provides rare information about the spawning location and timing of this eel species.

scholarly journals Distribution of leptocephali in the Kuroshio Current and East China Sea

2002 ◽  
Vol 235 ◽  
pp. 279-288 ◽  
Author(s):  
MJ Miller ◽  
T Otake ◽  
G Minagawa ◽  
T Inagaki ◽  
K Tsukamoto
Keyword(s):  
East China Sea ◽  
Kuroshio Current ◽  
East China ◽  
China Sea ◽  
The Kuroshio
Sign in / Sign up

Export Citation Format

Share Document