A comparison of East China Sea low frequency bottom scattering strength determinations

2002 ◽  
Vol 112 (5) ◽  
pp. 2362-2362
Author(s):  
P. G. Cable ◽  
R. Gibson ◽  
Y. Dorfman ◽  
D. P. Knobles ◽  
T. W. Yudichak ◽  
...  
Keyword(s):  
East China Sea ◽  
Low Frequency ◽  
East China ◽  
China Sea ◽  
Scattering Strength

Tidal and low-frequency currents along the CK Line (31deg 45min N) over the East China Sea shelf

2012 ◽  
Vol 50-51 ◽  
pp. 41-53 ◽  
Author(s):  
Yutaka Yoshikawa ◽  
Takeshi Matsuno ◽  
Taku Wagawa ◽  
Toru Hasegawa ◽  
Kou Nishiuchi ◽  
...  
Keyword(s):  
East China Sea ◽  
Low Frequency ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
East China Sea Shelf

scholarly journals Variation and Episodes of Near-Inertial Internal Waves on the Continental Slope of the Southeastern East China Sea

2021 ◽  
Vol 9 (8) ◽  
pp. 916
Author(s):  
Bing Yang ◽  
Po Hu ◽  
Yijun Hou
Keyword(s):  
Continental Slope ◽  
East China Sea ◽  
Internal Waves ◽  
Low Frequency ◽  
Blue Shift ◽  
Vertical Shear ◽  
East China ◽  
Left Hand ◽  
China Sea ◽  
Generation Mechanisms

Based on in situ observations, six episodes of near-inertial internal waves (NIWs) were detected on the East China Sea (ECS) continental slope, and the mechanisms and characteristics of them were examined. The generation mechanisms of the observed NIWs included typhoon, wind burst, lateral propagation, and energy transfer from low-frequency flow. The depth-integrated near-inertial kinetic energy (NIKE) showed no significant seasonal variation, and the annual mean NIKE and near-inertial currents were 400 J/m2 and 3.50 cm/s, respectively. Downward propagation of NIKE was evident in the small wavenumber band according to the rotary vertical wavenumber spectra. The NIKE was subsurface-intensified, and the near-inertial vertical shear reached 0.01 s−1. The vertical phase speeds of the NIWs ranged from 5 to 19 m/h. The frequencies of the NIWs were mostly red-shifted, however, blue-shift also existed. One episode had both blue- and red-shifted frequencies vertically, and had both upward and downward propagating vertical phase speeds. The e-folding times of the observed NIWs ranged from 4 to 11 days, which were influenced by successive wind bursts and background vorticity. On the left-hand side of Kuroshio, the background vorticity is usually positive; however, the NIWs were almost red-shifted, which resulted from the Doppler shift of the Kuroshio.

scholarly journals Observational Analysis of Sudden Tropical Cyclone Track Changes in the Vicinity of the East China Sea

2011 ◽  
Vol 68 (12) ◽  
pp. 3012-3031 ◽  
Author(s):  
Liguang Wu ◽  
Huijun Zong ◽  
Jia Liang
Keyword(s):  
East China Sea ◽  
Low Frequency ◽  
Satellite Orbit ◽  
Underlying Mechanism ◽  
East China ◽  
Synoptic Scale ◽  
The East China Sea ◽  
Observational Analysis ◽  
China Sea ◽  
The Pacific

Abstract An observational analysis of observed sudden typhoon track changes is conducted with a focus on the underlying mechanism and the possible role of slowly varying low-frequency flows. Four typhoons that took a generally northwestward track prior to sharply turning northeastward in the vicinity of the East China Sea are investigated. It is found that the sudden track changes occurred near the center of the Madden–Julian oscillation (MJO)-scale cyclonic circulation or at the bifurcation point of the steering flows at 700 hPa, and they were all associated with a well-developed quasi-biweekly oscillation (QBW)-scale gyre. Calculation of vorticity advection suggests that the peripheral ridging resulting from the interaction between the typhoons and the flows on the MJO and QBW scales can compress the typhoon circulation, leading to an area of high winds to the east or south of the typhoon center. The enhanced synoptic-scale winds shifted the typhoons northward and placed them in a northeastward orbit under the steering of the flows associated with the Pacific subtropical high. The sudden track change can be likened to the maneuvering of satellite orbit change in that the enhanced synoptic-scale winds act as a booster rocket to shift the typhoons northward to the southwesterly steering flows.

The Shelf-Edge Frontal Structure in the Central East China Sea and Its Impact on Low-Frequency Acoustic Propagation

2004 ◽  
Vol 29 (4) ◽  
pp. 1011-1031 ◽  
Author(s):  
S.R. Ramp ◽  
C.-S. Chiu ◽  
F.L. Bahr ◽  
Y. Qi ◽  
P.H. Dahl ◽  
...  
Keyword(s):  
East China Sea ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
East China ◽  
Shelf Edge ◽  
China Sea ◽  
Frontal Structure

Quantifying the spatial variability of low frequency acoustic propagation in the Northern East China Sea

2016 ◽  
Vol 140 (4) ◽  
pp. 3014-3014
Author(s):  
Sungho Cho ◽  
Donhyug Kang ◽  
Byoung-Nam Kim ◽  
Seom-Kyu Jung ◽  
Jee Woong Choi
Keyword(s):  
Spatial Variability ◽  
East China Sea ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
East China ◽  
China Sea

The East China Sea Seafloor Observatory and its upgraded project

2011 ◽  
Author(s):  
Huiping Xu ◽  
Changwei Xu ◽  
Rufu Qin ◽  
Yang Yu ◽  
Shangqin Luo ◽  
...  
Keyword(s):  
East China Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Seafloor Observatory
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