scholarly journals A Study on Bottom Friction Coefficient in the Bohai, Yellow, and East China Sea

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Daosheng Wang ◽  
Qiang Liu ◽  
Xianqing Lv
Keyword(s):  
Friction Coefficient ◽  
Data Assimilation ◽  
East China Sea ◽  
Bottom Friction ◽  
East China ◽  
Altimeter Data ◽  
Empirical Formulas ◽  
China Sea ◽  
Dependent Form ◽  
Spatially Varying

The adjoint tidal model based on the theory of inverse problem has been applied to investigate the effect of bottom friction coefficient (BFC) on the tidal simulation. Using different schemes of BFC containing the constant, different constant in different subdomain, depth-dependent form, and spatial distribution obtained from data assimilation, the M2constituent in the Bohai, Yellow, and East China Sea (BYECS) is simulated by assimilating TOPEX/Poseidon altimeter data, respectively. The simulated result with spatially varying BFC obtained from data assimilation is better than others. Results and analysis of BFC in BYECS indicate that spatially varying BFC obtained from data assimilation is the best fitted one; meanwhile it could improve the accuracy in the simulation of M2constituent. Through the analysis of the best fitted one, new empirical formulas of BFC in BYECS are developed with which the commendable simulated results of M2constituent in BYECS are obtained.

Impacts of Binary-interacted Typhoons Tembin and Bolaven in 2012 on Surges and Waves over the East China Sea

2020 ◽  
Author(s):  
Jie Yang ◽  
Yong Li ◽  
Meixiang Chen
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
East China Sea ◽  
Coastal Hazards ◽  
The Yellow Sea ◽  
East China ◽  
Altimeter Data ◽  
The East China Sea ◽  
China Sea ◽  
Hurricane Wind

<p>Typhoon-induced storm surges and waves are highly related with typhoon track and associated wind stresses and atmospheric pressures at sea surface. The effects of binary interaction may alter typhoon tracks and even forward speed, which might influence waves and surge heights in the ocean. In the present study, we execute a series of numerical experiments to investigate how isolated and binary typhoons would impact the ocean waves and generated surges offshore and nearshore. The responses of binary typhoons to sea level rise and land subsidence are also discussed. The Typhoon Tembin and Typhoon Bolaven influenced the East China Sea with equivalent intensity of tropical storm and Category 2, respectively, on the Saffir–Simpson hurricane wind scale. The Weather Research and Forecasting (WRF) model is utilized to hindcast the layered wind and atmospheric pressure fields above sea/land surface. Two synthetic scenarios isolating these individual typhoons are designed to investigate the potential impacts of the binary-interacted typhoons. By coupling with the SCHISM–WWMIII modelling system, the corresponding surge–tide–wave processes are solved and validated with measurements at tidal gauge and wave buoy stations. At the same time, The spatial-varied future relative sea level rise (RSLR) by the end of the century is projected from satellite altimeter data-based sea level analysis and is adjusted for the influence of the Glacial Isostatic Adjustment (GIA) using the ICE-6G/VM5a model. The results indicate that the surge and wave heights induced by these two typhoons were not exacerbated significantly, as the hours influencing the Yellow Sea by Typhoon Tembin were about 30 hours later than Typhoon Bolaven. We also present the spatial distribution of nonlinear responses of storm surge induced extreme sea levels to RSLR, implicating the regions of exacerbation and attenuation, respectively, due to future sea level trend. The present study helps identifying distribution patterns by binary-interacted typhoons and enhancing assessment accuracy of potential coastal hazards and flood risk.</p>

Estimation of freshwater and material fluxes from the Yangtze River into the East China Sea by using TOPEX/Poseidon altimeter data

2005 ◽  
Vol 19 (18) ◽  
pp. 3683-3698 ◽  
Author(s):  
Jiqun Zhang ◽  
Kaiqin Xu ◽  
Lianhui Qi ◽  
Yonghui Yang ◽  
Masataka Watanabe
Keyword(s):  
East China Sea ◽  
Yangtze River ◽  
East China ◽  
Altimeter Data ◽  
The Yangtze River ◽  
The East China Sea ◽  
China Sea ◽  
Material Fluxes

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.

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

Diet composition and feeding ecology of Nibea albiflora in Xiangshan Bay, east China Sea

2013 ◽  
Vol 20 (6) ◽  
pp. 1284-1292
Author(s):  
Nan LIN ◽  
Yazhou JIANG ◽  
Xingwei YUAN ◽  
Jing GUO ◽  
Jianzhong LING ◽  
...  
Keyword(s):  
East China Sea ◽  
Feeding Ecology ◽  
Diet Composition ◽  
East China ◽  
China Sea ◽  
Xiangshan Bay ◽  
Nibea Albiflora
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