首页|Numerical simulation of the dual-core structure of the Bohai Sea cold bottom water in summer

Numerical simulation of the dual-core structure of the Bohai Sea cold bottom water in summer

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Regional Ocean Modeling Systems (ROMS 3.0) and the K-ε turbulence closure scheme has been ap-plied to investigating the seasonal evolution of the thermsocline in the Bohsi Sea. The simulation re-produces the stratifications lasting from early April to early September and reveals the existence of marked Asymmetric Dual-Core Cold Bottom Water (ADCCBW) in the south and north depression basin respectively under the thermocline. The bottom temperature in the north depression is about 1-4℃ lower than that in the south depression basin which is in good agreement with observations. Model results suggest that the local bathymetry characteristics and inhomogeneous net heat flux due to the latitude difference are the major cause for the early formation of the ADCCBW. Numerical Lagrangian drifter experiments support the finding that the ADCCBW is maintained throughout the stratification periods by the inflow of cold bottom water from the northern Yellow Sea and deep channel in the western side of Liaodong Peninsula. The inflow cold water contributes to the north depression basin distinctively larger than to the south one. Tidal mixing enhances the bottom temperature asymmetry between the two basins.

Bohai SeastratificationROMSADCCBWdepression basin

ZHOU Feng、HUANG DaJi、SU JiLan

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Department of Fluid Mechanics, School of Aeronautics and Astronautics of Zhejiang University, Hangzhou 310027, China

State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration,Hangzhou 310012, China

973 Project from the Ministry of Science and Technology of China国家自然科学基金浙江省自然科学基金Youth Marine Science Foundation of State Oceanic Administra-tion

2006CB40060340706018Y5072292007204

2009

10.1007/s11434-009-0019-4

科学通报(英文版)
中国科学院

科学通报(英文版)

SCI
ISSN：1001-6538
年,卷(期)：2009.54(23)
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