潮汐作用下渤海温跃层波动与起伏的数值研究

周小兵; 张延廷; 曾庆存

潮汐作用下渤海温跃层波动与起伏的数值研究

1.
北京大学地球物理系, 北京 100871
2.
国家海洋局第一海洋研究所, 山东青岛 266061
3.
中国科学院大气物理研究所, 北京 100080

基金项目: 国家重点基础研究发展规划项目(G1998040900)第一部分;国家自然科学基金资助项目(49905007;49776283)

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出版历程
- 收稿日期: 2000-06-06
- 修回日期: 2001-10-08

The interface waves of thermocline excited by the principal tidal constituents in the Bohai Sea

1.
Department of Geophysics, Peking University, Beijing 100871, China
2.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
3.
The Institute of Atmospheric Physics, Chinese Academy of Sciences,Beijing 100080, China

摘要

摘要: 研究了潮汐(四大分潮 M₂,S₂,K₁,O₁同时输入)作用下渤海温跃层起伏与波动的三维数值模型(将海洋分为3层,即上混和层、跃层和下混和层),揭示了整个海区温跃层上界面处跃层起伏(在文中指每个时刻跃层波高的周期平均值)的地理分布及叠加在起伏之上的潮周期波动的时空变化,模拟出跃层波动与实测基本一致.结果发现大振幅的跃层波动均发生在海峡及近海地形突变之处.一般界面波动的波高大于甚至远远大于同一位置的表层潮波.从位相以及周期来看,潮波和跃层上下界面波动相互之间,有些海域一致,有些地方则相差甚远.跃层上界深度及厚度的梯度,对跃层起伏分布有一定的影响.跃层起伏还可能与海岸海底摩擦有关.
- 潮汐 /
- 余流 /
- 跃层 /
- 起伏与波动
Abstract: In this study,interface waves of thermocline layer are simulated by the model in the Bohai Sea.The waves are excited by tidal oscillation.The numerical model is three-dimensional nonlinear.In the vertical direction,the sea is separated into three layers,namely,upper mixing layer,thermal layer and lower mixing layer.Four principal tidal components,which are M₂,S₂,K₁,O₁ are considered in the model.So the surface waves are tidal ones.Not only the temporal varied internal waves have been analyzed,but time-mean values of them,which are called undulation in the paper,have been did.The result shows that the wave of the thermocline is consistent with observations.The waves in the upper and lower surface of thermocline are different in the phase,amplitude,even period in many places.The interface waves of large amplitude occur in the areas with a convex coastline and complex variation of depth.Compared with tidal residual elevation,the undulations of thermocline are larger.And higher absolute values also lie in the near coastline and the areas with complex topography.The bottom friction and topography play a major role for the undulation and interface-wave height.
- tide /
- mean current /
- thermocline /
- fluctuation and the undulation

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参考文献(23)

万邦君,郭炳火,陈则实黄海热结构的三层模式[J].海洋学报,1990,12(2):137～148.

金梅兵,王宗山,徐伯昌.黄、渤海温度垂直结果三维数值预报[J].海洋学报,1994,16(2):13～20

赵保仁渤、黄海及东海北部强温跃层的基本特征及形成机制的研究[J] 海洋学报,1989,11(4):401～410

GILL A E,TURNER J S.A comparison of seasonal thermocline models with observation [J].Deep-Sea Res,1976,23:391～401.

STEVENSON T W.On the effect of dissipation on seasonal thermocline models [J].J Phys Oceanogr,1979,9:57～64.

GILL A E,NILLER P P.The theory of the seasonal variability in the ocean [J].Deep-Sea Res,1973,20(9):57～64.

NILLER P P.Deepening of the wind-mixing layer[J].J Mar Res,1975,33:405～422.

DE SZOEKE R A.On the effect of horizontal variability of wind stress on the dynamics of the ocean mixed layer [J].J Phys Oceanogr,1980,10:1 439～1 454.

STIGEBRANDT A.A model for the seasonal pycnocline in the rotating systems with application to the Baltic proper [J].J Phys Oceanogr,1985,15:1 392～1 404.

RATTRAY M,DWORSKI J G,KOVALA P E.Generation of long internal waves at continental slope [J].Deep-Sea Res,1969,16(Suppl.):179～195.

PRINSENBERG S J,RATTRAY M.Effects of continental slope and variable Brunt-V asia frequency on the coastal generation of internal tides [J].Deep-Sea Res,1975,22:251～263.

SANDSTROMH.On topogrphic generation and coupling of intemal waves [J].Geophys Fluid Dyn,1976,7:231～270.

BAINES P G.The generation of internal tides by flat-bump topography [J].Deep-Sea Res,1973,20:179～205.

BAINES P G.The generation of internal tides over steep continental slopes [J].Philos Trans Roy Soc London,1974,A277:27～58.

BAINES P G.On internal tide generation models [J].Deep-Sea Res,1982,29:307～338.

CHUNG W,WANG D P.Effects of a density front on the generation and propagation of internal tides [J].J Phys Oceanogr,1981,11:1 357～1 374.

SERPETTE A,TAYLOR N K.Numerical investigations of linear internal tide generation in the Rockall Trough [J].DeepSea Res,1990,(10):1 595～1 618.

WlLMONT A J,EDWARDS P D.A numerical model for the generation of tidally forced nonlinear internal waves over topography [J].Contin Shelf Res,1987,(5):457～484.

SERPETTE A,MAZE A.Internal tides in the Bay of Biscay:A two-dimensional model [J].Contin Shelf Res,1989,(9):795～821.

YOSHIHIRO Niwa,TOSHIYUKI Hibiya.Nonlinear process of energy transfer from traveling hurricanes to the deep ocean internal wave field [J].Journal of Geophysical Research,1997,102((C6):12 469～12 477.

张延廷,王以娇.渤海潮汐(流)作用下跃层起伏与波动的数值模拟[A] 中国海洋学文集(1)[C] 北京:海洋出版社,1991.48～55

张延廷,王以娇.北黄海跃层起伏与波动的数值研究[A].中国海洋学文集(1)[C] 北京:海洋出版社,1991.56～65

张延廷,王以娇.风扰动下,渤海跃层深度变化与波动的数值模拟[A] 中国海洋学文集(1)[C] 北京:海洋出版社,1991.40～47

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