Spatial variation of the tidal residual currents in the coastal area off Zhejiang and Fujian Provinces in the East China Sea

doi:10.3969/j.issn.1001-909X.2015.04.003

Abstract

Abstract: A detailed spatial structure of the tidal residual currents (TRCs) in the coastal area off Zhejiang and Fujian Provinces in the East China Sea was simulated by an unstructured grid-volume, three-dimensional, primitive equations ocean model (FVCOM). The simulated TRCs have apparent horizontal 2-D characters. The TRCs were further divided into three regions from north to south according to their velocity and direction, i.e., Region I, Region II and Region III. The TRCs in Region I and Region III are stronger but in opposite direction, flowing along isobaths in the southwestward with a velocity of 0.6~2.5 cm/s and northeastward directions with a velocity of 0.5~1.5 cm/s, respectively. The TRCs in Region II are weaker (less than 0.6 cm/s), and their directions are unticlockwise with the distance away from the coast. The analysis shows that the TRCs are directly proportional to the topographic beta factor ddx1H, this is consistent with the previous studies, and indicates the rectification of tidal currents when they flow over the steep bottom topography.

Key words: numerical simulation, tidal residual currents, topographic beta factor, coastal area off Zhejiang and Fujian Provinces

CLC Number:

P731

LIN Qi-liang, HUANG Da-ji, XUAN Ji-liang. Spatial variation of the tidal residual currents in the coastal area off Zhejiang and Fujian Provinces in the East China Sea[J]. Journal of Marine Sciences, 2015, 33(4): 30-36.

References

[1] PRANDLE D. Estuaries: Dynamics, mixing, sedimentation, and morphology [M]. Cambridge :Cambridge University Press,2009:236.
[2] LODER J W. Topographic rectification of tidal currents on the sides of Georges Bank [J]. J Phys Oceanogr,1980,10(9):1 399-1 416.
[3] HUTHNANCE J M. Tidal current asymmetries over the Norfolk Sandbanks [J]. Estuarine and Coastal Mar Sci,1973,I(1):89-99.
[4] HUTHNANCE J M. On mass transports generated by tides and long waves [J]. J Fluid Mec,1981,10(2):367-387.
[5] ZIMMERMAN J T F. Topographic generation of residual circulation by oscillatory (tidal) currents [J]. Geopnys Astrophys Fluid Dyn,1978,II(1):35-47.
[6] ZIMMERMAN J T F. Dynamics, diffusion and geomorphological significance of tidal residual eddies [J]. Nature,1981,290(5807):549-555.
[7] ROBINSON I S. Tidal vorticity and residual circulation [J]. Deep Sea Res,1980,28(81):195-212.
[8] ROBINSON I S. Tidally induced residual flows [M]//JOHNS B. Physical oceanography of coastal and shelf seas. Elsevier Oceanogr Ser,1983:321-356.
[9] MASS L R M, ZIMMERMAN J T F. On the exact shape of the horizontal profile of a topographically rectified tidal flow [J]. Geophys Fluid Dyn,1987,38(2):105-129.
[10] WRIGHT D G, LODER J W. On the influence of nonlinear bottom friction on the topographic rectification of tidal currents[J]. Geophys Astrophys Fluid Dyn,1988,42(3):227-245.
[11] MAZE R, LANGLOIS G, GROSJEAN F. Tidal eulerian residual currents over a slope: analytical and numerical frictionless models [J]. J Phys Oceagnogr,1998,28(7):1 321-1 332.
[12] MAZE R. Tidal rectification: friction or not friction [J]? J Phys Oceagnogr,1998,28(7):1 333-1 345.
[13] LODER J W, WRIGHT D G. Tidal rectification and frontal circulation on the sides of Georges Bank [J]. J Mar Res,1985,43(3):581-604.
[14] MASS L R M, ZIMMERMAN J T F. Tide-topography interactions in a stratified of shelf sea, I: Basic equations for quasi-nonlinear internal tides [J]. Geopnys Astrophys Fluid Dyn,1989a,45(1):1-35.
[15] MASS L R M, ZIMMERMAN J T F. Tide-topography interactions in a stratified of shelf sea, II: Bottom trapped internal tides and baroclinic residual currents [J]. Geopnys Astrophys Fluid Dyn, 1989b,45(1):37-69.
[16] CHEN Chang-sheng, BEARDSLEY R C. A numerical study of stratified tidal rectification over finite amplitude banks. Part I: Symmetric Banks [J]. J Phys Oceanogr,1995,25(9):2 090-2 110.
[17] CHEN Chang-sheng, BEARDSLEY R C, LIMEBURNER R. A numerical study of stratified tidal rectification over finite-amplitude banks. Part II: Georges Bank [J]. J Phys Oceanogr,1995,25(9):2 111-2 128.
[18] ZHAO Bao-ren, FANG Guo-hong, CAO De-ming. Characteristics of tidal residual currents and its relation to the near-shore circulation in the Bohai, the Yellow Sea and the East China Sea[J]. Studia Marina Sinica,1995,36(00): 1-11.
赵保仁,方国洪,曹德明.渤海、黄海和东海的潮余流特征及其与近岸环流输送的关系[J].海洋科学集刊,1995,36(00):1-11.
[19] WANG Kai, FENG Shi-zuo, SHI Xin-hui. A 3-D baroclinic model of summer circulation in the Bohai Sea, Yellow Sea and East China Sea[J]. Oceanol Limnol Sin,2001,32(5):551-560.
王凯,冯士筰,施心慧.渤、黄、东海夏季环流的三维斜压模型[J].海洋与湖沼,2001,32(5):551-560.
[20] QIAO Fang-li, ZHAO Wei, YUAN Ye-li. The research of the tidal long-term mass transport in the Bohai Sea, Yellow Sea and East China Sea[J]. Prog Nat Sci,2004,14(11):1 265-1 271.
乔方利,赵伟,袁业立.渤黄东海潮流长期物质输运研究[J].自然科学进展,2004,14(11):1 265-1 271.
[21] CHEN Qian, HUANG Da-ji, ZHANG Ben-zhao, et al. Characteristics of the tidal current and residual current in the seas adjacent to Zhejiang[J]. Donghai Mar Sci,2003a,21(4):1-14.
陈倩,黄大吉,章本照,等.浙江近海潮流和余流的特征[J].东海海洋,2003,21(4):1-14.
[22] CHEN Qian, HUANG Da-ji, ZHANG Ben-zhao. Numerical simulation of tide and tidal currents in the seas adjacent to Zhejiang[J]. Acta Oceanol Sin,2003b,25(5):9-20.
陈倩,黄大吉,章本照.浙江近海潮汐潮流的数值模拟[J]. 海洋学报,2003,25(5):9-20.
[23] DOU Zhen-xing, LUO Yuan-quan, HUANG Ke-xin, et al. Numerical computation of tidal current and tide-induced residual circulation in the Bohai Sea, Yellow Sea and East China sea[J]. Acta Oceanol Sin,1981,3(3):335-369.
窦振兴,罗远诠,黄克辛,等.渤、黄、东海潮流及潮余流的数值计算[J].海洋学报,1981,3(3):335-369.
[24] ZHAO Bao-ren, FANG Guo-hong, CAO De-ming. Numerical study on the tides and tidal currents in Bohai Sea, Yellow Sea and East China Sea[J]. Acta Oceanol Sin,1994,16(5):1-10.
赵保仁,方国洪,曹德明.渤、黄、东海潮汐潮流的数值模拟[J].海洋学报,1994,16(5):1-10.
[25] ZHU Xue-ming, BAO Xian-wen, SONG De-hai, et al. Numerical study on the tides and tidal currents in Bohai Sea, Yellow Sea and East China Sea[J]. Oceanol Limnol Sin,2012,43(6):1 103-1 113.
朱学明,鲍献文,宋德海,等.渤、黄、东海潮汐、潮流的数值模拟与研究[J].海洋与湖沼,2012,43(6):1 103-1 113.
[26] CHEN Chang-sheng, LIU He-dong, BEARDSLEY R C. An unstructured grid-volume, three-dimensional, primitive equations ocean model: application to coastal and estuaries [J]. J Atmos Oceanic Technol,2003,20(1):159-186.
[27] XUAN Ji-liang, YANG Zhao-qing, HUANG Da-ji, et al. Tidal residual current and its role in the mean flow on the Changjiang Bank[J]. J Mar Syst,2016,154A:66-81.