Abstract
The North Shandong Coastal Current (NSCC) is an important transporting route for sediment, drifting algae, and spilled oil from the Bohai Sea to the Yellow Sea. This study investigated the features and formation mechanism of the NSCC using observational data of current velocity and a numerical coastal ocean model. Our results confirmed the existence of the NSCC in the sense of climatological current in winter when northerly wind prevails in the Bohai Sea and Yellow Sea. The magnitude of the NSCC in the monthly time scale ranged 0.07–0.12 m/s and the current direction was parallel to the coastline. The detided residual current on the pathway of the NSCC was unstable, but variable with the local wind speed. The residual current was well correlated with northerly wind speed and tended to be parallel to coastline with the increase of wind speed. Strong wind plays key roles in the formation of eastward mean flow on the pathway of the NSCC in winter. We found that strong wind can generate a stronger eastward current in the southern side of the northern Yellow Sea, but a smaller westward return flow during the strong wind relaxation period. The asymmetry of wind-related residual current during and after strong wind events accounts for the formation of the eastward NSCC. A momentum analysis was performed using the numerical model results during strong wind events. We found that the barotropic pressure gradient was the dominant driving force of the residual current both during and after a strong wind event.
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Bi N, Yang Z, Wang H, Fan D, Sun X, Lei K (2011) Seasonal variation of suspended-sediment transport through the southern Bohai Strait. Estuar Coast Shelf Sci 93:239–247. https://doi.org/10.1016/j.ecss.2011.03.007
Chen C, Huang H, Beardsley R C, Liu H, Xu Q, Cowles G (2007) A finite volume numerical approach for coastal ocean circulation studies: Comparisons with finite difference models. J. Geophys. Res. 112:C03018. https://doi.org/10.1029/2006JC003485.
Copernicus Climate Change Service (C3S) (2017) ERA5: Fifth generation of ECMWF atmospheric reanalyses of the global climate. Copernicus Climate Change Service Climate Data Store (CDS). https://cds.climate.copernicus.eu/cdsapp#!/home
Ding Y et al (2019) Observational and model studies of synoptic current fluctuations in the Bohai Strait on the Chinese continental shelf. Ocean Dyn 69:323–351. https://doi.org/10.1007/s10236-019-01247-5
Ding Y, Bao X, Yao Z, Song D, Song J, Gao J, Li J (2018) Effect of coastal-trapped waves on the synoptic variations of the Yellow Sea Warm Current during winter. Cont Shelf Res 167:14–31. https://doi.org/10.1016/j.csr.2018.08.003
Egbert GD, Erofeeva SY (2002) Efficient Inverse Modeling of Barotropic Ocean Tides. J Atmos Oceanic Technol 19(2):183–204
Guo W et al (2016) The influence of surface wave on water exchange in the Bohai Sea. Cont Shelf Res 118:128–142. https://doi.org/10.1016/j.csr.2016.02.019
Hu Z, Wang D-P, He X, Li M, Wei J, Pan D, Bai Y (2017) Episodic surface intrusions in the Yellow Sea during relaxation of northerly winds. J Geophys Res Oceans 122:6533–6546. https://doi.org/10.1002/2017JC012830
Huang B, Ding L, Qin S, Fu W, Lu Q, Liu Z, Pang Y, Li X, Sun Z (2018) The Taxonomical status and biogeographical distribution of Sargassum horneri with the origin analysi. Oceanol Et Limnol Sin 49:214–223 (in Chinese with English abstract)
Huang D, Su J, Zhang L (1998) Numerical study of the winter and summer circulation in the Bohai Sea. Acta Aerodyn Sin 16:115–121 (in Chinese with English abstract)
Jacobs GA, Preller RH, Riedlinger SK, Teague WJ (1998) Coastal wave generation in the Bohai Bay and propagation along the Chinese coast. Geophys Res Lett 25:777–780. https://doi.org/10.1029/97GL03636
Ji C, Li K, Yu B, Dong L, Liu Q (2019) The multi-time scale variations of water exchange across the Bohai Strait. Oceanol Et Limnologia Sin 50:24–30 (in Chinese with English abstract)
Ju X, Ma C, Yao Z, Bao X (2020) Case analysis of water exchange between the Bohai and Yellow Seas in response to high winds in winter. J Oceanol Limnol 38:30–41. https://doi.org/10.1007/s00343-019-9100-2
Kim K, Shin J, Kim KY, Ryu J-H (2019) Long-term trend of green and golden tides in the Eastern Yellow Sea. J Coastal Res 90:317–323. https://doi.org/10.2112/SI90-040.1
Lee HJ, Jeon CK, Lim HS (2020) Dynamical analysis of the mud-belt formation in the Bohai, Yellow and East China seas. Mar Geol 423:106140. https://doi.org/10.1016/j.margeo.2020.106140
Li Y, Wolanski E, Zhang H (2015) What processes control the net currents through shallow straits? A review with application to the Bohai Strait, China. Estuar Coast Shelf Sci 158:1–11. https://doi.org/10.1016/j.ecss.2015.03.013
Li Z, Huang D (2019) Sea surface height and current responses to synoptic winter wind in the Bohai, Yellow, and East China Seas: two leading Coastal Trapped Waves. J Geophys Res Oceans 124:2289–2312. https://doi.org/10.1029/2018JC014120
Lie H-J, Cho C-H, Lee J-H, Lee S, Tang Y, Zou E (2001) Does the Yellow Sea Warm Current really exist as a persistent mean flow? J Geophys Res Oceans 106:22199–22210. https://doi.org/10.1029/2000JC000629
Liu X, Qiao L, Zhong Y, Wan X, Xue W, Liu P (2020) Pathways of suspended sediments transported from the Yellow River mouth to the Bohai Sea and Yellow Sea. Estuar Coast Shelf Sci 236:106639. https://doi.org/10.1016/j.ecss.2020.106639
Lu J, Qiao FL, Wang XH, Wang YG, Teng Y, Xia CS (2011) A numerical study of transport dynamics and seasonal variability of the Yellow River sediment in the Bohai and Yellow seas. Estuar Coast Shelf Sci 95:39–51. https://doi.org/10.1016/j.ecss.2011.08.001
Ma Q (2014) Numerical Study on Circulation and Water Exchange in Bohai Sea with High Wind. Dissertation, Ocean University of China (in Chinese with English abstract)
Naimie C, Ann Blain C, Lynch DR (2001) Seasonal mean circulation in the Yellow Sea— a model-generated climatology. Cont Shelf Res 21:667–695. https://doi.org/10.1016/S0278-4343(00)00102-3
Roberts J, Roberts TD (1978) Use of the Butterworth low-pass filter for oceanographic data. J Geophys Res Oceans 83:5510–5514. https://doi.org/10.1029/JC083iC11p05510
Qu L (2014) Study of the oceanic response to the winter strong wind events in the Yellow and Bohai Sea. Dissertation, Ocean University of China (in Chinese with English abstract)
Shen J et al (2019) Winter counter-wind current in western Taiwan Strait: characteristics and mechanisms. Cont Shelf Res 172:1–11. https://doi.org/10.1016/j.csr.2018.11.005
Song J et al (2017) Definition of water exchange zone between the Bohai Sea and Yellow Sea and the effect of winter gale on it. Acta Oceanol Sin 36:17–25. https://doi.org/10.1007/s13131-017-0989-z
Wan K, Bao X, Wang Y, Wan X, Li H, Liu K (2015) Barotropic current fluctuations coupled with sea level drawdown in Yellow and Bohai Seas. Chin J Oceanol Limnol 33:272–281. https://doi.org/10.1007/s00343-015-4056-3
Wang C et al (2020) The impact of winter storms on sediment transport through a narrow strait, Bohai. China J Geophys Res Oceans. https://doi.org/10.1029/2020JC016069
Wei Z, Li C, Fang G, Wang X (2003) Numerical diagnostic study of the summertime circulation in the Bohai Sea and the Water Transport in the Bohai Strait. Adv Mar Sci 21(4):454–464 (in Chinese with English abstract)
Wu X et al (2019) Novel, repeated surveys reveal new insights on sediment flux through a narrow Strait, Bohai, China. J Geophys Res Oceans 124:6927–6941. https://doi.org/10.1029/2019JC015293
Xing Q, Guo R, Wu L, An D, Cong M, Qin S, Li X (2017) High-resolution satellite observations of a new hazard of golden tides caused by floating Sargassum in Winter in the Yellow Sea. IEEE Geosci Remote Sens Lett 14:1815–1819. https://doi.org/10.1109/LGRS.2017.2737079
Xiong X (2012) Oceanography in China’s coastal waters—phisical oceanography and marine meteorology. Ocean Press, Beijing (in Chinese)
Yang Z, Ji Y, Bi N, Lei K, Wang H (2011) Sediment transport off the Huanghe (Yellow River) delta and in the adjacent Bohai Sea in winter and seasonal comparison. Estuar Coast Shelf Sci 93:173–181. https://doi.org/10.1016/j.ecss.2010.06.005
Yuan D, Hsueh Y (2010) Dynamics of the cross-shelf circulation in the Yellow and East China Seas in winter. Deep Sea Research Part II. Top Stud Oceangr 57:1745–1761. https://doi.org/10.1016/j.dsr2.2010.04.002
Yue F, Guo-hong F, Qing-hua Z (2000) Numerical simulation and dynamic study of the wintertime circulation of the Bohai Sea. Chin J Oceanol Limnol 18:1–9. https://doi.org/10.1007/BF02842535
Zhang Z, Qiao F, Guo J, Yu F (2010) Seasonal variation of coastal water movement in the Southern Bohai Sea and water exchange between the Bohai Sea and the Yellow Sea. Adv Mar Sci 28(2):142–148 (in Chinese with English abstract)
Zhang Z, Qiao F, Guo J, Guo B (2018) Seasonal changes and driving forces of inflow and outflow through the Bohai Strait. Cont Shelf Res 154:1–8. https://doi.org/10.1016/j.csr.2017.12.012
Acknowledgements
The authors are grateful to the group of Prof. Hua Zhang for providing the observational data used in this study. The authors thank the anonymous reviewers for their helpful comments. This work is supported by Key Deployment Project of Centre for Ocean Mega-Research of Science, Chinese academy of sciences with No. COMS2019J05; the Strategic Priority Research Program of the Chinese Academy of Sciences Grant XDA19060205; the Key Research and Development project of Yantai (2017ZH095).
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Zheng, X., Zhang, H., Li, Y. et al. The features and mechanisms of the North Shandong Coastal Current: a case study in 2014. J Oceanogr 77, 631–646 (2021). https://doi.org/10.1007/s10872-021-00597-3
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DOI: https://doi.org/10.1007/s10872-021-00597-3