鲁海丰海洋牧场流场特征分析
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摘要
根据海底有缆观测系统连续观测得到的3个半月的海水流矢量资料,利用功率谱分析、调和分析、旋转谱分析和相关分析等方法研究了鲁海丰海洋牧场海域海流的时间变化规律和空间结构特征。主要结论如下:在整个水体厚度上,西北向流占优,呈现出向岸流的特点,且由表及底,西向流减弱,北向流增强;潮流类型为正规半日潮,M_2分潮流为主,各层主要分潮流均表现为以逆时针方向旋转为主的往复运动,总体上观测点的日周期波动只由全日潮流引起,不受当地惯性流影响。此外观测点处的流还表现出更高频的波动周期;鲁海丰海洋牧场的表层余流主要由海面风场驱动,同时也受到山东半岛沿岸流的影响。
Based oncurrent vectors of about three and a half months observed by the submarine cable online observation system, we investigated the temporal variation and spatial structureof the current field in Luhaifeng Marine Ranch through power spectral analysis, harmonic analysis, rotary spectral analysis and correlation analysis. The main conclusions are as follows. Basically, the time-averaged flow is dominantly northwestwardtoward the coast throughout the whole depth. Moreover, from surface to bottom the westwardflow weakens while the northward flow strengthens. The tidal current is dominated byregular semi-diurnal tidal currents with the M_2 constituent being the strongest. All the main tidal constituents in each layer takea near-rectilinear counterclockwise rotation. Further analysis indicates that the observed diurnal variations are dominantly controlled by diurnal tide currents with no contribution from inertial motions. The sea surface residual current is mainly forced by the sea surface wind. It is also influenced by the coastal current around Shandong Peninsula.
Based oncurrent vectors of about three and a half months observed by the submarine cable online observation system, we investigated the temporal variation and spatial structureof the current field in Luhaifeng Marine Ranch through power spectral analysis, harmonic analysis, rotary spectral analysis and correlation analysis. The main conclusions are as follows. Basically, the time-averaged flow is dominantly northwestwardtoward the coast throughout the whole depth. Moreover, from surface to bottom the westwardflow weakens while the northward flow strengthens. The tidal current is dominated byregular semi-diurnal tidal currents with the M_2 constituent being the strongest. All the main tidal constituents in each layer takea near-rectilinear counterclockwise rotation. Further analysis indicates that the observed diurnal variations are dominantly controlled by diurnal tide currents with no contribution from inertial motions. The sea surface residual current is mainly forced by the sea surface wind. It is also influenced by the coastal current around Shandong Peninsula.
引文
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[2] 赵保仁.局地风对黄海和东海近岸浅海海流影响的研究[J].海洋与湖沼,1982,13(6):479-489.Zhao Baoren.A study of the effects of local wind on currents in the off-shore areas of the East China Sea and Huanghai Sea[J].Oceanologia Et Limnologia Sinica,1982,13(6):479-489.
[3] 汤毓祥,姚兰芳.南黄海潮流和潮余流的数值计算[J].海洋湖沼通报,1989,2(1):1-7.Tang Yuxiang,Yao Lanfang.Numerical modelling of the tidal and tide-induced residual currents in the Southern Huanghai Sea[J].Transactions of Oceanology and Limnology,1989,2(1):1-7.
[4] 汤毓祥,邹娥梅,李兴宰,等.初春南黄海水位特征及环流状况的分析[J].海洋学报,1999,21(5):1-10.Tang Yuxiang,Zou Emei,Li Xingzai,et al.Analysis of hydrographic features and circulation situation in the Southern Huanghai Sea in early spring[J].Acta Oceanologica Sinica,1999,21(5):1-10.
[5] Tang X,Wang F,Chen Y,et al.Current observations in the southern Yellow Sea[J].Chinese Journal of Oceanology and Limnology,2004,22(3):217-223.
[6] Pang C,Bai X,Bai H.Seasonal evolution of circulation and thermal structure in the Yellow Sea[J].Chinese Journal of Oceanology and Limnology,2005,23(3):269-274.
[7] 张志欣.中国近海沿岸流及毗邻流系的观测与分析研究[D].青岛:中国海洋大学,2014:32-36.Zhang Zhixin.Observation and Analysis of the Coastal Current and Its Adjacent Current System in the China Offshore Waters[D].Qingdao:Ocean University of China,2014:32-36.
[8] Liu Z,Hu D,Chu Z.Observation of currents in the Southern Yellow Sea in the summers of 2001 and 2003[J].Journal of Ocean University of China,2008,7(1):17-26.
[9] Pawlowicz R,Beardsley B,Lentz S,et al.Classical tidal harmonic analysis including error estimates in MATLAB using T_TIDE[J].Computers & Geosciences,2002,28(8):929-937.
[10] 杜岩,齐义泉,陈举,等.东海定点连续观测站海流资料分析[J].海洋工程,2003,20(1):94-100.Du Yan,Qi Yiquan,Chen Ju,et al.Current analysis at a continuous observation station in the East China Sea[J].The Ocean Engineering,2003,20(1):94-100.
[11] 钮智旺,于宾.北部湾单站海流旋转谱分析[J].热带海洋,1991,10(4):74-78.Niu Zhiwang,Yu Bin.Analysis of rotary spectra current at a single station in Beibu Gulf[J].Tropic Oceanology,1991,10(4):74-78.
[12] 费岳军,史军强,堵盘军,等.冬季舟山外海定点实测海流资料分析[J].海洋通报,2013,32(6):648-656.Fei Yuejun,Shi Junqiang,Du Panjun,et al.Analysis of the mooring current data near Zhoushan Islands[J].Marine Science Bulletin,2013,32(6):648-656.