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新仙女木期古黄海潮流场的数值模拟

韩喜彬 ,  史经昊 ,  李家彪 ,  李广雪

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文章导航 > 海洋地质与第四纪地质  > 2009 >  29(1): 13-23
韩喜彬, 史经昊, 李家彪, 李广雪. 新仙女木期古黄海潮流场的数值模拟[J]. 海洋地质与第四纪地质, 2009, 29(1): 13-23. doi: 10.3724/SP.J.1140.2009.01013
引用本文: 韩喜彬, 史经昊, 李家彪, 李广雪. 新仙女木期古黄海潮流场的数值模拟[J]. 海洋地质与第四纪地质, 2009, 29(1): 13-23. doi: 10.3724/SP.J.1140.2009.01013
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HAN Xibin, SHI Jinghao, LI Jiabiao, LI Guangxue. DYNAMICAL SIMULATION ON TIDAL CURRENT FIELD IN ANCIENT YELLOW SEA DURING YOUNGER DRYAS EPISODE[J]. Marine Geology & Quaternary Geology, 2009, 29(1): 13-23. doi: 10.3724/SP.J.1140.2009.01013
Citation: HAN Xibin, SHI Jinghao, LI Jiabiao, LI Guangxue. DYNAMICAL SIMULATION ON TIDAL CURRENT FIELD IN ANCIENT YELLOW SEA DURING YOUNGER DRYAS EPISODE[J]. Marine Geology & Quaternary Geology, 2009, 29(1): 13-23. doi: 10.3724/SP.J.1140.2009.01013
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新仙女木期古黄海潮流场的数值模拟


doi: 10.3724/SP.J.1140.2009.01013
详细信息

  • 1 国家海洋局 海底科学重点实验室, 国家海洋局 第二海洋研究所, 杭州 310012;

  • 2 海底科学与探测技术教育部重点实验室, 中国海洋大学, 青岛 266100

    • 作者简介:

    韩喜彬(1976-),男,博士,从事海洋地质研究,E-mail:xibinhan@126.com

  • 基金项目:

    中国海洋大学海底科学与探测技术教育部重点实验室开放课题

    国家海洋局第二海洋研究所基本科研业务费专项

  • 中图分类号: P66

DYNAMICAL SIMULATION ON TIDAL CURRENT FIELD IN ANCIENT YELLOW SEA DURING YOUNGER DRYAS EPISODE

More Information

  • 1 Lab of Submarine Geosciences, Second Institute of Oceanography, SOA, Hangzhou 310012, China;

  • 2 Key Lab of Sea Floor Resource and Exploration Technique, MOE, Ocean University of China, Qingdao 266100, China

  • 摘要: 新仙女木事件发生时(12.9~11.6 cal.kaBP),中国东部陆架海平面在-66 m等深线附近振荡徘徊,海水进入到现代北黄海南部,黄海形成了一个狭长的通道型海湾。运用环境流体动力学模型(EFDC)对这特殊的狭长通道型海湾潮流场进行数值模拟,计算中采用水平方向上的曲线正交坐标与垂直方向上的Sigma坐标相结合以及三维数学模型二维化的方法。模拟结果显示当时的潮流场非常的强,水深较浅的区域多为旋转流,水深较深的中间槽部区域多呈往复流,不断冲刷底部,带走悬浮泥砂。进入黄海后,潮波从前进波转变成旋转波,并在西岸出现两个发育不完全的无潮点。潮余流在古黄海西部及中部海域一致向东南和南向流动,并且流速较大,但在口门处流速减小,海湾中部冲刷起的底部沉积物可能被余流带出并沉积下来形成济州岛西南泥质区。而在东部海域,余流具有向北流的趋势,从而在古海湾的中央区域形成一个较为明显的逆时针向环流,很有可能是韩国西南现代泥质区接收泥质沉积的开始。南黄海东侧发育的潮流沙脊群的延伸方向及潮流砂的粒度组成和古黄海的潮流场有很好的对应关系,新仙女木时期波动较小的海平面和稳定的潮流场是潮流沙脊群形成的有利因素。可以说新仙女木期的海流、潮流和潮余流对古黄海的塑造奠定了现代黄海的形态。
    Abstract: During Younger Dryas episode (12.9~11.6 cal. ka), the sea level oscillated at about -66 m depth contour in the continental shelf seas in eastern China and the seawater got into the south of the present North Yellow Sea,so Yellow Sea became a long narrow channel gulf. To simulate the tidal current of this special gulf, Environmental Fluid Dynamics Computer Code is used in this paper. The calculation combines curvilinear orthogonal coordinates in the horizontal direction with Sigma mapping coordinates in the vertical direction, and it uses a method which transforms a problem from three-dimension into two-dimension. The results show that the tidal current was still very strong in Yellow Sea during Younger Dryas episode, entering the special gulf along the right side entrance. From both shallow sides to deep centre, rotating flow changes reciprocating flow. Under the effect of reciprocating flow, the floor is eroded and the mud and sand are carried away. Progressive wave turns into rotating wave and two ateliotic amphidromic points appear on the western side of the gulf after tidal wave coming into Yellow Sea. At the same time, tidal residual current flows to southeast and east with relatively great velocity at the west and interior gulf and it becomes weakly near the entrance. The current may carry the bottom sediments and discharge them to the present mud sediment zone in north East China Sea. But at eastern Yellow Sea the tidal residual current flows to north and forms an anticlockwise circulation at centre of the eastern gulf which is corresponding to the eddy mud zone in Southeast Yellow Sea (Heishan mud zone). The anticlockwise circulation captures suspended sediment and may gestate the present mud sediment zone. The extension direction of tidal sand ridges and the size composition of the tidal current sand in eastern South Yellow Sea have a close relationship with the tidal current field of the ancient Yellow Sea, so the less fluctuating sea level changing and the relative stable tidal current field are the favorable factors for the tidal sand ridges during Younger Dryas episode in ancient Yellow Sea. It can be said that the ocean current, tidal current and tidal residual current figure the pattern of the present Yellow Sea during Younger Dryas episode.
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出版历程
  • 收稿日期:  2008-09-23
  • 修回日期:  2008-12-09

新仙女木期古黄海潮流场的数值模拟

doi: 10.3724/SP.J.1140.2009.01013
  • 1 国家海洋局 海底科学重点实验室, 国家海洋局 第二海洋研究所, 杭州 310012;
  • 2 海底科学与探测技术教育部重点实验室, 中国海洋大学, 青岛 266100
    • 作者简介:

    韩喜彬(1976-),男,博士,从事海洋地质研究,E-mail:xibinhan@126.com

  • 收稿日期: 2008-09-23
  • 修回日期: 2008-12-09
基金项目:

中国海洋大学海底科学与探测技术教育部重点实验室开放课题

国家海洋局第二海洋研究所基本科研业务费专项

  • 中图分类号: P66

摘要: 新仙女木事件发生时(12.9~11.6 cal.kaBP),中国东部陆架海平面在-66 m等深线附近振荡徘徊,海水进入到现代北黄海南部,黄海形成了一个狭长的通道型海湾。运用环境流体动力学模型(EFDC)对这特殊的狭长通道型海湾潮流场进行数值模拟,计算中采用水平方向上的曲线正交坐标与垂直方向上的Sigma坐标相结合以及三维数学模型二维化的方法。模拟结果显示当时的潮流场非常的强,水深较浅的区域多为旋转流,水深较深的中间槽部区域多呈往复流,不断冲刷底部,带走悬浮泥砂。进入黄海后,潮波从前进波转变成旋转波,并在西岸出现两个发育不完全的无潮点。潮余流在古黄海西部及中部海域一致向东南和南向流动,并且流速较大,但在口门处流速减小,海湾中部冲刷起的底部沉积物可能被余流带出并沉积下来形成济州岛西南泥质区。而在东部海域,余流具有向北流的趋势,从而在古海湾的中央区域形成一个较为明显的逆时针向环流,很有可能是韩国西南现代泥质区接收泥质沉积的开始。南黄海东侧发育的潮流沙脊群的延伸方向及潮流砂的粒度组成和古黄海的潮流场有很好的对应关系,新仙女木时期波动较小的海平面和稳定的潮流场是潮流沙脊群形成的有利因素。可以说新仙女木期的海流、潮流和潮余流对古黄海的塑造奠定了现代黄海的形态。

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