近岸强海流切变锋作用下悬浮沉积物的输送和沉积&mdash;&mdash;以山东半岛东端外海为例

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近岸强海流切变锋作用下悬浮沉积物的输送和沉积——以山东半岛东端外海为例

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中图分类号: P512.2 P736.21

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文章访问数: 1599
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Suspended Sediment Transport and Deposition due to Strong Regional Shear Current Front: an example from the shelf waters off eastern Shandong Peninsula

摘要

摘要: 利用2007年国家908专项ST02区块（渤海海峡及北黄海）水体专项夏季和冬季两个航次调查的温度、浊度和悬浮体浓度数据，选取了跨越山东半岛东端外海泥质沉积体的B1和B2两个断面，结合该区浅地层剖面资料，辅以研究海域的冬季环流数值模拟，着重分析了山东半岛东端外海强海流切变锋作用下的悬浮体输送和沉积特征。结果表明山东半岛东端外海悬浮体向外海输送存在类似“夏储冬输”的规律：夏季，北黄海海水浊度普遍小，不仅北黄海温跃层抑制了底层悬浮体向中上层水体扩散，而且北黄海冷水团在中底层与山东半岛东部沿岸水也形成了显著的温度和悬浮体锋面，阻碍了悬浮物的纬向输送，故夏季应是悬浮体沉积的主要时节；冬季，温跃层消亡，在强风的作用下，山东半岛东部悬浮体浓度高且垂向混合较好，然而在泥质沉积体顶积层两侧，山东半岛东部沿岸中下层北上的逆风补偿流和北上的黄海暖流与位于顶积层上方表中层南下的沿岸流构成了两道显著的强海流切变锋，使得底积层上大量的再悬浮沉积物不能越过山东半岛东部陆架末梢，从而有助于形成山东半岛东端外海特有的Ω状泥质沉积体。
- 悬浮体 /
- 北黄海冷水团 /
- 海流切变锋 /
- 黄海暖流 /
- 泥质沉积体
Abstract: Based on field data of temperature, turbidity and suspended matter concentration in summer and winter derived from the project named National Coastal Sea Comprehensive Investigation and Evaluation (908ST02), the suspended sediment transport and deposition due to strong regional shear current front off eastern Shandong Peninsula were studied, combined with observation from B1 and B2 sections, circulation simulation in winter by POM model and shallow seismic profile. The results show that the transportation mechanism of suspended matter off eastern Shandong Peninsula is similar to the existing rule in East China Sea: deposition in summer and transport in winter. In summer, not only suspended matter was restricted near bottom by thermocline, but also restricted by the front formed by coastal currents off eastern Shandong Peninsula and northern Yellow Sea cold water mass. Therefore suspended matter mainly deposited in summer. In winter, with the help of strong northeastly wind and the thermocline, the turbidity was high vertical mixing was better off eastern Shandong Peninsula. However, two strong shear current fronts could be found on both sides of the topset of mud wedge, which was respectively generated by northward upwind compensation current along eastern Shandong Peninsula in the middle and lower water, northward Yellow Sea warm currents and southward coastal wind currents above topset of mud wedge. The two strong shear current fronts prevented suspended sediments from bottomset of the mud wedge getting cross eastern Shandong Peninsula continental shelf peripheral, which was helpful to omegashaped (‘Ω’) mud wedge formation off eastern Shandong Peninsula.
- suspended sediment /
- Yellow Sea cold water mass /
- yellow Sea warm current /
- muddy wedge /

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[1]	岑欣, 王任, 殷科, 石万忠, 李顾盼, 胡小强. 中国东部北黄海盆地白垩纪红色泥岩致色矿物特征及其古环境效应 . 沉积学报, 2024, (): -. doi: 10.14027/j.issn.1000-0550.2024.001
[2]	刘庚, 韩喜彬, 陈燕萍, 胡邦琦, 易亮. 南黄海沉积物磁性特征及其对物源变化的指示 . 沉积学报, 2021, 39(2): 383-394. doi: 10.14027/j.issn.1000-0550.2020.017
[3]	秦亚超, 孙荣涛, 王红, 田振兴, 徐扬, 温珍河. 南黄海西部日照海域海侵沉积地层及其古环境意义 . 沉积学报, 2020, 38(4): 790-809. doi: 10.14027/j.issn.1000-0550.2019.063
[4]	王勇智, 张永强, 孙惠凤. 山东半岛东部海域悬浮体分布季节变化及其冬季输送通量研究 . 沉积学报, 2019, 37(3): 541-549. doi: 10.14027/j.issn.1000-0550.2018.169
[5]	蔡来星, 郭兴伟, 徐朝晖, 张晓华, 李文强, 肖国林, 朱晓青, 侯方辉. 南黄海盆地中部隆起上古生界沉积环境探讨 . 沉积学报, 2018, 36(4): 695-705. doi: 10.14027/j.issn.1000-0550.2018.124
[6]	陈晓辉, 李日辉, 蓝先洪, 王燕. MIS3中期以来北黄海中部陆架古环境演化 . 沉积学报, 2016, 34(1): 102-110. doi: 10.14027/j.cnki.cjxb.2016.01.009
[7]	王震, 乔璐璐, 王云飞. 东中国海表层悬浮体浓度卫星遥感反演研究进展 . 沉积学报, 2016, 34(2): 292-307. doi: 10.14027/j.cnki.cjxb.2016.02.008
[8]	赵青芳, 李双林, 温珍河, 龚建明, 肖国林, 吴亮亮. 北黄海盆地LV井侏罗系烃源岩特征及油源对比 . 沉积学报, 2016, 34(4): 794-802. doi: 10.14027/j.cnki.cjxb.2016.04.019
[9]	逄悦, 范德江, 孙晓霞, 刘明, 杨作升. 长江口及邻近海域悬浮颗粒重晶石特征与成因探讨 . 沉积学报, 2016, 34(3): 523-530. doi: 10.14027/j.cnki.cjxb.2016.03.010
[10]	王改云, 刘金萍, 王后金, 简晓玲, 杜民. 北黄海盆地东部坳陷中生界沉积特征及演化 . 沉积学报, 2015, 33(3): 561-567. doi: 10.14027/j.cnki.cjxb.2015.03.014
[11]	沈星, 褚忠信, 王玥铭, 李应坤, 苗安洋, 梁玉蕾. 北黄海西部与南黄海中部泥质区岩芯敏感粒级及其环境意义 . 沉积学报, 2015, 33(1): 124-133. doi: 10.14027/j.cnki.cjxb.2015.01.013
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[13]	. 南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示 . 沉积学报, 2013, 31(1): 108-119.
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[20]	王开发, 蒋辉. 黄海晚更新世以来的硅藻组合及其沉积环境 . 沉积学报, 1987, 5(1): 94-103.

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文章访问数: 1599
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近岸强海流切变锋作用下悬浮沉积物的输送和沉积——以山东半岛东端外海为例

刊出日期: 2013-06-10

中图分类号: P512.2 P736.21

关键词:

悬浮体 /

摘要: 利用2007年国家908专项ST02区块（渤海海峡及北黄海）水体专项夏季和冬季两个航次调查的温度、浊度和悬浮体浓度数据，选取了跨越山东半岛东端外海泥质沉积体的B1和B2两个断面，结合该区浅地层剖面资料，辅以研究海域的冬季环流数值模拟，着重分析了山东半岛东端外海强海流切变锋作用下的悬浮体输送和沉积特征。结果表明山东半岛东端外海悬浮体向外海输送存在类似“夏储冬输”的规律：夏季，北黄海海水浊度普遍小，不仅北黄海温跃层抑制了底层悬浮体向中上层水体扩散，而且北黄海冷水团在中底层与山东半岛东部沿岸水也形成了显著的温度和悬浮体锋面，阻碍了悬浮物的纬向输送，故夏季应是悬浮体沉积的主要时节；冬季，温跃层消亡，在强风的作用下，山东半岛东部悬浮体浓度高且垂向混合较好，然而在泥质沉积体顶积层两侧，山东半岛东部沿岸中下层北上的逆风补偿流和北上的黄海暖流与位于顶积层上方表中层南下的沿岸流构成了两道显著的强海流切变锋，使得底积层上大量的再悬浮沉积物不能越过山东半岛东部陆架末梢，从而有助于形成山东半岛东端外海特有的Ω状泥质沉积体。

Suspended Sediment Transport and Deposition due to Strong Regional Shear Current Front: an example from the shelf waters off eastern Shandong Peninsula

Publish Date: 2013-06-10

Keywords:

Abstract: Based on field data of temperature, turbidity and suspended matter concentration in summer and winter derived from the project named National Coastal Sea Comprehensive Investigation and Evaluation (908ST02), the suspended sediment transport and deposition due to strong regional shear current front off eastern Shandong Peninsula were studied, combined with observation from B1 and B2 sections, circulation simulation in winter by POM model and shallow seismic profile. The results show that the transportation mechanism of suspended matter off eastern Shandong Peninsula is similar to the existing rule in East China Sea: deposition in summer and transport in winter. In summer, not only suspended matter was restricted near bottom by thermocline, but also restricted by the front formed by coastal currents off eastern Shandong Peninsula and northern Yellow Sea cold water mass. Therefore suspended matter mainly deposited in summer. In winter, with the help of strong northeastly wind and the thermocline, the turbidity was high vertical mixing was better off eastern Shandong Peninsula. However, two strong shear current fronts could be found on both sides of the topset of mud wedge, which was respectively generated by northward upwind compensation current along eastern Shandong Peninsula in the middle and lower water, northward Yellow Sea warm currents and southward coastal wind currents above topset of mud wedge. The two strong shear current fronts prevented suspended sediments from bottomset of the mud wedge getting cross eastern Shandong Peninsula continental shelf peripheral, which was helpful to omegashaped (‘Ω’) mud wedge formation off eastern Shandong Peninsula.

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近岸强海流切变锋作用下悬浮沉积物的输送和沉积——以山东半岛东端外海为例

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Suspended Sediment Transport and Deposition due to Strong Regional Shear Current Front: an example from the shelf waters off eastern Shandong Peninsula

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近岸强海流切变锋作用下悬浮沉积物的输送和沉积——以山东半岛东端外海为例

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Suspended Sediment Transport and Deposition due to Strong Regional Shear Current Front: an example from the shelf waters off eastern Shandong Peninsula

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近岸强海流切变锋作用下悬浮沉积物的输送和沉积——以山东半岛东端外海为例

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Suspended Sediment Transport and Deposition due to Strong Regional Shear Current Front: an example from the shelf waters off eastern Shandong Peninsula

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出版历程

目录

近岸强海流切变锋作用下悬浮沉积物的输送和沉积——以山东半岛东端外海为例

English Abstract

Suspended Sediment Transport and Deposition due to Strong Regional Shear Current Front: an example from the shelf waters off eastern Shandong Peninsula

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友情链接

期刊在线

联系我们