• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Dynamics >Seasonal variation of water column structure and sediment transport in a mud depo-center off the Zhejiang-Fujian coast in China
【24h】

Seasonal variation of water column structure and sediment transport in a mud depo-center off the Zhejiang-Fujian coast in China

机译：中国浙江-福建沿岸泥浆沉积中心水柱结构和泥沙输送的季节性变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two surveys were conducted in December, 2008, and August, 2009, in the mud depo-center off the Zhejiang-Fujian coast (MDZFC) in the inner shelf of East China Sea to depict the seasonal variation of the water column structure and analyze the factors responsible for the variation. The results were also used to discuss the sediment transport process and formation mechanism of the MDZFC. The water column structures varied significantly between the two surveys, with respect to the temperature, salinity, and turbidity. The summer water body, with relatively high temperatures and salinities, was evidently stratified with respect to the temperature, whereas the salinity remained constant throughout the water column. The stratification restricts sediment resuspension and transport. From the north to the south, the temperature in the middle-bottom water layer slightly increased, whereas the salinity remained mostly constant. In winter, the water body, with relatively low temperatures and salinities, was well mixed vertically. The temperature and salinity both increased from the surface to the bottom toward the east (deep water) and the south. A wedge-shaped water mass, which appears as a coastal upwelling, with relatively low temperature and high salinity in summer and relatively high temperature and high salinity in winter, spread landward along the sea floor, from the sea deeper than 50 m, whereas the extension was relatively stronger in winter. The water turbidity in winter was clearly higher than in summer. In the surface layer, the turbidity was generally greater than 5 FTU in winter and less than 1 FTU in summer. In the bottom layer, the turbidity was much greater than 200 FTU in winter and slightly greater than 50 FTU in summer. Moreover, the turbid water layer close to the sea floor in winter can reach into an area deeper than 50 m with a thickness of over 10 m; however, it was only limited to only 30-m-deep water with a thickness of 5 m in summer. The differences of marine sedimentary environment in the MDZFC were attributed to the seasonal variations of hydrodynamics environment, weather conditions, sediment supplies, and seasonal circulations. The results suggest that winter is the key season for particle transportation and deposition. The bottom turbid layer is the primarily channel of sediment transport, and the upwelling currents and the oceanic front systems play an important role in the sediment deposit processes and the formation of the MDZFC.
机译：在2008年12月和2009年8月，在东海内陆陆架的浙江-福建沿海（MDZFC）泥浆沉积中心进行了两次调查，以描绘水柱结构的季节性变化并分析造成变化的因素。研究结果还被用于讨论MDZFC的沉积物输送过程和形成机理。在两次调查之间，水柱结构在温度，盐度和浊度方面有很大差异。具有较高温度和盐度的夏季水体在温度方面明显分层，而在整个水柱中盐度保持恒定。分层限制了沉积物的重悬和运输。从北到南，中底水层的温度略有升高，而盐度基本保持恒定。在冬季，温度和盐度相对较低的水体垂直混合均匀。温度和盐度都从表层到底部向东（深水）和南部升高。楔形水团呈沿海上升流，夏季温度较低，盐度较高，冬季温度较高，盐度较高，从50米深的海面沿海床向陆地扩散，而冬季的延伸相对较强。冬季的水浊度明显高于夏季。在表层，冬天的浊度通常大于5 FTU，夏天的浊度小于1 FTU。在底层，冬天的浊度远大于200 FTU，夏天的浊度略大于50 FTU。此外，冬季靠近海床的浑浊水层可能会进入深度超过50m的区域，厚度超过10m;但是，夏季仅限于深度为30 m的水，厚度为5 m。 MDZFC中海洋沉积环境的差异归因于水动力环境，天气条件，沉积物供应和季节性环流的季节性变化。结果表明，冬季是颗粒运输和沉积的关键季节。底部混浊层是沉积物输送的主要渠道，上升流和海洋锋系统在沉积物沉积过程和MDZFC的形成中起着重要作用。

著录项

  • 来源
    《Ocean Dynamics》 |2013年第6期|679-690|共12页
  • 作者

    Yunhai Li; Lei Qiao; Aijun Wang; Yong Zhang; Jianyong Fang; Jian Chen;

  • 作者单位

    Third Institute of Oceanography State Oceanic Administration">(1);

    Hydrometeorology and Remote Sensing Laboratory University of Oklahoma">(2);

    Third Institute of Oceanography State Oceanic Administration">(1);

    Qingdao Institute of Marine Geology">(3);

    Third Institute of Oceanography State Oceanic Administration">(1);

    State Key Laboratory of Marine Geology Tongji University">(4);

    Third Institute of Oceanography State Oceanic Administration">(1);

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Seasonal variation; Sedimentary environment; The East China Sea; Sediment transport;

    机译：季节性变化;沉积环境;东海;泥沙输送;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号