| 摘要: |
| 渤海海峡是渤黄海物质交换的重要通道, 同时也是黄河入海泥沙向黄海搬运的必经路径。本文以2006-2009年渤海海峡8个站位四个季节的悬浮体、CTD数据为基础, 将标准层悬浮体浓度数据与浊度数据对比获得高垂直分辨率的悬浮体浓度数据, 分析其季节变化特征, 并结合日均风场驱动的高精度数值模型模拟的渤海海峡流场, 计算了四个季节渤海海峡悬浮体通量。结果表明, 北黄海冷水团的入侵和退缩是渤海海峡温盐及其季节变化的重要特征之一, 四季节流场特征均为"北进南出"; 渤海海峡中上层悬浮体浓度分布为海峡南部浓度高、北部浓度低, 夏季海峡北部下层北黄海冷水团控制海域悬浮体浓度高于周围水体。春季、夏季、秋季、冬季悬浮体浓度依次增高。观测期间渤海海峡悬浮体的年净通量约为251.63万吨, 其中输往黄海方向的悬浮体通量约占黄河年平均输沙量的4.27%。 |
| 关键词: 悬浮体 通量 季节变化 渤海海峡 |
| DOI：10.11693/hyhz20150700202 |
| 分类号: |
| 基金项目:山东省优秀中青年科学家科研奖励基金项目, BS2012HZ022号; 国家自然科学基金项目, 41476030号, 40906025号, 41576004号, 41276013号; 中国地质调查局海洋地质专项项目, GZH201100203号; 国家重点基础研究发展计划(973)项目, 2005CB422304号。 |
附件 |
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| DISTRIBUTION, FLUX AND SEASONAL VARIATION OF SUSPENDED PARTICULATE MATTERS IN THE BOHAI STRAIT |
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LI Ai-Chao1,2, QIAO Lu-Lu1,2, WAN Xiu-Quan3, MA Wei-Wei3
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1.College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;2.Key Laboratory of Sea Floor Science and Exploration Technique, Ocean University of China, Qingdao 266100, China;3.College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| Bohai Strait is an important channel for material exchange between the Bohai Sea and the Yellow Sea, and the only pathway of sediment transportation from the Huanghe (Yellow) River mouth to the Yellow Sea. We studied the suspended particulate matter distribution, flux, and the seasonal variations in the Bohai Strait, for which suspended sediment concentration (SSC) measured by water sample filtration, water temperature, salinity and turbidity observed by CTD at eight stations in the Bohai Strait in four seasons were used, and a three-dimensional high-accuracy numerical modeling was conducted. Results show that the intrusion and retreat of the Northern Yellow Sea Cold Water (NYSCW) were the important factors controlling the regional temperature and salinity distributions in the Bohai Strait. The regional current pattern could be described as "north-in-south-out" of the strait in all seasons. In the middle and upper layers, SSC was higher in the southern and lower in the northern parts of the strait. In summer, the bottom water in the northern strait was controlled by the NYSCW, where the SSC was higher above those the surroundings. SSC of the Bohai Strait increased in turn from spring, summer, autumn, to winter. In addition, the annual averaged net sediment flux in the strait was about 2.5163 million tons, among which the sediments transported to the Yellow Sea accounted for about 4.27% of the total sediment discharged from Huanghe River. |
| Key words: suspended particulate matter flux seasonal variation Bohai Strait |
