| 摘要: |
| 利用1994年4月在东海陆架不同底质类型海域即泥质区和砂质区的水文和泥沙观测资料，分析和计算了两个站的悬浮体含量的分布、余流分布和悬浮体通量，以代表两个局部海域悬浮体含量分布和输送的特征。结果表明，在底质类型、生物活动、水动力环境和悬浮体物源各因素的影响下，两个海域的悬浮体通量和悬浮体含量垂直分布各有其特征，是东海悬浮体输送和垂直分布的两种典型类型。111站周围海域的悬浮体通量较大，上、中层水体(0–40m)中的悬浮体向东南方向输送，下层和底层的悬浮体向东北方向输送，且下层和底层的通量大于中上层；砂质区的悬浮体通量相对较小，且从表层到底层均向东北方向运移。 |
| 关键词: 悬浮体 通量 东海 底质 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重点资助项目，49136140、49676289号 |
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| SUSPENDED SEDIMENT FLUX IN SPRING ON THE EAST CHINA SEA SHELF WITH DIFFERENT SURFACE SEDIMENT TYPES |
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LEI Kun1, YANG Zuo-Sheng1, GUO Zhi-Gang1, BAI Hong2
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1.College of Marine Geosciences, Ocean University of Qingdao, Qingd ao, 266003;2.Institute of Oceanology,The Chinese Academy of Sciences,Qingdao,266071
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| Abstract: |
| Observation of suspended sediment and hydrographic investigation are carried out in two representative areas, nominally the mud area southwest of Cheju Island and the sand area on the middle shelf of the East China Sea in April 1994. Vertical distribution of residual and suspended sediment flux in two areas are calculated and compared to represent transport of suspended sediment in two areas. The results show that suspended sediment flux and vertical distribution of TSM in the mud area and in the sand area have markedly different characteristics. The differences can be explained by the effect of four factors: surface sediment type, hydrodynamics, sediment source, productivity and associated biogeochemical process. These factors affect the two areas differently and cause the difference of suspended sediment flux in two areas, the mud area has relatively large flux and suspended sediment in upper water column (above 40m in depth) is transported southeastward; lower water column (deeper than 40m in depth) in the area have a larger suspended sediment flux than the upper water column, and suspended sediment are transported northeastward. Suspended sediment flux in the sand area is less than that in the mud area, and suspended sediment in whole water column is transported northeastward. |
| Key words: Suspended sediment, Flux, the East China Sea, Surface sediment |
