Seasonal variation of suspended-sediment transport through the southern Bohai Strait
Seasonal variation of suspended-sediment transport through the southern Bohai Strait
复制标题
渤海海峡南部悬浮泥沙输送的季节变化
DOI：
10.1016/j.ecss.2011.03.007
复制
发表时间：
2011-07
期刊：
影响因子：
--
通讯作者：
Lei, Kun
中科院分区：
文献类型：
--
作者：
Bi, Naishuang;Yang, Zuosheng;Wang, Houjie;Fan, Dejiang;Sun, Xiaoxia;Lei, Kun
基于2006年冬、2007年夏的实测资料和多场景中分辨率成像光谱仪（MODIS）图像，研究了渤海海峡南部悬沙输运的季节变化特征及其可能的机制。利用两个季节的实测资料，采用指数经验模型从MODIS图像反演悬浮泥沙浓度。现场调查资料和MODIS反演的泥沙输移表明，渤海海峡南部的泥沙输移具有明显的季节性变化，这是由于季节性变化的温盐结构和季节性交替的季风所引起的水动力作用造成的。冬季的SSC大约是夏季的3-10倍。考虑到水通量和泥沙含量的季节变化，渤海海峡南部的年泥沙通量约为40.0 Mt/yr-1，是未考虑季节变化的估算值的4-8倍。虽然黄河在夏季的输沙量很大，但渤海海峡南部冬季的入海泥沙量（132.0Mt）约为夏季的4倍。渤海海峡南部SSF的季节变化特征表明，冬季黄河三角洲沿岸沿着强烈的再悬浮和冬季风活动引起的沿岸流沿岸输送的增强可能是冬季黄河三角洲两岸泥沙输送的主要机制。
Based on field observations made in winter 2006 and summer 2007 and on multiscene MODerate resolution Imaging Spectrometer (MODIS) imagery, the seasonal variation of suspended-sediment transport in the southern Bohai Strait and its possible mechanisms are examined. The field observations in two different seasons allow an exponential empirical model to be used to retrieve suspended-sediment concentration (SSC) from MODIS imagery. Both the field-survey data and the MODIS-derived SSC show that the sediment transport in the southern Bohai Strait has a significant seasonal variation due to the seasonally varying thermohaline structure of the water column and the hydrodynamics resulting from the seasonally alternating monsoons. The SSC in winter is approximately 3–10 times higher than in summer. Considering the seasonal variation of water flux (WF) and SSC, the annual sediment flux (SSF) through the southern Bohai Strait is estimated to be approximately 40.0 Mt yr−1, about 4–8 times previous estimates, which did not take into account seasonal variation. Although the Huanghe (Yellow River) discharges a large amount of sediment in the summer, the SSF through the southern Bohai Strait in the winter (∼32.0 Mt) is about 4 times greater than it is in the summer. The strong seasonal variability of SSF through the southern Bohai Strait indicates that strong resuspension along the coast of the Huanghe delta in winter and enhanced longshore transport by coastal currents due to winter monsoon activity might be the major mechanisms of cross-strait transport of sediment in winter.
登录
查看更多内容
DOI：
--
发表时间：
2005
期刊：
Marine Geology Letters
影响因子：
--
作者：
Li Xi-qing
通讯作者：
Li Xi-qing
影响因子：
--
作者：
D. Schoellhamer
通讯作者：
D. Schoellhamer
影响因子：
3.4
作者：
J. Warrick;L. Mertes;D. Siegel;C. Mackenzie
通讯作者：
J. Warrick;L. Mertes;D. Siegel;C. Mackenzie
影响因子：
--
作者：
Dexing Wu;Xiuquan Wan;X. Bao;L. Mu;J. Lan
通讯作者：
Dexing Wu;Xiuquan Wan;X. Bao;L. Mu;J. Lan
影响因子：
--
作者：
R. Stumpf;Johnathan R. Pennock
通讯作者：
R. Stumpf;Johnathan R. Pennock