IOCAS-IR
Properties of coarse particles in suspended particulate matter of the North Yellow Sea during summer
ZHANG Kainan; WANG Zhenyan; LI Wenjian; YAN Jun
发表期刊Journal of Oceanology and Limnology
ISSN2096-5508
2019-01-15
出版年2019
卷号v.37期号:01页码:81-94
文献类型CNKI期刊论文
摘要Fine particles in seawater commonly form large porous aggregates. Aggregate density and settling velocity determine the behavior of this suspended particulate matter(SPM) within the water column.However, few studies of aggregate particles over a continental shelf have been undertaken. In our case study, properties of aggregate particles, including size and composition, over the continental shelf of the North Yellow Sea were investigated. During a scienti?c cruise in July 2016, in situ ef fective particle size distributions of SPM at 10 stations were measured, while temperature and turbidity measurements and samples of water were obtained from surface, middle, and bottom layers. Dispersed and inorganic particle size distributions were determined in the laboratory. The in situ SPM was divided into(1) small particles(<32 μm),(2) medium particles(32–256 μm) and(3) large particles(>256 μm). Large particles and medium particles dominated the total volume concentrations(VCs) of in situ SPM. After dispersion, the VCs of medium particles decreased to low values(<0.1 μL/L). The VCs of large particles in the surface and middle layers also decreased markedly, although they had higher peak values(0.1–1 μL/L). This suggests that almost all in situ medium particles and some large particles were aggregated, while other large particles were single particles. Correlation analysis showed that primary particles <32 μm in?uenced the formation of these aggregates. Microscopic examination revealed that these aggregates consisted of both organic and inorganic ?ne particles, while large particles were mucus-bound organic aggregates or individual plankton.The vertical distribution of coarser particles was clearly related to water strati?cation. Generally, medium aggregate particles were dominant in SPM of the bottom layer. A thermocline blocked resuspension of?ne material into upper layers, yielding low VCs of medium-sized aggregate particles in the surface layer.Abundant large biogenic particles were present in both surface and middle layers.
关键词suspended particulate matter(SPM) coarse particles,aggregates North Yellow Sea laser in situ scattering and transmissometery(LISST)
CNKI专辑号A;
CNKI专辑名称基础科学;
CNKI专题号A010;A011;
CNKI专题名称海洋学;地质学;
分类号P736.21
收录类别中科院核心 ; 中科院扩展
语种英文;
资助项目(基金)Supported by the National Natural Science Foundation of China(No.41476045) ; the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA11030103)
文献类型CNKI期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/188670
专题中国科学院海洋研究所
作者单位1.CASKeyLaboratoryofMarineGeologyandEnvironment,InstituteofOceanology,ChineseAcademyofSciences
2.UniversityofChineseAcademyofSciences
3.LaboratoryforMarineMineralResources,QingdaoNationalLaboratoryforMarineScienceandTechnology
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ZHANG Kainan,WANG Zhenyan,LI Wenjian,et al. Properties of coarse particles in suspended particulate matter of the North Yellow Sea during summer. 2019.
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