摘要
南黄海夏季表层海水中悬浮体的高值区出现在苏北近岸一带,测得的最高值为7.57mg/L,其次是长江口和调查区的北部.低值区大面积分布在调查区的中部和山东半岛以南,悬浮体含量小于0.5mg/L.远岸的悬浮体垂向分布中有一个极为明显的分层性.在长江口外的悬浮体分布中可看到台湾暖流的影响,它的存在限制了长江入海物质的向东扩散.尽管7月是黄河和长江的丰水期,大量物质被携带入海,但还未能构成悬浮体的主要来源.其主要来源是沉积物的再悬浮,其次才是河流携入的物质,海水中的生物组分居三.现代河流入海物质的影响范围主要是调查区南北两端.在深水区,温度、盐度跃层的形成限制了底层悬浮体向上扩散.海水中物质的运移主要在海水底层进行,以悬浮—沉积—再悬浮—再沉积的方式进行着物质的运移和交换.
During 1983-1984 a joint investigation of marine geology in the South Yellow Sea was conducted between the Institute of Oceanology, Academia Sinica,China and the Woods Hole Oceanographic Institute, USA. This paper is a preliminary result of the work of Chinese scientists on the suspended matter in winter.Concentration distribution of total suspened matter can be grouped into five areas. The first area is nearby the northern coast of Jiangsu province with the highest concentration of more than 200mg/L in the surface water; the second and the third areas located outside outside the mouth of Changjiang River and the east of Shandong Peninsula with a concentration of 10mg/L and 5mg/L;the central part of the sea and the area between Qingdao city and Haizhou Bay are the fourth and the fifth areas with lowest concentration of less than 2mg/L,Concentration of suspended matter (x) versus transmission of sea water (y) confirms the formula y = 82.321e-0.079x and the coefficient of correlation (k) is -0.88. So it's easy to obtain the concentration of suspended matter if there is no data of concentration in some points.Microscope datum indicated that the major component of suspended matter consist of terrigenous detrital with finer grain size and coarer biogenetic materials.In the high concentration area the noncombustible portion accounts for about 70-90% or more in total weight and in the low concentration area it is less than 50%. The source of suspended matter is mainly the resuspended matter of sediments,discharges the of rivers is next, the biogenetic material is the least. As for as our inforomation goes,after 2-3 days of wind with 8-9 force the concentration of suspended matter increased 3-7 times in same places.
出处
《海洋学报》
CAS
CSCD
北大核心
1990年第6期749-757,T001,共10页
