DISTRIBUTION OF EFFECTIVE DENSITY OF SUSPENDED MATTERS AND THEIR INFLUENCE FACTORS IN THE SHELF AREA OF THE EAST CHINA SEA IN SUMMER
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摘要: 依据2012年6-7月在东海陆架区所取得的悬浮体、温度、盐度和叶绿素资料,探讨了该区悬浮体有效密度的分布特征及其影响因素。结果表明,研究区的悬浮体有效密度总体上表现为近岸低、外海高的分布特征。随深度的增加,近岸海域悬浮体有效密度逐渐增大,底层水体较上层水体呈现为高值;外海区悬浮体有效密度则相对稳定,底层水体较上层水体呈现为低值。研究区悬浮体有效密度的空间分布主要受到长江冲淡水、浙江沿岸上升流和海底沉积环境的影响,其中长江冲淡水和浙江沿岸上升流对该区的"叠加"影响是主要因素。Abstract: Based on the data of suspended matters, temperature, salinity and chlorophyll obtained in June and July of 2012, we discussed the distribution pattern of effective density of suspended matters and their influence factors on the shelf of the East China Sea in summer. The results show that the value of effective density of suspended matters is much higher in the offshore area than in the nearshore area. With depth increasing,the effective density of suspended matters in the nearshore area is also increased gradually and the value in the bottom water is higher than the value in its upper water; but the effective density of suspended matters in the offshore area remains relatively stable and the value in the bottom water is lower than that in the upper water. The distribution of effective density of suspended matters in the study area is chiefly affected by the Changjiang River diluted water, the coastal upwelling off Zhejiang and the submarine sedimentary environment, among which the main factor is the joint effect from the Changjiang River diluted water and the coastal upwelling off Zhejiang.
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