论文部分内容阅读
对南海40个站位表层沉积中112个有孔虫样品的稳定同位素分析结果表明,δ13C值和不同属种间的同位素差值在东北和南部存在的两个低值区,与研究区及周边的营养分布格局相关,可能反映东北季风和西南季风对南海水流以及海水化学成分的影响.季风一方面为南海上层水体带来丰富的营养,另一方面也减少了上下水层之间的差异.这种影响在南北两端最为明显,向中部逐渐减弱.碳同位素在南海表层沉积中的分布格局是东亚季风的反映.
The results of stable isotope analysis of 112 foraminifera samples from surface sediments of 40 stations in the South China Sea show that the δ13C values and the difference between the isotopes of different genera in the two low-value areas in the northeast and south, Which may reflect the influence of the northeast monsoon and the southwest monsoon on the South China Sea water flow and the chemical composition of the sea water.The monsoon on the one hand brings abundant nutrients to the upper South China Sea waters and on the other hand it also reduces the difference between the upper and lower water layers. This effect is most pronounced at the northern and southern ends and gradually decreases to the central part.The distribution pattern of carbon isotopes in the surface sediments of the South China Sea is a reflection of the East Asian monsoon.