南海北部和中部硅藻通量季节性变化及其对季风气候的响应  

The influence of monsoon on seasonal changes of diatom fluxes in the northern and central South China Sea

作　　者：冉莉华[1] 郑玉龙[1] 陈建芳[1] 陈荣华[1] 郑连福[1] WIESNER Martin-G 

机构地区：[1]国家海洋局第二海洋研究所,浙江杭州310012 [2]德国汉堡大学海洋生物地球化学和海洋化学研究所,德国汉堡d20146

出　　处：《海洋学报》2011年第5期139-145,共7页

基　　金：国家自然科学基金(40676044);国家海洋局青年海洋科学基金重点项目(2010325);国家青年自然科学基金(41006034)

摘　　要：通过对南海北部和中部两套时间序列沉积物捕获器中的颗粒物样品进行硅藻分析,揭示了南海北部和中部硅藻通量的季节变化规律及其区域差异和各自对东亚季风气候的响应。研究表明在南海北部和中部海域,硅藻通量可以在一定程度上指示海洋初级生产力水平,其中南海北部硅藻通量明显低于中部,这可能与北部颗粒物样品采集期间发生的El Ni o事件有关;南海北部和中部硅藻通量均存在明显的季节性变化规律,其中东亚冬季风对南海北部海域硅藻的生长有着显著影响,而南海中部则受夏季西南季风的影响更为强烈;南海北部深层硅藻通量高于浅层,这表明南海北部可能存在较强的深层流作用。Diatom analysis of samples from sediment traps deployed in the northern and central South China Sea reveals the seasonal changes of diatom fluxes and their relationships with the East Asia monsoon system.It is shown that the diatom flux can be treated as an indicator of marine primary productivity in the northern and central South China Sea.Especial low diatom fluxes are found in the northern South China Sea,which might be related to the El ni o event during 1987-1988.In the northern South China Sea,apparent increased diatom fluxes are found during the winter monsoon period,which is correlated with stronger sea water vertical mixing and higher aeolian particles input during this period.Relatively high fluxes are also found in the deep water than in the shallow water,indicating possible deep sea lateral advection in the northern South China Sea.Higher diatom fluxes during the summer monsoon period with peak flux in late June to early July are revealed in the central South China Sea,which may be stimulated by higher nutrient input during the summer monsoon.

关 键 词：南海 硅藻 季风 沉积物捕获器 

分 类 号：P714.6[天文地球—海洋科学]