南海北部1987～1988年颗粒物质和硅藻通量的季节性变化:季风气候与 El Nino的响应

南海北部1987年9月～1988年10月沉积物捕获器中颗粒物质和硅藻通量的季节性变化受到季风气候的控制.颗粒物质与硅藻在东北和西南季风盛行期增加,在季风转变期减少.浅层和深层的颗粒总通量、蛋白石通量、碳酸钙通量、蛋白石/颗粒总通量比值、碳酸钙/颗粒总通量比值、有机碳/磷的比值以及浅层硅藻Thalassionema nitzschioides、Coscinodiscus excentricus、Coscinodiscus nodulifer、Nitzschia marina和Rhizosolenia bergonii的通量在东北季风期间明显地增加了,这些变化可能与1987年～1988年发生的EINino事件相关.

SEASONAL VARIATIONS OF PARTICULATE MATTER AND DIATOM FLUXES IN THE NORTHERN SOUTH CHINA SEA DURING 1987～1988: MONSOON CLIMATE AND El Nino RESPONSES

Seasonal variations of particulate matter and diatom fluxes in the northern South China Sea during 1987-1988 were overwhelmingly controlled by monsoon climate. Particulats matter and diatom fluxes increased obviously during the Northeast (November to February) and Southwest (June to September) monsoons and decreased during the transition periods between the monsoons. Particulate matter, opal, and carbonate fluxes and opal/particulate matter, carbonate/particulate matter, organic carbon/ phosphate ratios at the shallow and deep traps enhanced anomalously during the Northeast monsoon (November 1987-Febuary 1988), and five species fluxes (Thalassionema nitzschioides, Coscinodiscus excentricus, Coscinodiscus nodulifer, Nitzschia marina and Rhizosolenia bergonii) at the shallow trap also increased abnormally during this time, which might be attributable to the El Ni o event during the period of 1987-1988.