Paleocenographic study of piston cores collected from the Ryukyu Trench slope

利用22个柱状岩心研究了琉球岛弧周围晚第四纪古海洋学。特别是琉球海沟南坡的岩心，包含了最大时约32万年来海洋变化的连续信息。这些岩心的综合研究（包括稳定的浮游氧同位素、钙质纳米浮游生物、浮游有孔虫、沉积学和沉积年代地层学）揭示了琉球岛弧地区（即黑潮源区）古海洋学变化的许多新事实。详情请参考我们在国际期刊上发表或出版的论文。

Late Quaternary paleooceanography around the Ryukyu Island Arc is studied depending on 22 piston cores. Particularly, the cores from the southern Ryukyu Trench slope contain continuous informations on the oceanographic changes for the past ca. 320,000 years at the maximum. Synthetic study (included stable planktonic oxygen isotope, calcareous nannoplankton, planktonic foraminiferal, sedimentologic, and tephrochronologic stratigraphies) of these cores reveals many new facts concerning the paleoceanographic changes of the Ryukyu Island Arc region, i. e. source region of the Kuroshio Current. For the details, our papers published or in press on the international journals are to be referred.