High resolution paleoceanographic change of cyrosphere by Optically Stimulated Luminescence(OSL) dating

海洋沉积物岩心的精确测年对于高分辨率重建过去的环境变化是至关重要的。在这项研究中，我们介绍了一种新的海洋沉积物岩心的光激发发光(OSL)测年方法，该方法来自高纬度地区，那里的测年相对困难，因为碳酸盐稀有或不存在。鄂霍次克海西南部25kyr的OSL测年结果与放射性碳测年结果一致。鄂霍次克海中部包括末次间冰期在内的130个年间的OSL测年结果与氧同位素地层学一致。这些结果使我们无法获得高分辨率古海洋学的宝贵年代。

Precious dating of marine sediment core is essential for high-resolution reconstructionof the past environmental change. In this study, we introduced a new method ofoptically stimulated luminescence(OSL) dating on marine sediment cores obtainedfrom high latitude area where dating is relatively difficult because carbonate is rare orabsent. The OSL dating during 25 kyrs of the core from south-western Okhotsk Sea isconsistent with radiocarbon dating. The OSL dating during130 kyrs including the lastinterglacial period for the central Okhotsk Sea is consistent with oxygen isotopestratigraphy. These results unable us to obtain precious dating for high resolutionpaleoceanography.