Oceanographic investiations from the Sea of Ochotsk

The Sea of Okhotsk is a marginal sea of the Pacific Ocean, which is characterized by strong variations in the productivity and sediment supply due to sea ice transport and river input. Furthermore the variations in the hydrological cycle determine the formation of the SOIW (Sea of Okhotsk Intermediate Water) which plays an important role in the ventilation processes in the intermediate water of the N-Pacific. Isotope data measured on planktonic and benthic foraminifera, sedimentological and geochemical studies of sediment cores and surface samples from the Sea of Okhotsk are used to reconstruct the paleoceanography during the past 350.000 years. The dating and correlation of the sediments are based on oxygen isotope stratigraphy, absolute ages, magnetic susceptibility as well as a detailled tephrachronology of the entire basin. The sedimentation rates are characterized by temporal and spatial variations. […]

鄂霍次克海是太平洋的边缘海，其生产力及沉积物供应因海冰运输和河流输入而呈现出显著变化。此外，水文循环的变化决定了鄂霍次克海中间水（SOIW）的形成，而SOIW在北太平洋中间水的通风过程中扮演着至关重要的角色。通过对浮游有孔虫和底栖有孔虫的稳定同位素数据、鄂霍次克海沉积岩心和表层样品的沉积学及地球化学研究，我们得以重建过去350,000年间的古海洋学。沉积物的年代测定和相关性分析基于氧同位素地层学、绝对年代、磁化率以及整个盆地详细的火山灰年代学。沉积速率表现出时间和空间上的变化。