Sedimentology of the Okhotsk Sea ...

• Main Authors: Nürnberg, Dirk, Tiedemann, Ralf
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2004
• Subjects: Gravity corer; Giant piston corer; LV28; MD122; Akademik M.A. Lavrentyev; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Kurile-Okhotsk Sea Marine Experiment KOMEX; okhotsk sea; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.742366; https://doi.pangaea.de/10.1594/PANGAEA.742366

On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record (China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to high-productivity events. Marine productivity was strengthened during glacial terminations because of an effective nutrient utilization at times of enhanced water column stratification and high nutrient supply from fluvial runoff and sea ice thawing. During ... : Supplement to: Nürnberg, Dirk; Tiedemann, Ralf (2004): Environmental change in the Sea of Okhotsk during the last 1.1 million years. Paleoceanography, 19(4), PA4011 ...