@article{oai:nipr.repo.nii.ac.jp:00016490,
 author = {Thena, Thulasi and Mohan, Kuppusamy and Prakasam, Muthusamy and Saravanan, Kothandaraman},
 journal = {Polar Science},
 month = {Jun},
 note = {A total of 362 marine core samples from 200 meters below the sea-floor (mbsf) were examined through the International Ocean Drilling Program (IODP), Hole U1325B, Northern Cascadia Margin. The diversity parameters increased at ~200 mbsf during the Early Middle Pleistocene Transition (EMPT) period and gradually decreased towards ~165 mbsf. The diversity pattern is also notable, which projects the termination of EMPT due to increased orbital cyclicity (~41,000 to ~100,000 years). The δ18O (Uvigerina peregrina) at regular intervals ~150 mbsf, ~110 mbsf, ~50 mbsf and ~20 mbsf certainly agrees with the abundance of Cibicides wuellerstorfi, indicating the intrusion of California Cold Current in the region. The relative abundance rate of Cassidulina laevigata inversely proportional to the peaks of C. wuellerstorfi strongly indicating the circulation of Alaskan warm current in the Cascadia Margin. The paleoproductivity and oxygenation proxies strongly suggest the maximum primary productivity throughout ~85 mbsf towards the recent interval and the study region are showing oxic to suboxic environment further, the correlation matrix and the principal component phenomenon also strongly mirror the relationship and driving factors of the paleoceanographic condition. The present study aimed to understand the connections between each proxy liable to the paleoceanographic and paleoproductivity changes during the Early-Middle Pleistocene, Northern Cascadia Margin.},
 title = {Early-Middle Pleistocene productivity changes of the Northern Cascadia Margin, Pacific Ocean},
 volume = {28},
 year = {2021}
}