Japan Geoscience Union Meeting 2016

Presentation information


Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS16] Drilling Earth Science

Thu. May 26, 2016 3:30 PM - 4:45 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Yasuhiro Yamada(Japan Agency for Marine-Earth Science and Technology (JAMSTEC), R&D Center for Ocean Drilling Science (ODS)), Minoru Ikehara(Center for Advanced Marine Core Research, Kochi University), Yusuke Suganuma(National institute of Polar Research), Kazuno Arai(Japan Agency for Marine-Earth Science and Technology), Keita Umetsu(Japan Agency for Marine Earth Science and Technology)

3:30 PM - 4:45 PM

[MIS16-P01] Drilling in the Bay of Bengal for reconstruction of the Indian summer monsoon variability

*Masanobu Yamamoto1, Yoichi Usui2, Uramoto Go-Ichiro2, Takuto Ando3, Steven Clemens4, Kuhnt Wolfgang5, Leah LeVay6, IODP Exp 353 Scientists (1.Faculty of Environmental Earth Science, Hokkaido University, 2.JAMSTEC, 3.Graduate School of Science, Hokkaido University, 4.Brown University, 5.Christian-Albrechts-Universitat zu Kiel, 6.Texas A&M University)

Keywords:Bay of Bengal, IODP Exp. 353, Indian monsoon

The Indian summer monsoon brings rainfall in the Indian Subcontinent, and the precipitated water flows mainly into the Bay of Bengal. We can, thus, understand past changes in the Indian summer monsoon variability by estimating paleosalinity and riverine sediment load in the Bay of Bengal. During IODP Exp. 353 (iMonsoon; November 2014 to January 2015), we drilled six sites in the Bay of Bengal and the Andaman Sea. Cretaceous to Quaternary pelagic sediments were retrieved at Site U1443 (Ninetyeast Ridge). Miocene to Quaternary turbidites and hemipelagites were retrieved at Site U1444 (central Bay of Bengal). Miocene to Quaternary and Middle Pleistocene hemipelagic sediments were retrieved at Sites U1445 and U1446 (Mahanadi basin off India), respectively. Miocene to Quaternary hemipelagic sediments were retrieved at Sites U1447 and U1448 (the Andaman Sea).