Japan Geoscience Union Meeting 2018

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[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS01] Evolution and variability of Asian Monsoon and its linkage with Cenozoic global cooling

Mon. May 21, 2018 1:45 PM - 3:15 PM 201A (2F International Conference Hall, Makuhari Messe)

convener:Masanobu Yamamoto(Faculty of Environmental Earth Science, Hokkaido University), Ryuji Tada(Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo), Chairperson:Yamamoto Masanobu(Hokkaido University), Tada Ryuji(The University of Tokyo), Irino Tomohisa, Matsuzaki Kenji(The University of Tokyo)

Although Asian Monsoon (AM) is a regional phenomenon, it exerts a significant impact on the global climate. Since uplift of Himalaya and Tibetan Plateau (HTP) has been considered to have played a significant role on the establishment and intensification of AM, numerous attempts have been made to prove the linkage between the HTP uplift and AM evolution, but the linkage is largely unproved till now. On the other hand, comparison of global climatic changes, pCO2 reconstructions, and AM evolution process during Cenozoic suggests that AM evolution is significantly affected by global climate changes most likely through pCO2. Thus, importance of the HTP uplift on AM evolution is questioned. However, it should be noted that the effects of the HTP uplift and AM precipitation on chemical weathering, erosion, and CO2 uptake could be acting as feedback loops on AM-HTP uplift linkage.

From July 2013 to November 2016, IODP conducted a series of expeditions such as 346 (Asian Monsoon), 353 (Indian Monsoon Rainfall), 354 (Bengal Fan), 355 (Arabian Monsoon), 356 (Indian through-flow), and 359 (Maldives Monsoon) that are related to AM evolution and its interaction with global climate system in NW Pacific and Indian Ocean regions, and exciting results are gradually coming out. We believe it is timely to start gathering and synthesizing the results of these cruises and update and exchange information and ideas to promote our understanding of AM evolution, variability, their controlling factors, and their interaction with global climate system during the Cenozoic.

1:45 PM - 2:00 PM

[MIS01-01] Distinctly light layers in the Quaternary sediments of the Japan Sea as a possible indicator of millennial-scale variability of East Asian winter monsoon

*Ryuji Tada1, Arisa Seki1, Masafumi MURAYAMA2, Ken Ikehara3, Masayuki Ikeda4 (1.Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo, 2.Department of Marine Resource Science, Faculty of Agruculture and Marine Science, Kochi University, 3.Geological Survey of Japan, AIST, 4.Department of Earth Sciences, Faculty of Science, Shizuoka University)

2:00 PM - 2:20 PM

[MIS01-02] Precession-band variance missing from East Asian monsoon runoff

★Invited Papers

*Steven C Clemens1, Ann Holbourn2, Yoshimi Kubota3, Kyung Eun Lee4, Zhengyu Liu5, Guangshan Chen6, Arin Nelson1, Baylor Fox-Kemper1 (1.Earth, Environmental and Planetary Sciences, Brown University, Providence, RI USA. , 2.Institute of Geosciences, Christian-Albrechts-University, Kiel, Germany, 3.Geology and Paleontology, National Museum of Nature and Science, Tsukuba, Japan, 4.Ocean Science, Korea Maritime and Ocean University, Busan, South Korea, 5.Atmospheric Sciences, The Ohio State University, Columbus, OH, USA, 6.Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China.)

2:20 PM - 2:35 PM

[MIS01-03] The Eccentricity cycle forcing (100 & 400 kyr) during the late Miocene in the Japan Sea and its impact of the local paleoceanography, evidence from data of radiolarians and sediment physical properties (IODP Expedition 346 Site U1425)

*Kenji Marc Raymond Matsuzaki1, Shunsuke Kurokawa1, Ryuji Tada1, Takuya Itaki2 (1.Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, 2.Geological Survey of Japan, AIST, Marine Geology Research Group/ Institute of Geology and Geoinformation)

2:55 PM - 3:15 PM

[MIS01-05] Sensitivity of Australian monsoon to changing climate boundary conditions during the late Miocene and across the Mid-Pleistocene Transition

★Invited Papers

*Ann E Holbourn1, Yair Rosenthal2, Denise Kulhanek3, Danny Elsner1, Sebastian Beil1, Janika Joehnck1, Julia Luebbers1, Wolfgang Kuhnt1, IODP Expedition 363 Scientists (1.University of Kiel, 2.Rutgers University, 3.International Ocean Discovery Program, Texas A&M University)

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