[M-IS06] [EE] Evolution and variability of Asian Monsoon and its linkage with Cenozoic global cooling

Tue. May 23, 2017 3:30 PM - 5:00 PM A09 (Tokyo Bay Makuhari Hall)

convener:Ryuji Tada(Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo), Christian Betzler(University of Hamburg), Peter Dominic Clift(Louisiana State University), Chairperson:Peter Clift(Louisiana State University), Chairperson:Kenji Matsuzaki(Department of Earth and Planetary Science, Graduate School of Science, 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.

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3:30 PM - 3:45 PM

[MIS06-06] Tropical western Pacific hydrology during the last 6000 years based on charcoal records from Borneo

*Masanobu Yamamoto¹, Takafumi Kikuchi¹, Hiromichi Sakura¹, Ryoma Hayashi², Osamu Seki³, Takayuki Omari⁴, Abdullah Sulaiman⁵, Hasrizal Bin Shaari⁶, Lurie Melling⁷ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Lake Biwa Museum, Japan, 3.Low Temperature Research Institute, Hokkaido University, Japan, 4.The University Museum, The University of Tokyo, Japan, 5.Minerals and Geoscience Department Malaysia, Malaysia, 6.Universiti Malaysia Terengganu, Malaysia, 7.Tropical Peat Research Institute, Malaysia)

3:45 PM - 4:00 PM

[MIS06-07] East Asian winter monsoon fluctuation revealed by ice-rafted debris occurrence in the northern Japan Sea

*Ken Ikehara¹ (1.Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology)

4:00 PM - 4:15 PM

[MIS06-08] Japan Sea oxygen isotope stratigraphy and monsoon signals recorded in sedimentary color variation of IODP Site U1427

★Invited papers

*Takuya Sagawa¹, Yoshitaka Nagahashi², Yasufumi Satoguchi⁶, Takuya Itaki³, Ann Holbourn⁷, Ken Ikehara³, Tomohisa Irino⁴, Ryuji Tada⁵ (1.Institute of Science and Engineering, Kanazawa University, 2.Faculty of Symbiotic Systems Science, Fukushima University, 3.Geological Survey of Japan, AIST, 4.Faculty of Environmental Earth Science, Hokkaido University, 5.Department of Earth and Planetary Science, The University of Tokyo, 6.Lake Biwa Museum, 7.Institute of Geosciences, Christian-Albrechts-University)

4:15 PM - 4:30 PM

[MIS06-09] Variations in East Asian summer monsoon in the last 400 ky deduced from results of Mg/Ca-sea surface temperature and oxygen isotope of IODP Site U1429

*Yoshimi Kubota¹, Etsuko Wakisaka², Steven Clemens³, Ann Holbourn⁴, Kyung Eun Lee⁵, Martin Ziegler⁶, Keiji Horikawa² (1.National Museum of Nature and Science, 2.University of Toyama, 3.Brown University, 4.Christian-Albrechts University, 5.Korea Maritime and Ocean University, 6.Utrecht University)

4:30 PM - 4:45 PM

[MIS06-10] Formation of the Holocene mud belt in the inner shelf of the East China Sea: controlled by changes in sea level and climate

*Xiting Liu¹ (1.Key Laboratory of Marine Geology and Environment , Institute of Oceanology , Chinese Academy of Sciences)

4:45 PM - 5:00 PM

[MIS06-11] Millennial-scale variability of East Asian summer monsoon precipitation during the last 6 kys is caused by N-S oscillation of precipitation front associated with westerly jet movement

*Ryuji Tada¹, Ke WANG¹, Keita Saito¹, Hongbo Zheng⁶, Yoshiaki Suzuki¹, Saiko Sugisaki², Kana Nagashima⁵, Masao Uchida⁷, Tomohisa Irino⁴, Takeshi Nakagawa⁸, Yoshimi Kubota³, Katsunori Kimoto⁵, Takuya Itaki² (1.Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo, 2.Geological Survey of Japan, AIST, 3.National Museum of Nature and Science, 4.Hokkaido University, 5.JAMSTEC, 6.Yunnan University, 7.National Institute for Environmental Studies, 8.Ritsumeikan University)

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