Japan Geoscience Union Meeting 2018

Session information

[EE] Evening Poster

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 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, 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)

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.

*Aki Sakuma1, Ryuji Tada1, Tomohiro Yoshida1, Hitoshi Hasegawa2, Akinori Karasuda1, Naomi Sugiura1, Hongbo Zheng3 (1.Department of Earth and Planetary Science, School of Science, the University of Tokyo, 2.Faculty of Science and Technology, the University of Kochi, 3.Research Center for Earth System Science, Yunnan University)

*Hiromichi Sakurai1, Masanobu Yamamoto1, Osamu Seki2, Takayuki Omori3, Tomonori Sato1 (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Low Temperature Research Institute, Hokkaido University, 3.The University Museum, The University of Tokyo, Japan)



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