[M-IS06] Evolution and variability of the Tropical Monsoon and Indo-Pacific climate during the Cenozoic Era

Thu. May 29, 2025 10:45 AM - 12:15 PM 301A (International Conference Hall, Makuhari Messe)

convener:Kenji Matsuzaki(Atmosphere and Ocean Research Institute, The university of Tokyo), Takuya Sagawa(Institute of Science and Engineering, Kanazawa University), Sze Ling Ho(Institute of Oceanography, National Taiwan University), Stephen J Gallagher(University of Melbourne), Chairperson:Sze Ling Ho(Institute of Oceanography, National Taiwan University), Takuya Sagawa(Institute of Science and Engineering, Kanazawa University)

The tropical monsoon system spans the African, Indian, Australian, and East Asian Monsoons. Driven by ocean-land thermal contrasts, it interacts with the global climate system. On tectonic time scales, the uplift of the Himalayas and Tibetan Plateau has been considered a significant factor in the establishment and intensification of tropical monsoon, though its importance remains debated. Paleoclimate records suggest that monsoon evolution during the Cenozoic era was also substantially influenced by global climate changes related to changes in atmospheric CO2.
The Indo-Pacific oceanography also plays a crucial role in generating land-ocean thermal contrast and water vapor circulation. The region's West Pacific Warm Pool (WPWP), the largest heat reservoir in the global ocean, significantly contributes to atmospheric heat and moisture, influencing the El Nino-Southern Oscillation (ENSO) climate pattern. The constriction of the Indonesian Seaways during the Neogene has had a major impact on the formation of the WPWP and consequently affects ENSO dynamics. However, the precise timing and mechanism of this process are still under debate.
This session aims to assess the relative importance of these processes on different time scales, from millennial to tectonic. The goal is to enhance our understanding of the evolution of the tropical Monsoon, WPWP, and ENSO variability. It also seeks to explore the controlling factors and interactions with the global climate system. Presentations based on various archives such as piston cores, DSDP/ODP/IODP cores, and land sections are encouraged. These studies welcome a broad range of paleo-environmental proxies, including geochemistry, geophysics, sedimentology, and micropaleontology. Modeling studies are also welcome to complement the proxy-based research.

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10:45 AM - 11:00 AM

[MIS06-06] Monsoon intensity is not the dominant control of glacial-interglacial SST latitudinal patterns in the South and East China Sea

Alicia Hou^1,2, *Sze Ling Ho¹, Ru-Yun Tung¹, Shih-Yun Lin¹, Masanobu Yamamoto³, Kuo-Fang Huang⁴, Yuan-Pin Chang⁵, Min-Te Chen⁶ (1.Institute of Oceanography, National Taiwan University, 2.EPOC, University of Bordeaux, 3.Faculty of Environmental Earth Science, Hokkaido University, 4.Institute of Earth Sciences, Academia Sinica, 5.Department of Oceanography, National Sun Yat-Sen University, 6.Institute of Earth Sciences, Center of Excellence for the Oceans & Center of Excellence for Ocean Engineering, National Taiwan Ocean University)

11:00 AM - 11:15 AM

[MIS06-07] Changes in the Tsushima Warm Current System in the Japan Sea Throughout the Holocene

*Kenji Matsuzaki¹, Takuya Itaki², Takuya Sagawa³, Yoshiaki Suzuki², Tomohisa Irino⁴, Ken Ikehara² (1.Atmosphere and Ocean Research Institute, The university of Tokyo, 2.AIST, Geological Survey of Japan, Higashi 1-1-1, Tsukuba Central 7, Ibaraki 305-8567, Japan, 3.Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan, 4.Graduate School of Environmentral Science, Hokkaido University, N10W5 Sapporo Hokkaido 060-0810, Japan)

11:15 AM - 11:30 AM

[MIS06-08] Variations in paleovegetation recorded by plant-derived terpenoids in the sediments from Lake Dabusu, northeastern China, over the past 7.2 ka

*Ryosuke Fukuchi¹, Ken Sawada^2,1 (1.Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University)

11:30 AM - 11:45 AM

[MIS06-09] Reconstructing past dynamics of the East Asian Monsoon using the temperature variability derived from individual foraminifera analysis

*Pei-Ting Lee¹, Sze Ling Ho¹, Yoshimi Kubota², Keiji Horikawa³, Chuan-Chou Shen⁴, Min-Te Chen⁵ (1.Institute of Oceanography, National Taiwan University, Taipei, Taiwan, 2.Geology and Paleontology, National Museum of Nature and Science, Tsukuba, Japan, 3.Faculty of Science, Academic Assembly, University of Toyama, Toyama, Japan, 4.Department of Geosciences, National Taiwan University, Taipei, Taiwan, 5.Institute of Earth Sciences, National Taiwan Ocean University, Keelung, Taiwan)

11:45 AM - 12:15 PM

[MIS06-10] Late Quaternary tropical Indo-Pacific climate and its relation to the Australasian monsoon

★Invited Papers

*Mahyar Mohtadi¹ (1.Center for Marine Environmental Sciences, University of Bremen, Germany)

Session information