[M-IS02] Evolution and variability of the Asian Monsoon and Indo-Pacific climate during the Cenozoic Era

Wed. May 24, 2023 3:30 PM - 5:00 PM 302 (International Conference Hall, Makuhari Messe)

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

The Asian Monsoon (AM) is an inter-hemispheric atmospheric system driven by the thermal contrast between ocean and land. It interacts with the global climate system via several processes. On tectonic time-scales, the uplift of Himalaya and Tibetan Plateau (HTP) has been considered an important player in the establishment and intensification of the Asian monsoon, but its importance is still debatable. On the other hand, comparison of regional and global paleoclimate records suggests that AM evolution during the Cenozoic is significantly affected by global climate changes most likely through pCO2. In addition, Indo-Pacific oceanic climate condition is also essential for the land-ocean thermal contrast as well as water vapor circulation because these areas have the largest heat content in the global ocean and supply a large amount of heat and moisture to the atmosphere, which cause warm and cool phases of a recurring climate pattern across the tropical Pacific, the El Nino-Southern Oscillation (ENSO).
In this session, we seek to disentangle and determine the relative importance of the above-mentioned processes on different time-scales. This will improve our understanding of the evolution of AM, ENSO and Indo-Pacific in terms of the mean climate state and variability from millennial to tectonic time-scale, as well as their controlling factors, and their interaction with the global climate system. Presentations based on various archives such as piston cores, DSDP/ODP/IODP cores as well as land sections relying on a wide panel of paleo-environmental proxy are welcome (e.g., geochemistry, geophysics, sedimentology, micropaleontology as well as modeling studies). Studies on calibration and evaluation of proxy and comparison of multiproxy approach are also welcome. We also welcome presentations from older time periods such as the Mesozoic and Paleozoic that shed light on the evolution of the monsoon system during the Phanerozoic.

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3:30 PM - 3:45 PM

[MIS02-05] Monsoon seasonality affecting Indian vegetation over the last 1.46 million years

*Masanobu Yamamoto¹, Steven C Clemens² (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Earth, Environmental and Planetary Sciences, Brown University)

3:45 PM - 4:00 PM

[MIS02-06] Occurrence of IOD-like long-term transition in the NE tropical Indian Ocean during the mid-Brunhes dissolution interval

*Hiroyuki Takata¹, Boo-Keun Khim², Kiseong Hyeong³, Inha Seo⁴, Youngsook Huh⁵, Hirofumi Asahi⁶, Jongmin Lee⁷, Koji Seto⁸ (1.Institute of Geologic Hazard and Industrial Resources, 2.Department of Oceanography, Pusan National University, 3.Global Ocean Research Center, Korean Institute of Ocean Science and Technology, 4.Department of Earth and Environmental Sciences, Jeonbuk National University, 5.School of Earth and Environmental Sciences, Seoul National University, 6.Center for Advanced Marine Core Research, Kochi University, 7.Deep-sea Mineral Resources Research Center, Korea Institute of Ocean Science and Technology, 8.Estuary Research Center, Shimane University)

4:00 PM - 4:15 PM

[MIS02-07] Radiolarians based Sea Surface Temperature estimates in the Northwest Pacific: suitability and potential limits

*Kenji Matsuzaki¹, Takuya Itaki², Kyung Eun Lee³, Yoshimi Kubota⁴, Takuya Sagawa⁵, Keiji Horikawa⁶, Masafumi Murayama⁷ (1.Atmosphere and Ocean Research Institute, The university of Tokyo, 2.AIST, Geological Survey of Japan, 3.Division of Marine Environment and Bioscience, Korea Maritime University, 4.Geology and Paleontology, National Museum of Nature and Science, 5.Faculty of Geosciences and Civil Engineering, Institute of Science and Engineering, Kanazawa University, 6.Faculty of Science, Academic Assembly, University of Toyama, 7.Faculty of Agriculture and Marine Science, Department of Marine Resource Science, Kochi University)

4:15 PM - 4:30 PM

[MIS02-08] Hemispherically asymmetric trade wind changes in the Indo-Pacific region drive subsurface temperature evolution over the past ~25 kyr

*Alicia Meng Xiao Hou¹, Sze Ling Ho¹, Ren Yi Ooi¹, AiLin Chen¹, Kuo-Fang Huang², Yuan-Pin Chang³, Min-Te Chen⁴, Chuan-Chou Shen¹, Yu-Heng Tseng¹, Yi-Chun Kuo¹ (1.National Taiwan University, 2.Academia Sinica, 3.National Sun Yat-Sen University, 4.National Taiwan Ocean University)

4:30 PM - 4:45 PM

[MIS02-09] Contrasting vertical distributions of recent planktic foraminifera off Indonesia during the southeast monsoon: implications for paleoceanographic reconstructions

*Raul Tapia¹, Sze Ling Ho¹, Hui-Yu Wang², Jeroen Groeneveld¹, Mahyar Mohtadi³ (1.Institute of Oceanography, National Taiwan University, Taipei, Taiwan, 2.Biodiversity Research Center, Academia Sinica, Taipei, Taiwan, 3.MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany)

4:45 PM - 5:00 PM

[MIS02-10] Reconstruction of paleovegetation changes using plant terpenoids in sediments from Lake Suwa (central Japan) since the last glacial period

*Ryosuke Fukuchi¹, Ken Sawada^1,2, Hiroyasu Asahi¹, Nozomi Hatano³ (1.Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 3.Natural Environment Division, Nagano Environmental Conservation Research Institute)

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