2023年5月24日(水) 15:30 〜 17:00 302 (幕張メッセ国際会議場)

コンビーナ:佐川 拓也(金沢大学理工研究域)、松崎 賢史(東京大学 大気海洋研究所)、Sze Ling Ho(Institute of Oceanography, National Taiwan University)、座長:佐川 拓也(金沢大学理工研究域)、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.