[M-IS15] Paleoclimatology and Paleoceanography

[MIS15-30] Comprehensive reconstruction of coral and human memories using high spatiotemporal resolution geoscientific approaches and phenomenological reduction in drama and theatre

*Tsuyoshi Watanabe^1,2,3, Atsuko Yamazaki^2,4, Taro Komagoe², Tomoya Omata⁵, Takashi Nakamura⁵, Rena Miyazaki⁶, Megumi Yamashita⁶, SceNE Project members (1.Hokkaido University , 2.KIKAI Institute for coral reefs sciences, 3.Research Institute for Humanity and Nature, 4.Nagoya Univ.・Graduate School of Environmental Studies, 5.Tokyo Institute of Technology, 6.Seinendan)

Keywords:Coral annual bands, oxygen isotope, hydrodynamic model simulation, Drama and theatre, Phenomenological reduction, Nature and human

We demonstrate a new method for comprehensive reconstruction of coral and human memories using combined approaches by high spatiotemporal resolution geoscientific analysis on coral reefs and phenomenological reduction in drama and theatre, in order to understand the relationship of the vulnerability and resilience to environmental changes between nature and human from the past to future. Corals are surviving and adapting to drastic change in Earth’s history and create nanometer to planetary scale complex structures throughout geological time, including 1) calcification process in each individual coral polyp, 2) growing and changing morphology in coral colonies, 3) creating coral ecosystem with co-existence of different coral species and other organisms, 4) developing coral reef topography with accumulating living and dead parts of skeletons and other sedimentary materials, and 5) forming coral island and archipelago with uplifted activities and/or sea level changes. Such multi-level structures and phenomena observed in corals are resemble to those in human being with the developing processes and interaction among human individuals, communities, and societies. Both corals and human being are so far adapting and surviving with different environments. In contrast with structures and phenomena, the strategy for surviving in abrupt environmental changes seems to be very different between coral reef ecosystems and human societies. We obtained the high spatiotemporal resolution geoscientific data using by high-resolution and precision coral geochemical analysis along with coral skeletal annual bands (e.g. d¹⁸O and Sr/Ca ratio) and high-spatiotemporal hydrodynamic model simulation (Omata et al. 2023, JpGU) to compare with the community-based life histories deduced from field works and interviews with local residents, human and social science fields of scientists such as anthropologist and sociologist, and artists in Kikaijima island, Kagoshima prefecture, Japan. We generated the life-based database combined of environmental factors in climate/environmental changes and human behavior and lifestyle in local and reginal scale of social changes. We applied to use drama and theatre to synthesize all different kind of scientific and societal data, knowledge, and narratives together in drama making process. Drama is one of the oldest arts of human being and way to express the change and trouble occurred inside human individual or group with the variety of different times and places. All process of making, playing, watching, discussing, and revising the drama, could be involved different field of scientists, artists, and residents in local communities with different generations. Throughout such processes, phenomenological reduction in drama and theatre would be occurred by visualizing conditions and environments which human made their decision and the psychological and emotional structures. We evaluated the reaction and propagation in community member of sciences, artists, and residents using tracking propagation of emotion, behaver pattern and decision changes. Combined approaches using high resolution coral records and phenomenological reduction in drama and theatre would help for better understanding the relationship between nature and human in unpredictable future Earth and among people in different abilities and generation in local community scale.