Recent achievements and future perspectives of paleoenvironmental studies

Yasufumi IRYU

Presentation information

Oral

Symbol U (Union) » Union

[U-06] Evolution of New Seamless Science: From Space, Sun to the Earth Surface

Sun. May 24, 2015 11:00 AM - 12:45 PM 105 (1F)

Convener:*Yutaka Matsumi(Solar-Terrestrial Environment Laboratory, Nagoya University), Kanya Kusano(Solar-Terrestrial Environment Laboratory, Nagoya University), Joji Ishizaka(Hydrospheric Atmospheric Research Center, Nagoya University), Kazuhisa Tsuboki(Hydrospheric Atmospheric Research Center, Nagoya University), Masaki Enami(Center for Chronological Research, Nagoya University), Chair:Akira Mizuno(Solar-Terrestrial Environment Laboratory, Nagoya University), Kazuo Shiokawa(Solar-Terrestrial Environment Laboratory, Nagoya University)

11:20 AM - 11:40 AM

★ [U06-08] Recent achievements and future perspectives of paleoenvironmental studies

*Yasufumi IRYU¹ (1.Graduate School of Science, Tohoku University)

Keywords:Paleoenvironment, sediment, skeleton, shell

Recent progress in geochemical analysis enables reconstruction of a variety of environments using sediment as well as biogenic skeleton/shells. The reconstructed environments range from local conditions such as temperature, salinity and pH to global phenomena including frequency and intensity of El Nino and southern oscillation (ENSO), Indian Ocean Dipole (IOD), and Pacific Decadal Oscillation (PDO). An extraterrestrial effect (solar activity) to earth’s climate and ecosystem can be delineated as well. It is possible to detect artificial environmental changes such as the shifts in carbon isotope composition in oceans owing to anthropogenic activities and the spreading of radioactive elements created atmospheric nuclear weapons testing. These indicate that the paleoenvironmental studies using biogenic skeleton/shells and sediment is typical of seamless science. This presentation overviews recent achievements and future perspectives of the paleoenvironmental studies.