[U-08] Biogeochemistry of CO world

Sun. May 21, 2023 9:00 AM - 10:15 AM Exhibition Hall Special Setting (1) (Exhibition Hall 8, Makuhari Messe)

convener:Yuichiro Ueno(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Norio Kitadai(Japan Agency for Marine-Earth Science and Technology), Shino Suzuki(Japan Aerospace Exploration Agency), Kazumi Ozaki(Tokyo Institute of Technology), Chairperson:Yuichiro Ueno(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Kazumi Ozaki(Tokyo Institute of Technology)

In this session, we will discuss the impact of carbon chemical species (CO2/CO/CH4) on the planetary evolution, prebiotic chemistry, and biological metabolism with the ultimate goal of elucidating the planetary setting suitable for the origin of life. Following astronomical observations and planetary explorations identifying a growing number of extraterrestrial bodies that are potentially capable of sustaining life, search for lives in Universe has already begun. However, the fundamental question; What planetary conditions are crucial for the emergence of life remains unsolved. In particular, although carbon monoxide (CO) must have been an abundant atmospheric component on the early Earth and Mars, its role in prebiotic and early metabolic processes are not well understood. Here, we seek for diverse research subjects on these topics. We also welcome discussions on future exploration of extraterrestrial lives based on the CO world concept.

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9:00 AM - 9:15 AM

[U08-01] Conditions required for the CO runaway on the early Earth

*Kazumi Ozaki¹, Yasuto Watanabe^2,3 (1.Tokyo Institute of Technology, 2.The University of Tokyo, 3.Japan Meteorological Agency)

9:15 AM - 9:30 AM

[U08-02] Behaviors of primitive marine ecosystems and atmospheric CO under a reduced atmosphere with an organic haze layer

*Yasuto Watanabe^1,2, Eiichi Tajika¹, Kazumi Ozaki³, Peng K. Hong⁴ (1.Graduate School of Science, The University of Tokyo, 2.Meteorological Research Institute, 3.Tokyo Institute of Technology, 4.Chiba Institute of Technology)

9:30 AM - 9:45 AM

[U08-03] UV shielding by hydrocarbons in an early reduced Earth's atmosphere

*Tatsuya Yoshida¹, Shungo Koyama¹, Yuki Nakamura¹, Naoki Terada¹, Kiyoshi Kuramoto² (1.Tohoku University, 2.Hokkaido University)

9:45 AM - 10:00 AM

[U08-04] Carbon and Oxygen isotope ratio in CO in the Martian atmosphere observed by TGO/NOMAD

*Kimie Shiobara¹, Shohei Aoki^2,3, Nao Yoshida¹, Hiromu Nakagawa¹, Naoki Terada¹, Yasumasa Kasaba¹, Isao Murata¹, Tatsuya Yoshida¹, A. C. Vandaele³, L. Trompet³, G. Liuzzi⁴, I. R. Thomas³, G. L. Villanueva⁵, M. A. Lopez-Valverde⁶, A. Brines⁶, M. R. Patel⁷, S. Faggi^5,8, F. Daerden³, J. T. Erwin³, B. Ristic³, G. Bellucci⁹, J. J. Lopez-Moreno⁶, Hiroyuki Kurokawa¹⁰, Yuichiro Ueno¹⁰ (1.Tohoku University, 2.The University of Tokyo, 3.Royal Belgian institute for space aeronomy, 4.Scuola di Ingegneria, Universita degli Studi della Basilicata, 5.NASA Goddard Space Flight Center, 6.Instituto de Astrofisica de Andalucia, Glorieta de la Astronomia, 7.School of Physical Sciences, The Open University, 8.American University, 9.Istituto Nazionale di Astrofisica, 10.Tokyo Institute of Technology)

10:00 AM - 10:15 AM

[U08-05] Isotopic insights into source and sink of CO in early Martian atmosphere

*Yuichiro Ueno^1,2,3, Johan Schmidt⁴, Matthew S Johnson⁴ (1.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2.Earth-Life Science Institute, Tokyo Institute of Technology, 3.Japan Agency for Marine-Earth Science and Technology, 4.University of Copenhagen)

Session information