JpGU-AGU Joint Meeting 2017

講演情報

[EE] 口頭発表

セッション記号 A (大気水圏科学) » A-OS 海洋科学・海洋環境

[A-OS13] [EE] 陸域海洋相互作用

2017年5月23日(火) 13:45 〜 15:15 302 (国際会議場 3F)

コンビーナ:山敷 庸亮(京都大学大学院総合生存学館)、升本 順夫(東京大学大学院理学系研究科)、Behera Swadhin(Climate Variation Predictability and Applicability Research Group, Application Laboratory, JAMSTEC, 3173-25 Showa-machi, Yokohama 236-0001)、宮澤 泰正(独立行政法人海洋研究開発機構)、座長:升本 順夫(東京大学大学院理学系研究科)、座長:Swadhin Behera(海洋研究開発機構)

13:45 〜 14:00

[AOS13-01] How to make an ocean planet habitable

★招待講演

*佐々木 貴教1 (1.京都大学 大学院理学研究科 宇宙物理学教室)

キーワード:Earth, ocean, exoplanet, habitable

Since the first discovery in 1995, over 3,500 exoplanets have been identified so far. Some of them are known to have the similar sizes as the Earth and be located in the “habitable zones” around the central stars. These exoplanets could have water on the surface—they are called “ocean planets.” Even though we have found many ocean planets, however, we do not know whether they are really habitable or not. Earth, the only planet known to harbor life, has ocean on the surface, but the amount of water is subtle (~0.023 wt% of the Earth). Recent studies insisted that the proper amount of water—not too much, not too little—is essential to generation and evolution of life. Therefore, it is important to understand why Earth has got such a small amount of water to answer the question “how to make an ocean planet habitable?” I will review the general water supply process to terrestrial planets, and discuss the existence and observability of habitable exoplanets.