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DOI | 10.1038/s41561-019-0369-8 |
Pluto's ocean is capped and insulated by gas hydrates | |
Kamata, Shunichi1,8; Nimmo, Francis2; Sekine, Yasuhito3; Kuramoto, Kiyoshi4; Noguchi, Naoki5; Kimura, Jun6; Tani, Atsushi7 | |
2019-06-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:6页码:407-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA |
英文摘要 | Many icy Solar System bodies possess subsurface oceans. On Pluto, Sputnik Planitia's location near the equator suggests the presence of a subsurface ocean and a locally thinned ice shell. To maintain an ocean, Pluto needs to retain heat inside. On the other hand, to maintain large variations in its thickness, Pluto's ice shell needs to be cold. Here we show, by thermal evolution and viscous relaxation calculations, that the presence of a thin layer of clathrate hydrates (gas hydrates) at the base of the ice shell can explain both the long-term survival of the ocean and the maintenance of shell thickness contrasts. Clathrate hydrates act as a thermal insulator, preventing the ocean from completely freezing while keeping the ice shell cold and immobile. The most likely clathrate guest gas is methane, derived from precursor bodies and/or cracking of organic materials in the hot rocky core. Nitrogen molecules initially contained and/or produced later in the core would probably not be trapped as clathrate hydrates, instead supplying the nitrogen-rich surface and atmosphere. The formation of a thin clathrate hydrate layer cap to a subsurface ocean may be an important generic mechanism to maintain long-lived subsurface oceans in relatively large but minimally heated icy satellites and Kuiper belt objects. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469459600005 |
WOS关键词 | STAGNANT LID CONVECTION ; SPUTNIK PLANITIA ; CLATHRATE HYDRATE ; THERMAL EVOLUTION ; METHANE HYDRATE ; WATER ; SOLAR ; ICE ; RHEOLOGY ; AMMONIA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/183927 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Hokkaido Univ, Creat Res Inst, Sapporo, Hokkaido, Japan; 2.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 3.Tokyo Inst Technol, Earth Life Sci Inst, Tokyo, Japan; 4.Hokkaido Univ, Dept Cosmosci, Sapporo, Hokkaido, Japan; 5.Tokushima Univ, Grad Sch Technol Ind & Social Sci, Tokushima, Japan; 6.Osaka Univ, Dept Earth & Space Sci, Toyonaka, Osaka, Japan; 7.Kobe Univ, Dept Human Environm Sci, Kobe, Hyogo, Japan; 8.Hokkaido Univ, Dept Earth & Planetary Sci, Sapporo, Hokkaido, Japan |
推荐引用方式 GB/T 7714 | Kamata, Shunichi,Nimmo, Francis,Sekine, Yasuhito,et al. Pluto's ocean is capped and insulated by gas hydrates[J]. NATURE GEOSCIENCE,2019,12(6):407-+. |
APA | Kamata, Shunichi.,Nimmo, Francis.,Sekine, Yasuhito.,Kuramoto, Kiyoshi.,Noguchi, Naoki.,...&Tani, Atsushi.(2019).Pluto's ocean is capped and insulated by gas hydrates.NATURE GEOSCIENCE,12(6),407-+. |
MLA | Kamata, Shunichi,et al."Pluto's ocean is capped and insulated by gas hydrates".NATURE GEOSCIENCE 12.6(2019):407-+. |
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