气候变化领域集成服务门户(CCPortal): Possible explosion crater origin of small lake basins with raised rims on Titan

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DOI	10.1038/s41561-019-0429-0
	Possible explosion crater origin of small lake basins with raised rims on Titan
	Mitri G.; Lunine J.I.; Mastrogiuseppe M.; Poggiali V.
发表日期	2019
ISSN	17520894
卷号	12 期号:10
英文摘要	The Cassini mission discovered lakes and seas comprising mostly methane in the polar regions of Titan. Lakes of liquid nitrogen may have existed during the epochs of Titan’s past in which methane was photochemically depleted, leaving a nearly pure molecular nitrogen atmosphere and, thus, far colder temperatures. The modern-day small lake basins with sharp edges have been suggested to originate from dissolution processes, due to their morphological similarity to terrestrial karstic lakes. Here we analyse the morphology of the small lake basins that feature raised rims to elucidate their origin, using delay-Doppler processed altimetric and bathymetric data acquired during the last close flyby of Titan by the Cassini spacecraft. We find that the morphology of the raised-rim basins is analogous to that of explosion craters from magma–water interaction on Earth and therefore propose that these basins are from near-surface vapour explosions, rather than karstic. We calculate that the phase transition of liquid nitrogen in the near subsurface during a warming event can generate explosions sufficient to form the basins. Hence, we suggest that raised-rim basins are evidence for one or more warming events terminating a nitrogen-dominated cold episode on Titan. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	crater; crater lake; dissolution; explosion; geomorphology; methane; phase transition; Titan
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124600
作者单位	International Research School of Planetary Sciences, Università d’Annunzio, Pescara, Italy; Dipartimento di Ingegneria e Geologia, Università d’Annunzio, Pescara, Italy; Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, United States; Carl Sagan Institute, Cornell University, Ithaca, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, United States
推荐引用方式 GB/T 7714	Mitri G.,Lunine J.I.,Mastrogiuseppe M.,et al. Possible explosion crater origin of small lake basins with raised rims on Titan[J],2019,12(10).
APA	Mitri G.,Lunine J.I.,Mastrogiuseppe M.,&Poggiali V..(2019).Possible explosion crater origin of small lake basins with raised rims on Titan.Nature Geoscience,12(10).
MLA	Mitri G.,et al."Possible explosion crater origin of small lake basins with raised rims on Titan".Nature Geoscience 12.10(2019).