气候变化领域集成服务门户(CCPortal): Long-term drying of Mars by sequestration of ocean-scale volumes of water in the crust

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DOI	10.1126/science.abc7717
	Long-term drying of Mars by sequestration of ocean-scale volumes of water in the crust
	Scheller E.L.; Ehlmann B.L.; Hu R.; Adams D.J.; Yung Y.L.
发表日期	2021
ISSN	0036-8075
起始页码	56
结束页码	62
卷号	372 期号:6537
英文摘要	Geological evidence shows that ancient Mars had large volumes of liquid water. Models of past hydrogen escape to space, calibrated with observations of the current escape rate, cannot explain the present-day deuterium-to-hydrogen isotope ratio (D/H). We simulated volcanic degassing, atmospheric escape, and crustal hydration on Mars, incorporating observational constraints from spacecraft, rovers, and meteorites. We found that ancient water volumes equivalent to a 100 to 1500 meter global layer are simultaneously compatible with the geological evidence, loss rate estimates, and D/H measurements. In our model, the volume of water participating in the hydrological cycle decreased by 40 to 95% over the Noachian period (~3.7 billion to 4.1 billion years ago), reaching present-day values by ~3.0 billion years ago. Between 30 and 99% of martian water was sequestered through crustal hydration, demonstrating that irreversible chemical weathering can increase the aridity of terrestrial planets. © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works
英文关键词	chemical weathering; crust; deuterium; hydration; hydrogen isotope; hydrological cycle; isotopic ratio; Mars; Article; astronomy; atmospheric diffusion; deuterium hydrogen exchange; evolution; geological time; historical period; hydration; hydrology; priority journal; sea; volcano; water content; water loss; weathering; Emmelichthyidae
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245365
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States
推荐引用方式 GB/T 7714	Scheller E.L.,Ehlmann B.L.,Hu R.,et al. Long-term drying of Mars by sequestration of ocean-scale volumes of water in the crust[J],2021,372(6537).
APA	Scheller E.L.,Ehlmann B.L.,Hu R.,Adams D.J.,&Yung Y.L..(2021).Long-term drying of Mars by sequestration of ocean-scale volumes of water in the crust.Science,372(6537).
MLA	Scheller E.L.,et al."Long-term drying of Mars by sequestration of ocean-scale volumes of water in the crust".Science 372.6537(2021).