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DOI | 10.1038/s41561-020-0561-x |
Dry late accretion inferred from Venus's coupled atmosphere and internal evolution | |
Gillmann, C.1; Golabek, G. J.2; Raymond, S. N.3,4; Schonbachler, M.5; Tackley, P. J.5; Dehant, V.6,7; Debaille, V.1 | |
2020-04-07 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
卷号 | 13期号:4页码:265-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Belgium; Germany; France; Switzerland |
英文摘要 | It remains contentious whether the meteoritic material delivered to the terrestrial planets after the end of core formation was rich or poor in water and other volatiles. As Venus's atmosphere has probably experienced less volatile recycling over its history than Earth's, it may be possible to constrain the volatile delivery to the primitive Venusian atmosphere from the planet's present-day atmospheric composition. Here we investigate the long-term evolution of Venus using self-consistent numerical simulations of global thermochemical mantle convection coupled with both an atmospheric evolution model and a late accretion N-body delivery model. We found that atmospheric escape is only able to remove a limited amount of water over the history of the planet, and that the late accretion of wet material exceeds this sink and would result in a present-day atmosphere that is too rich in volatiles. A preferentially dry composition of the late accretion impactors is most consistent with measurements of atmospheric H2O, CO2 and N-2. Hence, we suggest that the late accreted material delivered to Venus was mostly dry enstatite chondrite, consistent with isotopic data for Earth, with less than 2.5% (by mass) wet carbonaceous chondrites. In this scenario, the majority of Venus's and Earth's water would have been delivered during the main accretion phase. Venus's atmospheric composition suggests limited water delivery to the terrestrial planets by late accretion, according to numerical simulations of the interior and atmospheric evolution of Venus under various late accretion scenarios. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000524633000001 |
WOS关键词 | HIGHLY SIDEROPHILE ELEMENTS ; TERRESTRIAL PLANETS ; HYDRODYNAMIC ESCAPE ; MASS FRACTIONATION ; SOLAR-ACTIVITY ; EARTHS MANTLE ; NOBLE-GASES ; LATE VENEER ; WATER-LOSS ; MARS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/249279 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Libre Bruxelles, Lab G Time, Brussels, Belgium; 2.Univ Bayreuth, Bayer Geoinst, Bayreuth, Germany; 3.CNRS, Lab Astrophys Bordeaux, Pessac, France; 4.Univ Bordeaux, Pessac, France; 5.Swiss Fed Inst Technol, Dept Earth Sci, Zurich, Switzerland; 6.Catholic Univ Louvain, Louvain La Neuve, Belgium; 7.Royal Observ Belgium, Brussels, Belgium |
推荐引用方式 GB/T 7714 | Gillmann, C.,Golabek, G. J.,Raymond, S. N.,et al. Dry late accretion inferred from Venus's coupled atmosphere and internal evolution[J]. NATURE GEOSCIENCE,2020,13(4):265-+. |
APA | Gillmann, C..,Golabek, G. J..,Raymond, S. N..,Schonbachler, M..,Tackley, P. J..,...&Debaille, V..(2020).Dry late accretion inferred from Venus's coupled atmosphere and internal evolution.NATURE GEOSCIENCE,13(4),265-+. |
MLA | Gillmann, C.,et al."Dry late accretion inferred from Venus's coupled atmosphere and internal evolution".NATURE GEOSCIENCE 13.4(2020):265-+. |
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