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DOI | 10.1029/2021GL095416 |
Downward oxidant transport through Europa’s ice shell by density-driven brine percolation | |
Marc A. Hesse; Jacob S. Jordan; Steven D. Vance; Apurva V. Oza | |
2022-02-10 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2022 |
英文摘要 | Jupiter’s moon Europa is thought to have an ocean beneath its ice shell and the habitability of the internal ocean depends on the availability of redox gradients. Downward transport of radiolytic materials produced at the surface through the ice shell sets the flux of oxidants into the ocean. Here, we propose that oxidants are transported through the ice shell by the drainage of near-surface brines formed concurrently with chaotic terrains. We estimate that Europa’s porous regolith contains 3.7 × 1014 to 5.6 × 1018 moles (1.2 × 1013 − 1.8 × 1017 kg) of trapped O2. Simulations of coupled melt-migration and eutectic phase behavior show that brines drain before they refreeze, delivering ∼85% of the surface oxidants to the ocean on timescales of 2 × 104 years. From the distribution of chaotic terrains and from Europa’s surface age we estimate that brine drainage could deliver O2 to the ocean at rates of 2.0 × 106 to 1.3 × 1010 mol/yr. |
领域 | 气候变化 |
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/346773 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Marc A. Hesse,Jacob S. Jordan,Steven D. Vance,等. Downward oxidant transport through Europa’s ice shell by density-driven brine percolation[J]. Geophysical Research Letters,2022. |
APA | Marc A. Hesse,Jacob S. Jordan,Steven D. Vance,&Apurva V. Oza.(2022).Downward oxidant transport through Europa’s ice shell by density-driven brine percolation.Geophysical Research Letters. |
MLA | Marc A. Hesse,et al."Downward oxidant transport through Europa’s ice shell by density-driven brine percolation".Geophysical Research Letters (2022). |
条目包含的文件 | 条目无相关文件。 |
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