globalchange  > 科学计划与规划
DOI: 10.1002/2015GL063559
论文题名:
Europa's surface color suggests an ocean rich with sodium chloride
作者: Hand K.P.; Carlson R.W.
刊名: Geophysical Research Letters
ISSN: 0094-9107
EISSN: 1944-8838
出版年: 2015
卷: 42, 期:9
起始页码: 3174
结束页码: 3178
语种: 英语
英文关键词: astrobiology ; Europa ; Jupiter ; planetary science
Scopus关键词: Astrobiology ; Color ; Salts ; Silicates ; Sodium chloride ; Europa ; Hydrated sulfates ; Ice materials ; Jupiters ; Planetary science ; Sub-surface ocean ; Surface colors ; Surface conditions ; Oceanography ; endogenous cue ; ice cover ; Moon ; sodium chloride ; surface layer
英文摘要: The composition of Europa's surface may be representative of the subsurface ocean; however, considerable debate persists regarding the endogenous or exogenous nature of a hydrated sulfate feature on Europa. Direct evidence of oceanic salts on Europa's surface has been largely inconclusive. We show that the observed color within geologically young features on Europa's surface can be explained by sodium chloride delivered from the ocean below. We find that sodium chloride, when exposed to Europa surface conditions, accumulates electrons in F and M centers, yielding a yellow-brown discoloration comparable to Europa's surface. Irradiation of sodium chloride from Europa's ocean thus provides a simple and elegant solution to the color of the non-ice material observed on Europa. This evidence for endogenous salts suggests that Europa's ocean is interacting with a silicate seafloor, a critical consideration for assessing habitability. Key Points We provide compelling evidence for endogenous salts on Europa Irradiated NaCl is comparable to Europa's surface color F and M centers in alkali halides reveal Europa's salts ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930478594&doi=10.1002%2f2015GL063559&partnerID=40&md5=f6f554582af8920d0033da07c6ac4271
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8723
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States

Recommended Citation:
Hand K.P.,Carlson R.W.. Europa's surface color suggests an ocean rich with sodium chloride[J]. Geophysical Research Letters,2015-01-01,42(9).
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