| DOI: | 10.1002/2016GL070179
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| 论文题名: | The water content of recurring slope lineae on Mars |
| 作者: | Edwards C.S.; Piqueux S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8658
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| EISSN: | 1944-8389
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| 出版年: | 2016
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| 卷: | 43, 期:17 | | 起始页码: | 8912
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| 结束页码: | 8919
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| 语种: | 英语
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| 英文关键词: | Mars
; recurring slope lineae
; THEMIS
; thermophysics
; water budget
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| Scopus关键词: | Atmospheric temperature
; Budget control
; Flow of water
; Heat transfer
; Hydraulics
; Image reconstruction
; Martian surface analysis
; Salts
; Surface properties
; Temperature measurement
; Mars
; Recurring slope lineae
; THEMIS
; Thermophysics
; Water budget
; Uncertainty analysis
; evaporite
; freeze-thaw cycle
; heat transfer
; liquid
; Martian atmosphere
; regolith
; salinity
; slope dynamics
; temperature profile
; thermodynamics
; water budget
; water content
; water flow
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| 英文摘要: | Observations of recurring slope lineae (RSL) from the High-Resolution Imaging Science Experiment have been interpreted as present-day, seasonally variable liquid water flows; however, orbital spectroscopy has not confirmed the presence of liquid H2O, only hydrated salts. Thermal Emission Imaging System (THEMIS) temperature data and a numerical heat transfer model definitively constrain the amount of water associated with RSL. Surface temperature differences between RSL-bearing and dry RSL-free terrains are consistent with no water associated with RSL and, based on measurement uncertainties, limit the water content of RSL to at most 0.5–3 wt %. In addition, distinct high thermal inertia regolith signatures expected with crust-forming evaporitic salt deposits from cyclical briny water flows are not observed, indicating low water salinity (if any) and/or low enough volumes to prevent their formation. Alternatively, observed salts may be preexisting in soils at low abundances (i.e., near or below detection limits) and largely immobile. These RSL-rich surfaces experience ~100 K diurnal temperature oscillations, possible freeze/thaw cycles and/or complete evaporation on time scales that challenge their habitability potential. The unique surface temperature measurements provided by THEMIS are consistent with a dry RSL hypothesis or at least significantly limit the water content of Martian RSL. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987722660&doi=10.1002%2f2016GL070179&partnerID=40&md5=f57cf70b4da66de682544404c0f08aec
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9621
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| 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: | Astrogeology Science Center, U. S. Geological Survey, Flagstaff, AZ, United States
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| Recommended Citation: | |
Edwards C.S.,Piqueux S.. The water content of recurring slope lineae on Mars[J]. Geophysical Research Letters,2016-01-01,43(17).
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