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DOI | 10.1002/2017GL074723 |
New evidence for surface water ice in small-scale cold traps and in three large craters at the north polar region of Mercury from the Mercury Laser Altimeter | |
Deutsch, Ariel N.1; Neumann, Gregory A.2; Head, James W.1 | |
2017-09-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Mercury Laser Altimeter (MLA) measured surface reflectance, r(s), at 1064 nm. On Mercury, most water-ice deposits have anomalously low r(s) values indicative of an insulating layer beneath which ice is buried. Previous detections of surface water ice (without an insulating layer) were limited to seven possible craters. Here we map r(s) in three additional permanently shadowed craters that host radar-bright deposits. Each crater has a mean r(s) value >0.3, suggesting that water ice is exposed at the surface without an overlying insulating layer. We also identify small-scale cold traps (<5 km in diameter) where r(s)>0.3 and permanent shadows have biannual maximum surface temperatures <100 K. We suggest that a substantial amount of Mercury's water ice is not confined to large craters but exists within microcold traps, within rough patches and intercrater terrain. |
英文关键词 | Mercury ice reflectance |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413148100015 |
WOS关键词 | MESSENGER SPACECRAFT ; VOLATILES ; IMAGES ; ANOMALIES ; STABILITY ; DEPOSITS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/26891 |
专题 | 气候变化 |
作者单位 | 1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Deutsch, Ariel N.,Neumann, Gregory A.,Head, James W.. New evidence for surface water ice in small-scale cold traps and in three large craters at the north polar region of Mercury from the Mercury Laser Altimeter[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(18). |
APA | Deutsch, Ariel N.,Neumann, Gregory A.,&Head, James W..(2017).New evidence for surface water ice in small-scale cold traps and in three large craters at the north polar region of Mercury from the Mercury Laser Altimeter.GEOPHYSICAL RESEARCH LETTERS,44(18). |
MLA | Deutsch, Ariel N.,et al."New evidence for surface water ice in small-scale cold traps and in three large craters at the north polar region of Mercury from the Mercury Laser Altimeter".GEOPHYSICAL RESEARCH LETTERS 44.18(2017). |
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