Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL072250 |
Ceres's obliquity history and its implications for the permanently shadowed regions | |
Ermakov, A. I.1,2; Mazarico, E.3; Schroeder, S. E.4; Carsenty, U.4; Schorghofer, N.5; Preusker, F.4; Raymond, C. A.2; Russell, C. T.6; Zuber, M. T.1 | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Due to the small current obliquity of Ceres (epsilon approximate to 4 degrees), permanently shadowed regions (PSRs) exist on the dwarf planet's surface. Since the existence and persistence of the PSRs depend on the obliquity, we compute the obliquity history over the last 3Myr and find that it undergoes large oscillations with a period of 24.5kyr and a maximum of epsilon(max)approximate to 19.6 degrees. During periods of large obliquity, most of the present-day PSRs receive direct sunlight. Some craters in Ceres's polar regions possess bright crater floor deposits (BCFDs). We find an apparent correlation between BCFDs and the most persistent PSRs. In the north, only two PSRs remain at epsilon(max) and they both contain BCFDs. In the south, one of the two only craters that remain in shadow at epsilon(max) contains a BCFD. The location of BCFDs within persistent PSRs strongly suggests that BCFDs consist of volatiles accumulated in PSR cold traps: either water molecules trapped from the exosphere or exposed ground ice. |
英文关键词 | obliquity volatiles dynamics |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399762700005 |
WOS关键词 | ELLIPSOID DIMENSIONS ; LUNAR ; MERCURY ; ICE ; EVOLUTION ; VOLATILES ; TOPOGRAPHY ; CLIMATE ; IMAGES ; MOONS |
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/27212 |
专题 | 气候变化 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 4.German Aerosp Ctr, Inst Planetary Res, Berlin, Germany; 5.Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA; 6.Univ Calif Los Angeles, IGPP EPSS, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | Ermakov, A. I.,Mazarico, E.,Schroeder, S. E.,et al. Ceres's obliquity history and its implications for the permanently shadowed regions[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6). |
APA | Ermakov, A. I..,Mazarico, E..,Schroeder, S. E..,Carsenty, U..,Schorghofer, N..,...&Zuber, M. T..(2017).Ceres's obliquity history and its implications for the permanently shadowed regions.GEOPHYSICAL RESEARCH LETTERS,44(6). |
MLA | Ermakov, A. I.,et al."Ceres's obliquity history and its implications for the permanently shadowed regions".GEOPHYSICAL RESEARCH LETTERS 44.6(2017). |
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