| DOI: | 10.1002/2016GL069368
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| 论文题名: | The permanently shadowed regions of dwarf planet Ceres |
| 作者: | Schorghofer N.; Mazarico E.; Platz T.; Preusker F.; Schröder S.E.; Raymond C.A.; Russell C.T.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8903
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| EISSN: | 1944-8634
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| 出版年: | 2016
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| 卷: | 43, 期:13 | | 起始页码: | 6783
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| 结束页码: | 6789
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| 语种: | 英语
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| 英文关键词: | Ceres
; cold traps
; Dawn mission
; planetary science
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| Scopus关键词: | Ionosphere
; Moon
; Poles
; Stereo image processing
; Accumulation rates
; Available water
; Ceres
; Cold traps
; Dawn missions
; Geological time
; Planetary science
; Shadowed regions
; Molecules
; geological time
; instrumentation
; irradiance
; planet
; planetary atmosphere
; satellite
; solar radiation
; spacecraft
; stereo image
; topography
; Ceres
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| 英文摘要: | Ceres has only a small spin axis tilt (4°), and craters near its rotational poles can experience permanent shadow and trap volatiles, as is the case on Mercury and on Earth’s Moon. Topography derived from stereo imaging by the Dawn spacecraft is used to calculate direct solar irradiance that defines the extent of the permanently shadowed regions (PSRs). In the northern polar region, PSRs cover ∼1800 km2 or 0.13% of the hemisphere, and most of the PSRs are cold enough to trap water ice over geological time periods. Based on modeling of the water exosphere, water molecules seasonally reside around the winter pole and ultimately an estimated 0.14% of molecules get trapped. Even for the lowest estimates of the amount of available water, this predicts accumulation rates in excess of loss rates, and hence, there should be fresh ice deposits in the cold traps. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979083996&doi=10.1002%2f2016GL069368&partnerID=40&md5=36eb8923c8b3dcc75b4704cf033708ff
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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/9866
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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: | Institute for Astronomy, University of Hawai’i at Mānoa, Honolulu, HI, United States
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| Recommended Citation: | |
Schorghofer N.,Mazarico E.,Platz T.,et al. The permanently shadowed regions of dwarf planet Ceres[J]. Geophysical Research Letters,2016-01-01,43(13).
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