DOI: 10.1002/2015GL063240
论文题名: Ceres: Predictions for near-surface water ice stability and implications for plume generating processes
作者: Titus T.N.
刊名: Geophysical Research Letters
ISSN: 0094-8823
EISSN: 1944-8554
出版年: 2015
卷: 42, 期: 7 起始页码: 2130
结束页码: 2136
语种: 英语
英文关键词: Ceres
; cryovolcanism
; dwarf planets
; ice
; sublimation
; thermal inertia
Scopus关键词: Sublimation
; Surface roughness
; Surface waters
; Ceres
; Cryovolcanism
; Dwarf planets
; Heating source
; Physical parameters
; Solar insolation
; Thermal inertia
; Thermal model
; Ice
; planetary atmosphere
; sublimation
; vaporization
; volcanism
; Ceres
英文摘要: This paper will constrain the possible sources and processes for the formation of recently observed H2O vapor plumes above the surface of the dwarf planet Ceres. Two hypotheses have been proposed: (1) cryovolcanism where the water source is the mantle and the heating source is still unknown or (2) comet-like sublimation where near-surface water ice is vaporized by seasonally increasing solar insolation. We test hypothesis 2, comet-like near-surface sublimation, by using a thermal model to examine the stability of water ice in the near surface. For a reasonable range of physical parameters (thermal inertia, surface roughness, and slopes), we find that water ice is only stable at latitudes higher than ∼40-60 . These results indicate that either (a) the physical properties of Ceres are unlike our expectations or (b) an alternative to comet-like sublimation, such as the cryovolcanism hypothesis, must be invoked. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928697609&doi=10.1002%2f2015GL063240&partnerID=40&md5=0887dd3e1867858c3f9fecfd3b45b3a3
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8439
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: U. S. Geological Survey Astrogeology Science Center, Flagstaff, AZ, United States
Recommended Citation:
Titus T.N.. Ceres: Predictions for near-surface water ice stability and implications for plume generating processes[J]. Geophysical Research Letters,2015-01-01,42(7).