气候变化领域集成服务门户(CCPortal): Exposed subsurface ice sheets in the Martian mid-latitudes

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DOI	10.1126/science.aao1619
	Exposed subsurface ice sheets in the Martian mid-latitudes
	Dundas C.M.; Bramson A.M.; Ojha L.; Wray J.J.; Mellon M.T.; Byrne S.; McEwen A.S.; Putzig N.E.; Viola D.; Sutton S.; Clark E.; Holt J.W.
发表日期	2018
ISSN	0036-8075
起始页码	199
结束页码	201
卷号	359 期号:6372
英文摘要	Thick deposits cover broad regions of the Martian mid-latitudes with a smooth mantle; erosion in these regions creates scarps that expose the internal structure of the mantle. We investigated eight of these locations and found that they expose deposits of water ice that can be >100 meters thick, extending downward from depths as shallow as 1 to 2 meters below the surface. The scarps are actively retreating because of sublimation of the exposed water ice. The ice deposits likely originated as snowfall during Mars' high-obliquity periods and have now compacted into massive, fractured, and layered ice. We expect the vertical structure of Martian ice-rich deposits to preserve a record of ice deposition and past climate.
英文关键词	ice; ice sheet; ice thickness; latitude; mantle; Mars; Martian atmosphere; paleoclimate; sublimation; Article; astronomy; dispersity; dust; environmental erosion; environmental exposure; environmental temperature; geographic distribution; geomorphology; habitat quality; ice sheet; latitude; priority journal; seasonal variation; space; ice cover; space; Extraterrestrial Environment; Ice Cover; Mars
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243583
作者单位	Astrogeology Science Center, U.S. Geological Survey, 2255 N. Gemini Drive, Flagstaff, AZ 86001, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Johns Hopkins University, Applied Physics Laboratory, Laurel, MD, United States; Planetary Science Institute, 1546 Cole Boulevard, Lakewood, CO 80401, United States; Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78758, United States
推荐引用方式 GB/T 7714	Dundas C.M.,Bramson A.M.,Ojha L.,et al. Exposed subsurface ice sheets in the Martian mid-latitudes[J],2018,359(6372).
APA	Dundas C.M..,Bramson A.M..,Ojha L..,Wray J.J..,Mellon M.T..,...&Holt J.W..(2018).Exposed subsurface ice sheets in the Martian mid-latitudes.Science,359(6372).
MLA	Dundas C.M.,et al."Exposed subsurface ice sheets in the Martian mid-latitudes".Science 359.6372(2018).