干旱区生态环境知识资源中心(Arid): The Thermal Behavior of Ice-Bearing Ground: The Highest Cold, Dry Desert on Earth as an Analog for Conditions on Mars, at Ojos del Salado, Puna de Atacama-Altiplano Region

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DOI	10.1089/ast.2018.2021
	The Thermal Behavior of Ice-Bearing Ground: The Highest Cold, Dry Desert on Earth as an Analog for Conditions on Mars, at Ojos del Salado, Puna de Atacama-Altiplano Region
	Nagy, Balazs 1; Kovacs, Jozsef 2; Igneczi, Adam 3; Beleznai, Szabolcs 4; Mari, Laszlo 1; Kereszturi, Akos 5; Szalai, Zoltan 6
通讯作者	Kereszturi, Akos
来源期刊	ASTROBIOLOGY
ISSN	1531-1074
EISSN	1557-8070
出版年	2020
卷号	20 期号:6 页码:701-722
英文摘要	Hourly ground temperature measurements from the highest shallow ground temperature monitoring system on Earth and sedimentological data were used to construct a thermal model at the Ojos del Salado, in the Dry Andes (5830 m a.s.l.). The results were used to investigate daily temperature fluctuations and the phase changes of water in the regolith, where the permafrost and ground ice are present. Model results reveal that the thermal evolution of the ground and the speed of phase changes are determined by the differing thermal properties of liquid and solid water, and change in their vertical distribution over time. At the start of summer, the increasing ratio of liquid water near the surface insulates deeper layers, and thus, melting is delayed and daily temperature fluctuations are damped in the regolith. The approach of the present study includes testing how simple, relatively low processing power required data analysis might be applied for Mars in the future. Periglacial and aeolian landforms were also surveyed, with a focus on thermo- and cryokarstic features, as previous studies have shown that patterned ground structures are rare in the region due to the highly porous nature of the dry regolith. Besides the wealth of aeolian features, gravel mantled megaripples, solifluction lobes, and thermo- and cryokarstic depressions, were found. In the case of the former, a close association with ephemeral ponds-hosting extremophilic microorganisms-was found, highlighting the fact that meltwater percolates horizontally even in this extremely dry environment. The thermo- and cryokarstic depressions also reveal the role of melting and its intricate connection to sublimation. As these features indicate degrading permafrost, closer investigation may provide useful analogs for earlier and contemporary climatic changes on Mars.
英文关键词	Mars Permafrost Active layer Atacama Desert Periglacial Mountain desert
类型	Article
语种	英语
国家	Hungary ; England
收录类别	SCI-E
WOS记录号	WOS:000539576300003
WOS关键词	TRANSIENT LIQUID WATER ; ROCK GLACIERS ; ANTARCTIC PERMAFROST ; SOUTHERN-HEMISPHERE ; CLIMATE-CHANGE ; GALE CRATER ; ANDES ; LANDFORMS ; SURFACE ; CHILE
WOS类目	Astronomy & Astrophysics ; Biology ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318730
作者单位	1.Eotvos Lorand Univ, Dept Phys Geog, Budapest, Hungary; 2.Eotvos Lorand Univ, Dept Phys & Appl Geol, Budapest, Hungary; 3.Univ Sheffield, Dept Geog, Sheffield, S Yorkshire, England; 4.Budapest Univ Technol & Econ, Dept Atom Phys, Budapest, Hungary; 5.MTA Ctr Excellence, Konkoly Observ, Res Ctr Astron & Earth Sci, Budapest, Hungary; 6.Eotvos Lorand Univ, Dept Environm & Landscape Geog, Budapest, Hungary
推荐引用方式 GB/T 7714	Nagy, Balazs,Kovacs, Jozsef,Igneczi, Adam,et al. The Thermal Behavior of Ice-Bearing Ground: The Highest Cold, Dry Desert on Earth as an Analog for Conditions on Mars, at Ojos del Salado, Puna de Atacama-Altiplano Region[J],2020,20(6):701-722.
APA	Nagy, Balazs.,Kovacs, Jozsef.,Igneczi, Adam.,Beleznai, Szabolcs.,Mari, Laszlo.,...&Szalai, Zoltan.(2020).The Thermal Behavior of Ice-Bearing Ground: The Highest Cold, Dry Desert on Earth as an Analog for Conditions on Mars, at Ojos del Salado, Puna de Atacama-Altiplano Region.ASTROBIOLOGY,20(6),701-722.
MLA	Nagy, Balazs,et al."The Thermal Behavior of Ice-Bearing Ground: The Highest Cold, Dry Desert on Earth as an Analog for Conditions on Mars, at Ojos del Salado, Puna de Atacama-Altiplano Region".ASTROBIOLOGY 20.6(2020):701-722.