منابع مشابه
Spatial relationships between patterned ground and ground ice detected by the Neutron Spectrometer on Mars
[1] Patterned grounds, like polygonal features, are the signature of climatic effects in periglacial regions on Earth. Identifying similar features on Mars is important for an understanding of the past Martian climate. In this study we mapped fresh patterned landforms from the systematic analysis of Mars Orbiter Camera high-resolution images. We show that most of them are distributed at latitud...
متن کاملFormation of patterned ground and sublimation till over Miocene glacier ice in Beacon Valley, southern Victoria Land, Antarctica
A thin glacial diamicton, informally termed Granite drift, occupies the floor of central Beacon Valley in southern Victoria Land, Antarctica. This drift is ,1.0 m thick and rests with sharp planar contacts on stagnant glacier ice reportedly of Miocene age, older than 8.1 Ma. The age of the ice is based on 40Ar/39Ar analyses of presumed in situ ash-fall deposits that occur within Granite drift. ...
متن کاملDistribution and origin of patterned ground on Mullins Valley debris-covered glacier, Antarctica: the roles of ice flow and sublimation
We map polygonally patterned ground formed in sublimation tills that overlie debris-covered glaciers in Mullins Valley and central Beacon Valley, in southern Victoria Land, Antarctica, and distinguish five morphological zones. Where the Mullins Valley debris-covered glacier debouches into Beacon Valley, polygonal patterning transitions from radial (orthogonal) intersections to non-oriented (hex...
متن کاملUnder-ice Boundary Layer
Sea ice is in almost constant motion in response to wind, ocean currents, and forces transmitted within the ice cover itself, thus there is nearly always a zone of sheared Sow between the ice and underlying, undisturbed ocean where turbulence transports momentum, heat, salt, and other contaminants vertically. The zone in which these turbulent Suxes occur, which can span from a few to hundreds o...
متن کاملCircumpolar Mapping of Ground-Fast Lake Ice
1 Zentralanstalt für Meteorologie und Geodynamik, Vienna, Austria, 2 Department of Geodesy and Geoinformation, Vienna University of Technology, Vienna, Austria, 3 Academic Department of Cryosophy, Earth Cryosphere Institute, Russian Academy of Sciences, Tyumen, Russia, 4 Academic Department of Cryosophy, Tyumen State University, Tyumen, Russia, 5 Svalbard Integrated Arctic Earth Observing Syste...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1962
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000027489