Results 41 to 50 of about 113,623 (164)

Pitted terrains on (1) Ceres and implications for shallow subsurface volatile distribution

Geophysical Research Letters, 2017
Prior to the arrival of the Dawn spacecraft at Ceres, the dwarf planet was anticipated to be ice‐rich. Searches for morphological features related to ice have been ongoing during Dawn's mission at Ceres.
H. G. Sizemore, T. Platz, N. Schorghofer, T. H. Prettyman, M. C. De Sanctis, D. A. Crown, N. Schmedemann, A. Neesemann, T. Kneissl, S. Marchi, P. M. Schenk, M. T. Bland, B. E. Schmidt, K. H. G. Hughson, F. Tosi, F. Zambon, S. C. Mest, R. A. Yingst, D. A. Williams, C. T. Russell, C. A. Raymond   +20 more
doaj   +1 more source

Ground-Ice Wedges: The Dominant Form of Ground-Ice on the North Coast of Alaska [PDF]

The Journal of Geology, 1915
It is a widely known fact that the ground in Arctic and subArctic regions is permanently frozen to a great depth, only the upper few feet thawing in summer. Nearly all observers have reported the presence of bodies of more or less clear ice underlying the surface of the ground, usually immediately below the limit of annual thawing.
openaire   +1 more source

Isotopic composition on ground ice in Western Yamal (Marre-Sale)

Лëд и снег, 2015
The profile of Quaternary sediments near Marre-Salle polar station, Western Yamal Peninsula, has large bodies of tabular ground ice. This profile is considered strata-typical and critical in understanding of paleogeographic conditions of the Arctic in ...
I. D. Streletskaya, A. A. Vasiliev, G. E. Oblogov, A. G. Matyukhin   +3 more
doaj   +1 more source

The ground ice melting has accelerated the lake expansion in the hinterland of the permafrost region on the Qinghai-Tibet Plateau

Journal of Hydrology: Regional Studies
Study region: The Zonag Lake-Yanhu Lake basin on the Qinghai-Tibet Plateau (QTP). Study focus: The melting of ground ice near the permafrost table is an important factor leading to the lake expansion on the QTP.
Shibo Liu, Huayun Zhou, Lin Zhao, Lingxiao Wang, Defu Zou, Guojie Hu, Yuxin Zhang, Zhe Sun, Zhibin Li, Yongping Qiao   +9 more
doaj   +1 more source

Dissolved organic carbon (DOC) in Arctic ground ice [PDF]

The Cryosphere, 2015
Thermal permafrost degradation and coastal erosion in the Arctic remobilize substantial amounts of organic carbon (OC) and nutrients which have accumulated in late Pleistocene and Holocene unconsolidated deposits.
M. Fritz, T. Opel, G. Tanski, U. Herzschuh, H. Meyer, A. Eulenburg, H. Lantuit   +6 more
doaj   +1 more source

Ground ice map of Canada

, 2020
This Open File presents new national-scale mapping of ground ice conditions in Canada. The mapping depicts a first-order estimate of the combined volumetric percentage of excess ice in the top 5 m of permafrost from segregated, wedge, and relict ice. The estimates for the three ice types are based on modelling by O'Neill et al.
H B O'Neill, S A Wolfe, C Duchesne
openaire   +1 more source

Ice–shelf Grounding: Ice and Bedrock Temperature Changes [PDF]

Journal of Glaciology, 1980
Abstract Ice rises form where an ice shelf runs aground on the sea bed. After grounding occurs, basal ice temperatures cool from the sea-water temperature towards an equilibrium temperature appropriate to grounded ice. This cooling can take many thousands of years, and much of the delay is due to the thermal inertia of the bedrock ...
Douglas R. MacAyeal, Robert H. Thomas
openaire   +1 more source

The Predictive Skill of a Remote Sensing-Based Machine Learning Model for Ice Wedge and Visible Ground Ice Identification in Western Arctic Canada

Remote Sensing
Fine-scale maps of ground ice and related surface features are critical for permafrost-related modelling and management. However, such maps are lacking across almost the entire Arctic.
Qianyu Chang, Simon Zwieback, Aaron A. Berg   +2 more
doaj   +1 more source

Twenty-four buried ice masses remotely mapped in Transantarctic Mountains, Antarctica

Geocarto International, 2023
Glacial ice contains information on paleoclimate, but typically is less than 1 Myrs old because glaciers continuously flow and melt. A recently discovered buried ice mass in Antarctica is dated to 3-5 Myrs and highlights the potential for long ...
Jaakko Putkonen, Taufique H. Mahmood
doaj   +1 more source

The Ice Factor in Frozen Ground

, 2007
The nature of ice formations in frozen ground has been a major subject of investigation for Ross Mackay. In this paper, characteristics of the freezing of water in porous materials are reviewed and examples given of the effects of frost action. The thermodynamic basis for the explanation of ice segregation is given and the possible role of spreading ...
openaire   +2 more sources