Isaac Heard Garler, George Harrison Norroy, Jno. C. Brooke, Somerset, Ralph Bigland, Richmond, Fras. Townsend, Windsor, Benjamin Pingo, York, John Dodington Forth Portwllis, John Atkinson Rougecrcix,
... Somerset, Ralph Bigland, Richmond, Fras. Townsend Windsor, Benjamin Pingo, York, John Dodington Forth Portwllis, John Atkinson Rougecrcix. ...
0000 - Gale Group | NCCO BritishPolitics
Vasiliy Demidov, Nikita Demidov, Sergey Verkulich, Sebastian Wetterich,
... study explores the formation, preservation and degradation of pingos in High Arctic environments, which are controlled by ... images and digital elevation model data revealed 136 pingo mounds on Svalbard Archipelago. The pingos are distributed at elevations from 0 to 201 ... median of 42 m asl. Of those, 44 pingos are found above and 92 below the maximum level of the respective local Holocene transgressions. All pingos were found in terrain favorable for the formation of hydrologically sourced open-system pingos. Based on published geological data, at least 55 ...
Tópico(s): Geology and Paleoclimatology Research
2022 - Elsevier BV | Geomorphology
From Our Racing Correspondent, FROM OUR RACING CORRESPONDENT, FROM NEWMARKET CORRESPONDENT, FROM OUR YACHTING CORRESPONDENT, From Our Athletics Correspondent, FROM A STAFF REPORTER, FROM OUR HOCKEY CORRESPONDENT, From Our Association Football Correspondent, FROM OUR GOLF CORRESPONDENT, FROM OUR SCOTTISH CORRESPONDENT, FROM OUR NORTHERN CORRESPONDENT, FROM OUR PHILATELIC CORRESPONDENT, FROM OUR SHIPPING CORRESPONDENT, FROM OUR MIDLAND CORRESPONDENT, FROM OUR CORRESPONDENT, From Our Correspondent, From Our Special Correspondent, FROM OUR EQUESTRIAN CORRESPONDENT, FROM OUR OWN CORRESPONDENT, FROM OUR COARESPONDENT, FROM OUR DIPLOMATIC CORRESPONDENT, FROM OUR UNITED NATIONS CORRESPONDENT, From Our Latin American Correspondent, FROM A SPECIAL CORRESPONDENT, FROM OUR COMMONWEALTH STAFF, From Our Labour Correspondent, From Our Political Correspondent, From Our United Nations Correspondent, From Our Own Correspondent, E. F. E. RYAN, D. M. RYAN, R. TAIT., SIDNEY L. BERNSIEIN, H. A. J. WALTON, PETER E. M. SHARP., C. E. CARRINGTON, L. R. L. ANDERSON., D. F. R. PHILLIPS, R. A. BEDDIS, By Sir Alexander Sim, R. H. C. HAMMOND, RICHARD COLLIER, The Headmaster, Mr. Maurice S. Lush, BY E. MOBERLY BELL, From Our Music Critic, FROM OUR SPECIAL CORRESPONDENT, FROM A CORRESPONDENT, From Our Special Correspondents, From Our Motoring Correspondent, FROM OUR ESTATES CORRESPONDENT, From Our Bridge Correspondent, By Our City Editor, From a Correspondent,
... Preferred, Rebuilt Cathedral May Be Moved, Festival Bars Pingo And His Bottle Untraced Verse, Proud Of British ...
1963 - Gale Group | TDA
Yurij K Vasil’chuk, Daniel E. Lawson, Kenji Yoshikawa, Nadine A Budantseva, Julia N Chizhova, Yevgeni Ye. Podborny, Alla Constantinovna Vasil'chuk,
... composition of ice within two closed system (hydrostatic) pingos indicate a complex history of ice formation by segregation and injection and pingo growth. Physical properties and internal structure of continuous ice cores in the center of the Weather Pingo near Prudhoe Bay, Alaska, and the Pestsovoye Pingo, in northwestern Siberia, were described and then sub- ... ice with depth reveal distinct patterns in both pingos indicative of ice growth as permafrost aggraded into ... ice crystal size in the cores of Weather Pingo. Once the water supply became limited, freezing under ...
Tópico(s): Geology and Paleoclimatology Research
2016 - Elsevier BV | Cold Regions Science and Technology
Kenji Yoshikawa, Natsagdorj Sharkhuu, Anarmaa Sharkhuu,
... complete sequence of ice within an open‐system pingo in northwestern Mongolia indicates a complex history of ice formation and pingo growth. A continuous section of ice 32 m long was cored through the centre of Mongot Pingo, and ice cores were analysed for stable isotopes ... measurements were observed in 2009 after drilling through pingo ice to artesian sub‐pingo water and compared with data collected from the same pingo in 1968. Approximately 850–950 m 3 of sub‐pingo water discharged within 120 h during drilling in ...
Tópico(s): Arctic and Antarctic ice dynamics
2013 - Wiley | Permafrost and Periglacial Processes
Most pingos have grown in residual ponds left behind by rapid lake drainage through erosion of ice-wedge polygon ... Precise surveys have been carried out on 17 pingos for periods ranging from 3 to 9 years. ... creates the high pore water pressures necessary for pingo growth. The subpermafrost water pressures frequently approach that ... total litho-static pressure of permafrost surrounding a pingo. The water pressure is often great enough to lift a pingo and intrude a sub-pingo water lens beneath it. The basal diameter of ...
Tópico(s): Methane Hydrates and Related Phenomena
2011 - Presses de l'Université de Montréal | Géographie physique et Quaternaire
Abstract. Pingos are prominent periglacial landforms in vast regions of the Arctic and Subarctic. They are indicators of modern ... version of a detailed spatial geodatabase of 6059 pingo locations in a 3.5×106 km2 region ... elevation datasets using a Geographic Information System (GIS). Pingo heights in the dataset vary between 2 and ... of 4.8 m. About 64% of the pingos occur in continuous permafrost with high ice content ... content and thick sediments. The majority of these pingos are likely hydrostatic pingos, which are typical of ...
Tópico(s): Arctic and Antarctic ice dynamics
2011 - Copernicus Publications | The cryosphere
Benjamin Jones, Guido Grosse, Kenneth M. Hinkel, Christopher D. Arp, Shane Walker, Richard Beck, John P. Galloway,
Pingos are circular to elongate ice-cored mounds that form by injection and freezing of pressurized water ... system to assess the distribution and morphometry of pingos within a 40,000 km2 area on the ... Plain of northern Alaska. We have identified 1247 pingo forms in the study region, ranging in height ... with a mean height of 4.6 m. Pingos in this region are of hydrostatic origin, with ... underlain by thick eolian sand deposits. The highest pingo density (0.18 km− 2) occurs where streams ... reworked these deposits. Morphometric analyses indicate that most pingos are small to medium in size (< 200 m ...
Tópico(s): Cryospheric studies and observations
2011 - Elsevier BV | Geomorphology
D. M. Burr, Kenneth L. Tanaka, Kenji Yoshikawa,
Pingos are massive ice-cored mounds that develop through pressurized groundwater flow mechanisms. Pingos and their collapsed forms are found in periglacial ... of locations on Mars. This literature review of pingos on Earth and Mars first summarizes the morphology of terrestrial pingos and their geologic contexts. That information is then used to asses hypothesized pingos on Mars. Pingo-like forms (PLFs) in Utopia Planitia are the most viable candidates for pingos or collapsed pingos. Other PLFs hypothesized in the ...
Tópico(s): Micro and Nano Robotics
2008 - Elsevier BV | Planetary and Space Science
Zhenhan Wu, Patrick J. Barosh, Lianjie Wang, Daogong Hu, Wei Wang,
Small seasonal pingos formed in Quaternary deposits along active fault zones in permafrost of the northern Tibetan Plateau exert destructive forces ... along the Golmud–Lhasa railway and highway. The pingos are particularly hazardous as they change position, or ... reveals the enormous force from exerted by a pingo at the 86th station of the highway. A ... strain fields resulting from an expansion of a pingo and bending of an oil pipeline at the ... after due consideration of the interaction between permafrost, pingo and pipeline. This followed establishing an engineering-geologic ...
Tópico(s): Offshore Engineering and Technologies
2007 - Elsevier BV | Engineering Geology
Neil Ross, Charles Harris, Hanne H. Christiansen, Peter Brabham,
... radar (GPR) investigations conducted on two open system pingos, Innerhytte pingo and Riverbed pingo, in Adventdalen, Svalbard, are described. The surveys were ... of these landforms. Surface exposures suggest that both pingos are largely formed in weak Jurassic shales. Little ... Strong subsurface reflections within the core of both pingos are interpreted as representing either the presence of ... chemistry, ice crystal properties or air content of pingo ice. Steeply dipping reflections are most pronounced on ...
Tópico(s): Climate change and permafrost
2005 - Taylor & Francis | Norsk Geografisk Tidsskrift - Norwegian Journal of Geography
Zhenhan Wu, Patrick J. Barosh, Daogong Hu, Zhonghai Wu, Peisheng Ye, Qisheng Liu, Zhou Chunjing,
Most pingos in the permafrost region of the high northern Tibetan Plateau form along active fault zones and many ... in an open system to supply water for pingo growth during the winter in overlying fluvial and lacustrian deposits. Springs remain after the pingos thaw in the summer. Fault movement, earthquakes and man's activities cause the water pathways supplying pingos to shift and consequently the pingos migrate. The hazard posed to the new Golmud–Lhasa railway across the plateau by migrating pingos is restricted to active fault zones, but is ...
Tópico(s): Geology and Paleoclimatology Research
2005 - Elsevier BV | Engineering Geology
... from precise surveys have been obtained for 11 pingos for periods ranging from 20 to 26 years. Most of the 1350 pingos, perhaps one quarter of the world's total, ... one or more residual ponds, the sites of pingo growth. Sub-pingo water lenses underlie many growing pingos.The pure ice which grows by downward freezing in a sub-pingo water lens may be composed of seasonal growth ... use in the study of past climates. Growing pingos underlain by sub-pingo water lenses can often be identified by features such as peripheral pingo rupture, spring flow, frost mound growth, normal faulting, ...
Tópico(s): Geology and Paleoclimatology Research
2002 - Presses de l'Université de Montréal | Géographie physique et Quaternaire
Pingos are isolated, conical mounds up to 50 m high with a core of ice covered by ... the ground is permanently frozen. Two types of pingo are distinguished, a closed-system and an open- ... is found on flat plains, whereas open-system pingos are found on valley floors. Open-system pingos grow by artesian pressure (Müller 1959; Washburn 1979). ... form a lens or core of ice. Active pingos have been reported from Svalbard, Russia, Alaska, Canada and Greenland (Washburn 1979), and fossil pingos from Pleistocene periglacial terrains have been reported from ...
Tópico(s): Paleontology and Stratigraphy of Fossils
1998 - Geoloical Survey of Denmark and Greenland | Geology of Greenland Survey Bulletin
Kenji Yoshikawa, Toshio Nakamura,
ABSTRACT The open-system pingos of Spitsbergen are formed outside terminal moraines, fault zones, and delta areas. Pingos in this study area were located near the ... in active geologic uplift areas. Three open-system pingos in the Adventdalen delta area of Spitsbergen were examined. Pingos closer to shore are younger in age and those farther away are older. Growth of these pingos occurs rapidly after initial submarine uplift and a minimum thickness of permafrost is established. Hut pingo, which is farthest from the sea, was formed ...
Tópico(s): Methane Hydrates and Related Phenomena
1996 - Cambridge University Press | Polar Record
Marilyn D. Walker, K. R. Everett, Donald A. Walker, Peter W. Birkeland,
Soils of pingos in the Prudhoe Bay region of northern Alaska (700N, 1480W) were examined to determine if their development could ... differential age between two morphologically distinct groups of pingos. The two morphological types, one with steep side ... of three steep-sided and two broad-based pingos. Profile development was quantified using an index that ... soil properties. Multiple lines of evidence from the pingo soils supports the differential age hypothesis. Broad-based pingos have greater concentrations of clay and iron, lower ...
Tópico(s): Aeolian processes and effects
1996 - Taylor & Francis | Arctic and Alpine Research
The birth and growth of Porsild Pingo (ice-cored hill) can be taken as fairly representative of the birth and growth of the more than 2000 closed-system pingos of the western arctic coast of Canada and adjacent Alaska. Porsild Pingo, named after a distinguished arctic botanist, has grown ... large lake that drained catastrophically about 1900. Porsild Pingo has grown up at the site of a ... the residual pond to give birth to Porsild Pingo came from pore water expulsion by downward and ... mound photographed by Porsild in May 1935. Porsild Pingo has grown up at, or very close to, ...
Tópico(s): Methane Hydrates and Related Phenomena
1988 - Arctic Institute of North America | ARCTIC
Many closed-system pingos are underlain by sub-pingo water lenses, and the same is probably true of numerous open-system pingos. In the early growth stage the bending of the frozen overburden of a pingo by a sub-pingo water lens can be compared to the bending ... theory do not apply fully to a growing pingo, because time-dependent plastic and creep deformation are ... the peripheral normal faulting and spring flow of pingos, summit failure, the ease with which elongated pingos appear to collapse, and the changing roles played ...
Tópico(s): Geological formations and processes
1987 - NRC Research Press | Canadian Journal of Earth Sciences
In 1976 and 1977 three growing pingos were drilled for the purpose of measuring sub-pingo water pressures beneath aggrading permafrost. All holes drilled through permafrost in the pingos and adjacent lake flats produced artesian flow. The flow from the pingos was clear and as the gushers rose to ... of 3 m above ground level, large sub-pingo water lenses under pressure seemed evident. The existence ... sounding their depths once permafrost was penetrated.One pingo had a 2.2 m deep water lens ... the top. Pressure transducers, installed in the sub-pingo water lenses or in the unfrozen sands beneath, ...
Tópico(s): Cryospheric studies and observations
1978 - NRC Research Press | Canadian Journal of Earth Sciences
Field studies have been carried out on two pingos on Tuktoyaktuk Peninsula, N.W.T. One pingo was studied from 1969–1976; the other was ... in permafrost shows that the tops of these pingos alternately rise and subside in response to the ... depth. The high pore water pressure that causes pingo uplift is produced by pore water expulsion adjacent to the pingo, where the thickness of permafrost is 2 to 3 times the pingo height. The pore water pressure beneath the permafrost surrounding the pingo may approach 100% of the lithostatic pressure. When ...
Tópico(s): Hydrocarbon exploration and reservoir analysis
1977 - NRC Research Press | Canadian Journal of Earth Sciences
The growth rates of 11 closed system pingos have been measured, by means of precise levelling of permanent bench marks anchored well down into permafrost, for the 1969–1972 period. As pingo growth decreases from the summit to the base, ... from the center out to the periphery. The pingos have grown up in the bottoms of lakes ... control upon the size and shape of the pingo which grows within it. The ice-core thickness equals the sum of the pingo height above the lake flat and the depth of the residual pond in which the pingo grew. Pingos tend to grow higher rather than ...
Tópico(s): Methane Hydrates and Related Phenomena
1973 - NRC Research Press | Canadian Journal of Earth Sciences
Julius Kunz, Christof Kneisel,
... study presents three‐dimensional investigations of a hydrostatic pingo in the Mackenzie Delta region and a hydraulic pingo in the Ogilvie Mountains and contributes to a ... understanding about the internal structures of the two pingo types. A combined approach using quasi‐three‐dimensional ... unfrozen areas in the subsurface. At the hydrostatic pingo a massive ice core as well as a ... is not located in the center of the pingo but at the western edge, whereas the eastern ... surrounds the massive ice core. At the hydraulic pingo, the expected internal structure could be confirmed and ...
Tópico(s): Landslides and related hazards
2021 - Wiley | Permafrost and Periglacial Processes
Nikita Demidov, Sebastian Wetterich, Sergey Verkulich, Aleksey Ekaykin, Hanno Meyer, М. А. Анисимов, Lutz Schirrmeister, Vasily Demidov, Andy Hodson,
Abstract. Pingos are common features in permafrost regions that form by subsurface massive-ice aggradation and create hill-like landforms. Pingos on Spitsbergen have been previously studied to explore ... to study the origin and freezing conditions in pingos. Our core record of 20.7 m thick massive pingo ice from Grøndalen is differentiated into four units: ... the reservoir was recharged. The water source for pingo formation shows similarity to spring water data from ... and Bøhmdalen. The presence of permafrost below the pingo ice body suggests that the talik is frozen, ...
Tópico(s): Geology and Paleoclimatology Research
2019 - Copernicus Publications | The cryosphere
Julia N Chizhova, Yurij K Vasil’chuk,
Te isotopic characteristics of the pingo ice cores are considered. Te distribution of δ18O and δ2H values, dexc, δ18O–δ2H and δ2H–d exc relationships, and the ... and stages of the ice core growth. All pingos (Pestsovoye, Weather, Pingo-20) were formed in draining lake basins in ... water from which the ice of the Pestsovoye pingo was formed was heavier in values of δ18O ... for the ice of the core of the Pingo Weather it is 2.9 and 14.5‰, and 5.1 and 27.7‰ for the Pingo-20, respectively. In the ice cores of all ...
Tópico(s): Marine and environmental studies
2018 - Nauka | Journal Ice and Snow
ABSTRACT An isolated, eroding pingo at the southern end of Parry Peninsula, N.W.T., Canada was first photographed in about 1910. The photograph allows ... a century of landform change. Since 1910, the pingo crater pond has drained, the north side of the pingo has become well vegetated, the serrated crest has ... ft (15–17 m). The erosion of the pingo has probably been dominated by the strong southerly ... the vegetation on the south side of the pingo is poorly developed in comparison with the north ... foxes ( Vulpes lagopus ) on the slopes of the pingo. It is unusual to detect change of collapsed ...
Tópico(s): Geology and Paleoclimatology Research
2011 - Wiley | Permafrost and Periglacial Processes
Pingos are small hills with cores of ice, formed by injection and freezing of pressurized water. The possibility of pingos on Mars is of particular interest because of ... liquid water. We have systematically searched for candidate pingos using images from the High Resolution Imaging Science Experiment (HiRISE) camera. Since pingos are expected to develop surface fractures due to ... hemisphere match the general morphologic characteristics of terrestrial pingos and are the best candidates for martian pingos, ...
Tópico(s): Space Science and Extraterrestrial Life
2009 - Elsevier BV | Icarus
Neil Ross, Peter Brabham, Charles Harris, Hanne H. Christiansen,
... the geometry and internal structure of open system pingos in Adventdalen, Svalbard using electrical resistivity tomography. A ... be made between the electrical properties of the pingos investigated, depending upon whether they are located either above (Innerhytte pingo) or below (Hytte and Longyear pingos) the maximum Holocene marine limit. The resistivity profile at Innerhytte pingo was characterised by high values of resistivity [Formula: ... ice. The electrical resistivity of Hytte and Longyear pingos, both developed within fine-grained, saline marine clays, ...
Tópico(s): Geophysical and Geoelectrical Methods
2007 - | Journal of Environmental and Engineering Geophysics
Morten Rasch, Birger Ulf Hansen, Ole Humlum, Niels Nielsen, Peter Funch, Stephen D. Gurney, Peter Worsley, Hanne H. Christiansen,
... during 1996. Open system, or more correctly, hydraulic pingos, are genetically poorly understood. A continuing problem concerns ... Island has suggested a new type of hydraulic pingo developing only in a “marsh environment”. It is ... these features and that they are simply hydraulic pingos. Abstract A group of marsh initiated open system pingo remnants from the Iterdlagssûp kûgssua valley mouth, in ... state that the location of this group of pingo remnants in the Iterdlagssûp kûgssua valley mouth is ... and Worsley (1997) on the Iterdlagssûp kûgssua valley pingos are commented, and it is argued by way ...
Tópico(s): Methane Hydrates and Related Phenomena
1997 - Taylor & Francis | Geografisk Tidsskrift-Danish Journal of Geography
Ibyuk Pingo, which is 49 m high and 300 m in basal diameter, is one of the largest pingos in the world. Precise surveys carried out for ... period indicate that the lower half of the pingo, below a height of 25 m, shows no ... based upon the depth of permafrost near the pingo, radiocarbon dating of wood in the pingo overburden, heat conduction theory, and the measured growth ... an age of about 1300 ± 200 yr. Ibyuk Pingo is in an unstable state and collapse could ... study of the potential collapse pattern of Ibyuk Pingo suggests a number of criteria that might be ...
Tópico(s): Geology and Paleoclimatology Research
1986 - Cambridge University Press | Quaternary Research
A field study of pingo ice exposures shows that all pingos contain pore ice and varying proportions of intrusive ice, segregated ice, dilation crack ice, ... axis upon exposure to radiation. Precise surveys of pingo growth for the 1973–1983 period show that ... surface water and also with soil from the pingo overburden. The cumulative width of the dilation crack ice approximates the stretch of the pingo overburden as it is domed by pingo growth. Dilation crack ice is vertically banded. The ... based upon the 1973–1983 growth of one pingo with an intrusive ice core show that the ...
Tópico(s): Methane Hydrates and Related Phenomena
1985 - NRC Research Press | Canadian Journal of Earth Sciences