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Journal articles on the topic 'Ice-wedge polygons Patterned ground'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Levy, Joseph S., James W. Head, and David R. Marchant. "The role of thermal contraction crack polygons in cold-desert fluvial systems." Antarctic Science 20, no. 6 (2008): 565–79. http://dx.doi.org/10.1017/s0954102008001375.

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AbstractThermal contraction crack polygons modify the generation, transport, and storage of water in Wright Valley gullies. Water generation is contributed to by trapping of windblown snow in polygon troughs. Water transport is modified by changes to the ice-cement table and active layer topography caused by polygon trough formation. Water storage is modified by sediment grain-size distribution within polygons in gully distal hyporheic zones. Patterned ground morphological variation can serve as an indicator of fluvial modification, ranging from nearly unmodified composite-wedge polygons to po

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2

Levy, Joseph S., David R. Marchant, and James W. Head. "Distribution and origin of patterned ground on Mullins Valley debris-covered glacier, Antarctica: the roles of ice flow and sublimation." Antarctic Science 18, no. 3 (2006): 385–97. http://dx.doi.org/10.1017/s0954102006000435.

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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 (hexagonal) intersections, providing a time-series of polygon evolution within a single microclimate. We offer the following model for polygon formation and evolution in the Mullins Valley system. Near-verti

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3

Mellon, Michael T., Christopher P. Mckay, and Jennifer L. Heldmann. "Polygonal ground in the McMurdo Dry Valleys of Antarctica and its relationship to ice-table depth and the recent Antarctic climate history." Antarctic Science 26, no. 4 (2013): 413–26. http://dx.doi.org/10.1017/s0954102013000710.

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AbstractThe occurrence of dry permafrost overlying ice-rich permafrost is unique to the Antarctic Dry Valleys on Earth and to the high latitudes of Mars. The stability and distribution of this ice are poorly understood and fundamental to understanding the Antarctic climate as far back as a few million years. Polygonal patterned ground is nearly ubiquitous in these regions and is integrally linked to the history of the icy permafrost and climate. We examined the morphology of polygonal ground in Beacon Valley and the Beacon Heights region of the Antarctic Dry Valleys, and show that polygon size

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4

Frost, Gerald, Tracy Christopherson, M. Jorgenson, et al. "Regional Patterns and Asynchronous Onset of Ice-Wedge Degradation since the Mid-20th Century in Arctic Alaska." Remote Sensing 10, no. 8 (2018): 1312. http://dx.doi.org/10.3390/rs10081312.

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Ice-wedge polygons are widespread and conspicuous surficial expressions of ground-ice in permafrost landscapes. Thawing of ice wedges triggers differential ground subsidence, local ponding, and persistent changes to vegetation and hydrologic connectivity across the landscape. Here we characterize spatio-temporal patterns of ice-wedge degradation since circa 1950 across environmental gradients on Alaska’s North Slope. We used a spectral thresholding approach validated by field observations to map flooded thaw pits in high-resolution images from circa 1950, 1982, and 2012 for 11 study areas (157

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5

Walters, James C. "Ice-wedge casts and relict polygonal patterned ground in North-East Iowa, USA." Permafrost and Periglacial Processes 5, no. 4 (1994): 269–81. http://dx.doi.org/10.1002/ppp.3430050406.

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6

Hallet, Bernard, Ron Sletten, and Kevin Whilden. "Micro-relief development in polygonal patterned ground in the Dry Valleys of Antarctica." Quaternary Research 75, no. 2 (2011): 347–55. http://dx.doi.org/10.1016/j.yqres.2010.12.009.

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AbstractPolygonal patterned ground in polar regions of both Earth and Mars has received considerable attention. In comparison with the size, shape, and arrangement of the polygons, the diverse micro-relief and topography (termed here simply “relief”) of polygonal patterned ground have been understudied. And yet, the relief reflects important conditions and processes occurring directly below the ground surface, and it can be observed readily in the field and through remote sensing. Herein, we describe the relief characteristic of the simplest and relatively young form of patterned ground in the

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7

Swanger, Kate M. "Buried ice in Kennar Valley: a late Pleistocene remnant of Taylor Glacier." Antarctic Science 29, no. 3 (2017): 239–51. http://dx.doi.org/10.1017/s0954102016000687.

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AbstractBuried glacier ice is common in the McMurdo Dry Valleys and under ideal climatic and geomorphological conditions may be preserved for multimillion-year timescales. This study focuses on the analysis of ~300 m2 of buried glacier ice in lower Kennar Valley, Quartermain Range. The mapped ice is clean,<10 m thick and covered by a~25 cm sandy drift. The mouth of Kennar Valley is occupied by a lobe of Taylor Glacier, an outlet glacier from Taylor Dome. Based on ice–sediment characteristics, air bubble concentrations and stable isotopic analyses from three ice cores, the lower Kennar Valle

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8

Balme, M. R., C. J. Gallagher, and E. Hauber. "Morphological evidence for geologically young thaw of ice on Mars: A review of recent studies using high-resolution imaging data." Progress in Physical Geography: Earth and Environment 37, no. 3 (2013): 289–324. http://dx.doi.org/10.1177/0309133313477123.

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Liquid water is generally only meta-stable on Mars today; it quickly freezes, evaporates or boils in the cold, dry, thin atmosphere (surface pressure is about 200 times lower than on Earth). Nevertheless, there is morphological evidence that surface water was extensive in more ancient times, including the Noachian Epoch (∼4.1 Ga to ∼3.7 Ga bp), when large lakes existed and river-like channel networks were incised, and early in the Hesperian Epoch (∼3.7 Ga to ∼2.9 Ga bp), when megafloods carved enormous channels and smaller fluvial networks developed in association with crater-lakes. However, b

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9

Abolt, Charles J., Michael H. Young, Adam L. Atchley, and Dylan R. Harp. "Microtopographic control on the ground thermal regime in ice wedge polygons." Cryosphere 12, no. 6 (2018): 1957–68. http://dx.doi.org/10.5194/tc-12-1957-2018.

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Abstract. The goal of this research is to constrain the influence of ice wedge polygon microtopography on near-surface ground temperatures. Ice wedge polygon microtopography is prone to rapid deformation in a changing climate, and cracking in the ice wedge depends on thermal conditions at the top of the permafrost; therefore, feedbacks between microtopography and ground temperature can shed light on the potential for future ice wedge cracking in the Arctic. We first report on a year of sub-daily ground temperature observations at 5 depths and 9 locations throughout a cluster of low-centered po

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10

Godin, Etienne, Daniel Fortier, and Esther Lévesque. "Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland." Biogeosciences 13, no. 5 (2016): 1439–52. http://dx.doi.org/10.5194/bg-13-1439-2016.

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Abstract. Low-center polygonal terrains with gentle sloping surfaces and lowlands in the high Arctic have a potential to retain water in the lower central portion of ice-wedge polygons and are considered high-latitude wetlands. Such wetlands in the continuous permafrost regions have an important ecological role in an otherwise generally arid region. In the valley of the glacier C-79 on Bylot Island (Nunavut, Canada), thermal erosion gullies were rapidly eroding the permafrost along ice wedges affecting the integrity of the polygons by breaching and collapsing the surrounding rims. Intact polyg

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11

Nitzbon, Jan, Moritz Langer, Sebastian Westermann, Léo Martin, Kjetil Schanke Aas, and Julia Boike. "Pathways of ice-wedge degradation in polygonal tundra under different hydrological conditions." Cryosphere 13, no. 4 (2019): 1089–123. http://dx.doi.org/10.5194/tc-13-1089-2019.

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Abstract. Ice-wedge polygons are common features of lowland tundra in the continuous permafrost zone and prone to rapid degradation through melting of ground ice. There are many interrelated processes involved in ice-wedge thermokarst and it is a major challenge to quantify their influence on the stability of the permafrost underlying the landscape. In this study we used a numerical modelling approach to investigate the degradation of ice wedges with a focus on the influence of hydrological conditions. Our study area was Samoylov Island in the Lena River delta of northern Siberia, for which we

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12

Johnson, W. Hilton. "Ice-Wedge Casts and Relict Patterned Ground in Central Illinois and their Environmental Significance." Quaternary Research 33, no. 1 (1990): 51–72. http://dx.doi.org/10.1016/0033-5894(90)90084-x.

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AbstractSediment features and soil patterns indicate that permafrost developed beyond the late Wisconsinan (Woodfordian) ice margin in Illinois. Vertical wedge-shaped bodies in Woodfordian glacigenic deposits and buried by Woodfordian loess are interpreted to be ice-wedge casts. Large-scale patterned ground, common on the late Wisconsinan drift plain and on the Illinoian drift plain to the south and west, also is interpreted to be the result of ice-wedge formation. Permafrost extended to about 38° 30′ N latitude and formed during the interval from about 21,000 to 16,000 yr B.P. Formation and d

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13

Campbell-Heaton, Kethra, Denis Lacelle, David Fisher, and Wayne Pollard. "Holocene ice wedge formation in the Eureka Sound Lowlands, high Arctic Canada." Quaternary Research 102 (February 23, 2021): 175–87. http://dx.doi.org/10.1017/qua.2020.126.

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AbstractIce wedges are ubiquitous periglacial features in permafrost terrain. This study investigates the timing of ice wedge formation in the Fosheim Peninsula (Ellesmere and Axel Heiberg Islands). In this region, ice wedge polygons occupy ~50% of the landscape, the majority occurring below the marine limit in the Eureka Sound Lowlands. Numerical simulations suggest that ice wedges may crack to depths of 2.7–3.6 m following a rapid cooling of the ground over mean winter surface temperatures of −18°C to −38°C, corresponding to the depth of ice wedges in the region. The dissolved organic carbon

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14

Tsibizov, L. V., E. I. Esin, A. V. Grigorevskaya, and K. A. Sosnovtsev. "Magnetometry and ground penetrating radar in application to mapping of polygonal wedge ice of yedoma complex." Arctic and Antarctic Research 64, no. 4 (2018): 427–38. http://dx.doi.org/10.30758/0555-2648-2018-64-4-427-438.

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Paper is dedicated to geophysical mapping of polygonal wedge ice. Magnetometric and ground penetrating radar surveys were implemented on a small area of Yedoma ice complex on Kurungnakh island in Lena river delta. Such deposits are widely spread on a huge areas of Siberia and Alaska. The study was conducted near the thermoerosional gully, which propagates along the most thick ice wedges. Polygonal pattern is observable on high-resolution aerial imagery and digital elevation model - this data was used during the interpreting of obtained results. Study area (40×50 m) was covered with highresolut

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15

Perreault, Naïm, Esther Lévesque, Daniel Fortier, and Laurent J. Lamarque. "Thermo-erosion gullies boost the transition from wet to mesic tundra vegetation." Biogeosciences 13, no. 4 (2016): 1237–53. http://dx.doi.org/10.5194/bg-13-1237-2016.

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Abstract. Continuous permafrost zones with well-developed polygonal ice-wedge networks are particularly vulnerable to climate change. Thermo-mechanical erosion can initiate the development of gullies that lead to substantial drainage of adjacent wet habitats. How vegetation responds to this particular disturbance is currently unknown but has the potential to significantly disrupt function and structure of Arctic ecosystems. Focusing on three major gullies of Bylot Island, Nunavut, we estimated the impacts of thermo-erosion processes on plant community changes. We explored over 2 years the infl

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16

Jorgenson, M. T., and T. E. Osterkamp. "Response of boreal ecosystems to varying modes of permafrost degradation." Canadian Journal of Forest Research 35, no. 9 (2005): 2100–2111. http://dx.doi.org/10.1139/x05-153.

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Permafrost degradation associated with a warming climate is second only to wildfires as a major disturbance to boreal forests. Permafrost temperatures have risen to 4 °C since the “Little Ice Age”, resulting in widespread thawing of permafrost. The mode of permafrost degradation is highly variable, and its topographic and ecological consequences depend on the interaction of slope position, soil texture, hydrology, and ice content. We partitioned this variability into 16 primary modes: (1) thermokarst lakes from lateral thermomechanical erosion; (2) thermokarst basins after lake drainage; (3) t

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17

Hasan, A., M. R. Udawalpola, C. Witharana, and A. K. Liljedahl. "COUNTING ICE-WEDGE POLYGONS FROM SPACE: USE OF COMMERCIAL SATELLITE IMAGERY TO MONITOR CHANGING ARCTIC POLYGONAL TUNDRA." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIV-M-3-2021 (August 10, 2021): 67–72. http://dx.doi.org/10.5194/isprs-archives-xliv-m-3-2021-67-2021.

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Abstract. The microtopography associated with ice wedge polygons (IWPs) governs the Arctic ecosystem from local to regional scales due to the impacts on the flow and storage of water and therefore, vegetation and carbon. Increasing subsurface temperatures in Arctic permafrost landscapes cause differential ground settlements followed by a series of adverse microtopographic transitions at sub decadal scale. The entire Arctic has been imaged at 0.5 m or finer resolution by commercial satellite sensors. Dramatic microtopographic transformation of low-centered into high-centered IWPs can be identif

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18

Iwahana, Go, Robert C. Busey, and Kazuyuki Saito. "Seasonal and Interannual Ground-Surface Displacement in Intact and Disturbed Tundra along the Dalton Highway on the North Slope, Alaska." Land 10, no. 1 (2020): 22. http://dx.doi.org/10.3390/land10010022.

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Spatiotemporal variation in ground-surface displacement caused by ground freeze–thaw and thermokarst is critical information to understand changes in the permafrost ecosystem. Measurement of ground displacement, especially in the disturbed ground underlain by ice-rich permafrost, is important to estimate the rate of permafrost and carbon loss. We conducted high-precision global navigation satellite system (GNSS) positioning surveys to measure the surface displacements of tundra in northern Alaska, together with maximum thaw depth (TD) and surface moisture measurements from 2017 to 2019. The me

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19

Balks, M. R., and T. A. O’Neill. "Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic?" Cuadernos de Investigación Geográfica 42, no. 2 (2016): 415. http://dx.doi.org/10.18172/cig.2923.

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Soils in the Ross Sea Region of Antarctica generally comprise a surface desert pavement and a seasonally thawed active layer over permafrost. Most soils are formed on regolith such as glacial till or colluvium. Mean annual air temperatures range from -18°C to -24°C with low precipitation. The active layer ranges in depth from minimal in higher altitude, colder sites, to near 1 m deep at warmer coastal sites in the northern part of the region. Underlying permafrost may be ice-cemented, or dry with no ice cement. In some areas ice-cored moraine occurs where there is a large body of ice within th

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20

Nitzbon, Jan, Moritz Langer, Léo C. P. Martin, Sebastian Westermann, Thomas Schneider von Deimling, and Julia Boike. "Effects of multi-scale heterogeneity on the simulated evolution of ice-rich permafrost lowlands under a warming climate." Cryosphere 15, no. 3 (2021): 1399–422. http://dx.doi.org/10.5194/tc-15-1399-2021.

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Abstract. In continuous permafrost lowlands, thawing of ice-rich deposits and melting of massive ground ice lead to abrupt landscape changes called thermokarst, which have widespread consequences on the thermal, hydrological, and biogeochemical state of the subsurface. However, macro-scale land surface models (LSMs) do not resolve such localized subgrid-scale processes and could hence miss key feedback mechanisms and complexities which affect permafrost degradation and the potential liberation of soil organic carbon in high latitudes. Here, we extend the CryoGrid 3 permafrost model with a mult

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21

Lehmkuhl, Frank. "Modern and past periglacial features in Central Asia and their implication for paleoclimate reconstructions." Progress in Physical Geography: Earth and Environment 40, no. 3 (2015): 369–91. http://dx.doi.org/10.1177/0309133315615778.

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In the continental areas of Central and High Asia, periglacial landform assemblages, sediment structures and processes are mainly influenced and determined by of soil humidity during freeze–thaw cycles. These cryogenic processes result in periglacial landforms such as solifluction, earth hummocks or patterned ground. The distribution of rock glaciers as clear indicators of permafrost is additionally determined by rock fall or moraine debris composed of large boulders (e.g. of granite). Periglacial features were used to reconstruct past climatic conditions, e.g. relict involutions and ice-wedge

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22

Perreault, N., E. Lévesque, D. Fortier, and L. J. Lamarque. "Thermo-erosion gullies boost the transition from wet to mesic vegetation." Biogeosciences Discussions 12, no. 15 (2015): 12191–228. http://dx.doi.org/10.5194/bgd-12-12191-2015.

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Abstract. Continuous permafrost zones with well-developed polygonal ice-wedge networks are particularly vulnerable to climate change. Thermo-mechanical erosion can initiate the development of gullies that lead to substantial drainage of adjacent wet habitats. How vegetation responds to this particular disturbance is currently unknown but has the potential to strongly disrupt function and structure of Arctic ecosystems. Focusing on three major gullies of Bylot Island, Nunavut, we aimed at estimating the effects of thermo-erosion processes in shaping plant community changes. Over two years, we e

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23

Fortier, Daniel, Michel Allard, and Frédérique Pivot. "A late-Holocene record of loess deposition in ice-wedge polygons reflecting wind activity and ground moisture conditions, Bylot Island, eastern Canadian Arctic." Holocene 16, no. 5 (2006): 635–46. http://dx.doi.org/10.1191/0959683606hl960rp.

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24

Schwamborn, Georg, Christoph Manthey, Bernhard Diekmann, et al. "Late Quaternary sedimentation dynamics in the Beenchime-Salaatinsky Crater, Northern Yakutia." arktos 6, no. 1-3 (2020): 75–92. http://dx.doi.org/10.1007/s41063-020-00077-w.

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AbstractThe Beenchime-Salaatinsky Crater (BSC) is located west of the Olenyok River in Northern Yakutia, ~ 260 km south-west of Tiksi and the Lena Delta. The age and origin (volcanic versus meteoritic) of this crater is poorly understood. The key scientific interest in re-visiting the BSC is the reappraisal of the Quaternary sedimentation dynamics for a better understanding of the sediment history and thickness in the basin. This aides for an assessment, if the site is prospective for a deeper drilling of a Quaternary (or Cenozoic) sediment archive. Soil pits and auger cores from slopes and lo

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25

Witharana, C., M. A. E. Bhuiyan, and A. K. Liljedahl. "BIG IMAGERY AND HIGH PERFORMANCE COMPUTING AS RESOURCES TO UNDERSTAND CHANGING ARCTIC POLYGONAL TUNDRA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIV-M-2-2020 (November 17, 2020): 111–16. http://dx.doi.org/10.5194/isprs-archives-xliv-m-2-2020-111-2020.

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Abstract. Permafrost thaw has been observed at several locations across the Arctic tundra in recent decades; however, the pan-Arctic extent and spatiotemporal dynamics of thaw remains poorly explained. Thaw-induced differential ground subsidence and dramatic microtopographic transitions, such as transformation of low-centered ice-wedge polygons (IWPs) into high-centered IWPs can be characterized using very high spatial resolution (VHSR) commercial satellite imagery. Arctic researchers demand for an accurate estimate of the distribution of IWPs and their status across the tundra domain. The ent

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26

Wainwright, Haruko M., Anna K. Liljedahl, Baptiste Dafflon, et al. "Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods." Cryosphere 11, no. 2 (2017): 857–75. http://dx.doi.org/10.5194/tc-11-857-2017.

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Abstract. This paper compares and integrates different strategies to characterize the variability of end-of-winter snow depth and its relationship to topography in ice-wedge polygon tundra of Arctic Alaska. Snow depth was measured using in situ snow depth probes and estimated using ground-penetrating radar (GPR) surveys and the photogrammetric detection and ranging (phodar) technique with an unmanned aerial system (UAS). We found that GPR data provided high-precision estimates of snow depth (RMSE = 2.9 cm), with a spatial sampling of 10 cm along transects. Phodar-based approaches provided snow

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27

Sumina, O. I. "Сlassification of vegetation of baidzharakh massifs in two sites of the arctic tundra subzone in the Siberian sector of the Russian Arctic". Vegetation of Russia, № 39 (2020): 75–99. http://dx.doi.org/10.31111/vegrus/2020.39.75.

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One of the thermokarst relief forms is baidzharakh massif — the group of mounds separated by trenches formed as a result of the underground ice-wedge polygonal networks melting (Fig. 1). Study of baidzharakh vegetation took place on the northeast coast of the Taimyr Peninsula (the Pronchishcheva Bay area) and on the New Siberian Islands (the Kotelny Island) in 1973–1974 (Sumina, 1975, 1976, 1977a, b, 1979 et al.). The aim of this paper is to produce the classification of baidzharakh mound and trenches communities according to the Brown-Blanquet approach (Westhoff, Maarel, 1978) and to compare

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