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Permafrost thaw‐related slope failures in Alaska’s Arctic National Parks, c. 1980–2019 Permafr. Periglac. Process. (IF 2.701) Pub Date : 2021-01-20 David K. Swanson
Active‐layer detachments (ALD) and retrogressive thaw slumps (RTS) are landslides that occur as a result of thaw in permafrost regions. I mapped the extent of bare soil exposed in these thaw‐related slope failures in four study areas with continuous permafrost in Alaska’s Arctic National Parks, on mosaics of aerial photographs from 1977–1985 (sampling episode 1), satellite images from 2006–2009 (sampling
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Evidence of permafrost in the Paleoproterozoic (c. 1.9 Ga) of Central Sweden Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-12-17 Jef Vandenberghe; Gerrit Kuipers; Frank F. Beunk; Keewook Yi; Frederik M. van der Wateren
This paper reports on an ice‐wedge pseudomorph that formed and is preserved in metavolcanic host material that was later transformed to metamorphic solid bedrock. It has been dated to 1895 ± 5 Ma by U–Pb geochronology of zircon in the bedrock, an Early Proterozoic age. Detailed observation of the deformation structures of the wedge points to an ice‐wedge pseudomorph based on typical downbending around
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Pollen as a potential indicator of the origin of massive ice in northwest Siberia Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-12-11 Alla C. Vasil'chuk; Yurij K. Vasil'chuk
Pollen and spores collected from massive ice bodies in northwest Siberia were studied with the aim to provide a cryogenic indication of their origin. We discuss perennial massive ice, which may occur as lenses, layers, or irregular masses in the frozen ground and may be buried or intrasedimental. Pollen assemblages in massive ice deposits of Holocene age indicated a nonglacial origin of the ice. Pollen
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A general theory of rock glacier creep based on in‐situ and remote sensing observations Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-12-04 Alessandro Cicoira; Marco Marcer; Isabelle Gärtner‐Roer; Xavier Bodin; Lukas U. Arenson; Andreas Vieli
The ongoing acceleration in rock glacier velocities concurrent with increasing air temperatures, and the widespread onset of rock glacier destabilization have reinforced the interest in rock glacier dynamics and in its coupling to the climate system. Despite the increasing number of studies investigating this phenomenon, our knowledge of both the fundamental mechanisms controlling rock glacier dynamics
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Field investigation on the influence of periglacial processes on pile foundations on the Qinghai–Tibet plateau Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-12-01 Lei Guo; Yanhui You; Qihao Yu; Zhaoyun Shi; Hongbi Li; Xinbin Wang
Periglacial processes can threaten the operation of engineering infrastructure. Based on field observations, the influence of four types of periglacial processes on tower foundations along the Qinghai–Tibet Engineering Corridor were investigated. These periglacial processes change the local thermal and hydraulic processes in soils around the pile foundations, thereby threatening their stability. Frost
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Permafrost warming near the northern limit of permafrost on the Qinghai–Tibetan Plateau during the period from 2005 to 2017: A case study in the Xidatan area Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-11-17 Guangyue Liu; Changwei Xie; Lin Zhao; Yao Xiao; Tonghua Wu; Wu Wang; Wenhui Liu
Permafrost that exists near the boundary of the permafrost zone is generally more sensitive to climate change. By analyzing ground temperatures observed from two 30‐m‐deep boreholes, a case study was conducted to present some characteristics of recent permafrost warming in the Xidatan area, near the northern limit of the permafrost zone on the Qinghai–Tibetan Plateau. The rate of permafrost degradation
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10Be exposure age for sorted polygons in the Sudetes Mountains Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-11-16 Zbyněk Engel; Marek Křížek; Régis Braucher; Tomáš Uxa; David Krause;
Patterned‐ground landforms represent the most common phenomenon of periglacial environment, and their large sorted forms belong to the few morphological indicators of past permafrost distribution. The relic forms of patterned ground are widespread on high‐elevated surfaces in the central European uplands, providing the evidence of regional periglacial conditions in the last glacial period. However
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Thermo‐erosional valleys in Siberian ice‐rich permafrost Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-10-28 Anne Morgenstern; Pier Paul Overduin; Frank Günther; Samuel Stettner; Justine Ramage; Lutz Schirrmeister; Mikhail N. Grigoriev; Guido Grosse
Thermal erosion is a major mechanism of permafrost degradation, resulting in characteristic landforms. We inventory thermo‐erosional valleys in ice‐rich coastal lowlands adjacent to the Siberian Laptev Sea based on remote sensing, Geographic Information System (GIS), and field investigations for a first regional assessment of their spatial distribution and characteristics. Three study areas with similar
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Cover Image Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-10-23 Kenji Yoshikawa; Jose Úbeda; Pablo Masías; Walter Pari; Fredy Apaza; Pool Vasquez; Beto Ccallata; Ronald Concha; Gonzalo Luna; Joshua Iparraguirre; Isabel Ramos; Gustavo De la Cruz; Rolando Cruz; Ramón Pellitero; Martí Bonshoms
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Issue Information Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-10-23
No abstract is available for this article.
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Carbon dioxide emissions from periglacial patterned ground under changing permafrost conditions and shrub encroachment in an alpine landscape, Jotunheimen, Norway Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-08-18 Helen Hallang; John F. Hiemstra; Sietse O. Los; John A. Matthews; Cynthia A. Froyd
Whether Arctic and alpine ecosystems will act as a future net sink or source of carbon remains uncertain. The present study investigates ways in which ecosystem (soil and vegetation) and geomorphological (cryogenic disturbance) factors may control or affect the future release of carbon in an alpine permafrost landscape. Rates of ecosystem respiration (Re) were examined using a portable gas analyzer
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Active layer thickening and controls on interannual variability in the Nordic Arctic compared to the circum‐Arctic Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-10-14 Sarah M. Strand; Hanne H. Christiansen; Margareta Johansson; Jonas Åkerman; Ole Humlum
Active layer probing in northern Sweden, northeast Greenland, and central Svalbard indicates active layer thickening has occurred at Circumpolar Active Layer Monitoring (CALM) sites with long‐term, continuous observations, since the sites were established at these locations in 1978, 1996, and 2000, respectively. The study areas exhibit a reverse latitudinal gradient in average active layer thickness
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Utilizing the TTOP model to understand spatial permafrost temperature variability in a High Arctic landscape, Cape Bounty, Nunavut, Canada Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-10-03 Madeleine C. Garibaldi; Philip P. Bonnaventure; Scott F. Lamoureux
Ground surface and permafrost temperatures in the High Arctic are often considered homogeneous especially when viewed at the scale of climate and environmental models. However, this is generally incorrect due to highly variable, topographically redistributed snow cover, which generates a substantial degree of ground thermal heterogeneity. The objective of this study is to describe and spatially model
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Spatial and stratigraphic variation of near‐surface ground ice in discontinuous permafrost of the taiga shield Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-09-04 Jason R. Paul; Steven V. Kokelj; Jennifer L. Baltzer
The acceleration of permafrost thaw due to warming, wetting, and disturbance is altering circumpolar landscapes. The effect of thaw is largely determined by ground ice content in near‐surface permafrost, making the characterization and prediction of ground ice content critical. Here we evaluate the spatial and stratigraphic variation of near‐surface ground ice characteristics in the dominant forest
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Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-08-26 Ruixia He; Huijun Jin; Hugh M. French; Jef Vandenberghe; Xiaoying Li; Fang Li; Guanli Jiang; Ze Zhang; Xuemei Chen; Raul D. Serban; Shaoling Wang; Dongxin Guo
During the last 50 ka, cryogenic wedges on the Ordos Plateau formed during three major periods: (i) early local Last Glaciation, ca. 50 ka BP; (iii) local Last Permafrost Maximum(local LPM), 25–19 ka BP; and (v) post‐local LPM, 16–9 ka BP. Cryoturbations mainly formed in the following periods: (ii) pre‐local LPM, 45–30 ka BP and (iv) ~ 20 ka BP. The coldest periods with well‐developed permafrost (i
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Study on ice nucleation temperature and water freezing in saline soils Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-08-19 Xusheng Wan; Enlong Liu; Enxi Qiu
This paper presents a computational model of the freezing point of soil and the nucleation rate of ice based on the soil volume for saline soils. Physicochemical methods and crystallization theory are used to explore the macroscopic mechanism of water freezing induced by ice crystallization, and the influence of water undercooling is discussed with regard to different soil volumes and salt contents
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A characteristic periglacial landform: Automated recognition and delineation of cryoplanation terraces in eastern Beringia Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-08-19 Clayton W. Queen; Frederick E. Nelson; Grant E. Gunn; Kelsey E. Nyland
Automated recognition and delineation of specific landforms and their constituent elements ranks among the most active areas of contemporary geomorphological research. This study contributes to that literature by applying semi‐ and fully automated recognition procedures to upland periglacial geomorphic landscapes. The Cryoplanation Terrace semi‐Automated Recognition (CTAR) algorithm utilizes basic
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Cover Image Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-27 Michael Angelopoulos, Pier P. Overduin, Frederieke Miesner, Mikhail N. Grigoriev, Alexander A. Vasiliev
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Issue Information Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-27
No abstract is available for this article.
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Holocene pore‐ice δ18O and δ2H records from drained thermokarst lake basins in the Old Crow Flats, Yukon, Canada Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-23 Sasiri Bandara; Duane Froese; Trevor J. Porter; Fabrice Calmels
Thermokarst lakes form following the thaw of ice‐rich permafrost and drain after a few decades to millennia. Drained thermokarst lake basins (DTLBs) become epicenters for peat accumulation and re‐aggradation of ice‐rich permafrost. This re‐aggradation of permafrost may be interrupted by subsequent thermokarst lake formation with sufficient disturbance. Thermokarst lakes and DTLBs are abundant near
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A model for stable isotopes of residual liquid water and ground ice in permafrost soils using arbitrary water chemistries and soil‐specific empirical residual water functions Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-21 David A. Fisher; Denis Lacelle; Wayne Pollard; Benoit Faucher
We present the basic theory of stable isotopes (δ(18O) and δ(D)) of freezing water solutions in the environment set within a water isotope‐augmented version of FREZCHEM(V15). We validate this model with a couple of examples. The isotope‐capable FREZCHEM is simplified to run much faster using set‐piece initial chemistries to calculate the freezing temperature of the remaining water. The fast version
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Study on the mechanism of crystallization deformation of sulfate saline soil during the unidirectional freezing process Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-20 Jing Zhang; Yuanming Lai; Yanhu Zhao; Shuangyang Li
The freezing of sulfate saline soil involves the coupling effect of heat and mass transfer and crystallization deformation. The influence of salt content and temperature on the crystallization of ice and salt was analyzed by using a one‐side freezing experiment. Based on the effect of solute and temperature on water activity, a crystallization kinetics model of ice–water phase change in saline soil
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Detection of the freezing state and frozen section thickness of fine sand by ultrasonic testing Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-16 Ji‐wei Zhang; Julian Murton; Shu‐jie Liu; Li‐li Sui; Song Zhang
Determining the freezing state and frozen section thickness is fundamental to assessing the development of artificial frozen walls but is commonly difficult or inaccurate because of a limited number and fixed position of thermometer holes under complex field conditions. We report a novel experimental design that measures soil temperature, water content, and ultrasonic properties to monitor movement
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Method for calculating the liquid water fraction of saline soil during the freezing process Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-11 Zean Xiao; Yuanming Lai; Jun Zhang
The liquid water fraction is one of the most important parameters in the study of saline soils of cold regions, and has great influence on water migration. The freezing temperature and saturated concentration of pore solutions have been investigated according to thermodynamic theory, indicating that pore radius, temperature, and salt concentration are the three main influencing factors. Here, a method
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Recent advances in the study of Arctic submarine permafrost Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-13 Michael Angelopoulos, Pier P. Overduin, Frederieke Miesner, Mikhail N. Grigoriev, Alexander A. Vasiliev
Submarine permafrost is perennially cryotic earth material that lies offshore. Most submarine permafrost is relict terrestrial permafrost beneath the Arctic shelf seas, was inundated after the last glaciation, and has been warming and thawing ever since. As a reservoir and confining layer for gas hydrates, it has the potential to release greenhouse gasses and impact coastal infrastructure, but its
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Modeling thermal regime and evolution of the methane hydrate stability zone of the Yamal peninsula permafrost Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-07-09 Maxim M. Arzhanov; Valentina V. Malakhova; Igor I. Mokhov
In recent years, new geophysical phenomena have been observed in the high‐latitude regions of continental permafrost. Since 2014 new craters 10–20 m in diameter have been found within the Yamal Peninsula and neighboring regions. They are associated with the emissions of gases, which could have been formed during dissociation of relict gas hydrate deposits due to increases in soil temperature. This
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Rock glaciers automatic mapping using optical imagery and convolutional neural networks Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-06-22 Marco Marcer
Despite their relevance in alpine environments, rock glaciers remain uncharted in several regions of the globe due to the considerable efforts required in the mapping process. To develop a support tool for rock glacier mapping, this study investigates the feasibility using artificial intelligence to recognize these landforms on satellite optical imagery. The results of this exploratory analysis indicate
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Growing season CO2 exchange and evapotranspiration dynamics among thawing and intact permafrost landforms in the Western Hudson Bay lowlands Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-06-08 Felix C. Nwaishi; Matthew Q. Morison; Brandon Van Huizen; Myroslava Khomik; Richard M. Petrone; Merrin L. Macrae
Warming conditions across Canada's subarctic and arctic regions are causing permafrost landforms to thaw, resulting in rapid land cover change, including conversion of peat plateaus to wetland and thermokarst. These changes have important implications for northern ecosystems, including shifting controls on carbon uptake and release functions, as well as altering evapotranspiration (ET) rates, which
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Landscape matters: Predicting the biogeochemical effects of permafrost thaw on aquatic networks with a state factor approach Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-27 Suzanne E. Tank, Jorien E. Vonk, Michelle A. Walvoord, James W. McClelland, Isabelle Laurion, Benjamin W. Abbott
Permafrost thaw has been widely observed to alter the biogeochemistry of recipient aquatic ecosystems. However, research from various regions has shown considerable variation in effect. In this paper, we propose a state factor approach to predict the release and transport of materials from permafrost through aquatic networks. Inspired by Hans Jenny's seminal description of soil‐forming factors, and
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Reconstructing cold climate paleoenvironments from micromorphological analysis of relict slope deposits (Serra da Estrela, Central Portugal) Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-26 Alexandre Nieuwendam; Gonçalo Vieira; Carlos Schaefer; Barbara Woronko; Margareta Johansson
The paper focuses on analysis of macro‐ and micromorphological characteristics of relict slope deposits in Serra da Estrela (Portugal) to understand the significance of different slope processes and paleoenvironmental settings. Micromorphology is a useful sedimentology technique allowing significant advances compared to macroscopic techniques. Results show that different processes are involved in the
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The distribution and dynamics of aufeis in permafrost regions Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-23 Timothy Ensom, Olga Makarieva, Peter Morse, Douglas Kane, Vladimir Alekseev, Philip Marsh
Aufeis, also known as an icing or naled, is an accumulation of ice that forms primarily during winter when water is expelled onto frozen ground or ice surfaces and freezes in layers. Process‐oriented aufeis research initially expanded in the 20th century, but recent interest in changing hydrological conditions in permafrost regions has rejuvenated this field. Despite its societal relevance, the controls
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An effective approach for mapping permafrost in a large area using subregion maps and satellite data Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-22 Jianan Hu; Shuping Zhao; Zhuotong Nan; Xiaobo Wu; Xuehui Sun; Guodong Cheng
Permafrost distribution maps are of importance for environmental assessment, climate system modeling, and practical engineering applications. The scarcity of forcing data and parameters often limits the uses of permafrost models over large areas. However, detailed data are often available in a few subregions through field investigations. In this study, we propose a novel approach for mapping permafrost
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Current thermal state of permafrost in the southern Peruvian Andes and potential impact from El Niño–Southern Oscillation (ENSO) Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-19 Kenji Yoshikawa; Jose Úbeda; Pablo Masías; Walter Pari; Fredy Apaza; Pool Vasquez; Beto Ccallata; Ronald Concha; Gonzalo Luna; Joshua Iparraguirre; Isabel Ramos; Gustavo De la Cruz; Rolando Cruz; Ramón Pellitero; Martí Bonshoms
Tropical high‐mountain permafrost has a unique thermal regime due to its exposure to strong solar radiation and to rough surface snow morphology, which reduce ground heat transfer from the surface. Latent heat transfer and higher albedo that occur during the snow‐covered season contribute to positive feedback that supports the presence of permafrost. This preliminary study reports on the thermal state
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Changing climate and the permafrost environment on the Qinghai–Tibet (Xizang) plateau Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-18 Lin Zhao, Defu Zou, Guojie Hu, Erji Du, Qiangqiang Pang, Yao Xiao, Ren Li, Yu Sheng, Xiaodong Wu, Zhe Sun, Lingxiao Wang, Chong Wang, Lu Ma, Huayun Zhou, Shibo Liu
Permafrost on the Qinghai–Tibet Plateau (QTP) has undergone degradation as a result of recent climate change. This may alter the thermo‐hydrological processes and unlock soil organic carbon, and thereby affect local hydrological, ecological, and climatic systems. The relationships between permafrost and climate change have received extensive attention, and in this paper we review climate change for
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Engineering in the rugged permafrost terrain on the roof of the world under a warming climate Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-18 Qingbai Wu, Yu Sheng, Qihao Yu, Ji Chen, Wei Ma
Permafrost is sensitive to both climate warming and engineering disturbance on the Qinghai–Tibet Plateau (QTP). These factors degrade the stability of infrastructure built on permafrost and reduce its service life. To counter these effects, cooling of the subgrade to lower permafrost temperature forms part of the engineering design on the QTP. Proactive cooling of the subgrade has been used in construction
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Transportable system for on‐site calibration of permafrost temperature sensors Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-18 Andrea Merlone; Francesca Sanna; Graziano Coppa; Laura Massano; Chiara Musacchio
Evaluating the degradation of permafrost is a major challenge in understanding global warming and its impact on the cryosphere. The Global Cryosphere Watch is promoting actions towards data quality and traceability, to achieve comparability of observations from different permafrost stations. In response to this, a transportable system for on‐site calibrations of permafrost temperature sensors was studied
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Periglacial slopewash dominated by solute transfers and subsurface erosion on a High Arctic slope Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-16 Michel Paquette; Daniel Fortier; Melissa Lafrenière; Warwick F. Vincent
Arctic slope hydrology studies suggest that water follows preferential subsurface flow paths known as water tracks. While subsurface flow is usually expected to transport only dissolved solids, periglacial studies have indicated some evidence of lessivage associated with flow through sorted patterned ground. We investigated the transport of dissolved and suspended sediments in water tracks on a polar
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Recent advances (2010–2019) in the study of taliks Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-06 H. Brendan O’Neill, Pascale Roy‐Leveillee, Liudmila Lebedeva, Feng Ling
Taliks are bodies or layers of unfrozen ground in permafrost areas. Recent research on taliks has been driven largely by the potential for release of greenhouse gases as taliks expand, and engineering challenges associated with thawing permafrost. Observations of talik configuration and development have been assisted by advances in geophysical techniques that complement mechanical and thermal measurements
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Inherited periglacial geomorphology of a basalt hill in the Sudetes, Central Europe: Insights from LiDAR‐aided landform mapping Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-05-05 Piotr Migoń; Kacper Jancewicz; Marek Kasprzak
This paper presents the results of mapping inherited cold‐climate landforms and deposits at the Muchów Hills site in the Sudetes, Central Europe (51°N). Bedrock supporting the upper slopes is basalt, with well‐developed columnar jointing, and local relief is of the order of 100 m, whereas the middle and lower slopes are underlain by glacigenic deposits. Characteristic cold‐climate landforms include
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Issue Information Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-04-27
No abstract is available for this article.
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Hot trends and impact in permafrost science Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-04-27 Ylva Sjöberg; Matthias B. Siewert; Ashley C.A. Rudy; Michel Paquette; Frédéric Bouchard; Julie Malenfant‐Lepage; Michael Fritz
An increased interest in Arctic environments, mainly due to climate change, has changed the conditions for permafrost research in recent years. This change has been accompanied by a global increase in scientific publications, as well as a trend towards open access publications. We have analyzed abstracts, titles and keywords for publications on permafrost from 1998 to 2017 to identify developments
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Recent advances in paleoclimatological studies of Arctic wedge‐ and pore‐ice stable‐water isotope records Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-04-19 Trevor J. Porter, Thomas Opel
Late Pleistocene and Holocene ground ice are common throughout the Arctic. Some forms of relict ground ice preserve local meteoric water, and their stable oxygen‐ and hydrogen‐isotope ratios can be used to reconstruct past air temperatures. In this paper, we review the formation and sampling of two forms of relict ground ice—wedge ice and pore ice—and recent (2010–2019) advances in paleoclimatological
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Profile distributions of soil organic carbon fractions in a permafrost region of the Qinghai–Tibet Plateau Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-04-08 Zi‐Qiang Yuan; Hui‐Jun Jin; Qing‐Feng Wang; Qing‐Bai Wu; Guo‐Yu Li; Xiao‐Ying Jin; Qiang Ma
Adequate characterization of soil organic carbon (SOC) fractions is essential to elucidate carbon dynamics in permafrost‐affected ecosystems. SOC and its fractions were investigated across alpine ecosystems, including alpine swamp meadows (ASM), alpine meadows (AM) and alpine steppes (AS), in permafrost regions on the Qinghai–Tibet Plateau (QTP), southwest China. The density separation method was used
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Permafrost research in China related to express highway construction Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-04-08 Shuangjie Wang, Fujun Niu, Jianbing Chen, Yuanhong Dong
Express highways are roads of high speed, large capacity, and transportation flexibility. The network of express highways in China has been developed over the last 30 years to accommodate the needs of a growing population and to facilitate economic development. Part of the network is in permafrost regions, where the construction and maintenance of these roads present significant engineering challenges
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Hydrological impacts of near‐surface soil warming on the Tibetan Plateau Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-03-26 Li Liu, Wenjiang Zhang, Qifeng Lu, Huiru Jiang, Yi Tang, Hongmin Xiao, Genxu Wang
Climate warming can cause intense changes in regional soil freeze/thaw dynamics and thus exerts strong effects on hydrological processes. Because permafrost conditions vary widely across the Tibetan Plateau (TP), a better understanding the potential influences of permafrost types is helpful to project future hydrological changes. Using multilayer soil temperatures from 45 meteorological stations, this
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Periglacial water paths within a rock glacier‐dominated catchment in the Stepanek area, Central Andes, Mendoza, Argentina Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-03-12 Dario Trombotto Liaudat, Noelia Sileo, Cristina Dapeña
In the region of the Stepanek rock glacier (69°19′/69°26′W, 32°55′/32°59′S), in the Province of Mendoza, Argentina, seasonal hydrochemical monitoring was carried out between 2013 and 2017. This paper describes underground and surface water flow, and their hydrochemistry, and provides an overview of how groundwater interacts with the rock glacier. The cryogenic basin of the study area where the hydrological
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Impact of wildfire on permafrost landscapes: A review of recent advances and future prospects Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-03-10 Jean E. Holloway, Antoni G. Lewkowicz, Thomas A. Douglas, Xiaoying Li, Merritt R. Turetsky, Jennifer L. Baltzer, Huijun Jin
Changes in the frequency and extent of wildfires are expected to lead to substantial and irreversible alterations to permafrost landscapes under a warming climate. Here we review recent publications (2010–2019) that advance our understanding of the effects of wildfire on surface and ground temperatures, on active layer thickness and, where permafrost is ice‐rich, on ground subsidence and the development
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Winter air temperature during the Holocene optimum in the north‐eastern part of the east European plain based on ice wedge stable isotope records Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-03-10 Yurij K. Vasil'chuk, Nadine A. Budantseva, Alla C. Vasil'chuk, Julia N. Chizhova
Early Holocene winter air temperatures have been reconstructed for the north‐eastern part of the East European Plain using stable isotope (δ18O and δ2H) records of syngenetic ice wedges. We show that ice wedges here actively grew synchronously with accumulation of peatlands in bogged and forested depressions between 10 and 8 cal ka BP, corresponding to the early Holocene Thermal Maximum. The slope
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Taliks, cryopegs, and permafrost dynamics related to channel migration, Colville River Delta, Alaska Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-03-04 Eva Stephani, Jeremiah Drage, Duane Miller, Benjamin M. Jones, Mikhail Kanevskiy
Talik and cryopeg development related to channel migration has been observed in arctic deltas, but our knowledge on the configuration, properties, and rate of freezeback has remained limited. Along a main channel of the Colville River Delta (Alaska), we integrated subsurface data from 79 boreholes with a remote sensing analysis to measure channel changes in 1948–2013. We found that closed taliks occurred
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Experimental observations that simulated active‐layer deepening drives deeper rock fracture Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-27 Vikram Maji, Julian B. Murton
The impact of changes in active‐layer thickness on the depth of pervasive macrofracturing (brecciation) in frost‐susceptible bedrock is unclear but important to understanding its physical properties and geohazard potential. Here we report results from a laboratory experiment to test the hypothesis that active‐layer deepening drives an increase in the depth of brecciation. The experiment simulated active‐layer
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Ground temperature and snow depth variability within a subarctic peat plateau landscape Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-25 A. Britta K. Sannel
Subarctic permafrost peatlands cover extensive areas and store large amounts of soil organic carbon that can be remobilized as active layer deepening and thermokarst formation increase in a future warmer climate. Better knowledge of ground thermal variability within these ecosystems is important for understanding future landscape development and permafrost carbon feedbacks. In a peat plateau complex
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Observations and modelling of ground temperature evolution in the discontinuous permafrost zone in Nadym, north‐west Siberia Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-24 Ilmo T. Kukkonen, Elli Suhonen, Ekaterina Ezhova, Hanna Lappalainen, Victor Gennadinik, Olga Ponomareva, Andrey Gravis, Victoria Miles, Markku Kulmala, Vladimir Melnikov, Dmitry Drozdov
We analyze ground temperatures measured daily at depths of 0–10 m in the Nadym region, north‐west Siberia (65°18′N, 72°6′E). Nadym is located within the discontinuous permafrost zone and the forest–tundra transition subzone, thus representing an area threatened by permafrost thawing. Soil comprises a 0.4–1.0‐m‐thick topmost layer of peat with high porosity (~0.9), underlain by layers of mineral soil
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Issue Information Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21
No abstract is available for this article.
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Investigating the slope failures at the Lou rock glacier front, French Alps Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21 Marco Marcer, Steffen Ringsø Nielsen, Charles Ribeyre, Mario Kummert, Pierre‐Allain Duvillard, Philippe Schoeneich, Xavier Bodin, Kim Genuite
On August 14 2015 a large debris flow initiated by the occurrence of two slope failures at the front of the Lou rock glacier flooded part of the town of Lanslevillard, France. The present study aims to understand the meteorological and geomorphological context that led to these failures. Investigations were conducted by combining meteorological data, surface movements, and geophysical transects. The
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Changes in ice‐wedge activity over 25 years of climate change near Salluit, Nunavik (northern Québec, Canada) Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21 Samuel Gagnon, Michel Allard
To assess the direct impact of climate change on ice‐wedge (IW) degradation, 16 sites in the Narsajuaq river valley (Nunavik, Canada) that were extensively studied between 1989 and 1991 were revisited in 2016, 2017 and 2018. In total, 109 pits were dug to record soil characteristics and IW shapes and depths. Changes in surface conditions were also noted using side‐by‐side comparisons of recent (2017)
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Unmanned aerial vehicle‐based mapping of turf‐banked solifluction lobe movement and its relation to material, geomorphometric, thermal and vegetation properties Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21 Jana Eichel, Daniel Draebing, Teja Kattenborn, Johannes Antenor Senn, Lasse Klingbeil, Markus Wieland, Erik Heinz
Solifluction is one of the most widespread periglacial processes with low annual movement rates in the range of —millimeters to centimeters. Traditional methods to assess solifluction movement usually have low spatial resolution, which hampers our understanding of spatial movement patterns and the factors controlling them. In this study, we (a) test the applicability of unmanned aerial vehicle (UAV)‐based
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Identifying historical and future potential lake drainage events on the western Arctic coastal plain of Alaska Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21 Benjamin M. Jones, Christopher D. Arp, Guido Grosse, Ingmar Nitze, Mark J. Lara, Matthew S. Whitman, Louise M. Farquharson, Mikhail Kanevskiy, Andrew D. Parsekian, Amy L. Breen, Nori Ohara, Rodrigo Correa Rangel, Kenneth M. Hinkel
Arctic lakes located in permafrost regions are susceptible to catastrophic drainage. In this study, we reconstructed historical lake drainage events on the western Arctic Coastal Plain of Alaska between 1955 and 2017 using USGS topographic maps, historical aerial photography (1955), and Landsat Imagery (ca. 1975, ca. 2000, and annually since 2000). We identified 98 lakes larger than 10 ha that partially
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Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21 Antoine Boisson, Michel Allard, Denis Sarrazin
Emerging polar coasts have different geothermal regimes than those in submergence. While the scientific community is mainly concerned with rapidly eroding permafrost coastlines in sedimentary formations where relative sea level is rising, much less research has been dedicated to permafrost dynamics in emergent coastal regions where post‐glacial uplift is ongoing. The eastern Hudson Bay coast of Nunavik
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Simulation of heat–water–mechanics process in a freezing soil under stepwise freezing Permafr. Periglac. Process. (IF 2.701) Pub Date : 2020-02-21 Ruiqiang Bai, Yuanming Lai, Zhemin You, Jingge Ren
Frost heave is a process coupling heat transfer, water migration, water–ice phase change and deformation. Frost heave forms various landforms, such as frost mounds, ice pitons, sorted polygons and stone circles, and potentially induces a variety of engineering failures, such as building inclination, differential engineering foundation and pavement cracking. To understand the mechanism of frost heave
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