Article
Geography, Physical
Katharina Schwarzkopf, Steffen Seitz, Michael Fritz, Thomas Scholten, Peter Kuehn
Summary: Ice wedge polygons on steep slopes in West Greenland are stable despite inclinations of over 30 degrees, and this stability is attributed to the soil hydrodynamics, local climate regime, and the presence of dense shrub tundra that absorbs water. This study highlights the importance of these factors in determining landscape stability and the intensity of solifluction processes in areas with geomorphological gradients and rising air temperatures.
PERMAFROST AND PERIGLACIAL PROCESSES
(2023)
Article
Multidisciplinary Sciences
Rachel C. Glade, Michael M. Fratkin, Mehdi Pouragha, Ali Seiphoori, Joel C. Rowland
Summary: Slow-moving arctic soils often organize into large-scale spatial patterns known as solifluction terraces and lobes. Mechanistic explanation for their formation has been lacking, but now research shows that soil cohesion and hydrostatic effects can lead to similar patterns. A large dataset from Norway supports theoretical predictions and reveals a newly observed climatic control on solifluction dynamics and patterns, providing insight into landscape dynamics.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geography, Physical
Koen Beerten, Erwin Meylemans, Cornelis Kasse, Thomas Mestdagh, David Van Rooij, Jan Bastiaens
Summary: A series of polygon networks were discovered in the most recent LiDAR DEM of Flanders, Belgium, resembling thermal contraction crack polygons from present-day permafrost regions. These networks were larger than present-day analogues and fossil networks in other regions. The networks showed a relationship between polygon type and local geomorphological position, with orthogonal networks developing near shallow valley slopes.
Article
Geography, Physical
Samuel Gagnon, Michel Allard
Summary: Simulation of permafrost thermal regime in Narsajuaq River Valley, Nunavik, Canada using the TONE model revealed that thermal contraction cracking and ice wedge degradation will gradually stop over the coming decades. The study suggests that these phenomena will cease between 2024 and 2096, depending on greenhouse gas concentration trajectories, with ice wedges experiencing some degradation by the end of the century.
PERMAFROST AND PERIGLACIAL PROCESSES
(2021)
Article
Geography, Physical
Julian B. Murton
Summary: The study identified permafrost regions in the Northern Hemisphere using geological criteria and distinguished characteristic periglacial landscapes from polygenetic periglacial landscapes. Characteristic periglacial landscapes are found in limited unglaciated permafrost regions, while polygenetic periglacial landscapes are more widespread in past and present permafrost regions.
PERMAFROST AND PERIGLACIAL PROCESSES
(2021)
Article
Geography, Physical
Anne Morgenstern, Pier Paul Overduin, Frank Gunther, Samuel Stettner, Justine Ramage, Lutz Schirrmeister, Mikhail N. Grigoriev, Guido Grosse
Summary: Through inventory and assessment of thermo-erosional valleys in ice-rich coastal lowlands adjacent to the Siberian Laptev Sea, it was found that thermo-erosional valleys are significant but often overlooked landforms of permafrost degradation, impacting biogeochemical cycling, sediment transport, and hydrology in the region.
PERMAFROST AND PERIGLACIAL PROCESSES
(2021)
Article
Geosciences, Multidisciplinary
F. Costard, L. Dupeyrat, A. Sejourne, F. Bouchard, A. Fedorov, B. Saint-Bezar
Summary: In the ice-rich permafrost of the Arctic regions, thermokarst erosion induces the formation of large-scale retrogressive thaw slumps (RTS) on slopes, which have significant geomorphological, hydrological, and biogeochemical impacts on the landscape. Research suggests that the melting of ground ice settings such as ice wedges and icy layers can lead to different impacts on frozen soil structure, with the melting of icy layers causing a loss of cohesion in the overlapping frozen soil structure.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Kethra Campbell-Heaton, Denis Lacelle, David Fisher
Summary: This study evaluates the impact of sampling depth and edge effects on the delta O-18 records of ice wedges, and compares them to the records of the nearby Agassiz Ice Cap, finding a higher degree of variability in the ice wedge records. The study highlights the importance of sampling location and data processing methods when using ice wedges as proxies.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Eleanor L. Jones, Andrew J. Hodson, Kelly R. Redeker, Hanne H. Christiansen, Steve F. Thornton, Jade Rogers
Summary: This study compares the dominant biogeochemical processes in high-centered and low-centered polygons in Arctic wetlands. It finds that the degradation of polygons leads to changes in the redox chemistry, including decreased iron and sulfate reduction and decreased preservation of their products.
PERMAFROST AND PERIGLACIAL PROCESSES
(2023)
Article
Geosciences, Multidisciplinary
L. Rouyet, O. Karjalainen, P. Niittynen, J. Aalto, M. Luoto, T. R. Lauknes, Y. Larsen, J. Hjort
Summary: This study investigates the spatial distribution of mean annual ground velocity in a mountainous landscape in Northern Norway using radar remote sensing and statistical modeling. Slope angle and mean annual air temperature are identified as the most important environmental factors affecting the distribution of horizontal and vertical velocity components. Vegetation and snow cover also play a role in indicating ground material and moisture conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Geosciences, Multidisciplinary
S. Wetterich, H. Meyer, M. Fritz, G. Mollenhauer, J. Rethemeyer, A. Kizyakov, L. Schirrmeister, T. Opel
Summary: Stable isotopes of wedge ice can help reconstruct past winter climate conditions. Records from Bol'shoy Lyakhovsky Island show that the LGM and MIS 3 had colder winter climates, while the moisture sources were similar during MIS 2.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Davi do Vale Lopes, Fabio Soares de Oliveira, Thiago Torres C. Pereira, Carlos Ernesto G. R. Schaefer
Summary: This study analyzed and described the periglacial landforms of President Head Peninsula in Maritime Antarctica, including the relationships between soils, landforms, and lithology. Seventeen types of landforms were identified and mapped, showing the complexity of geomorphic features due to various morphogenetic processes and lithological diversity. Three distinct geomorphological domains were identified, with the periglacial domain having rocky outcrops and permafrost-related landforms.
Article
Geography, Physical
M. T. Jorgenson, M. Z. Kanevskiy, J. C. Jorgenson, A. Liljedahl, Y. Shur, H. Epstein, K. Kent, C. G. Griffin, R. Daanen, M. Boldenow, K. Orndahl, C. Witharana, B. M. Jones
Summary: Ice-wedge degradation in the Arctic tundra is rapidly transforming the ecosystem, affecting microtopography, hydrology, soils, ground ice, and vegetation. The degradation has major implications for arctic land cover, tundra productivity, lake expansion and drainage, soil-carbon balance, trace-gas emissions, and wildlife populations.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geography, Physical
Dylan R. Harp, Vitaly Zlotnik, Charles J. Abolt, Bob Busey, Sofia T. Avendano, Brent D. Newman, Adam L. Atchley, Elchin Jafarov, Cathy J. Wilson, Katrina E. Bennett
Summary: The research provides a detailed analysis of drainage within ice-wedge polygons, verifying the model through calibration to field measurements and identifying necessary refinements. The results demonstrate the model's ability to accurately represent drainage dynamics, with sensitivity analysis indicating drainage primarily occurs in the annular region near the center of the polygon.
Article
Environmental Sciences
Chandi Witharana, Md Abul Ehsan Bhuiyan, Anna K. Liljedahl, Mikhail Kanevskiy, Torre Jorgenson, Benjamin M. Jones, Ronald Daanen, Howard E. Epstein, Claire G. Griffin, Kelcy Kent, Melissa K. Ward Jones
Summary: The research focuses on developing an object-based image analysis workflow to automatically extract ice-wedge polygon troughs from very high spatial resolution commercial satellite imagery. Through systematic experiments, the workflow demonstrates good interoperability and classification accuracy across different tundra vegetation units. Overall, the results suggest substantial interoperability of the workflow across the terrain, potentially influencing climate impacts and geological modeling in the Arctic region.
Article
Geography, Physical
Fumitoshi Imaizumi, Daniel Trappmann, Norikazu Matsuoka, Satoshi Tsuchiya, Okihiro Ohsaka, Markus Stoffel
Article
Geography, Physical
Tatsuya Watanabe, Norikazu Matsuoka, Hanne H. Christiansen, Stefanie Cable
PERMAFROST AND PERIGLACIAL PROCESSES
(2017)
Review
Geography, Physical
Hanne H. Christiansen, Norikazu Matsuoka, Tatsuya Watanabe
PERMAFROST AND PERIGLACIAL PROCESSES
(2016)
Article
Geography, Physical
Fumitoshi Imaizumi, Takaki Nishiguchi, Norikazu Matsuoka, Daniel Trappmann, Markus Stoffel
Article
Geography, Physical
Chizuru Yamagishi, Norikazu Matsuoka
EARTH SURFACE PROCESSES AND LANDFORMS
(2015)
Article
Geography, Physical
Norikazu Matsuoka, Hanne H. Christiansen, Tatsuya Watanabe
PERMAFROST AND PERIGLACIAL PROCESSES
(2018)
Article
Geography, Physical
Norikazu Matsuoka
Article
Geography, Physical
Fumitoshi Imaizumi, Daniel Trappmann, Norikazu Matsuoka, Juan Antonio Ballesteros Canovas, Koh Yasue, Markus Stoffel
Article
Multidisciplinary Sciences
Anyuan Li, Norikazu Matsuoka, Fujun Niu, Jing Chen, Zhenpeng Ge, Wensi Hu, Desheng Li, Bernard Hallet, Johan van de Koppel, Nigel Goldenfeld, Quan-Xing Liu
Summary: Patterned ground, characterized by segregation of stones in soil, is a prominent self-organized feature in polar and high-alpine landscapes. Despite its widespread presence, quantitative field data on the patterns and their slow dynamics have been lacking, hindering our understanding of pattern formation mechanisms. Through laboratory experiments, numerical simulations, theory, and experiments, it has been shown that stone transport is strongly influenced by local stone concentration and ice needle height, leading to pattern formation driven by needle ice activity, reminiscent of phase separation patterns in binary alloys. These results provide insights into landscape patterns and may help interpret spatial structures on diverse planetary landscapes, including Mars.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geography, Physical
Kanami Shinohara, Atsuya Ito, Takuro Ogura, Norikazu Matsuoka
Summary: This study evaluates the geological controls on marine cavernous landforms along the Pacific coastlines of Honshu Island, Japan. The shape and development of these landforms are strongly influenced by rock strength, structure, and other geological factors. Through field investigations and measurements, the landforms are classified into notches, caves, arches, and tunnels, with different geological controls identified for each type.
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI
(2023)
Article
Geography, Physical
Norikazu Matsuoka
Summary: The downslope movements of stones on a Japanese alpine debris slope were analyzed based on frost heave and soil temperature records. The study found that needle ice growth was the main cause of soil heaving, occurring 24-85 times per year. Stones moved downslope at rates correlating with their size, and needle ice was capable of transporting stones with a diameter of up to 30 cm. The study also observed a slight increase in annual mean air/soil temperatures and needle-ice activity over the monitoring period, possibly due to climate warming.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Review
Geography, Physical
Norikazu Matsuoka, Tetsuya Waragai, Sachi A. Wakasa
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI
(2017)
Article
Geography, Physical
Anyuan Li, Norikazu Matsuoka, Fujun Niu
EARTH SURFACE PROCESSES AND LANDFORMS
(2018)
Article
Geography, Physical
Masato Sato, Tsuyoshi Hattanji, Norikazu Matsuoka
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI
(2016)
Article
Geography, Physical
Norikazu Matsuoka
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI
(2016)