@article{MTMT:35283023, title = {Effects of Wildfires on Soil Organic Carbon in Boreal Permafrost Regions: A Review}, url = {https://m2.mtmt.hu/api/publication/35283023}, author = {Li, Xiaoying and Sun, Long and Han, Yilun}, doi = {10.1002/ppp.2247}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, unique-id = {35283023}, issn = {1045-6740}, keywords = {boreal forest; thermokarst; Permafrost; soil organic carbon; wildfire; Fire Severity}, year = {2024}, eissn = {1099-1530} } @article{MTMT:35165519, title = {Uncrewed Aerial Vehicle–Based Assessments of Peatland Permafrost Vulnerability Along the Labrador Sea Coastline, Northern Canada}, url = {https://m2.mtmt.hu/api/publication/35165519}, author = {Beer, Jordan and Wang, Yifeng and Way, Robert and Forget, Anika and Colyn, Victoria}, doi = {10.1002/ppp.2242}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {1}, unique-id = {35165519}, issn = {1045-6740}, abstract = {Palsas and peat plateaus in subarctic peatlands are some of the southernmost lowland permafrost landforms in the Northern Hemisphere. Peatland permafrost along the Labrador Sea coastline in northeastern Canada is substantially understudied despite the importance of these landforms for wildlife, carbon stores, and Indigenous land users. In this study, we derived geomorphological and resiliency indices for peatland permafrost landforms at 20 wetland complexes, spanning a latitudinal gradient from Blanc‐Sablon, QC (51.4° N), to Nain, NL (56.5° N). Orthomosaics and three‐dimensional point clouds were created for each site using UAV‐based surveys and structure‐from‐motion photogrammetry. Analyses revealed that landforms in the region are characterized by short heights (maximum height: 3.65 m, average height: 0.49 m) with lichen and dwarf shrub cover, making them more similar to features in northern Europe than western Canada. Palsas and peat plateaus ranged in size from 49 to 14,233 m 2 , with a median feature size of 259 m 2 . Peatland permafrost in the region exhibits high levels of fragmentation, with most study sites (90%) exhibiting low or very low thaw resiliency. The results from this study indicate a high vulnerability to thaw and degradational processes, with potential negative consequences for species of cultural value to Labrador Inuit, Kallunângajuit, and Innu.}, year = {2024}, eissn = {1099-1530}, pages = {1}, orcid-numbers = {Beer, Jordan/0000-0002-4577-462X} } @article{MTMT:35075606, title = {Optically-Stimulated-Luminescence Ages and Paleo-Environmental Implications of Relict Frost Wedges in North–Central Bohemia, Czech Republic}, url = {https://m2.mtmt.hu/api/publication/35075606}, author = {Uxa, T. and Křížek, M. and Krause, D. and Moska, P. and Murton, J.}, doi = {10.1002/ppp.2241}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {2024}, unique-id = {35075606}, issn = {1045-6740}, abstract = {Relict frost wedges are widespread and valuable indicators of past environmental conditions that have been extensively dated across central and western European lowlands over the past few decades, but their timing in the Czech Republic is poorly known. Here, we present optically‐stimulated‐luminescence (OSL) ages for seven relict frost wedges situated at four study sites in north–central Bohemia, Czech Republic (49.9992–50.4956°N, 13.3736–16.0011°E, 230–350 m above sea level). The OSL ages indicate that the frost wedges developed during two phases in marine isotope stage 2: an older phase that peaked at 23.6 ± 2.9 ka and a younger phase that peaked at 16.1 ± 1.3 ka. Both phases probably experienced cold, dry and windy conditions that were mostly associated with <0°C mean annual air and ground temperatures and the presence of at least discontinuous permafrost, which is in line with similar central and western European records and other paleo‐environmental archives. The new OSL ages constitute the first extended dataset on the timing of frost wedges in this undersampled area between the Fennoscandian and Alpine ice sheets, which is essential for reconstructing past permafrost extents and climate conditions, as well as for validating models of past permafrost dynamics in central Europe.}, year = {2024}, eissn = {1099-1530}, pages = {1} } @article{MTMT:34986255, title = {Sulfur Isotope Geochemistry of Ice-Wedges in Yakutia, East Siberia}, url = {https://m2.mtmt.hu/api/publication/34986255}, author = {Jeong, Hyeonjeong and Moon, Jonghan and Iwahana, Go and Fedorov, Alexander N. and Ahn, Jinho and Sim, Min Sub}, doi = {10.1002/ppp.2233}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, unique-id = {34986255}, issn = {1045-6740}, keywords = {particulate organic matter; East Siberia; Sulfur isotope; sulfate aerosol; ice-wedge}, year = {2024}, eissn = {1099-1530}, orcid-numbers = {Iwahana, Go/0000-0003-4628-1074} } @article{MTMT:35004364, title = {Spatiotemporal characteristics and variability in the thermal state of permafrost on the Qinghai-Tibet Plateau}, url = {https://m2.mtmt.hu/api/publication/35004364}, author = {Hu, Guojie and Zhao, Lin and Sun, Zhe and Zou, Defu and Xiao, Yao and Liu, Guangyue and Du, Erji and Wang, Chong and Wang, Yuanwei and Wu, Xiaodong and Wang, Lingxiao and Zhao, Yonghua}, doi = {10.1002/ppp.2219}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {35}, unique-id = {35004364}, issn = {1045-6740}, keywords = {Permafrost; active layer thickness; Qinghai-Tibet Plateau; ground temperature; permafrost degradation}, year = {2024}, eissn = {1099-1530}, pages = {143-156}, orcid-numbers = {Hu, Guojie/0000-0002-5428-0445; Zhao, Lin/0000-0003-0245-8413; Liu, Guangyue/0000-0002-7590-0412; Wang, Yuanwei/0000-0001-7394-799X} } @article{MTMT:33879148, title = {Sensitivity of simulated frozen ground temperatures to different solar radiation and air temperature products-a case study in the Qilian Mountains in West China}, url = {https://m2.mtmt.hu/api/publication/33879148}, author = {Zhang, Yanlin and Li, Xin and Chang, Xiaoli and Jin, Huijun and Huang, Anning and Liang, Ji and Cheng, Guodong and Wang, Xin}, doi = {10.1002/ppp.2187}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {34}, unique-id = {33879148}, issn = {1045-6740}, abstract = {Downward solar radiation (DSR) and air temperature (Ta) have significant influences on the thermal state of frozen ground. These parameters are also important forcing terms for physically based land surface models (LSMs). However, the quantitative influences of inaccuracies in DSR and Ta products on simulated frozen ground temperatures remain unclear. In this study, three DSR products (CMFD-SR, Tang-SR, and GLDAS-SR) and two Ta products (CMFD-Ta and GLDAS-Ta) were used to force an LSM model in an alpine watershed in Northwest China, to investigate the sensitivity of simulated ground temperatures to different DSR and Ta products. Compared to a control model (CTRL) forced by in situ observed DSR, ground temperatures simulated by the experimental model forced by GLDAS-SR are obviously decreased because GLDAS-SR is much lower than in situ observations. Instead, simulation results in models forced by CMFD-SR and Tang-SR are much closer to those of CTRL. Ta products led to significant errors in simulated ground temperatures. In conclusion, both CMFD-SR and Tang-SR could be used as good alternatives to in situ observed DSR for forcing a model, with acceptable errors in simulation results. However, more care need to be paid for models forced by Ta products instead of Ta observations, and conclusions should be carefully drawn.}, keywords = {solar radiation; frozen ground; Land surface model; ground temperature; meteorological forcing}, year = {2023}, eissn = {1099-1530}, pages = {513-529} } @article{MTMT:34293684, title = {Climate change records in coversand deposits from the eastern margin of the Tarnow Plateau (southeast Poland)}, url = {https://m2.mtmt.hu/api/publication/34293684}, author = {Sokolowski, Tadeusz and Woronko, Barbara and Chmielowska-Michalak, Dorota}, doi = {10.1002/ppp.2199}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {34}, unique-id = {34293684}, issn = {1045-6740}, abstract = {Coversands (CSs) are one of the most distinctive sediments within the European Sand Belt. Their extraordinary thickness, exceeding 6 m, was recorded at the Gora Motyczna site located at the edge of the Wisloka River valley in the Tarnow Plateau (southeast Poland). The sedimentary record of the studied CSs sets their arrangement into one of two sedimentary cycles. Each consists of sandy (A1 and A2) and silty (B1 and B2) lithofacies, forming an A1 double right arrow B1 double right arrow A2 double right arrow B2 sequence that is considered to be a record of climate change during the Weichselian Late Pleniglacial. Sandy lithofacies accumulation occurred under dry and snow-free climatic conditions, whereas silty lithofacies accumulation marks an increase in humidity as a result of the presence of snow-cover. Sediment optical dating indicated that the studied CSs were deposited in a period from similar to 18-17 to similar to 16-15 ka. The period of accumulation was therefore short, which is confirmed by the analysis of quartz-grain shape and surface type. Due to this brevity of aeolian processes during this period, the only change expressed is in grain-surface microrelief; thus, the quartz grains had already inherited their shape and degree of rounding from their source environments and earlier processes. The source sediments could have been artefacts of Miocene and Quaternary deflationary sediments associated with blowouts.}, keywords = {climate change; periglacial environment; Weichselian; aeolian coversand; rounding and frosting of quartz sand grans}, year = {2023}, eissn = {1099-1530}, pages = {428-447}, orcid-numbers = {Woronko, Barbara/0000-0002-2763-5650} } @article{MTMT:33777210, title = {Characterization and mapping of MIS‐2 thermal contraction crack polygons in Western Transdanubia, Hungary}, url = {https://m2.mtmt.hu/api/publication/33777210}, author = {Farkas, Beáta and Sipos, György and Bartyik, Tamás and Józsa, Edina and Czigány, Szabolcs and Balogh, Richárd and Varga, Gábor and Kovács, János and Fábián, Szabolcs Ákos}, doi = {10.1002/ppp.2190}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {34}, unique-id = {33777210}, issn = {1045-6740}, year = {2023}, eissn = {1099-1530}, pages = {417-427}, orcid-numbers = {Farkas, Beáta/0000-0002-7026-8980; Sipos, György/0000-0001-6224-2361; Bartyik, Tamás/0000-0003-1608-4889; Czigány, Szabolcs/0000-0002-9158-3162; Kovács, János/0000-0001-7742-5515; Fábián, Szabolcs Ákos/0000-0001-9127-2113} } @article{MTMT:33956951, title = {Yedoma sediments with gravel and rock debris inclusions: Characteristics and origin}, url = {https://m2.mtmt.hu/api/publication/33956951}, author = {Vasil'chuk, Yurij K.}, doi = {10.1002/ppp.2185}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {34}, unique-id = {33956951}, issn = {1045-6740}, abstract = {Yedoma ice complex sediments with large syngenetic ice wedges (IW) are usually observed in outcrops in river valleys on permafrost plains and on sea coasts and lake shores in the north of Siberia, Alaska, and Canada. Less frequently, they occur in mountainous and foothill regions of East Siberia, for example, in the Upper Kolyma Upland and in river valleys of the Eastern Sayan Range and the Anabar Plateau, as well as in Alaska and Yukon. The author's materials on gravelly Yedoma with IWs in the intermountain basins, on mountain slopes, and on sea coasts and lake shores are presented. The obtained data allow a conclusion that gravelly Yedoma has mainly alluvial, lacustrine, and colluvial origins with an insignificant participation of aeolian processes. Occurrence of the late Pleistocene gravelly deposits with large syngenetic IWs confirms a hypothesis of polygenetic origin of Yedoma.}, keywords = {Alaska; Gravel; Siberia; Yukon; non-aeolian genesis; syngenetic ice wedges; Yedoma}, year = {2023}, eissn = {1099-1530}, pages = {229-243} } @article{MTMT:33806674, title = {Last Glacial Maximum cryogenic calcite deposits in an alluvial fan at Villetoureix, southwest France}, url = {https://m2.mtmt.hu/api/publication/33806674}, author = {Bertran, P and Couchoud, I and Charlier, K and Hatté, C and Lefrais, Y and Limondin‐Lozouet, N and Queffelec, A}, doi = {10.1002/ppp.2183}, journal-iso = {PERMAFROST PERIGLAC}, journal = {PERMAFROST AND PERIGLACIAL PROCESSES}, volume = {34}, unique-id = {33806674}, issn = {1045-6740}, year = {2023}, eissn = {1099-1530}, pages = {244-258}, orcid-numbers = {Bertran, P/0000-0003-3334-9869; Couchoud, I/0000-0002-7166-9575} }