Article
Multidisciplinary Sciences
Jeffrey Munroe, Kristin Kimble, Christoph Spoetl, Gabriela Serrato Marks, David McGee, David Herron
Summary: Winter Wonderland Cave contains perennial ice associated with two types of cryogenic cave carbonate (CCC), with CCCfine having relatively high delta C-13 values and CCCcoarse displaying notably low delta O-18 values, indicating precipitation under (semi)closed-system conditions in a pool of residual water beneath an ice lid. Past research suggests that CCCcoarse forms during permafrost thaw, making it a valuable indicator of past cryospheric change. The geochronologic evidence indicates that CCC formation in this cave is a Late Holocene or contemporary process, and field observations suggest a recent change in the cave thermal regime allowing the ingress of liquid water, which is a first documented occurrence of CCCcoarse in the Western Hemisphere and a rare association of minerals with ice.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
Anika Donner, Paul Toechterle, Christoph Spoetl, Irka Hajdas, Xianglei Li, R. Lawrence Edwards, Gina E. Moseley
Summary: The investigation of cryogenic cave minerals (CCMs) has become a valuable tool for studying paleo-permafrost reconstruction. In this study, the northernmost-known deposit of fine-grained CCMs in Cove Cave, northeastern Greenland, was successfully investigated. The CCMs display a complex mineralogy and can be precisely dated using isochron-based Th-230/U dating and C-14 dating. The formation of these CCMs is related to melting events caused by anomalous weather conditions in 1889 CE.
CLIMATE OF THE PAST
(2023)
Article
Multidisciplinary Sciences
Jia Liu, Yuming Wu, Xing Gao
Summary: Global warming is leading to the retreat of glaciers, which in turn triggers increased landslide activity in high mountain areas. Studies have shown an increase in large landslides in the Himalayan region over the past decade, which is associated with a decline in glacier area.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
Gabriella Koltai, Christoph Spoetl, Alexander H. Jarosch, Hai Cheng
Summary: The study reveals that the early Younger Dryas period in the European Alps was only moderately cold, with a slight temperature drop and the formation of cryogenic cave carbonates (CCCs). It suggests that around 12.2 thousand years ago, there was likely a slight warming and drier autumns and early winters, leading to CCC formation.
CLIMATE OF THE PAST
(2021)
Article
Geography, Physical
Liang Liu, Hongjie Zhang, Wei Zhang, Le Chai
Summary: This study reconstructs the age and glacial activity of Mount Taibai during the Last Glacial Maximum (LGM). The results indicate a significant decrease in glacial coverage and equilibrium-line altitude (ELA) during the LGM, as well as a reduction in precipitation compared to the present. Temperature decrease is identified as the primary driver of glacial formation during the LGM on Mount Taibai.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geography, Physical
Gergana Georgieva, Christian Tzankov, Atanas Kisyov
Summary: This study presents the first detailed geophysical investigations of the Snezhnika microglacier, considered to be the southernmost microglacier in Europe, in the Pirin Mountains of Bulgaria. The study used GPR and ERT techniques to estimate the thickness of the microglacier and its subsurface structure, and found the presence of permafrost areas.
Article
Geography, Physical
Jinxin Cong, Guoping Wang, Dongxue Han, Chuanyu Gao
Summary: Peatlands store a large amount of soil carbon and are sensitive to climate change and fires. This study analyzed historical variations in organic matter (OM) sources in peatlands using sedimentary records, finding that fire intensity and management policies have significantly impacted OM sources in the past 150 years.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geography, Physical
A. Matthews, H. P. Affek, A. Ayalon, H. B. Vonhof, M. Bar-Matthews
Summary: This study examines the paleo-environmental evolution of the Eastern Mediterranean Sea region over the past 160 ka using Soreq Cave speleothems. Through independent temperature determinations, it was found that temperature rise precedes hydrological changes in the initial stages of Termination events.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Biology
Rafal Ogorek, Mateusz Speruda, Justyna Borzecka, Agata Piecuch, Magdalena Cal
Summary: Fungi in underground environments are usually in the form of spores suspended in the air, potentially hazardous to mammals. The research found that the fungal species in the air inside the cave do not pose a risk to healthy tourists, but the distribution of fungal species differs inside and outside the cave.
Article
Geography, Physical
Bert Kohlmann, Alfonsina Arriaga-Jimenez, Renato Portela Salomao
Summary: This study aimed to test the Elevational Rapoport Rule (ERR) for elevational gradients in Mexican mountains using dung beetle assemblages of the genus Onthophagus as a model organism. The results showed a positive correlation between altitude increase and assemblage altitudinal range, with different altitudinal relationships observed depending on the mountain. Additionally, factors such as altitudinal range, relative abundance, body size, and mountain's topographic prominence were found to influence the altitudinal distribution of Onthophagus dung beetles.
Article
Geology
Przemyslaw Sala, Pavel Bella
Summary: The interruption of speleothem crystallization by allogenic water invasion was studied in submerged speleothems and speleothem sections found in the Demanova Cave System. The interaction between speleothems and undersaturated water resulted in the presence of siliciclastic material and corrosion of calcite crystals. The duration and movement of water influenced the corrosion process, with a corrosion rate of up to 0.029 mm/y. U-series dating indicated that the interaction occurred during the Vistulian period, and identifying these corrosion episodes is crucial for understanding hiatuses.
ANNALES SOCIETATIS GEOLOGORUM POLONIAE
(2023)
Article
Environmental Sciences
Witold Pawel Alexandrowicz, Sylwia Skoczylas-Sniaz, Paulina Laskowska
Summary: The lithological and malacological studies of the low terrace sediments of the Rogoznik Stream in the Podhale Basin revealed a multi-layered structure and a diverse malacofauna. Radiocarbon dating allowed the determination of the sedimentary sequence's age, and a distinct change associated with the Medieval Climate Optimum was found, which was influenced by human activities.
GEOLOGY GEOPHYSICS AND ENVIRONMENT
(2023)