Article
Geography, Physical
Oyvind Flataker Lien, Berit O. Hjelstuen, Xu Zhang, Hans Petter Sejrup
Summary: High-latitude marine sediment archives provide information about ice sheets, paleoclimate, and glacial erosion and uplift, while the sediment packages along the NE Atlantic continental margin show significant spatial and temporal variations.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Karol Tylmann, Vincent R. Rinterknecht, Piotr P. Wozniak, Vallery Guillou
Summary: A new set of 10Be surface exposure ages of boulders located on the Pomeranian moraines and nearby erratic boulders in northern Poland was presented. By combining these ages with recalculated 10Be surface exposure ages along the Pomeranian ice-marginal belt, the researchers were able to determine the timing of the ice front standstill and retreat. The study provides insights into the geomorphological record of the Last Weichselian Pomeranian Phase in northern Poland.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
A. P. McCarron, G. R. Bigg, H. Brooks, M. J. Leng, J. D. Marshall, V Ponomareva, M. Portnyagin, P. J. Reimer, M. Rogerson
Summary: The study reveals the presence of substantial glacial ice on the Northeast Siberian coast during the late Quaternary, but the scale and timing of glaciation and de-glaciation remain controversial. Icebergs from Northeast Siberia were found to spread to subtropical waters during the last two glacial periods, with occasional times of enhanced ice flux from the Kamchatka-Koryak coast. In contrast, ice-rafted-debris was absent during much of the penultimate glacial period, suggesting different Northeast Siberian ice coverage between the last two glacial periods.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geography, Physical
Jacob Hardt, Ben Norden, Klaus Bauer, Ole Toelle, Jenny Krambach
Summary: The loading and unloading effects of the Scandinavian Ice Sheet triggered halotectonic movements, resulting in surface cracks in Northern Germany. High-resolution digital terrain data revealed over 160 surface cracks, most of which are located above Zechstein salt structures.These cracks, which can be several kilometers long and up to 20 meters deep, indicate widespread halokinetic movements in the region.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Geography, Physical
Li Wu, David J. Wilson, Rujian Wang, Sandra Passchier, Wout Krijgsman, Xun Yu, Tingyu Wen, Wenshen Xiao, Zhifei Liu
Summary: The study explored the dynamics of the Lambert Glacier-Amery Ice Shelf system over the past approximately 520 thousand years using high-resolution sedimentary records. It was found that the system's response was sensitive to oceanic forcing and local summer insolation, with potential additional modulation by subglacial bed topography. The records indicate that the system advanced more extensively during previous late Quaternary glacial periods than during Marine Isotope Stages 2 and 4, and retreated more significantly during Marine Isotope Stage 13.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Anders Romundset, Naki Akcar, Ola Fredin, Jane L. Andersen, Fredrik Hogaas, Marcus Christl, Serdar Yesilyurt, Christian Schluchter
Summary: This study describes the thinning and final decay of the Scandinavian Ice Sheet in the Gudbrandsdalen area in central southern Norway. The research was based on surface exposure dating, radiocarbon dating, and mapping of ice-dammed lakes. The results indicate that the ice sheet remained above 1800 m a.s.l. during the Younger Dryas and experienced rapid thinning during the Early Holocene. The final stage of deglaciation involved the formation of large ice-dammed lakes.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Johan Kleman, Martina Hattestrand, Ingmar Borgstrom, Derek Fabel, Frank Preusser
Summary: Studies have challenged previous assumptions of continuous ice cover in the core area of the Fennoscandian Ice Sheet during the Pleistocene, with evidence suggesting ice-free conditions in central Scandinavia from around 55 ka to about 35 ka.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Hugo Dube-Loubert, Martin Roy, Jean J. Veillette, Etienne Brouard, Joerg M. Schaefer, Hella Wittmann
Summary: The study systematically maps glacial landforms and ice-flow indicators in a large area of northeastern Quebec and Labrador, addressing uncertainties regarding ice divide evolution, landform systems, and ice retreat patterns. The application of cosmogenic dating provides new insights on the chronological framework and subglacial thermal regime, outlining four main landform assemblages and revealing a shift in deglaciation mode from warm-based to cold-based ice retreat. The research indicates that cold-based ice conditions were limited to highly elevated terrains, ruling out extensive cold-based ice cover over Ungava Bay during the last deglaciation.
Article
Geography, Physical
Shuzhuang Wu, Gerhard Kuhn, Helge W. Arz, Lester Lembke-Jene, Ralf Tiedemann, Frank Lamy, Bernhard Diekmann
Summary: This study investigates the sources and transport pathways of terrigenous sediments in the Drake Passage region over the past 140 thousand years. The Antarctic Circumpolar Current (ACC) is identified as the key driver for sediment dispersal in this area. Glacial mass accumulation rates, sea level changes, and ACC strength variations have all influenced terrigenous sediment supply and deposition in the Drake Passage region.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Geosciences, Multidisciplinary
C. M. Darvill, B. Menounos, B. M. Goehring, A. J. Lesnek
Summary: This study reports 20 Be-10 exposure ages from glacial erratics and bedrock on the west coast of British Columbia, Canada, contributing to the existing chronologies of Cordilleran Ice Sheet retreat along approximately 600 km of coastal North America. The data show that the western ice limit reached the present coast by 18-16 ka then slowed its retreat for around 4,000 years until 14-13 ka. The initial retreat is attributed to destabilization and grounding line retreat caused by rising sea level and/or ocean warming in the northern Pacific. Despite increasing temperatures, the subsequent stability of the ice sheet at the present coastal margin is likely due to the transition from marine to terrestrial margins.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Zhaoyan Gu, Junjie Zhang, Yanwu Lv, Haizhi Wang, Bing Xu, Xiaona Guo
Summary: The study systematically analyzed the Be-10 exposure ages of river terraces in the eastern Tarim Basin, reconstructing hydrological regime changes over the past 170,000 years, and found an inverse relationship between meltwater runoff and temperature changes.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Geosciences, Multidisciplinary
Alastair G. Dawson, Paul Bishop, James Hansom, Derek Fabel
Summary: New Be-10 exposure age dating and geomorphological mapping provide insights into the ice sheet deglaciation and late-glacial relative sea level change in the Inner Hebrides of Scotland. The study reveals the emergence of the oldest and highest shorelines shortly after ice sheet deglaciation, and the incursion of marine waters into coastal areas close to a fluctuating ice sheet margin. The research also highlights the formation of gravel beach ridges and marine terraces during the late-glacial period, suggesting changes in relative sea level.
EARTH AND ENVIRONMENTAL SCIENCE TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH
(2022)
Article
Geosciences, Multidisciplinary
Stefan Mulitza, Torsten Bickert, Helen C. Bostock, Cristiano M. Chiessi, Barbara Donner, Aline Govin, Naomi Harada, Enqing Huang, Heather Johnstone, Henning Kuhnert, Michael Langner, Frank Lamy, Lester Lembke-Jene, Lorraine Lisiecki, Jean Lynch-Stieglitz, Lars Max, Mahyar Mohtadi, Gesine Mollenhauer, Juan Muglia, Dirk Nuernberg, Andre Paul, Carsten Ruehlemann, Janne Repschlaeger, Rajeev Saraswat, Andreas Schmittner, Elisabeth L. Sikes, Robert F. Spielhagen, Ralf Tiedemann
Summary: This database presents a global atlas of downcore foraminiferal oxygen and carbon isotope ratios, providing valuable data for paleoceanographic analyses and teaching marine stratigraphy. It includes a large number of stable isotope records and radiocarbon ages from sediment cores.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Multidisciplinary Sciences
Yucheng Wang, Mikkel Winther Pedersen, Inger Greve Alsos, Bianca De Sanctis, Fernando Racimo, Ana Prohaska, Eric Coissac, Hannah Lois Owens, Marie Kristine Foreid Merkel, Antonio Fernandez-Guerra, Alexandra Rouillard, Youri Lammers, Adriana Alberti, France Denoeud, Daniel Money, Anthony H. Ruter, Hugh McColl, Nicolaj Krog Larsen, Anna A. Cherezova, Mary E. Edwards, Grigory B. Fedorov, James Haile, Ludovic Orlando, Lasse Vinner, Thorfinn Sand Korneliussen, David W. Beilman, Anders A. Bjork, Jialu Cao, Christoph Dockter, Julie Esdale, Galina Gusarova, Kristian K. Kjeldsen, Jan Mangerud, Jeffrey T. Rasic, Birgitte Skadhauge, John Inge Svendsen, Alexei Tikhonov, Patrick Wincker, Yingchun Xing, Yubin Zhang, Duane G. Froese, Carsten Rahbek, David Bravo Nogues, Philip B. Holden, Neil R. Edwards, Richard Durbin, David J. Meltzer, Kurt H. Kjaer, Per Moller, Eske Willerslev
Summary: A large-scale metagenomic analysis of plant and mammal environmental DNA in the circumpolar region over the past 50,000 years shows complex ecological changes, including the extinction of large mammals postglacially and the emergence of modern ecosystems. The study provides insights into the long-term dynamics of Arctic biota at both circumpolar and regional scales, highlighting the power of ancient environmental metagenomics analyses in understanding population histories and long-term ecological dynamics.
Article
Geography, Physical
Shuangwen Yi, Xiaoyong Wang, Zhiwei Xu, Jiang Wu, Huayu Lu
Summary: The changes in paleoclimate and their driving mechanisms in northwestern China since the Late Quaternary were studied using a sedimentary record from Yitang Lake in the Dunhuang Basin. The study revealed a significant sedimentary hiatus between approximately 100 ka and 23 ka, likely due to the dry and harsh environmental conditions during the Last Glacial period. The hydrological variations in the area since the Late Quaternary were mainly controlled by changes in precipitation and glacier meltwater from the northeastern Tibetan Plateau, regulated by shifts in atmospheric circulation patterns and the interplay between the westerlies and the East Asian summer monsoon at different scales.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geography, Physical
Melody Biette, Vincent Jomelli, Marie Chenet, Regis Braucher, Laurie Menviel, Didier Swingedouw, Vincent Rinterknecht
Summary: This study presents Be-10 cosmic-ray exposure ages of mountain glacier moraines in southeastern and southern Greenland, documenting glacier fluctuations during the Late Holocene for the first time in these areas. The research reveals multiple glacier advances during the Late Holocene, with common timing of the largest glacier expansion. The study suggests the significant glacial advance at around 3 ka in southern and southeastern Greenland could be attributed to a combination of stronger East Greenland Current, weaker Irminger Current, and increased sea-ice concentration during the Late Holocene.
Article
Geosciences, Multidisciplinary
Colin Chanteloube, Laurie Barrier, Reza Derakhshani, Cyril Gadal, Regis Braucher, Vincent Payet, Laetitia Leanni, Clement Narteau
Summary: This study analyzes the major landforms of the Lut Desert in Iran to provide a comprehensive understanding of aeolian systems over different time scales. The findings show comparable sediment discharges from long-term erosion and deposition as well as short-term and medium-term sand discharges derived from wind data and dune morphodynamics. This study quantifies the geomorphic controls of aeolian processes and provides insight into mass exchanges between continents and the atmosphere.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Cheikh Ahmadou Bamba Niang, David Baratoux, Pierre Rochette, Regis Braucher, Wolf Uwe Reimold, Philippe Lambert, Dinna Pathe Diallo, Vincent Regard, Sebastien Carretier, Mark W. Jessell, Gayane Faye, Christian Koeberl
Summary: The Bosumtwi impact structure in Ghana is a remarkable and valuable natural laboratory to study erosion and weathering processes. The study reveals the impacts of these processes on the structure's morphology and provides insights into the factors controlling erosion rates. The circular potassium anomalies observed in radiometric surveys in tropical regions could potentially indicate the presence of impact structures.
METEORITICS & PLANETARY SCIENCE
(2022)
Article
Biology
R. Braucher, R. Oslisly, I Mesfin, P. P. Ntoutoume
Summary: Elarmekora, a historical site near Lope National Park in Gabon, is considered a key site for Atlantic Central Africa. Preliminary dating based on lithic assemblage and geomorphological criteria suggests an age of 400,000 years. Through field trips and measurements of cosmogenic nuclides, the minimum age of the cobble artefacts is estimated to be 730-620,000 years. This finding proves the early presence of hominins in western Central Africa.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Geography, Physical
Joanna Charton, Irene Schimmelpfennig, Vincent Jomelli, Guillaume Delpech, Pierre-Henri Blard, Regis Braucher, Deborah Verfaillie, Vincent Favier, Vincent Rinterknecht, Hugues Goosse, Xavier Crosta, Leo Chassiot, Leo Martin, Damien Guillaume, Claude Legentil
Summary: Cosmogenic nuclide dating was used to study glacier fluctuations on the Kerguelen Archipelago in the sub-Antarctic sector of the Indian Ocean. The dating results reveal multiple advances and retreats of glaciers during the late glacial and late Holocene periods, with influences from the Antarctic Cold Reversal events. Glaciers likely experienced significant recession during the Early and Mid-Holocene, and re-advanced only during the Late Holocene. Comparison with other southern mid-latitude regions identifies different glacier evolution patterns. The variations of Kerguelen glaciers may be controlled by sea surface temperature and long-term fluctuations of the Southern Annular Mode.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Arthur Ancrenaz, Regis Braucher, Emmanuelle Defive, Alexandre Poiraud, Johannes Steiger
Summary: This study reconstructs the chronology of late Pleistocene glacial fluctuations in the Aubrac Mountains using exposure ages and regional paleoenvironmental proxies. The results show glacier extremes and stades occurring during early and late Marine Isotopic Stage 2, with deglaciation during Heinrich Stadial 1. The study also highlights the significance of Western European atmospheric circulation changes in controlling glacier growth in the region.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
V Jomelli, D. Swingedouw, M. Vuille, V Favier, B. Goehring, J. Shakun, R. Braucher, I Schimmelpfennig, L. Menviel, A. Rabatel, L. C. P. Martin, P-H Blard, T. Condom, M. Lupker, M. Christl, Z. He, D. Verfaillie, A. Gorin, G. Aumaitre, D. L. Bourles, K. Keddadouche
Summary: Based on cosmic-ray exposure chronologies, the study reveals that glaciers in the tropical Andes and the north Atlantic regions showed variations on millennial timescales during the Holocene, distinct from other regions. Transient climate simulations and a semi-empirical model also suggest that the Atlantic Meridional Ocean Overturning Circulation (AMOC) plays a significant role in driving glacier changes in these regions. The findings highlight the importance of understanding past AMOC behavior as a potential driver of glacier variations.
NATURE COMMUNICATIONS
(2022)
Article
Geography, Physical
Mirela Vasile, Alfred Vespremeanu-Stroe, Daniela Pascal, Regis Braucher, Alin Plesoianu, Razvan Popescu, Bernd Etzelmueller, A. S. T. E. R. ASTER Team, Georges Aumaitre, Karim Keddadouche, Fawzi Zaidi
Summary: Rock walls in high mountain areas are the result of long-term slopes response to tectonics, weathering, and denudation. This study focuses on the distribution and morphometry of rock walls in the Romanian Carpathians and reveals the significant influence of structural control on their distribution. Metamorphic and igneous rock walls are found in the highest sectors of the mountain slopes, most likely shaped during Early Holocene by rock slope failure events and permafrost degradation.
Article
Geography, Physical
Sergey Arzhannikov, Anastasia Arzhannikova, Regis Braucher, Goro Komatsu
Summary: A combined geomorphological and geochronological investigation was conducted to determine the cause of Darhad paleolake formation and date the Darhad megaflood. New data obtained through analysis of satellite image mapping revealed the presence of glacial dams along the Shishkhid Gol valley. It is hypothesized that large glaciers downstream of the Tengis Gol mouth were the main contributors to the highest Shishkhid Gol backwater. The estimated height of the glacial dam was approximately 300 m. The presence of paleolake shorelines at an altitude of 1713 m near the glacial dam confirms its significant role in the formation of the Darhad paleolake.
QUATERNARY INTERNATIONAL
(2023)
Article
Geography, Physical
Michal Sujan, Regis Braucher, Andrej Chyba, Martin Vlaciky, Kishan Aherwar, Barbara Rozsova, Klement Fordinal, Juraj Maglay, Alexander Nagy, Martina Moravcova, Aster Team
Summary: This study examines the suitability of the authigenic Be-10/Be-9 dating method for dating the deposits of an incising river, using the example of the Nova Vieska river terrace. The results show that the ages of the deposits range from approximately 4.13 to 1.39 million years ago. These findings highlight the impact of redeposition on the application of the authigenic Be-10/Be-9 dating method in incising rivers.
JOURNAL OF QUATERNARY SCIENCE
(2023)
Article
Engineering, Geological
Jan Lenart, Martin Kasing, Tomas Panek, Regis Braucher, Frantisek Kuda
Summary: This research investigates the slow-moving rockslide phenomenon in the Thaya River canyon, Central Europe. By combining geomorphological research with geological structure analysis and terrestrial cosmogenic nuclide dating, it is found that the rockslide developed gradually over time and left long-lasting topographic features.
Article
Geography, Physical
Vincent Jomelli, Patrick Wagnon, Didier Swingedouw, Joanna Charton, Regis Braucher, Adele Hue, Fanny Brun, Christophe Colin, Stephanie Gairoard, Dibas Shrestha
Summary: The current research on the Mera and South Khare glaciers in Nepal indicates that Asian monsoon precipitation plays a dominant role in the interannual mass balance variability, while temperature affects the altitude of the snow-rain threshold. The study also suggests that the long-term evolution of the glaciers does not perfectly align with changes in Indian monsoon precipitation and temperature as simulated by climate models, indicating the need for further research and improved simulations to better understand glacier and climate dynamics.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Michal Sujan, Kishan Aherwar, Rastislav Vojtko, Regis Braucher, Katarina Sarinova, Andrej Chyba, Jozef Hok, Anita Grizelj, Radovan Pipik, Bronislava Lalinska-Volekova, Barbara Rozsova, Aster Team
Summary: This study employs the authigenic Be-10/Be-9 dating method to construct an age model of Lake Turiec in the intermontane Turiec Basin. The analysis of sedimentological facies associations and magnetostratigraphy suggests an increase in sediment supply to accommodation rate ratio due to the replacement of the open lake environment. The dating results indicate an age range of 10.7-7.8 Ma for the lacustrine succession and 6.7 Ma for the fan delta succession.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geography, Physical
Tereza Dlabackova, Zbynek Engel, Tomas Uxa, Regis Braucher, Aster Team
Summary: This study used the 10Be exposure dating method to obtain reliable exposure ages for eight rock glaciers, showing that they stabilized from 16.5 to 11 thousand years ago. The timing of rock glacier stabilization is consistent with other mountain regions in Europe but extends the age previously determined for rock glaciers in the Tatra Mts. There are differences in the elevation and timing of stabilization between north- and south-facing valleys, which may be caused by differences in solar radiation and glacier retreat.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Arthur Ancrenaz, Stephane Pochat, Emmanuelle Defive, Alexandre Poiraud, Regis Braucher, Vincent Rinterknecht, Johannes Steiger
Summary: The aim of this study was to build a new chronology of Late Pleistocene glacial fluctuations in the Cantal Mountains and Cézallier Plateau. The research utilized the study of glacial landform-sediment assemblages and new exposure ages to identify four glacial stadials. The results enhance the chronostratigraphy of the western Massif Central and demonstrate the area's sensitivity to atmospheric circulation changes.
