Article
Geochemistry & Geophysics
Clare Wilkinson, Timothy Stahl, Katie Jones, Toshiyuki Fujioka, David Fink, Kevin P. Norton
Summary: Large earthquakes have a significant impact on the topographic evolution of active mountain ranges. In this study, the researchers analyzed in-situ Be-10 concentrations in fluvial sediments to understand the post-earthquake denudation rates of the Conway River catchment in New Zealand. The results showed higher erosion rates at the rangefront compared to the river outlet, and the overall erosion rates were consistent with previous studies.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Soil Science
Joanna Beata Kowalska, Markus Egli, Martina Vogtli, Dmitry Tikhomirov, Beata Labaz, Marcus Christl, Jaroslaw Waroszewski
Summary: Loess deposits are important archives for studying deposition and erosion events. Long-term erosion rates are crucial for understanding loess stability and soil evolution. This study used meteoric Be-10 to analyze its distribution, determine erosion rates, and assess soil thickness and stability over time.
Article
Geochemistry & Geophysics
Yanyan Wang, Sean D. Willett, Datian Wu, Negar Haghipour, Marcus Christl
Summary: The eastern escarpment of Madagascar shows varying erosion rates across different regions, with slower rates on the high plateau and coastal plain, and faster rates in the escarpment basins, particularly in the Alaotra-Ankay Graben basins. The spatial pattern indicates a retreating escarpment landscape, with retreat rates consistent with a model of steady retreat since the time of rifting.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Instruments & Instrumentation
Alexandru T. Codilean, Reka-H Fulop, Klaus M. Wilcken, Dafne S. Koutamanis, David Fink, L. Keith Fifield, Henri Wong, T. Gabriel Enge, Chris Vardanega, Brett Rowling
Summary: The University of Wollongong's sample preparation laboratory has been operating since 2017. It serves as a feeder laboratory to ANSTO's Centre for Accelerator Science and focuses on optimizing sample throughput and target purity. The laboratory has prepared a small number of samples for measurement at the Australian National University. The Be-10/Be-9 ratios have fluctuated over time, while the Al-26/Al-27 ratios have shown continuous improvement.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Environmental Sciences
Lionel L. Siame, Lucas Espindola Rosa, Luis Felipe Soares Cherem, Jose Guilherme de Oliveira, Olivier Evrard, Houda Barhoumi, Laetitia Leanni, Adrien Duvivier, Pierre-Henri Blard, Didier L. Bourles, A. S. T. E. R. Team ASTER Team, Sophie Cornu
Summary: Land degradation from continental surface erosion is a global issue caused by unsustainable human activities. The intertropical zone, which is already fragile, will likely be further impacted by climate change, leading to increased aridity and exacerbating soil erosion and land degradation. It is crucial to understand the factors that control the critical zone, including its responses to climate and land use changes, in order to achieve sustainability. The Brazilian Cerrado biome provides an ideal natural laboratory for studying the consequences of intense agricultural activities on continental surface erosion, and our findings indicate that human-induced erosion rates greatly exceed sustainable levels.
Article
Instruments & Instrumentation
Yusuke Yokoyama, Atsunori Nakamura, Gen Nagano, Hideki Maemoku, Yosuke Miyairi, Stephen Obrochta, Hiroyuki Matsuzaki
Summary: In this study, the age of marine terraces along the southern coasts of Shikoku Island and the Kii Peninsula was determined using in-situ terrestrial cosmogenic radionuclides (TCN), 10Be and 26Al, to reconstruct the uplift history of the southwestern coast of Japan. The agreement between the TCN chronology and existing tephrochronology suggests the applicability of this method in mid-latitude coastal areas where erosion is a factor. Measuring TCN on uplifted terraces around Japan can be a promising technique for clarifying uplift rates and the seismic history of the region.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Geography, Physical
Hua Tu, Lan Luo, Chenglong Deng, Zilong Ou, Zhongping Lai, Guanjun Shen, Christopher J. Bae, Darryl Granger
Summary: The Nihewan Basin in northern China is a significant site for the study of biochronostratigraphy and early human evolution in East Asia. The study used radioisotopic dating to verify the ages of the Xiashagou Fauna, revealing consistency with previous estimates.
QUATERNARY SCIENCE REVIEWS
(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
Geosciences, Multidisciplinary
Christopher T. Halsted, Paul R. Bierman, Greg Balco
Summary: The study assesses the variations in the in situ cosmogenic Al-26/Be-10 production ratio expected from nuclear physics, finding a negative correlation between the Al-26/Be-10 production ratio and elevation, as well as an increase in the production ratio with increasing latitude. The findings suggest that using production rate scaling can help minimize biases in two-isotope studies.
Article
Geography, Physical
Reza Sohbati, Kristina Hippe
Summary: Quantifying past changes in erosion rate is crucial for understanding earth surface processes. This study proposes a theoretical framework to overcome the limitations of previous methods by combining OSL dating with C-14-Be-10 chronometer, which allows for determining both the magnitude and timing of erosion rate changes.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Geosciences, Multidisciplinary
Gerald Raab, Wasja Dollenmeier, Dmitry Tikhomirov, Goncalo Vieira, Piotr Migon, Michael E. Ketterer, Marcus Christl, Jamey Stutz, Markus Egli
Summary: There is limited data available on comparing soil erosion rates between surfaces of different ages due to short-term processes frequently masking the longer-term erosion signal. This study used isotopes and the principles of percolation theory to investigate the soil dynamics in two areas of different ages at Serra da Estrela, Portugal. The results showed temporal differences in soil mixing processes and revealed that the formerly glaciated area had lower weathering and carbon content compared to the non-glaciated area.
Article
Environmental Sciences
Apolline Mariotti, Jacky Croke, Rebecca Bartley, Samuel E. Kelley, Jay Ward, Reka-Hajnalka Fulop, Anna H. Rood, Dylan H. Rood, Alexandru T. Codilean, Klaus Wilcken, Keith Fifield
Summary: This study utilized cosmogenic 10Be data to investigate sediment delivery to the Great Barrier Reef, presenting background sediment yields for 11 catchments and calculating an Accelerated Erosion Factor to identify denudation hotspots. The results showed that 58% of basins have higher modern sediment yields compared to long-term values, indicating potential changes in sediment delivery dynamics.
MARINE POLLUTION BULLETIN
(2021)
Article
Instruments & Instrumentation
Fumiko Watanabe Nara, Takahiro Watanabe, Yoko Saito-Kokubu, Liping Zhu
Summary: In this study, the 10Be/9Be ratios of quartzose arenite rock samples obtained from Lake Pumoyum Co in the southern Tibetan Plateau were measured to calculate the minimum 10Be exposure ages and maximum erosion rates. The results showed that as the altitude decreased, the 10Be exposure ages became older, indicating possible factors such as tectonic activity, regional alpine glacier retreat, or downward migration of rocks.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Geochemistry & Geophysics
Saptarshi Dey, Bodo Bookhagen, Rasmus C. Thiede, Hella Wittmann, Naveen Chauhan, Vikrant Jain, Manfred R. Strecker
Summary: The study reveals significant variations in erosion rates on the southern flanks of the Dhauladhar Range in the western Himalaya under different climatic forcings. During periods of strong monsoon intensity, both moderately steep and high slope areas experience higher erosion rates, while during weak monsoon periods, the erosion rates are lower. Additionally, lithology also influences erosion.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Benedikt Ritter, Joel Mohren, Steven A. Binnie, Volker Wennrich, Istvan Dunkl, Richard Albert, Axel Gerdes, Sandro LoBue, Tibor J. Dunai
Summary: The Atacama Desert is a very dry and old desert with extremely low precipitation rates. Surface processes operate at very slow rates over long periods of time. Terrestrial cosmogenic nuclide derived erosion rate estimates can be used to understand the rate of surface processes and age of landscapes in desert environments. In the hyperarid core of the Atacama Desert, basin-averaged bedrock erosion rates from channel sediments are extremely low, indicating slow or almost absent fluvial processes. However, erosion rates of channel knickpoints reveal higher rates. These low erosion rates are explained by the rare severe precipitation events that cause erosion in the desert, modulated by local intrinsic processes and conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)