Article
Environmental Sciences
Pengcong Wang, Junhui Xue, Zongmin Zhu
Summary: This study investigated the impact of particle sizes in urban sediments on the bioaccessibility of heavy metals in the human digestive system. It was found that clay minerals and Fe/Mn oxides in fine particles play a crucial role in absorbing and fixing heavy metals in the intestinal tract. Additionally, magnetic minerals formed during the digestion process may affect the bioaccessibility of metals in the gastrointestinal tract.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geography, Physical
Jehangeer A. Mir, Reyaz A. Dar, Mathias Vinnepand, Christian Laag, Christian Rolf, Christian Zeeden
Summary: Loess Paleosol Sequences (LPS) are important archives of climatic and environmental change, and provide insights into the interface of climate subsystems. However, LPS in certain regions have been less studied, and low sampling resolution limits the assessment of their full potential. This study investigates the Wanihama LPS in Kashmir, and demonstrates the potential of using high-resolution data to validate the stratigraphy and establish a correlative framework for LPS studies in the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geography, Physical
Jehangeer A. Mir, Reyaz A. Dar, Mathias Vinnepand, Christian Laag, Christian Rolf, Christian Zeeden
Summary: Loess Paleosol Sequences (LPS) serve as valuable archives of climatic and environmental change, with high-resolution studies mainly conducted in Europe, East Asia, and North America. This study focuses on the potential of the Wanihama LPS in Kashmir to reflect climatic and paleoenvironmental variability, demonstrating the need for high-resolution proxy data to validate and establish a correlative framework for LPS across the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Anish Kumar Warrier, Badanal Siddaiah Mahesh, Rahul Mohan, Rajasekhariah Shankar
Summary: The study of lake-bed sediments in Schirmacher Oasis, East Antarctica, reveals rare glacial-interglacial climatic and environmental variations and limited data on the past behavior of the East Antarctic Ice Sheet (EAIS). Magnetic properties of sediments from a radiocarbon-dated core show low values during the Holocene and high values during the last glacial period, indicating strong physical weathering in the catchment area. Shifts in magnetic properties during deglaciation and climate events such as the Antarctic Cold Reversal and the Early Holocene Climate Optimum are documented in the study.
Article
Environmental Sciences
Zhao Wei, Youze Xu, Yanyan Zhao, Yuanyuan Zhao, Leilei Bai, Helong Jiang, Changhui Wang
Summary: This study comprehensively investigated the settling of resuspended sediment particles under different disturbances using five urban lake sediments, finding that particle size has a significant impact on sediment settling dynamics. Smaller particles tend to settle more effectively, highlighting the importance of considering particle size in assessing the pollution risks related to resuspended sediment.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2021)
Article
Chemistry, Physical
Kailash Chandra, Vinod Singh, Saurabh K. Sharma, Pawan K. Kulriya
Summary: By partially replacing Ho3+ with nonmagnetic La3+ in Ho2-xLaxTi2O7 compound, the magnetic and structural behavior was investigated. The study revealed that La doping induces structural ordering and increases the lattice parameter, while weakening the ferromagnetic properties of the compound.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Construction & Building Technology
Fatima Ouendi, Rachid Zentar
Summary: The main objective of this study is to compare sediment particle size ranges as sub materials for sediment recovery in road construction, with a focus on the effects of drying methods on material characteristics. The findings reveal variations in the distribution of organic matter across different size fractions and highlight the significant influence of fine particles on material attributes and environmental characterization.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Ceramics
Prashant Dixit, Bhupender Rawal, Himanshu Sekhar Panda, B. Praveen Kumar
Summary: The combined action of circulatory grinding and bead milling on alumina has been examined, showing that bead milling improves the microstructure and mechanical characteristics of alumina powder. The bead milled samples demonstrated significant improvement in mechanical properties compared to the as-received powder.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
T. Nakata, C. Xu, Y. Ito, S. Kamado
Summary: The effect of homogenization on microstructures and tensile properties in a dilute Mg-Zn-Ca-Mn alloy sheet was investigated. High-temperature homogenization dissolved eutectic intermetallic phases before rolling, but led to significant growth of alpha Mn precipitates and coarse grain structure after rolling and annealing. Rolling without homogenization or after low-temperature homogenization resulted in increased fraction of intermetallic phases, but achieved a fine grain structure due to dispersed alpha Mn precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Geochemistry & Geophysics
Yuqin Wang, Kunpeng Ge, Wyn Williams, Hui Zhou, Huapei Wang, Lesleis Nagy, Lisa Tauxe, Jiang Wang, Shengbo Liu, Yang Liu
Summary: Recent research indicates that particles in the transitional zone between the single domain and single vortex regions are susceptible to thermal and external magnetic field instabilities, potentially impacting the accuracy of paleomagnetic interpretations. This study simulates the magnetic behavior of specific-shaped magnetite particles to evaluate their internal magnetization characteristics and influence on paleomagnetic observations. The findings reveal the size and dominant features of the magnetically unstable zone, highlighting their significance in paleomagnetic records.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Junyi Wang, Zhongtai He, Linlin Li
Summary: Trenching combined with dating techniques is an effective method for studying paleoseismic events, as shown by the study near Hasuhai Lake. However, the results have uncertainties and limitations. This study identified seven paleoseismic events near Hasuhai Lake since 12,000 years ago.
Article
Materials Science, Ceramics
Diego Seiti Fukano Viana, Adilson Jesus Aparecido De Oliveira, Korllvary Rhanddy Charles Parra Jimenez, Flavio Paulo Milton, Jose Antonio Eiras, Guilherme Maia Santos, Ducinei Garcia
Summary: This study investigated the influence of grain size on ferroelectric and magnetic properties in particulate composites, preparing samples with different grain size combinations using a novel sintering method. It was found that the properties were correlated to the grain size of each phase, and that magnetoelectric coefficient could be improved by altering the grain size of both phases, potentially inducing a self-biased effect by reducing the grain size of the ferroelectric phase.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Jai-Lin Tsai, Shi-Min Weng, Cheng Dai, Jyun-You Chen, Xue-Chang Lu, Ting-Wei Hsu
Summary: A FePt(B, Ag, C) granular film was successfully formed by post-annealing B4C/FePt layers at a high substrate temperature, exhibiting high magnetic properties. The study showed that the magnetic anisotropy and coercivity of the film varied with temperature. Additionally, high-resolution TEM images revealed the presence of coupled FePt grains grown on a single MgTiON grain.
Article
Geography, Physical
Sunghan Kim, Min Kyung Lee, Ji Young Shin, Kyu-Cheul Yoo, Jae Il Lee, Myung-Il Kang, Heung Soo Moon, Joseph G. Prebble
Summary: This study investigates the sedimentary processes and environmental factors that control magnetic susceptibility in sedimentary cores from the Bellingshausen Sea continental rise. The results show that the input of terrigenous material increased during Marine Isotope Stages (MIS) 2 and 4, and the variation in magnetic susceptibility values is associated with changes in grain size.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Editorial Material
Geography, Physical
Yougui Song, Shengli Yang, Junsheng Nie, Jinbo Zan, Chunhui Song
Summary: The review summarizes the evolution of paleoclimate and paleoenvironment in Central Asia since the late Pliocene, indicating a long-term drying or desertification trend with at least one major drying event occurring around 0.5-0.6 million years ago. Despite an overall drying trend, the Holocene has been characterized by persistent wet conditions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Brendan T. Reilly, Joseph S. Stoner, Robert G. Hatfield, Mark B. Abbott, David W. Marchetti, Darren J. Larsen, Matthew S. Finkenbinder, Aubrey L. Hillman, Stephen C. Kuehn, Clifford W. Heil
QUATERNARY SCIENCE REVIEWS
(2018)
Article
Geochemistry & Geophysics
Robert G. Hatfield, Benjamin H. Wheeler, Brendan T. Reilly, Joseph S. Stoner, Bernard A. Housen
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2019)
Article
Geography, Physical
Keziah Blake-Mizen, Robert G. Hatfield, Joseph S. Stoner, Anders E. Carlson, Chuang Xuan, Maureen Walczak, Kira T. Lawrence, James E. T. Channell, Ian Bailey
QUATERNARY SCIENCE REVIEWS
(2019)
Article
Geography, Physical
Brendan T. Reilly, Joseph S. Stoner, Alan C. Mix, Maureen H. Walczak, Anne Jennings, Martin Jakobsson, Laurence Dyke, Anna Glueder, Keith Nicholls, Kelly A. Hogan, Larry A. Mayer, Robert G. Hatfield, Sam Albert, Shaun Marcott, Stewart Fallon, Maziet Cheseby
QUATERNARY SCIENCE REVIEWS
(2019)
Article
Environmental Sciences
R. G. Hatfield, A. Woods, S. B. Lehmann, N. Weidhaas, C. Y. Chen, J. Kuck, S. Pierdominici, J. S. Stoner, M. B. Abbott, D. T. Rodbell
JOURNAL OF PALEOLIMNOLOGY
(2020)
Article
Geography, Physical
Katharine E. Solada, Brendan T. Reilly, Joseph S. Stoner, Shanaka L. de Silva, Adonara E. Mucek, Robert G. Hatfield, Indyo Pratomo, Rendi Jamil, Baskoro Setianto
QUATERNARY RESEARCH
(2020)
Article
Geosciences, Multidisciplinary
Robert G. Hatfield, Joseph S. Stoner, Katharine E. Solada, Ann E. Morey, Arielle Woods, Christine Y. Chen, David McGee, Mark B. Abbott, Donald T. Rodbell
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geography, Physical
Christine Y. Chen, David McGee, Arielle Woods, Liseth Perez, Robert G. Hatfield, R. Lawrence Edwards, Hai Cheng, Blas L. Valero-Garces, Sophie B. Lehmann, Joseph S. Stoner, Antje Schwalb, Irit Tal, Geoffrey O. Seltzer, Pedro Miguel Tapia, Mark B. Abbott, Donald T. Rodbell
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Multidisciplinary Sciences
Arielle Woods, Donald T. Rodbell, Mark B. Abbott, Robert G. Hatfield, Christine Y. Chen, Sophie B. Lehmann, David McGee, Nicholas C. Weidhaas, Pedro M. Tapia, Blas L. Valero-Garces, Mark B. Bush, Joseph S. Stoner
NATURE COMMUNICATIONS
(2020)
Article
Geochemistry & Geophysics
R. G. Hatfield, J. S. Stoner, A. J. Fraass
Summary: This study utilizes u-channel paleomagnetic study from IODP Site U1396 in the Caribbean Sea to investigate RPI and directional record extending back 4.5 Ma. The results show magnetic coercivity changes around 2.1 Ma affecting the quality of paleomagnetic record, and filtering spike noise associated with discrete intervals of volcanogenic sediments helps to develop a high-resolution RPI record. The study opens the door for high-resolution RPI chronostratigraphies during the early Pliocene, revealing asymmetrical RPI form and polarity-driven field asymmetries particularly pronounced during this time period.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geography, Physical
Anders E. Carlson, Brian L. Beard, Robert G. Hatfield, Matthew Laffin
Summary: Through sediment geochemistry analysis in the Bellingshausen Sea, this study infers the presence or absence of ice sheets on West Antarctica and the Antarctic Peninsula during the Last Interglacial. The evidence suggests that the West Antarctic Ice Sheet may have been absent during the Last Interglacial, consistent with previous ice core constraints.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
D. T. Rodbell, R. G. Hatfield, M. B. Abbott, C. Y. Chen, A. Woods, J. S. Stoner, D. McGee, P. M. Tapia, M. Bush, B. L. Valero-Garces, S. B. Lehmann, S. Z. Mark, N. C. Weidhaas, A. L. Hillman, D. J. Larsen, G. Delgado, S. A. Katz, K. E. Solada, A. E. Morey, M. Finkenbinder, B. Valencia, A. Rozas-Davila, N. Wattrus, S. M. Colman, M. G. Bustamante, J. Kueck, S. Pierdominici
Summary: This study presents a continuous and independently dated archive of tropical glaciation spanning 700,000 years, using a piston core from Lake Junin. The research finds that tropical glaciers were influenced by changes in global ice volume with an approximately 100,000-year periodicity. An increase in the extent of tropical Andean glaciers relative to global ice volume occurred between 200,000 and 400,000 years ago, during sustained intervals of regionally elevated hydrologic balance that modified the regular approximately 23,000-year pacing of monsoon-driven precipitation. Millennial-scale variations in the extent of tropical Andean glaciers during the last glacial cycle were driven by variations in regional monsoon strength that were linked to temperature perturbations in Greenland ice cores.
Article
Environmental Sciences
Vincent J. Clementi, Yair Rosenthal, Samantha C. Bova, Elizabeth K. Thomas, James D. Wright, Richard A. Mortlock, Owen C. Cowling, Linda Godfrey, Laurel B. Childress
Summary: Submarine groundwater discharge is an important component of the oceanic geochemical budget. Limited knowledge exists regarding its distribution. Through the analysis of pore water data from the Chilean Margin, this study reveals substantial offshore freshening due to deep and focused contributions of meteorically modified geothermal groundwater sourced from a reservoir approximately 2.8 km deep in the Aysen region of Patagonia. This finding highlights the significance of deep submarine groundwater discharge along active margins, which may have implications for coastal biogeochemical processes and tectonic instability.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Correction
Geography, Physical
Christine Y. Chen, David McGee, Arielle Woods, Liseth Perez, Robert G. Hatfield, R. Lawrence Edwards, Hai Cheng, Blas L. Valero-Garces, Sophie B. Lehmann, Joseph S. Stoner, Antje Schwalb, Irit Tal, Geoffrey O. Seltzer, Pedro Miguel Tapia, Mark B. Abbott, Donald T. Rodbell
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Paleontology
Paul N. Pearson
JOURNAL OF MICROPALAEONTOLOGY
(2018)