Article
Geosciences, Multidisciplinary
Emma J. Harrison, Brandon McElroy, Jane K. Willenbring
Summary: Measuring rates of valley head migration and determining the timing of canyon-opening are insightful for the evolution of planetary surfaces. Spatial gradients of in situ-produced cosmogenic nuclide concentrations along horizontal transects provide a framework for assessing the migration of valley networks and similar topographic features. We developed a new method for determining the retreat rates of valley heads based on the concentrations of in situ-produced cosmogenic radionuclides in valley walls. This method was applied to a seepage-derived drainage network in Florida, USA, and revealed intermittent network growth.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2022)
Article
Geochemistry & Geophysics
Xingchao Zhang, Jian Huang, Yingzeng Gong, Lili Zhang, Fang Huang
Summary: Zinc isotopes play a crucial role in understanding the biogeochemical cycling of trace metals. This study investigates the variations in zinc isotopes in a loess-paleosol profile and reveals the potential impacts of weathering and biogeochemical processes on the isotopic composition of zinc. The findings provide insights into the role of zinc in natural mineral dust and dust-climate interactions.
GEOCHIMICA ET COSMOCHIMICA ACTA
(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
Geography, Physical
Shahrazad Abu Ghazleh, Stephan Kempe
Summary: A series of lake terraces were discovered on unconsolidated Cambrian siltstones in the Al-Tayan Wadi along the eastern escarpment of the Dead Sea Rift. These terraces represent high stands of the glacial Lake Lisan, showing significant variations in humidity and dryness in the Levant region during different periods.
QUATERNARY INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Yin Lu, Jasper Moernaut, Nicolas Waldmann, Revital Bookman, G. Ian Alsop, Aurelia Hubert-Ferrari, Michael Strasser, Amotz Agnon, Shmuel Marco
Summary: The research found that variable sedimentation rates are not a preconditioning factor for earthquake-triggered mass failure deposits from the Dead Sea depocenter over the past 220 kyr. It also showed that earthquake-triggered mass failures can occur at any lake-level state in the centennial-to-decadal scale, while they are more frequent when lake levels were high and punctuated by large-amplitude fluctuations at the orbital- and millennial-scale.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Shuang Zhao, Dunsheng Xia, Kexin Lu
Summary: The study of Holocene DARs across the Chinese Loess Plateau reveals significant temporal and spatial variations, primarily influenced by the East Asian summer monsoon. Intervals of strong East Asian winter monsoon and anthropogenic activities may also impact DAR. Notably, population increases in dust source areas correspond to high DAR values during the past 2000 years.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geography, Physical
Igor Girault, Dominique Todisco, Attila Ciner, Mehmet Akif Sarikaya, Cengiz Ylldlrlm, Alinelie Quiquerez, Fabiana Martin, Luis Borrero, Derek Fabel, Philippe Grandjean, Carole Nehme, Damase Mouralis
Summary: This study provides a detailed chronology of deglaciation and lake regression in the Cerro Benitez area near the Southern Patagonian Ice Field. The results show that the ice sheet locally thinned by at least 300 meters after a major glacial advance, and the ice-dammed lake experienced slow local regression followed by faster regression. The study also discusses the implications for megafaunal colonization in the area.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Yonaton Goldsmith, Ofer Cohen, Mordechai Stein, Adi Torfstein, Yael Kiro, Yochanan Kushnir, Yuval Bartov, Liran Ben-Moshe, Amos Frumkin, Nadav G. Lensky, Jonathan Keinan, Lilach Gonen, Yehouda Enzel
Summary: This study examines the lake-level variations in the Dead Sea during the Holocene and finds that the early and late Holocene were wetter, while the middle Holocene was relatively dry. This pattern is consistent with distillation records from Levant speleothem caves. The predicted future drying in the Levant is similar in magnitude to the natural hydroclimate variability, highlighting the importance of assessing whether anthropogenic drying is in or out-of-phase with natural climate variability.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Gabriela Torre, Diego Gaiero, Renata Coppo, Nicolas J. Cosentino, Steven L. Goldstein, Francois De Vleeschouwer, Gael Le Roux, Louise Bolge, Yael Kiro, Andre Oliveira Sawakuchi
Summary: The study investigates the provenance of dust in the Pampean loess in central Argentina, providing insight into the paleo-atmospheric circulation in the Southern Hemisphere. The isotopic analysis reveals that the dust mainly originates from the southern Altiplano and southern Puna, and there is a similarity between the paleo-dust and modern dust sources. The study also suggests that changes in atmospheric transport efficiency may better explain dust flux variations in the loess over glacial/interglacial periods.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Jessica E. Tierney, Adi Torfstein, Tripti Bhattacharya
Summary: The eastern Mediterranean is expected to see increasing drought and extreme rainfall. The Dead Sea lacustrine record provides valuable insights into the region's climate change and water balance. Analysis of leaf wax isotopes suggests a coherent regional signature of glacial-interglacial cycles and the interaction between winter rainfall and the Afro-Asian monsoon system.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Yoav Ben Dor, Tomer Flax, Itamar Levitan, Yehouda Enzel, Achim Brauer, Yigal Erel
Summary: Carbonate minerals, such as aragonite, found in sedimentary sequences of endorheic lakes like the Dead Sea and Lake Lisan, provide detailed records of past climatic and hydrologic conditions. This study investigates the process of aragonite precipitation in these lakes through experiments and analysis, shedding light on the factors affecting precipitation rates and mechanisms. The results are crucial for understanding limnogeological processes and hydroclimatic drivers in ancient lake environments.
Article
Geosciences, Multidisciplinary
Uwe Dornbusch
Summary: This study investigates the evolution and erosion history of cliffs in East Sussex, and finds that cliff erosion only started in the past few centuries and is decreasing despite sea level rise. Therefore, understanding the local drivers of coastal cliff erosion is crucial for assessing the future consequences of climate change.
Article
Engineering, Civil
Ibrahim M. Oroud
Summary: An energy balance model was developed to predict the future level, areal extent, and temperature of the Dead Sea under different scenarios. The model integrated energy, water, and salt balances and was verified against measured data. It was found that the future conditions of the Dead Sea would depend on freshwater input and atmospheric forcings, and projections indicated that it would become a dwarfed hypersaline hot lake. The simulations were approximate due to the complexity of the system and uncertainties brought about by climate vagaries and model parameterizations.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Amin Ghafarpour, Farhad Khormali, Xianqiang Meng, Hossein Tazikeh, Thomas Stevens
Summary: The study of carbon and oxygen isotopic compositions of samples from the Mobarakabad section in northern Iran provides insights into late Pleistocene-Holocene climate change in the region. Results suggest a severe drought after 34 ka, with significant shifts in loess sources and depositional environments during this time period. The correlation between delta C-13(bc) and delta O-18(bc) values differentiates phases of loess accumulation and paleosol formation, offering quantitative data for reconstructing paleoclimatic conditions.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Udisha Singh, K. Suresh, Priyesh Prabhat, Waliur Rahaman, Ashwini Kumar
Summary: This study examines the seasonal variation of aeolian dust sources in the northeast Arabian Sea through the analysis of wet deposit particulate samples. The mineralogical composition and isotopic signatures reveal that the Arabian Peninsula and Northeast Africa are the dominant dust sources during the monsoon period, while the Thar desert and Southwest Asia become more prominent at the end of the monsoon.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geology
Alexis Gabriel Rozenbaum, Amir Sandler, Mordechai Stein, Ezra Zilberman
SEDIMENTARY GEOLOGY
(2019)
Article
Geology
Dotan Shaked Gelband, Yael Edelman-Furstenberg, Mordechai Stein, Abraham Starinsky
Article
Geography, Physical
Elan J. Levy, Orit Sivan, Gilad Antler, Mordechai Stein, Boaz Lazar, Yossi Yechieli, Ittai Gavrieli
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Oceanography
Anner Paldor, Oded Katz, Einat Aharonov, Yishai Weinstein, Mia Roditi-Elasar, Ayah Lazar, Boaz Lazar
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Geochemistry & Geophysics
Nurit Weber, Boaz Lazar, Ofra Stern, George Burr, Ittai Gavrieli, Mark Roberts, Mark D. Kurz, Yoseph Yechieli, Mordechai Stein
Article
Geosciences, Multidisciplinary
Rashid Rashid, Anton Eisenhauer, Volker Liebetrau, Jan Fietzke, Florian Bohm, Marlene Wall, Stefan Krause, Andres Ruggeberg, Wolf-Christian Dullo, Hana Jurikova, Elias Samankassou, Boaz Lazar
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geochemistry & Geophysics
Netta Shalev, Boaz Lazar, Ludwik Halicz, Ittai Gavrieli
Summary: The study estimates the magnesium isotope fractionation between magnesium evaporites and modern marine-derived brine, showing that the impact of evaporite formation on seawater magnesium isotope has been insignificant since the Proterozoic. The results suggest that the magnesium isotopic composition of evaporites preserved in the geological record may be used to understand geochemical processes within evaporitic basins and complete the secular variations curve of the marine magnesium isotope record.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geosciences, Multidisciplinary
N. Weber, B. Lazar, I. Gavrieli, Y. Yechieli, M. Stein
Summary: Research shows that the formation of gypsum structures in the hypersaline Dead Sea is closely related to North Atlantic cooling events and grand solar minima, indicating a high sensitivity of regional hydrology to global solar-related events. The temporal occurrence and numbers of gypsum structures seem to follow the Hallstatt Cycle, reaching minima around 3,000-2,000 years ago.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
E. Wurgaft, Z. A. Wang, J. H. Churchill, T. Dellapenna, S. Song, J. Du, M. C. Ringham, T. Rivlin, B. Lazar
Summary: The study investigated the effects of heterogeneous reactions between river-borne particles and the carbonate system in the plumes of the Mississippi and Brazos rivers. The results showed significant removal of dissolved inorganic carbon (DIC) and total alkalinity (TA) due to these reactions, with heterogeneous reactions accounting for a significant fraction of DIC and TA removal in the plume waters. Laboratory experiments confirmed these findings, suggesting that heterogeneous reactions may be an important controlling mechanism of the seawater carbonate system in particle-rich coastal areas.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Civil
Yishai Weinstein, Oren Friedheim, Larisa Odintsov, Yehudit Harlavan, Perach Nuriel, Boaz Lazar, Avihu Burg
Summary: This study presents a method for groundwater dating using radium isotope ratios along the Israeli coast, with implications for seawater intrusion. The results suggest that the age of Pleistocene aquifer groundwater is young, possibly due to recent human activities, while Cretaceous aquifer groundwater is older and may have had a hydraulic connection with the sea.
JOURNAL OF HYDROLOGY
(2021)
Article
Geochemistry & Geophysics
Nurit Weber, Gilad Antler, Boaz Lazar, Mordechai Stein, Yoseph Yechieli, Ittai Gavrieli
Summary: The rapid retreat of the Dead Sea over the past four decades has exposed unique structures of massive gypsum along the shores. These structures are associated with the activity of Ein Qedem-type saline springs discharging Ca-chloride brine to the lake. Field observations, radiocarbon dating, and isotope analysis suggest that the formation of the gypsum structures is related to the mixing of brines from the Dead Sea and ancient Ein Qedem type brine.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geography, Physical
Noa Weil, Mordechai Stein, Yonathan Shaked, Boaz Lazar, Amotz Agnon
Summary: A new relative sea level curve for the Holocene Gulf of Aqaba is presented based on U-Th ages of corals. The study suggests a coeval rise of sea levels in the Indo-Pacific oceans during the early to mid-Holocene, likely due to ice melting.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Limnology
Etai Landou, Boaz Lazar, Julie LaRoche, Katja Fennel, Ilana Berman-Frank
Summary: Dinitrogen (N-2) fixation in the oligotrophic waters of the northern Gulf of Aqaba was investigated using in situ incubations and amplicon sequencing. The study found that N-2 fixation rates were generally low, with non-cyanobacterial diazotrophs being the dominant contributors. During summer stratification, N-2 fixation rates accounted for a significant portion of new production, while during winter mixing, N-2 fixation rates were higher but made up a smaller proportion of new production. Overall, nitrogen sources for new production in the Gulf were mainly from cross-thermocline turbulent diffusion and vertical mixing.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
O. Moav-Barzel, J. Erez, B. Lazar, J. Silverman
Summary: This study compares the changes in calcification and dissolution in the nature reserve reef in the Gulf of Eilat between 2000-2002 and 2015-2016. The results show an increase in calcification but a significant increase in nighttime dissolution in the latter period. This could be attributed to eutrophication caused by fish farming in the area, which led to the development of organisms and factors that contribute to dissolution.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Geography, Physical
Yael Kiro, Steven L. Goldstein, Yochanan Kushnir, Jennifer M. Olson, Louise Bolge, Boaz Lazar, Mordechai Stein
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
