Preprints

There are 4072 Preprints listed.

Hydrous Melting of the Metasomatized Asthenospheric Mantle Below East Asia Producing LOMU Type Alkali Basalts: New insights from Higashi-Matsuura rear-arc Basalts, Kyushu, Japan

Bidisha Dey, Tomoyuki Shibata, Masako Yoshikawa

Published: 2023-08-29
Subjects: Geochemistry, Geology, Volcanology

Alkali basalts with distinctive time-integrated low U/Pb (low µ, LOMU) have been reported in East Asia from the arc, rear-arc, forearc and intraplate volcanoes in northeast China, Korea, Sea of Japan, and the Petit Spot near the Japan Trench. The origin of these alkali basalts in East Asia is controversial due to the complex geochemical and tectonic signatures reported from this region. We report [...]

Yield strength determination based on dissipative energetic transition

Martin Lesueur, Xinrui Zhang, Hadrien Rattez, et al.

Published: 2023-08-29
Subjects: Applied Mechanics, Civil Engineering, Earth Sciences

Mechanical yield strength is one of the most crucial mechanical properties to consider to remain operating in safe elastic regimes. Despite its importance, it remains ambiguous to measure as different disciplines acknowledge different definitions. Most common examples include the deviation from linear elasticity or the peak stress. This difference has significant consequences for the modelling of [...]

What can radar-based measures of subglacial hydrology tell us about basal shear stress? A case study at Thwaites Glacier, West Antarctica

Rohaiz Haris, Winnie Chu, Alexander Robel

Published: 2023-08-29
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics

Ice sheet models use observations to infer basal shear stress, but the variety of methods and datasets available has resulted in a wide range of estimates. Radar-based metrics such as reflectivity and specularity have been used to characterize subglacial hydrologic conditions that are linked to spatial variations in basal shear stress. We explore whether radar metrics can be used to inform models [...]

Changing Water Supplies and Solutions to the Water Crisis: An Earth Systems Analysis of the American Southwest

Raghav Sriram

Published: 2023-08-27
Subjects: Water Resource Management

The pressing issue of water scarcity in the Southwestern United States has been a topic of increasing concern in recent years. To address this critical problem, this research-driven essay aims to conduct an in-depth earth systems analysis to evaluate the complexities and implications of water shortages in the region. The study centers on three main objectives: (1) identifying the underlying [...]

Lithium isotope constraints on the plumeworld hypothesis for the Marinoan Snowball Earth

Tian Gan, Meng Tian, Xi-Kai Wang, et al.

Published: 2023-08-26
Subjects: Earth Sciences, Geochemistry, Physical Sciences and Mathematics

The Snowball Earth hypothesis predicts that continental chemical weathering was curtailed substantially during but rebounded strongly after the Marinoan ice age some 635 million years ago. Defrosting the planet would result in a plume of fresh glacial meltwater with a different chemical composition than underlying hypersaline seawater, generating an onshore-offshore geochemical gradient. Here we [...]

Monogenetic volcanoes as windows into transcrustal mush: A case study of Slamet and Loyang volcanoes, Central Java

Nicholas Dewitt Barber, Sophie L Baldwin, Marie Edmonds, et al.

Published: 2023-08-26
Subjects: Volcanology

Monogenetic volcanic "fields (MVFs) are commonly associated with long-lived polygenetic composite volcanoes in many tectonic settings. The association between polygenetic and monogenetic volcanoes has raised questions as to the source of monogenetic melts – specifically, whether they are derived from the transcrustal mush underlying a nearby polygenetic volcano, or from a different batch of [...]

Laboratory and field investigations to characterize the resistivity and induced polarization response of heterogeneous coastal aquifers

Cong-Thi Diep, Pham Dieu Linh, David Caterina, et al.

Published: 2023-08-24
Subjects: Engineering

The lithological and stratigraphical heterogeneity of coastal aquifers has a great influence on saltwater intrusion (SI). This makes it difficult to predict SI pathways and their persistence in time. In this context, electrical resistivity tomography (ERT) and induced polarization (IP) methods are receiving increasing attention regarding the discrimination between saltwater-bearing and clayey [...]

Bacteriological quality of household drinking water and cholera risk in the Greater Accra Region, Ghana

Anthony Zunuo Dongdem, Bismark Sarfo, Adolphina Addo-Lartey, et al.

Published: 2023-08-24
Subjects: Public Health

Background The bacteriological quality of drinking water plays a critical role in preventing waterborne diseases. In Ghana, there is water scarcity and many communities depend on contaminated water sources for their domestic use. This study aimed to assess the microbiological quality of household drinking water in both cholera endemic and non-endemic areas in Greater Accra Region. Methods A [...]

Sea Ice Loss, Water Vapor Increases, and Their Interactions with Atmospheric Energy Transport in Driving Seasonal Polar Amplification

Po-Chun Chung, Nicole Feldl

Published: 2023-08-24
Subjects: Physical Sciences and Mathematics

The ice-albedo feedback associated with sea ice loss contributes to polar amplification, while the water vapor feedback contributes to tropical amplification of surface warming. However, these feedbacks are not independent of atmospheric energy transport, raising the possibility of complex interactions that may obscure the drivers of polar amplification, in particular its manifestation across the [...]

Why is it critical to revisit significance and consequences of salt precipitation during CO2 injection?

Mohammad Nooraiepour, Mohammad Masoudi, Helge Hellevang, et al.

Published: 2023-08-24
Subjects: Earth Sciences, Environmental Sciences, Geochemistry

Among the candidates for CO2 sequestration, deep saline aquifers are considered the best option because of their storage capacity and proximity to emission sources. Injection of large volumes (million tons scale) of supercritical CO2 into the geological formations causes evaporation of formation water near wellbores and precipitation of salt crystals inside the porous medium. CO2-induced salt [...]

A Review of the Interactions between Tropical Cyclones and Environmental Vertical Wind Shear

Rosimar Rios-Berrios, Peter Finocchio, Joshua Alland, et al.

Published: 2023-08-24
Subjects: Atmospheric Sciences

Tropical cyclone (TC) structure and intensity are strongly modulated by interactions with deep-layer vertical wind shear (VWS)—the vector difference between horizontal winds at 200 and 850 hPa. This paper presents a comprehensive review of more than a century of research on TC-VWS interactions. The literature broadly agrees that a TC vortex becomes vertically tilted, precipitation organizes into [...]

Forecast of Earthquake Magnitude for North-West (NW) Indian Region Using Machine Learning Techniques

Aditya Gupta, Babita Sharma, Prasanta Chingtham

Published: 2023-08-24
Subjects: Geophysics and Seismology

Earthquakes have posed significant hazards to human lives and infrastructure for as far back as can be recalled. This paper presents a Machine Learning (ML) based approach for earthquake magnitude forecasting spatially using the earthquake clustering in five selected zones of NW Indian region. Previous research efforts have primarily relied on empirical relationships and statistical models, which [...]

Garnet zoning patterns record multiple processes of chemical transfer during subduction

Freya Roxanne George, Daniel R Viete, Janaína N. Ávila, et al.

Published: 2023-08-24
Subjects: Geology, Other Earth Sciences

Subduction facilitates the transfer of volatiles from the Earth’s surface to its interior. However, the rock-scale processes that govern the efficiency of deep volatile transfer are not fully understood. Garnets from subduction zone rocks commonly have fine-scale, oscillatory elemental zoning that is typically considered to record external fluid ingress/transfer. Elemental and oxygen-isotope [...]

The Outflow Interactions Between Binary Tropical Cyclones

Lulabel Ruiz Seitz, Laurel Regibeau-Rockett, Ipshita Dey, et al.

Published: 2023-08-23
Subjects: Atmospheric Sciences

The three-dimensional representation of an outflow jet can be used to assess whether interactions may have occurred between the outflows of binary, or spatially proximate, tropical cyclones, as outflow jets represent a dominant portion of the upper-tropospheric outflow for TCs. A novel algorithm, POJ3, for identifying and creating a three-dimensional representation of the principal outflow jet(s) [...]

Determining the Pressure – Temperature – Composition (P-T-X) conditions of magma storage

Penny E Wieser, Matthew Gleeson, Simon Matthews, et al.

Published: 2023-08-23
Subjects: Earth Sciences, Physical Sciences and Mathematics, Volcanology

Determining the pressures and temperatures at which melts are stored in the crust and upper mantle, and the major element composition, redox state and volatile contents of these melts, is vital to constrain the structure and dynamics of magmatic plumbing systems. In turn, constraining these parameters helps understand the geochemical and structural evolution of the Earth’s lithosphere, and [...]

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