Preprints
There are 5729 Preprints listed.
Continental-Scale Carbonate Sedimentation and Environmental Correlates of the Shuram-Wonoka Excursion
Published: 2025-07-01
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Geology, Paleontology, Physical Sciences and Mathematics, Sedimentology, Stratigraphy
Strata of the Ediacaran Period record many Earth-Life features that distinguish the Neoproterozoic-Phanerozoic transition. However, it is difficult to determine cause and effect relationships between Ediacaran events. Continental-scale patterns of sedimentation have been used as proxies to investigate controls on Phanerozoic macroevolution, including sea level drivers and potential carbon cycling [...]
Determination of REE abundances and Eu isotope ratio in GSJ and NIST feldspar reference standards (JF-1, JF-2, SRM 70a, 70b and SRM 99a) using ICP-QMS and MC-ICP-MS
Published: 2025-07-01
Subjects: Physical Sciences and Mathematics
Rare earth element (REE) concentrations in feldspars provide valuable information for understanding geochemical implications during the evolution of igneous rocks due to magma differentiation. Europium (Eu) is one of the REEs and exists in oxidation states (Eu2+ and Eu3+) states. Eu2+ can be substituted for Ca2+ during plagioclase feldspar crystallization in reducing magmas, which becomes a cause [...]
AI-Assisted Voice Enabled Computing Framework for Hydrological Analysis
Published: 2025-07-01
Subjects: Civil Engineering, Computer and Systems Architecture, Environmental Engineering, Higher Education
This work presents a web-based, voice-enabled, no-code platform for AI-assisted hydrological analysis. The system allows users to interact through natural language—via both text and speech—to retrieve data, utilize hydrological functions, and visualize spatial and analytical outputs. Core components include a conversational AI assistant utilizing Large Language Models, a modular analysis engine [...]
The rapid progress of climate change requires effective concepts for protecting people indoors
Published: 2025-07-01
Subjects: Life Sciences, Medicine and Health Sciences
According to the latest forecasts from the United Nations, it is highly likely that we will miss by a wide margin the 1.5 °C climate target set in the Paris Agreement in 2015. Rather, this planet has to prepare for a global temperature increase of 2.6 - 3.1 °C by 2100 and associated frequently occurring extreme weather events. It is therefore high time to design and technically equip the [...]
Topological and Information-Theoretic Analysis of Climate-Driven Indonesian Throughflow Dynamics
Published: 2025-06-29
Subjects: Applied Mathematics, Climate, Non-linear Dynamics, Oceanography
The Indonesian Throughflow (ITF) represents the sole tropical pathway connecting Pacific and Indian Oceans, yet quantitative understanding of climate mode influences on its variability remains incomplete. We applied information-theoretic and topological frameworks to analyze 34 years (1984-2017) of observational ITF transport data alongside ENSO and IOD indices. Bootstrap analysis revealed [...]
Runoff potential index for upland-lowland drought assessment in rainfed rice using earth observation and mechanistic crop modelling
Published: 2025-06-28
Subjects: Engineering, Life Sciences
Drought vulnerability assessment in agricultural systems remains increasingly critical under climate change, yet current approaches are constrained by limitations of existing topographic indices, particularly in low-gradient terrains where the widely-used Topographic Wetness Index (TWI) exhibits numerical instability and fails to detect critical microtopographic variations that control water [...]
Dynamics of the last ice sheet on the northern fringe of Poland: reconstruction inferred from landform analysis and 10Be surface exposure dating
Published: 2025-06-27
Subjects: Earth Sciences, Geology, Geomorphology
The paper presents new results of glacial landforms mapping and analysis based on high resolution Digital Elevation Model (DEM), and 10Be surface exposure dating of erratic boulders on the northern fringe of Poland. We aimed to reconstruct the main ice-marginal positions, local ice flow directions and timing of the ice margin oscillations during the last deglaciation. A total number of 715 [...]
Field evidence for non-linear IP effects in a volcanic hydrothermal system using reciprocal data.
Published: 2025-06-27
Subjects: Earth Sciences, Physical Sciences and Mathematics, Volcanology
In electrical geophysical methods it is often assumed that the resistivity or chargeability, behaves linearly with the applied electrical current. However, non-linearity has been reported in Induced Polarization (IP) and can be caused by oxidation-reduction reactions or reactions at the surface of clay minerals. Methods to determine the presence of non-linear effects exist and involve analysis of [...]
Mapping upper mantle discontinuities beneath the Australian continent using multimode surface waves and receiver functions
Published: 2025-06-27
Subjects: Earth Sciences, Physical Sciences and Mathematics
Spatial distributions of upper mantle discontinuities beneath the Australian continent are mapped using a large number of station-based 1-D S-velocity profiles with radial anisotropy, derived from joint Bayesian inversions of multimode surface waves and P-wave receiver functions. Numerous permanent and temporary stations across Australia enable us to constrain localized seismic velocity [...]
A Comprehensive Assessment of the FireCCILT11 Global Burned Area Product
Published: 2025-06-27
Subjects: Other Earth Sciences
Multi-component Rayleigh wave dispersion analysis for Vs-depth profiling of Glaciers
Published: 2025-06-27
Subjects: Earth Sciences
Seismic ice velocity estimates provide quantitative constraints on glacial systems including ice thickness, englacial structure, and bedrock topography. Detailed velocity modeling using active-source seismic surveys on glaciers, however, is often challenged by sub-optimal survey acquisition design due to complex field logistics. This study explores new potential of such surveys for characterizing [...]
Assessing Climate and Watershed Controls on Rain-on-Snow Runoff Using XGBoost-SHAP Explainable AI (XAI)
Published: 2025-06-27
Subjects: Climate, Fresh Water Studies, Hydrology, Meteorology, Water Resource Management
Rain-on-snow (ROS) events significantly impact hydrological processes in snowy regions, yet their seasonal drivers remain poorly understood, particularly in low-elevation and low-gradient catchments. This study uses an XGBoost-SHAP explainable artificial intelligence (XAI) model to analyze meteorological and watershed controls on ROS runoff in the Great Lakes Basin. We used daily discharge, [...]
Reevaluating sedimentary signatures of micro-tidal processes in fluvial-dominated rivers: the Po River (Italy)
Published: 2025-06-27
Subjects: Earth Sciences
In microtidally influenced rivers, tides are generally assumed to leave virtually no signatures in the sedimentary record. However, this hypothesis has been surprisingly poorly tested using modern river analogues, which provide an opportunity to assess whether sedimentary signatures of microtidal regimes can develop in rivers that lack diagnostic evidence of tidal control on large-scale channel [...]
A Markov chain Monte Carlo approach for geostatistically simulating mass-conserving subglacial topography
Published: 2025-06-26
Subjects: Glaciology, Other Statistics and Probability
Subglacial topography is critically important for simulating ice sheet evolution and projecting sea-level contributions. However, the subglacial topography of the Antarctic Ice Sheet is sparsely measured. Obtaining a gridded topography map used in ice sheet simulations requires interpolating the sparse measurements or inverting topography from observations of ice velocity and surface elevation. [...]
The association between experiencing environmental injustice and climate attitudes: a nationally representative survey of United States residents
Published: 2025-06-26
Subjects: Environmental Studies
Despite growing public awareness, action to mitigate and adapt to climate impacts remains urgent. Environmental hazards and climate change effects are disproportionately placed on marginalized communities, exacerbating existing inequalities and creating a triple threat for those facing environmental pollution, social vulnerability, and limited adaptive capacity. Using the regulatory scope [...]