Preprints
There are 6075 Preprints listed.
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 [...]
An explainable machine learning prediction system for early-warning of heat stress on Florida’s Coral Reef
Published: 2025-06-25
Subjects: Earth Sciences, Environmental Sciences, Marine Biology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Coral reefs are facing increasing threats from rising ocean temperatures, necessitating timely and localized prediction tools to inform reef management and conservation. This study introduces a machine learning framework capable of forecasting the onset of moderate coral heat stress at site-specific resolution on Florida’s Coral Reef. Leveraging the XGBoost algorithm, the data-driven prediction [...]
Food security beyond borders: how crop imports affect drought risk of conflict-affected countries
Published: 2025-06-25
Subjects: Agricultural Science, Agriculture, Climate, Environmental Studies, Hydrology, Meteorology, Natural Resources Management and Policy, Sustainability
Drought events can disrupt food security and increase the risk of violent conflicts. In an interconnected global food system, countries rely on both local food production and imports to meet domestic demand. When assessing the impact of drought risk on national food security, however, imported crops are often overlooked. This study incorporates international crop trade information to understand [...]
Impact of Gas/Liquid Phase Change of CO2 during Injection for Sequestration
Published: 2025-06-25
Subjects: Engineering
Assessment of heavy metal contamination in seawater, sediments, and fish tissues from Msimbazi Bay, Dar es Salaam, Tanzania.
Published: 2025-06-25
Subjects: Life Sciences, Marine Biology, Pharmacology, Toxicology and Environmental Health
Heavy metal pollution in marine environments is a growing concern globally due to its potential threats to aquatic ecosystems and human health. Major industrial zones in Tanzania, including Dar es Salaam city, significantly contribute to heavy metal pollution in aquatic ecosystems. The samples for heavy metal analysis in seawater, sediments, and fish tissues were collected, prepared, and [...]
A SEISMIC MOMENT MAGNITUDE SCALE
Published: 2025-06-24
Subjects: Engineering, Physical Sciences and Mathematics
Theaimofobtaininga single scale for earthquake magnitudes has led many studies in the past to either develop relationships among various existing scales or develop an altogether new scale to represent a wide range of magnitudes on a single scale. Although a reliable and standardized estimation of earthquake size is a basic requirement for all tectonophysical and engineering applications, [...]
Using Physiography as a Lens to Understand Stream Network Expansion and Contraction Across Spatiotemporal Scales
Published: 2025-06-24
Subjects: Hydrology
Non-perennial streams (i.e., streams that cease flowing regularly across time or space) comprise 60% of the global river network and play an important role in the physical, chemical, and biological functions of downstream waters. However, predicting the dynamic spatiotemporal patterns of network expansion and contraction remains a key challenge across regulatory, practitioner, and research [...]
Fibre-optic exploration of the cryosphere
Published: 2025-06-23
Subjects: Physical Sciences and Mathematics
The icy parts of the Earth, known as the cryosphere, are an integral part of the climate system. Comprehensively understanding the cryosphere, requires dense observations, not only of its surface, but also of its internal structure and dynamics. Seismic methods play a central role in this endeavour. Fibre-optic sensing is emerging as valuable complement and alternative to well-established [...]
New methods for predicting the start and other features of the UK (Northern Hemisphere) Sporadic E (Es) radio propagation season
Published: 2025-06-22
Subjects: Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The sporadic E mode of propagation is briefly described and reviewed. The question is posed could we ever predict the start and duration of the main propagation season. A new hypothesis is proposed based on the modulation of planetary weather and wave circulations and their effect on the Es
Mapping textures of polar ice cores using 3D laboratory X-ray microscopy
Published: 2025-06-20
Subjects: Climate, Earth Sciences, Glaciology
Deep ice cores from polar ice sheets enable reconstructions of Earth’s past climate. Ice-core records are therefore crucial for projecting future climate change, however, our ability to interpret them relies on our understanding of polycrystalline-ice microstructures and mechanics. In turn, these microstructures enable modeling of ice flow and large-scale effects of ice-sheet evolution. Since [...]
HydroBlox: AI-Assisted Visual Programming Framework for Enhanced Scientific Reproducibility in Hydrology
Published: 2025-06-20
Subjects: Civil and Environmental Engineering, Computational Engineering, Education, Environmental Engineering, Hydraulic Engineering, Science and Mathematics Education
Scientific workflow reproducibility for hydrological and environmental analyses remains a challenge due to the heterogeneity of data sources, analysis protocols, and evolving visualization needs. This study introduces HydroBlox, a client-side browser-based framework that supports the creation, execution, and export of hydrological workflows using a visual programming interface. The platform [...]
Generative geomodelling: Deep Learning vs. Geostatistics
Published: 2025-06-20
Subjects: Geology, Geophysics and Seismology, Hydrology, Sedimentology, Stratigraphy
Generative geomodelling aims to simulate subsurface facies distributions while honoring multiple types of conditioning data and geological knowledge. This study selects three typical multiple-point statistics (MPS) approaches—Direct Sampling (DS), Quick Sampling (QS), and SNESIM—and two Generative Adversarial Network (GAN) workflows—post-GANs perturbation and GANSim—as representatives to compare [...]
CO2-Based Leaching of Sulfidic Peridotite Drives Critical Mineral Mobilization and Carbonate Precipitation
Published: 2025-06-20
Subjects: Earth Sciences, Geochemistry, Geology
The transition towards green energy requires both carbon dioxide removal and consistent supplies of energy-critical minerals. Injection and mineralization of supercritical CO2 at active mafic and ultramafic-hosted mines provides a potential avenue to achieve both, through the stable geologic storage of carbon and subsequent mobilization of critical metals. A sample from the Eagle occurrence, an [...]