Preprints
There are 6644 Preprints listed.
Stealth pressurisation of boiling magma limits geodetic detectability of volcanic eruptions
Published: 2026-03-12
Subjects: Earth Sciences, Volcanology
Crystallisation-driven volatile exsolution (second boiling) is widely invoked to pressurise shallow magma reservoirs, yet its ability to generate eruption-triggering overpressure and detectable ground deformation is poorly quantified. We couple phase equilibria with thermal and viscoelastic models of sill-like intrusions to map pressure evolution and geodetic detectability of second boiling. [...]
Open-source GIS-Based Multi-Criteria Flood Risk Model for data-constrained environments
Published: 2026-03-12
Subjects: Earth Sciences
Flooding poses a major hazard across diverse environments and can be particularly difficult to estimate in urban/urbanizing cities without detailed hydrodynamic data/models. This paper presents a GIS-based, multi-criteria model that integrates openly available hydrological, soil, land cover, and drainage network data to produce a relative Flood Risk Index (FRI) at high spatial resolution. A [...]
Mathematical Modeling of Coupled Heat and Mass Transfer with Phase Transitions in Heterogeneous Porous Soils: Mechanism of Soil Moisture Diffusivity Collapse during Freezing
Published: 2026-03-11
Subjects: Physical Sciences and Mathematics
A mathematical model of coupled heat and mass transfer with water–ice–vapor phase transitions in heterogeneous porous soils is developed. The model comprises the Richards equation, the water vapor diffusion equation, and the heat transfer equation, coupled through a temperature-dependent hydraulic conductivity governed by the Kozeny–Carman relation and thermodynamic phase equilibrium described by [...]
crstools 1.0.0: an R package for cartographic analyses
Published: 2026-03-11
Subjects: Earth Sciences, Ecology and Evolutionary Biology, Life Sciences, Physical Sciences and Mathematics
Spatial analyses are central to ecological studies, underpinning applications ranging from species distribution modelling to conservation planning and macroecological inference. However, most of these require translating processes occurring on a spherical surface into a planar map, inevitably introducing distortion biases. Projection choice can therefore influence both visual interpretation and [...]
Coral connectivity: Biophysical drivers, key knowledge gaps and emerging empirical advances
Published: 2026-03-11
Subjects: Life Sciences
Coral reefs are experiencing widespread decline from climate change and anthropogenic stressors, increasing the need to understand the processes that maintain and replenish coral populations. Connectivity—the exchange of individuals between coral populations—underpins population recovery, yet major uncertainties remain in larval biology and behaviour during dispersal and settlement. This review [...]
Data-driven modeling of carbon dioxide and methane fluxes across the Arctic-boreal region: recent achievements and future opportunities
Published: 2026-03-11
Subjects: Earth Sciences
The Arctic-boreal region contains a significant portion of the global carbon reservoir, which is becoming increasingly vulnerable to atmospheric release due to climate change. Thus, it is vital to monitor and model Arctic-boreal carbon flux dynamics to understand the shifting carbon balance. Data-driven statistical and machine learning models are now commonly used to upscale carbon dioxide (CO₂) [...]
Trace element contamination of sand samples by grinding
Published: 2026-03-11
Subjects: Earth Sciences, Environmental Sciences, Geochemistry
Blanks during powdering processes were examined for major and trace elements using inductively coupled plasma mass spectrometry (ICP-MS). Quartz sand (reference CV32.2) was used as a test substrate for powdering with grinding mills of several kinds: an agate mortar grinder, a stainless steel mortar grinder, a hard porcelain mortar grinder, an agate hand mill, and a hard porcelain hand mill. The [...]
Causal Effects of Climatic and Socioeconomic Drivers on Antimicrobial Resistance
Published: 2026-03-10
Subjects: Climate, Environmental Sciences, Public Health
Antimicrobial resistance (AMR) is a rapidly escalating global health crisis threatening human, animal, and environmental well-being. While its spread is often linked to antibiotic use, the complex, nonlinear nature of its environmental and socioeconomic drivers remains poorly understood, rendering traditional analyses insufficient. This study moves beyond simple correlation to investigate the [...]
Drought Adaptation Mapping in the Southern African Development Community: a review
Published: 2026-03-10
Subjects: Environmental Studies
Evidence on how people adapt to drought frequency and severity is expanding, yet remains fragmented and insufficiently informative for assessing progress, limits, equity, and key priorities. Previous global syntheses demonstrate that adaptation is occurring but provide limited insight into how, where, for whom, and with what risks. This scoping review addresses these gaps by mapping peer-reviewed [...]
Slope-dependent riverbed strengthening and the evolution of the threshold for motion in gravel-bed rivers
Published: 2026-03-10
Subjects: Earth Sciences, Geomorphology, Hydrology
The threshold for motion exerts a fundamental control on sediment transport, channel morphology, and fluvial erosion. While channel slope and flow history are known to influence entrainment thresholds in gravel-bed rivers, their interaction has not been explored. We investigate how channel slope modulates riverbed strengthening during low-flow periods. Flume experiments were conducted across [...]
Estimation of the water table position in unconfined aquifers with MODFLOW 6
Published: 2026-03-10
Subjects: Earth Sciences, Engineering, Environmental Sciences, Hydraulic Engineering, Hydrology, Water Resource Management
The numerical estimation of the position of the water table in unconfined aquifers is important for many practical applications. Its determination through observations or analytical methods is restricted to a few cases. Therefore, it is often estimated through numerical simulations, which may be affected by numerical artifacts and/or poor stability. We use MODFLOW to estimate the position of the [...]
GEOCHEMICAL DIAGNOSTICS OF COAL GENOTYPES: METHOD, CALIBRATION, AND BASIN TYPOLOGY
Published: 2026-03-10
Subjects: Physical Sciences and Mathematics
This study presents a geochemical method for discriminating coal types based on vitrinite maceral composition (telinite vs. collinite), using trace element ratios normalized to a reference aluminum content of 1.5%. Analysis of 146 samples from 13 coal basins demonstrates that conventional geochemical proxies (V/Ni, Ni/Co, U/Th, V/Cr) are unreliable for paleoenvironmental interpretation, whereas [...]
Hybrid broadband ground-motion simulation using neural networks with spatial, inter-period, and cross-component correlations
Published: 2026-03-10
Subjects: Civil and Environmental Engineering
Simulated ground motions are increasingly used in earthquake engineering, particularly in regions with sparse strong-motion recordings where constraining non-ergodic ground-motion models (GMMs) remains challenging. Physics-based simulations (PBS) can reproduce key source and wave-propagation effects but are often limited to low frequencies, whereas stochastic methods are computationally efficient [...]
Remote Forcing of Internal Waves in Regional Ocean Models
Published: 2026-03-10
Subjects: Engineering, Physical Sciences and Mathematics
Regional oceanic general circulation models with nested grids are an essential approach to allow the use of higher grid resolutions. High resolution is required for the study of smaller scale processes, such as submesoscale currents and the internal wave field, in particular the baroclinic tide. Limits of available computing power determine the size of the computational grid, setting the [...]
Groundsource: A Dataset of Flood Events from News
Published: 2026-03-10
Subjects: Hydrology