Preprints
There are 7994 Preprints listed.
A domain-specific atomistic model for Earth’s core materials
Published: 2026-11-04
Subjects: Earth Sciences, Mineral Physics
Understanding Earth’s core requires accurate descriptions of multicomponent iron alloys under extreme conditions. Here, we develop the Earth’s Core Atomistic Model (ECAM) for Fe–Ni–S–Si–O–C–H alloys through sampling with a foundational atomistic model, targeted ab initio simulations, and iterative exploration. A compact dataset selected from nearly half a million configurations is consistently [...]
Geological concept revision during appraisal drilling: a replay of the McLeod VMS deposit, Matagami
Published: 2026-11-04
Subjects: Physical Sciences and Mathematics
Appraisal drilling is designed around a geological concept, yet discovery records show that such concepts are often partly wrong and revised late. We propose a procedure that updates the geological concept during drilling and quantifies the cost of delayed revision. The concept is written as a lattice of geological elements, each present or absent with a prior weight, so that revision becomes [...]
Development and validation of a field-compatible workflow for molecular diagnostics of microbial water quality
Published: 2026-11-04
Subjects: Microbiology
Molecular diagnostics provide advantages in many areas of water quality analysis compared to cultivation-based methods, yet their implementation remains limited mainly due to reliance on specialized instruments, trained personnel and regulatory barriers. To bridge this gap, we developed and evaluated a rapid and field-compatible workflow for the assessment of microbiological water quality. The [...]
Meteorological associations of hourly PM₂.₅ in Lhasa, Tibetan Plateau: antecedent weather, trend specification and out-of-sample evaluation
Published: 2026-11-03
Subjects: Oceanography and Atmospheric Sciences and Meteorology
Statistical models that relate PM₂.₅ to meteorology are widely used to separate weather from emission effects, but they are rarely evaluated out of sample in clean, high-altitude cities, and the role of their trend term is seldom examined. This study fitted penalized additive spline models to hourly city-average PM₂.₅ in Lhasa, Tibetan Plateau (about 3,650 m a.s.l.), for 2019–2024 (51,955 valid [...]
The width beyond a static arrest point predicts which static arrests span the fault
Published: 2026-11-03
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
Population models treat a static arrest as the end of the rupture, although some of those arrests span the fault in a fully dynamic calculation. This paper tests whether the static crack itself shows which ones. A static stress-intensity criterion and a fully dynamic rupture were compared on 180 new random stress fields on one 120 km antiplane fault with linear slip weakening. The predictor is [...]
Instantaneous State InSAR: Smoothness Doublet and Ambiguity Resolution
Published: 2026-11-03
Subjects: Engineering
Instantaneous state InSAR (ISI) enables epoch-wise parameterization, estimation and prediction for the dynamic motion of individual scatterers in near real-time displacement monitoring. Yet, it introduces a coupling problem: the state prediction (time-update) and the integer ambiguity resolution of double difference phase (measurement-update) depend on each other in a recursive loop. An [...]
Transition from buoyancy-driven to shear-driven melting in a buoyant plume at a vertical ice face
Published: 2026-11-03
Subjects: Fluid Dynamics, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Physics
Melting of a vertical ice face in otherwise quiescent saline water generates a buoyant plume that rises along the ice. Heat and salt transfer through the thin near-wall boundary layers controls the melt rate and must be parameterized in models that do not resolve these layers. In plume models, the three-equation framework of Holland \& Jenkins (1999) is commonly coupled to transfer laws based [...]
New Scalar Measures of Geodetic Strain and Moment Rate from Kinematic Mode Decomposition: Application to the Southwestern United States
Published: 2026-11-03
Subjects: Earth Sciences
Scalar representations of geodetic strain rate tensors are widely used to characterize crustal deformation and, in seismic hazard assessment, to convert strain rate to expected seismic moment rate. Existing scalar definitions of shear strain rate, total strain rate and deformation style are not defined consistently and, because they depend on eigenvalues that carry both dilatation and shear, [...]
Fertile or Barren: an open benchmark for testing geochemical fertility indices on mineralized and barren mafic-ultramafic intrusions.
Published: 2026-11-03
Subjects: Earth Sciences, Environmental Sciences, Geochemistry, Geology, Natural Resource Economics, Natural Resources Management and Policy, Oil, Gas, and Energy, Physical Sciences and Mathematics, Tectonics and Structure, Volcanology
Magmatic Ni-Cu-PGE sulfide deposits form through a sequence of processes (e.g., magma generation, transport, crustal interaction, sulfur saturation, and sulfide accumulation). These processes can modify whole-rock compositions in different ways, making it challenging to evaluate the geochemical fertility of mafic-ultramafic magmatic intrusions. Several whole-rock fertility indices have been [...]
Repeatability-dependent detection thresholds for time-lapse seismic CO₂ monitoring
Published: 2026-11-03
Subjects: Geophysics and Seismology
We quantify the smallest CO₂ layer that a time-lapse seismic survey pair can detect as a function of repeatability, measured by the normalized root-mean-square (NRMS) difference, in a Sleipner-like synthetic study. Gassmann fluid substitution under four mixing treatments feeds one-dimensional layer models, checked against two-dimensional finite-difference gathers, and calibrated nonrepeatability [...]
Efficient Uncertainty Quantification for Marine CSEM via Swi-DREI: A Physics-Driven Deep Reparameterization Ensemble Approach with Implicit Regularization
Published: 2026-11-03
Subjects: Physical Sciences and Mathematics
Marine controlled-source electromagnetic (MCSEM) method serves as a pivotal geophysical tool for characterizing deep-sea hydrocarbon reservoirs or gas hydrates. However, restricted by the exponential decay of EM fields in conductive media and the spatial incompleteness of data acquisition systems, the inverse problem faces challenges of severe non-linearity and non-uniqueness. This study develops [...]
An unprecedented Mediterranean tropical cyclogenesis attempt above extreme sea surface temperatures?
Published: 2026-11-03
Subjects: Atmospheric Sciences, Climate, Meteorology, Oceanography and Atmospheric Sciences and Meteorology
On 3-4 October 2026, a strong and organized mesoscale convective system (MCS) developed over the Balearic Sea in the Western Mediterranean, and produced torrential rainfall in the Barcelona area, with up to 248 mm at Granollers (230 mm in 8 hours; 65 mm in an hour). The event occurred without discernible large-scale forcing from an upper-level cut-off low or trough, while western Mediterranean [...]
Predictive modeling of microbial biomineralization across scales
Published: 2026-11-03
Subjects: Biogeochemistry, Earth Sciences, Environmental Microbiology and Microbial Ecology Life Sciences, Life Sciences, Microbiology, Physical Sciences and Mathematics
Microorganisms influence mineral formation and transformation in natural and engineered environments, with consequences for element cycling, contaminant mobility, and mineral records. Predicting these processes remains difficult because microbial activity, local aqueous chemistry, interfacial reactions, and mineral formation operate across different spatial and temporal scales. Here, we review [...]
One island, three countries: aquaculture ponds explain the cross-border gap in mangrove loss on Borneo
Published: 2026-11-02
Subjects: Environmental Indicators and Impact Assessment, Environmental Monitoring, Natural Resources and Conservation, Natural Resources Management and Policy, Remote Sensing, Terrestrial and Aquatic Ecology
Borneo's mangroves share one coastline, climate and sediment regime, yet they are governed by three countries. Using the annual Global Mangrove Watch v4.1 series and open data, this study asks why mangrove in Indonesian Kalimantan is lost faster than in Malaysian Borneo and Brunei, and tests three explanations: protected-area performance, conversion pathways and El Niño sea-level fall. Between [...]
No Universal Urban Form Heat Relationship: Contrasting Thermal Controls in African Cities
Published: 2026-11-02
Subjects: Geographic Information Sciences, Human Geography, Physical and Environmental Geography, Remote Sensing, Spatial Science
Rapid urbanization and climate change have intensified urban heat island effects. Tropical African cities face particularly high heat vulnerability, yet they remain underrepresented in urban thermal research. Existing research often assumes universal morphology temperature relationships, lacking cross city comparative evidence and spatially rigorous nonlinear attribution in African contexts. This [...]