Preprints
There are 7410 Preprints listed.
A process-based framework for regional landslide debris inundation hazard assessment: application to the West Coast region of New Zealand
Published: 2026-08-12
Subjects: Physical Sciences and Mathematics
Regional landslide debris inundation hazard assessments commonly rely on scenario-based formulations that require explicit enumeration of discrete landslide events. While effective for local studies, these approaches are computationally intensive, sensitive to scenario design choices, and difficult to apply consistently at regional scales where landslide catalogues are incomplete and long-term [...]
Obliquity limit of megathrust earthquakes
Published: 2026-08-12
Subjects: Physical Sciences and Mathematics
The largest earthquakes occur on subduction-zone megathrusts, where plates commonly converge obliquely to trenches and generate trench-parallel strain. How this strain is partitioned between megathrust slip and upper-plate deformation remains uncertain, hindering earthquake recurrence estimates. Here we combine global slab geometry, plate motions, and earthquake focal mechanisms to quantify [...]
Model-Free Relative Permeability Estimation and Oil Recovery Prediction in Reservoir Rocks from Capillary Pressure Curves
Published: 2026-08-12
Subjects: Engineering, Physical Sciences and Mathematics
This paper presents and validates a model-free method for predicting the relative permeability and oil recovery of reservoir rocks directly from the shape of the capillary pressure curve, tested against real reservoir core, digital rock models, and a large soil-hydraulic dataset. Relative permeability is the key saturation function governing production forecasts, water cut, and oil recovery in [...]
Specification conformance, grid resolution and inter-code spread in an independent simulation of the SPE11B CO2 storage benchmark
Published: 2026-08-12
Subjects: Geology
Confidence in geological CO2 storage forecasts rests on simulators whose discrepancies are, for the most part, characterised against each other rather than against a truth. We wrote a two-phase, two-component, fully implicit CO2 storage simulator from scratch, ran it on the SPE11B benchmark to the specification's own reporting resolution (840 × 120 cells, 1,000 yr), and used the reimplementation [...]
Locating the Anthropogenic Drivers of Urban Flooding from Centimetre-Resolution Aerial Imagery: A Reproducible Open-Data Pipeline for the Odaw Basin, Accra
Published: 2026-08-12
Subjects: Earth Sciences, Environmental Sciences, Hydrology, Physical Sciences and Mathematics
Recurrent inundation in metropolitan Accra is, on the preponderance of the evidence, an anthropogenic rather than a climatological phenomenon: its proximate determinants are the obstruction of drainage by solid waste and the encroachment of structures onto watercourses. These determinants are metre-scale and therefore invisible to the moderate-resolution satellite imagery on which prior work has [...]
Fabric- and fluid-constrained ⁴⁰Ar/³⁹Ar geochronology of the northeastern Carajás Province, Amazonian Craton: separating hydrothermalism from Rhyacian and Orosirian reworking of Archean crust
Published: 2026-08-12
Subjects: Geology, Tectonics and Structure
The Carajás Province, southeastern Amazonian Craton, is a polycyclic Archean block in which the ages of rocks, hydrothermal minerals and tectonic fabrics need not coincide. We integrate multiscale structural analysis with fabric-constrained ⁴⁰Ar/³⁹Ar geochronology of amphibole, biotite and white mica selected from mapped fabrics or well-defined hydrothermal assemblages. Although the province [...]
IPOC-Deep: a new seismicity catalog for Northern Chile with >2 million events
Published: 2026-08-12
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
We present a novel seismicity catalog for Northern Chile, which covers 17 years (2007--2023) of data and contains more than 2.2 million events. Raw waveform data from nearly 200 stations including a range of temporary deployments were processed with state-of-the-art algorithms for phase picking (EQTransformer) and association (PyOcto), after which we performed absolute event relocation in a 2.5D [...]
Machine Learning for GIS-Based Flood Susceptibility Mapping: A Global Bibliometric and Systematic Review of Research Trends and Future Directions (2005-2026)
Published: 2026-08-12
Subjects: Engineering
Flood susceptibility mapping (FSM) has become an essential component of disaster risk reduction and sustainable environmental management, particularly with the growing frequency and severity of flood events under changing climatic conditions. The integration of Geographic Information Systems (GIS) and machine learning (ML) has significantly improved the accuracy and efficiency of flood [...]
ECMWF SEAS5 Seasonal Precipitation Outlook and Preliminary Rainfall-Based Flood Screening for Iraq: October 2026–January 2027
Published: 2026-08-12
Subjects: Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology, Risk Analysis
This preprint provides a hydrological and hydrogeological interpretation of ECMWF SEAS5 monthly precipitation forecasts for Iraq from October 2026 through January 2027. The analysis uses the ECMWF System 51 ensemble mean initialized on 1 August 2026. The downloaded time-mean total precipitation rate was converted from metres per second to monthly precipitation depth in millimetres using the [...]
Green home-based dialysis and sustainability: A Scoping Review
Published: 2026-08-12
Subjects: Public Health, Rehabilitation and Therapy
Background Climate change is among the foremost threats to global health, and the healthcare sector is itself a substantial source of greenhouse gas (GHG) emissions. Dialysis is one of the most resource- and carbon-intensive treatments in medicine, and homebased modalities have been proposed as a more sustainable alternative to in-centre care. Despite growing interest, the empirical evidence on [...]
Barrier vulnerability following outwash: A balance of overwash and dune gap recovery
Published: 2026-08-11
Subjects: Engineering, Physical Sciences and Mathematics
Existing barrier evolution models only simulate storm impacts from landward-driven flows (overwash), neglecting the impacts of seaward-directed flows (outwash). Here, we modify an existing model to incorporate outwash processes. We find that outwash enhances barrier vulnerability (the tendency to drown) over decadal timescales by scarring the island interior, creating lower, narrower landforms. [...]
Methane emissions intensity mapping from space reveals outsized emissions impact from marginal oil and gas production in the U.S.
Published: 2026-08-09
Subjects: Atmospheric Sciences, Environmental Monitoring, Oil, Gas, and Energy
Methane emissions reduction from the oil/gas sector, the largest industrial methane source, is a widely-recognized effective strategy for slowing the rate of climate warming. There are over 600,000 well-pads in the U.S.; one-fifth produce most of the economic value, while the remainder produce limited oil/gas. We use high-resolution MethaneSAT satellite data covering >80% of US onshore [...]
Spatiotemporal Patterns and Human Accessibility of the July 2026 Northern Algeria Wildfires: An Event-Based Statistical Analysis
Published: 2026-08-08
Subjects: Earth Sciences, Physical Sciences and Mathematics
Northern Algeria experienced a widespread wildfire outbreak between 20 and 24 July 2026, coinciding with an exceptional regional heatwave. This report presents an independent, multi-method statistical analysis of satellite-detected fire activity (NASA VIIRS/FIRMS, n = 4,105 raw detections) to evaluate whether the spatial and temporal structure of these fires — together with their proximity to [...]
Multipole Modeling for Magnetic Microscopy Constrained by Euler Deconvolution
Published: 2026-08-07
Subjects: Earth Sciences, Geophysics and Seismology
Magnetic microscopy is rapidly advancing toward higher spatial resolutions and smaller sensor-to-sample distances. Under these conditions, dipolar approaches become increasingly limited because higher-order magnetic contributions can no longer be neglected when retrieving reliable full-vector information for paleomagnetic and rock magnetic applications. However, multipolar representations often [...]
Hydroclimatic Regime Shifts and Compound Heat–Dry Events in Rajshahi Division, Bangladesh: Integrating Thermal Gradients, Change-Point Detection, and Heat-Driven Dryness Dynamics (1992–2022)
Published: 2026-08-07
Subjects: Climate, Environmental Indicators and Impact Assessment, Environmental Monitoring, Hydrology, Meteorology, Other Earth Sciences, Other Oceanography and Atmospheric Sciences and Meteorology, Statistical Models
Hydroclimatic variability and compound climate extremes are increasingly affecting monsoon-dominated regions of South Asia, particularly drought-prone northwestern Bangladesh. However, integrated assessments of thermal dynamics, atmospheric moisture, land–atmosphere coupling, and compound heat–dry events remain limited in the regional context. Therefore, this study investigated long-term [...]