Preprints
There are 6788 Preprints listed.
Fractal Tomography and the Fisher Information Barrier of Seismicity: Addressing the Origin of Dual Paradoxes via Precision-Calibrated Bayesian Inference
Published: 2026-04-11
Subjects: Applied Statistics, Earth Sciences, Geophysics and Seismology, Non-linear Dynamics, Other Statistics and Probability, Physical Sciences and Mathematics, Statistical Methodology, Statistics and Probability, Tectonics and Structure
The spatial organization of seismicity presents dual multi-decade paradoxes: (1) earthquake catalogs exhibit quasi-planar correlation dimensions (D2 ≈ 2.0–2.6) despite volumetric lithospheric deformation (geometric projection paradox), and (2) Bayesian inference systematically yields D3 ≈ 3.0 contradicting structural geology (Bayesian saturation paradox). We address both through the Fractal [...]
Lowering barriers to probing high-frequency variations in river chemistry through a frugal machine learning-based framework
Published: 2026-04-11
Subjects: Biogeochemistry, Environmental Monitoring, Hydrology, Water Resource Management
High-frequency river chemistry monitoring is crucial for capturing transient hydro-geochemical variations and ensuring water security, yet its implementation is limited by logistical and budgetary constraints. Here we present a machine learning-based framework that integrates continuous, low-cost physico-chemical proxies with sparse ‘anchoring’ solute measurements to reconstruct hourly-scale [...]
An End-to-End Workflow for Processing Multilingual Stakeholder Workshop Data: A Soil Health Case Study
Published: 2026-04-11
Subjects: Artificial Intelligence and Robotics, Environmental Monitoring, Soil Science
This paper presents an end-to-end workflow for the collection, analysis, and dissemination of multilingual stakeholder workshop data related to soil health. Stakeholder workshops often produce diverse qualitative and ordinal data which is difficult to process consistently and transparently, especially in multilingual settings. The proposed workflow provides clear guidance for collecting, [...]
Unravelling long-term temporal dynamics of the invasive fruit fly Bactrocera dorsalis along an altitudinal gradient in Morogoro, Eastern Tanzania
Published: 2026-04-11
Subjects: Agriculture
Bactrocera dorsalis (Hendel) is the most economically important invasive fruit fly in sub-Saharan Africa, yet long-term empirical evidence linking its seasonal dynamics to environmental drivers across altitudinal gradients remains limited. We analysed 279 site-month observations of male trap catches (flies per trap per day, FTD) collected between October 2004 and February 2012 at six sites [...]
Climate variability introduces uncertainty into future emissions pathways
Published: 2026-04-11
Subjects: Atmospheric Sciences, Climate, Physical Sciences and Mathematics, Social and Behavioral Sciences
Uncertainty in long-term climate outcomes arises not only from physical processes but also from societal responses to climate variability and change. Here we embed a range of temperature anomalies into an empirically-informed, coupled climate–social model to investigate how natural temperature variability shapes global emissions trajectories. Using Monte Carlo ensembles spanning social, [...]
River Paradigm for Sedentary Mammoth Hunters
Published: 2026-04-11
Subjects: Environmental Studies
Simple forensic systems analysis of Upper Paleolithic mammoth procurement, including analysis of foraging radii, taphonomic representation, portability, caloric costs, hunting and transportation energetics, labor economics, socio-economic and personal vulnerability to predators, and material-handling logistics, prove Upper Paleolithic Mammuthus primigenius were not often hunted, scavenged, [...]
The Evolution of Digital Twins in Hydrology and Environmental Science: From Physical Models to AI-Assisted Autonomous Systems
Published: 2026-04-10
Subjects: Civil and Environmental Engineering, Environmental Engineering
Digital Twin (DT) technologies have emerged as transformative framework in hydrology, enabling adaptive, real-time modeling of water systems through data-driven intelligence. This position paper proposes a five-level technological evolution model for hydrological digital twins, tracing field’s progression over the last three decades (1995-2025) from physical models to autonomous & [...]
Persistent Geochemical Zonation (“Striping”) within the Galápagos Mantle Plume
Published: 2026-04-10
Subjects: Earth Sciences, Physical Sciences and Mathematics
Some hotspot tracks, such as those formed by the Hawai’i and Galápagos mantle plumes, exhibit long-lived cross-track isotopic zonation, thought to reflect the streaking out of heterogeneous material in the plume conduit during upwelling. In lavas associated with the Galápagos mantle plume, three geochemical domains, present for at least 15 Myr, have been identified: northern, southern and [...]
Coupling Coordination and Driving Mechanisms of Land Use and Ecosystem Service Value in the Central Yunnan Urban Agglomeration
Published: 2026-04-10
Subjects: Environmental Studies
ABSTRACT Research Content: This study focuses on the Central Yunnan Urban Agglomeration, analyzing the spatiotemporal evolution characteristics, coupling coordination relationship, and driving mechanisms of land use and ecosystem service value (ESV) from 2010 to 2024. It aims to provide a scientific basis for regional territorial spatial optimization and ecological civilization [...]
HydroScholar AI: A Collaborative Agent for End-to-End Automated Hydrological Research Lifecycle
Published: 2026-04-10
Subjects: Computer Sciences, Earth Sciences, Environmental Sciences, Physical Sciences and Mathematics
Hydrological research relies on multi-stage computational workflows that are often slow, fragmented across disparate tools, and inconsistently documented, limiting reproducibility. This study presents HydroScholar AI, an agentic, human-in-the-loop platform that consolidates the plan-to-paper research lifecycle into a single interactive automated framework. From a natural-language prompt, the [...]
Assessing Future Temperature and Precipitation Responses to Solar Radiation Management in Bangladesh: A Comparative Analysis with SSP Scenarios
Published: 2026-04-10
Subjects: Other Life Sciences
Bangladesh is among the most climate-vulnerable nations globally, facing compounding risks from rising temperatures, shifting precipitation patterns, and intensifying extreme events. This study assesses projected changes in precipitation, maximum temperature (Tmax), and minimum temperature (Tmin) over Bangladesh under two emission pathways — SSP2-4.5 and SSP5-8.5 — and two Solar Radiation [...]
From geochemical to biogeochemical cycles: an organizational view of how (and why) life shaped its conditions of existence
Published: 2026-04-09
Subjects: Biochemistry, Biophysics, and Structural Biology, Biodiversity, Biogeochemistry, Earth Sciences, Life Sciences
Since the seminal work of Maturana and Varela, the Organizational Approach (OA) has defended an organism-centered view of life. This paper argues that the OA must be extended to include the historical, ecological and geochemical processes that sustain biological systems across scales. We develop a multiscale account of closure of constraints (CoC) in which localized closures can emerge and [...]
Calculation of Slope Terrain Movement Rate from Tree Trunk Deformation
Published: 2026-04-09
Subjects: Engineering
Movement of terrain on slopes, unless intense, as in the case of landslides, is practically imperceptible and the deformed trunks of trees growing on slopes are detectors of these movements. The deformation of a tree trunk may therefore be considered as a continuous record of terrain movement for the period of tree vegetation life. The cause of trunk deformation is a slight change in the [...]
Inverse computational morphology of debris and alluvial fans
Published: 2026-04-09
Subjects: Geographic Information Sciences, Geomorphology, Hydraulic Engineering, Hydrology, Numerical Analysis and Scientific Computing
In mountain areas, debris flows and fluvial transport often build up conical deposits at the confluence between steep tributaries and trunk rivers. The resulting debris and alluvial fans typically exhibit a well-defined relationship between slope or elevation and the distance from the fan apex. This relationship, however, becomes more difficult to characterize when fans are constrained by the [...]
Modeling PDC cutter-rock interactions using finite discrete element method for geothermal drilling applications
Published: 2026-04-09
Subjects: Earth Sciences, Physical Sciences and Mathematics
Polycrystalline diamond compact (PDC) cutters are used in geothermal energy drilling operations as they are exceptionally effective due to their strength and resistance to abrasion. It is important to understand the effect of downhole conditions to accurately model rock-cutter-rock interactions, as well as wear on the bit and drilling efficiency. Cutting efficiency is determined through the [...]