Preprints
There are 6168 Preprints listed.
The Subseasonal North Atlantic Oscillation is a Quasi-Semiannual, Propagating Disturbance
Published: 2025-07-04
Subjects: Atmospheric Sciences, Climate
The North Atlantic Oscillation (NAO) is a well-studied mode of regional climate variability, associated with fluctuations in sea-level pressure (SLP), storm tracks, and the North Atlantic jet. These fluctuations have been perceived as a seesawing between two climatic phases, one corresponding to a more poleward jet and the other to a more equatorward. However, recent work has shown that zonal [...]
Hydro3DJS: A Modular Web-Based Library for Real-Time 3D Visualization of Watershed Dynamics and Digital Twin Integration
Published: 2025-07-03
Subjects: Graphics and Human Computer Interfaces, Hydrology
Effective visualization of hydrological data is critical for addressing challenges such as flood risk, water resources management, and climate adaptation. This study introduces Hydro3DJS, a modular, web-based 3D visualization library that integrates real-time environmental data with interactive digital twin capabilities. Developed using JavaScript, WebGL, and Google Maps API, the tool enables [...]
Spatial Analysis of Lead (Pb) Contamination in Soils of the Savar Industrial Zone, Bangladesh Using QGIS-Based Interpolation
Published: 2025-07-03
Subjects: Earth Sciences, Environmental Health and Protection, Environmental Sciences, Life Sciences, Physical Sciences and Mathematics
Lead (Pb) contamination poses significant environmental and public health risks in industrial regions. This study employs Geographic Information Systems (GIS) to assess the spatial distribution of Pb in soils across the Savar industrial zone, Bangladesh—an area characterized by dense industrial activity, including tanneries, textile mills, and metal-processing plants. Using point data from ten [...]
Spatial Analysis and Heatmap Visualization of Groundwater Arsenic Contamination in Dhaka and Mymensingh Divisions, Bangladesh
Published: 2025-07-03
Subjects: Earth Sciences, Environmental Sciences, Life Sciences, Physical Sciences and Mathematics, Physiology
Arsenic contamination in groundwater poses a critical public health threat in Bangladesh, particularly in its central and northern regions. This study investigates the spatial distribution of arsenic concentrations across the Dhaka and Mymensingh divisions using geospatial clustering and interpolation techniques. A total of 1,124 groundwater samples were analyzed using Python-based spatial [...]
Crevasse locations and meltwater delivery to the bed in Pakitsoq, Greenland: Results from MimiNet, a new deep-learning model for crevasse detection
Published: 2025-07-03
Subjects: Physical Sciences and Mathematics
If surface crevasse fields deliver meltwater to the bed of the Greenland Ice Sheet, it would affect seasonal ice flow speeds and total mass balance. Whether they do is not currently known; some evidence suggests so, while specific field data suggest not. To address this gap, we develop MimiNet, a neural-network-based tool that identifies surface crevasse fields. We train MimiNet on Sentinel-1 [...]
River Network HyperGraphs and Transportation Network HyperGraphs: A Graph-Theoretic Approach for Geoscientific and Civil Applications
Published: 2025-07-03
Subjects: Applied Mathematics, Civil Engineering, Environmental Studies, Life Sciences, Mathematics, Other Life Sciences, Other Mathematics, Physical Sciences and Mathematics, Social and Behavioral Sciences
River Network Graphs and Transportation Network Graphs are classical models that represent river systems and transportation infrastructures as vertices and edges, respectively, and underpin applications in hydrological simulation, watershed management, shortest-path computation, and urban traffic analysis. In this paper, we extend these graph-based models into the hypergraph and superhypergraph [...]
Simultaneous spectral induced polarization and X-ray µCT imaging to investigate pore-scale dynamics and geoelectrical responses in porous media
Published: 2025-07-03
Subjects: Engineering, Physical Sciences and Mathematics
Understanding the interplay between pore-scale fluid distribution and bulk electrical properties is critical to improving petrophysical models of partially saturated porous media. This study introduces and evaluates a novel experimental setup that enables synchronized spectral induced polarization (SIP) and X-ray micro-computed tomography (µCT) measurements under dynamic saturation conditions. A [...]
Hydraulic Fracturing in a Confined Space System: Stress State, Fracture Space, and Production Enhancement Mechanism
Published: 2025-07-03
Subjects: Engineering, Mining Engineering
Existing mechanical models for hydraulic fracturing technology are established based on open space systems, assuming fractures are primarily formed through tensile failure. However, the source mechanism of newly created fracture space under confined space conditions with constant total volume remains unclear. This study develops a mechanical model for hydraulic fracturing in confined space [...]
More than a buzzword? Mapping interpretations of the 'polycrisis'
Published: 2025-07-03
Subjects: Social and Behavioral Sciences
“Polycrisis” leapt from Davos into everyday policy talk, yet its meaning remains fluid and sometimes contradictory. To take stock, we asked fifty experts to sort key statements, and Q-method analysis revealed four distinct framings. All agree that polycrisis spills across sectors and borders and reject the view that polycrisis is a mere buzzword. They diverge, however, on how much faith to place [...]
On the demise of Whistler, Horstman and Blackcomb Glaciers, southwest British Columbia, Canada: historical use, recent change and future prospects within a mountain resort
Published: 2025-07-03
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics
Atmospheric warming is causing glaciers worldwide to retreat and disappear, with repercussions for nearby communities. Effects of glacier retreat have been especially consequential for mountain resorts such as Whistler Blackcomb, Canada, where almost 60 years of summer glacier use has been terminated due to the ongoing demise of Whistler, Horstman and Blackcomb Glaciers. Over the past five [...]
Climate Resilient Agriculture Vulnerability Mapping of Indian Districts – Directions for Future Policy Planning
Published: 2025-07-02
Subjects: Bioresource and Agricultural Engineering
Climate change poses significant risks to agriculture, especially in agro-dependent, climatevulnerable regions and states of India. This study applies a machine learning-based Long Short-Term Memory (LSTM) model to assess agricultural risks, climate vulnerability in various Indian states with diverse climatic variables to address India’s 2070 net-zero goal. It addresses the existing research gaps [...]
The case for continuing VIPER - a critical milestone on the journey back to the Moon
Published: 2025-07-02
Subjects: Physical Sciences and Mathematics, Planetary Sciences
NASA's VIPER mission was designed to explore the Moon's south pole region, with a primary objective of identifying and characterising volatile compounds such as water ice. Despite having been fully built and having passed all preflight environmental testing, the mission was cancelled by NASA in July 2024, and the rover remains in storage. In this paper we outline why it remains crucial that a [...]
‘You can’t blame people for risky choices if there are no better options’: Household water safety in the Dominican Republic
Published: 2025-07-02
Subjects: Environmental Studies
Household water insecurity, fractured systems of water delivery, and intermittent water supply hamper efforts to ensure that the water households consume is safe. Household water treatment and safe storage are often advocated as effective, rapidly deployed, and cost-effective solutions to these problems. However, the effectiveness of these measures and household compliance with them often degrade [...]
The 4th Global Coral Bleaching Event: Unprecedented, unbounded, unrelenting
Published: 2025-07-02
Subjects: Environmental Sciences
Increasingly frequent marine heatwaves have escalated the prevalence and extent of mass coral bleaching events. When marine heatwaves impact reef areas across all tropical ocean basins within a common period, global-scale coral bleaching can unfold. Here, we elaborate previous analyses to define set of objective criteria for defining a Global Coral Bleaching Event. Using this definition, we [...]
Machine Learning Insights into the Geochemical Life Cycle of the Columbia River Flood Basalts
Published: 2025-07-02
Subjects: Earth Sciences, Geochemistry, Geology, Physical Sciences and Mathematics, Stratigraphy, Volcanology
Flood basalts are challenging to characterize in detail, despite enormous their erupted volumes, due to their age and chemical homogeneity. Here we explore machine learning (ML) approaches for classification and pattern identification in whole rock geochemical data of the Columbia River Flood Basalts (CRFB), which provide key constraints on magma generation, transport, and emplacement. We utilize [...]