Preprints
There are 6976 Preprints listed.
Future Sea Ice-Ocean and Biological Productivity Changes in the North Water Polynya Region under Policy Relevant Warming Levels
Published: 2025-07-31
Subjects: Climate, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The North Water Polynya (NOW) is one of the most productive biological regions in the Arctic with high importance to Inuit and Greenlandic communities. To provide insights into the potential changes of this region as global temperatures rise, we investigated the sea ice, and physical and biological oceanic responses of the NOW to low (2 °C) and high (>3.5 °C) levels of warming using the [...]
Retrieval of Cloud Optical Thickness Based on FY-4B Geostationary Satellite Multichannel Data Combined with Machine Learning
Published: 2026-04-28
Subjects: Earth Sciences
Accurate real-time retrieval of cloud optical thickness (COT) is of great significance for meteorological operations and climate research. To address the limitations of traditional physical methods, which rely on prior parameters, exhibit slow response times, and suffer from poor adaptability, this study proposes a COT retrieval method based on multichannel data from the FY-4B geostationary [...]
Novel methods in corporate ESG education: A case study in Singapore
Published: 2026-02-25
Subjects: Environmental Studies
The increasing importance of Environmental, Social, and Governance (ESG) in corporate strategy necessitates effective educational tools that can bridge the current ESG literacy gap. Yet the effectiveness of play-based ESG education activities remains. This study examines the effectiveness of play-based learning in ESG corporate education by comparing an environment-themed escape room with a [...]
Achieving the Human Right to Sanitation? Container based sanitation and intersectional vulnerabilities in a South African informal settlement
Published: 2026-02-25
Subjects: Public Health
Container based sanitation (CBS) is marketed as an innovative ‘improved’ service with potential to provide ‘safely managed’ sanitation for users in low resource settings. Yet little research has investigated this claim regarding the most marginalised individuals within these populations, many of whom experience myriad intersectional vulnerabilities. This paper examines and compares whether [...]
Flux modulated volcanic-style and magmatic architecture of the Chaxas Volcanic Complex, N. Chile constrained by zircon petrochronology
Published: 2025-07-14
Subjects: Physical Sciences and Mathematics
Zircon petrochronology of the Chaxas Volcanic Complex (N. Chile) reveals dynamic intrusive flux with a corresponding volcanic history that parallels pulses of the regional Altiplano-Puna Volcanic Complex (APVC) flare-up. Two distinct stages of eruptive style and flux are recognized. The Pre-Chaxas stage is comprised of silicic ignimbrites, including the 500 km3 Puripicar Ignimbrite. Pre-Chaxas [...]
Inequality’s contribution to global catastrophic risk
Published: 2026-03-13
Subjects: Agriculture, Environmental Sciences, Human Geography, Nature and Society Relations, Social and Behavioral Sciences
Inequality is rising and so is global catastrophic risk. These two problems are not independent from each other. Inequality has historically been a major driver of social instability, and is increasing the risk of global catastrophes today. We demonstrate this by drawing on the rich literature around societal collapse and global catastrophe from both past and modern societies, highlighting the [...]
Magnetic dual-layer equivalent sources on the sphere
Published: 2026-03-10
Subjects: Geophysics and Seismology
The equivalent source method is widely used for processing and interpolating magnetic data, particularly in airborne surveys. However, implementations based on Cartesian coordinates present limitations at regional and global scales, where Earth curvature introduces geometric inconsistencies that affect data integration and modeling accuracy. To address this problem, this study proposes an [...]
Unsupervised data selection for focused time-lapse inversion in electrical resistivity tomography monitoring
Published: 2025-05-30
Subjects: Physical Sciences and Mathematics
Time-lapse electrical resistivity tomography (TLERT) is a popular technique to monitor subsurface processes. Inversions and interpretation often remain challenging because of noisy data and the superposition of several processes influencing the results. To improve TLERT imaging, we apply clustering of data time series prior to the inversion process. We invert only for a subset of data points [...]
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 [...]
Agentic Modelling Pipeline: Reproducible Rapid Stormwater Modelling Management System with OpenClaw
Published: 2026-03-18
Subjects: Civil and Environmental Engineering, Civil Engineering, Computational Engineering, Engineering, Environmental Engineering, Hydraulic Engineering
Configuring urban hydrological models, such as SWMM, for operational or real-time modelling remains onerous for many models. We propose an Agentic SWMM workflow, which embeds ‘Skills’ and model context protocols to automate model configuration, execution, and extract and plot quantities of interest. To ensure that the entire Agentic SWMM workflow is auditable and reproducible, each run will [...]
A LASSO-based reduced-form CMAQ model for predicting ozone and PM2.5 responses to emission changes in South Korea
Published: 2026-03-31
Subjects: Environmental Sciences
Reduced-form models of the Community Multiscale Air Quality Modeling System (CMAQ) enable efficient prediction of air quality responses to emission changes. In this study, we developed a reduced-form CMAQ model based on the least absolute shrinkage and selection operator (LASSO) to approximate CMAQ outputs in high-dimensional settings where the number of emission variables exceeds the number of [...]
Real-time Forecasting and Operational Control of Perceivable Induced Seismicity in Geo-Energies
Published: 2026-02-25
Subjects: Engineering, Physical Sciences and Mathematics
Geo-energies, including enhanced geothermal systems, geological carbon storage, and underground hydrogen storage, are essential for decarbonizing the energy and heavy industry sectors. However, their widespread implementation is hindered by the risk of perceivable induced seismicity. This review begins by evaluating existing seismic hazard mitigation schemes, particularly the traffic light system [...]
Effect of pulp density on acidulation mechanisms in low-grade phosphate rock using biogenic acid generated by Acidithiobacillus thiooxidans.
Published: 2026-02-25
Subjects: Bioresource and Agricultural Engineering
Phosphorus is essential for global food security, but traditional extraction using thermal and hydrometallurgical methods is hampered by the depletion of deposits and high energy costs. This study evaluates the recovery of low-grade Colombian phosphate rock (5.5% w/w P) through biogenic leaching. Unlike chemical acidulation, which consumes a lot of water and tends to produce disruptive foam, this [...]
Climate Change and Adaptive Strategies for Community Resilience: Insights from the Kamala River Basin, Nepal
Published: 2026-02-25
Subjects: Environmental Studies
Climate change poses an escalating threat to riverine communities worldwide, with flooding remaining the most pervasive and disruptive hazard across Nepal’s river basins. Despite the growing body of climate adaptation research, empirically grounded evidence on how local understanding of climate change shape adaptive practices and community resilience across heterogeneous socio-ecological and [...]
Implementation of Hybrid Genetic-Ant Colony Algorithm (GACA) for Solving Highly Nonlinear Cuttings Transport Models in Directional Foam Drilling
Published: 2026-02-25
Subjects: Geotechnical Engineering, Hydraulic Engineering
Directional foam drilling is widely applied in the development of complex oil and gas resources due to its advantages of low formation damage and high drilling efficiency, but the highly nonlinear cuttings transport model in this process poses great challenges to parameter optimization. To solve this problem, a hybrid genetic-ant colony algorithm (GACA) is proposed, which integrates the global [...]