Preprints
There are 7999 Preprints listed.
ATMOSPHERIC DEPOSITION AND SOURCE APPORTIONMENT OF MERCURY AND LEAD OVER THE LAST 150 YEARS IN HIGHLAND PEATLANDS OF SOUTHEASTERN BRAZIL
Published: 2026-05-28
Subjects: Biogeochemistry, Geochemistry
Trace elements like mercury (Hg) and lead (Pb) are major global pollutants subject to long-range atmospheric transport, posing a threat for human and environmental health at a global scale. Both have a great affinity with organic matter and show limited mobility in soils under stable environmental conditions. Therefore, peatlands efficiently trap and act as reliable archives of changes in [...]
Automated Load–Settlement Prediction of Shallow Foundations from Pushed-in PENCEL Pressuremeter Data Based on Briaud (2007) Method: A Python-Based Framework
Published: 2025-07-25
Subjects: Engineering
This study presents a fully automated, Python-based framework for predicting shallow foundation settlements from pushed-in PENCEL pressuremeter (PPMT) data, using an adapted implementation of Briaud’s (2007) method. The framework transforms raw in-situ test results into design-grade load–settlement curves by automating key analytical steps, including borehole wall-point detection, Lemée-type [...]
Understanding historical and projected compound change on the Northwest Atlantic shelf
Published: 2025-07-25
Subjects: Oceanography and Atmospheric Sciences and Meteorology
Increasing atmospheric carbon dioxide concentrations are accompanied by ocean acidification, oxygen loss, and warming of the global ocean. However, in coastal environments, local processes that occur on small spatial scales can moderate or exacerbate these trends. These processes are not well represented in global climate models. Therefore, downscaled tools are useful to decipher carbonate system [...]
Geochemical characteristics of orthopyroxene-bearing metamorphosed lithologies in the northern Chilka lake area, Eastern Ghats belt, India: Insights into the original nature and petrogenesis of precursors
Published: 2025-07-25
Subjects: Earth Sciences, Geochemistry, Geology, Physical Sciences and Mathematics
The northern Chilka Lake area stone quarries expose a high-grade terrane comprising a metapelitic suite interbanded with orthopyroxene-bearing gneisses and garnet-biotite leucogneisses (leptynites). This study presents bulk-rock and mineral chemistry data of the orthopyroxene-bearing units to evaluate the true nature of their protoliths and to comment on their petrogenesis. Field, petrographic, [...]
Quantum Entropy & Probabilistic Clustering for Uncertainty-Aware Groundwater Quality Assessment in Geochemically Complex Terrains of Eastern India
Published: 2025-07-25
Subjects: Education, Physical Sciences and Mathematics
Groundwater quality assessment in geochemically heterogeneous regions is often constrained by deterministic models that overlook spatial variability, inter-parameter dependencies, and system uncertainty. This study proposes a novel Quantum Entropy-based Groundwater Quality Index (QEGWI), which leverages von Neumann entropy derived from quantum density matrices to weight hydrogeochemical [...]
Seismic precursors to the Blatten, Switzerland landslide revealed by unsupervised machine learning
Published: 2025-07-25
Subjects: Physical Sciences and Mathematics
The transition from stable to unstable states in geological systems, such as landslides and fault zones, remains poorly understood. Seismic precursors and foreshocks related to the transition are often difficult to observe and the interpretation remains challenging. Here, we report an observation of the nucleation process preceding the glacial landslide on May~28,~2025 in the village of Blatten, [...]
Oxic methane production in shallow productive lakes: linking field and in vitro experimental evidence
Published: 2025-07-30
Subjects: Microbiology, Terrestrial and Aquatic Ecology
Whereas the occurrence of oxic methane (CH₄) production (OMP) in the oxygenated water column of lakes is widely accepted, its mechanisms, isotopic signature, and contribution to total CH₄ emissions remain uncertain. Evidence suggests that phytoplankton produces CH₄, but it is unclear to what extent this pathway contributes to ecosystem OMP rates. Shallow lakes are often productive and feature [...]
From sectoral silos to climate hegemony: analysis of global urban policies (1984-2025)
Published: 2026-04-23
Subjects: Life Sciences, Physical Sciences and Mathematics
Contemporary urban environmental governance faces a paradox: while international frameworks advocate integration, climate discourse appears to subsume. This study analyzed 202 urban policies from 85 countries (1984-2025) using various methods, temporal discourse analysis, keyword co-occurrence networks, framing detection, and sentiment analysis. Policies accelerated exponentially, with 2010-2025 [...]
Best practices for the analyses of CO2 fluids by Raman Spectroscopy
Published: 2025-08-15
Subjects: Earth Sciences, Physical Sciences and Mathematics, Volcanology
Raman spectroscopy is a key method for determining CO₂ densities in geological fluids, yet acquisition, densimeter calibration, and spectral processing methodologies vary widely between laboratories. However, the precision of this method, and the broader applicability of densimeters generated in a single lab, are still debated. This study describes a series of tests to determine how different [...]
Comparing Process-Based and Machine Learning Models for Streamflow Prediction in the Kaligandaki River Basin, Nepal
Published: 2026-06-03
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Sciences, Hydrology, Physical Sciences and Mathematics, Water Resource Management
Reliable daily streamflow prediction is critical for hydropower operations, flood risk management, and irrigation planning in monsoon-dominated Himalayan river basins. While both process-based and machine learning (ML) approaches have been used for such tasks, systematic comparisons that decompose the sources of performance differences remain scarce. This study evaluates seven configurations: a [...]
Geological controls on Underground Hydrogen Storage in depleted gas fields
Published: 2026-03-27
Subjects: Earth Sciences, Environmental Sciences, Geology, Oil, Gas, and Energy, Other Civil and Environmental Engineering, Sustainability
The geological storage of hydrogen is an alternative for large-scale energy storage in support of expanding renewable energy systems. The North Sea has hundreds of depleted gas fields that are potential storage sites. Robust screening procedures are necessary to select the most suitable reservoirs in terms of geology. This study investigates the geological controls on hydrogen storage in depleted [...]
Nanoscale Interfacial Dissolution-Precipitation Reactions Drive Incipient Carbon Mineralization at the Tamarack Intrusive Complex Peridotite
Published: 2025-07-30
Subjects: Physical Sciences and Mathematics
The Tamarack ultramafic intrusion in Minnesota, USA may be suited to host concurrent carbon sequestration and critical mineral recovery. These dual capabilities are vital to reduce carbon emissions and supply metals (e.g. nickel) necessary for electric vehicles and other rapidly upscaling energy technologies. To understand carbonation reaction pathways and assess carbon sequestration potential in [...]
Iran’s sustainability gap under sanctions: An ARDL-ECM analysis of the load capacity factor
Published: 2025-07-29
Subjects: Environmental Studies
Ecological sustainability depends on the compatibility of demand arising from human activities with ecosystems’ biological regenerative capacity. The consumption-based load capacity factor (LCF) represents this balance as the ratio of domestic biocapacity per capita to the ecological footprint of consumption per capita. This study examines how income, capital formation, and energy use are [...]
www.SewageMap.co.uk and POOPy: Open-source tools for understanding and communicating the environmental impacts of combined sewer overflows in real-time
Published: 2025-07-30
Subjects: Earth Sciences, Environmental Sciences, Outdoor Education
Combined Sewer Overflow (CSO) discharges occur when combined sewer systems exceed capacity leading to the discharge of untreated sewage and storm-water into rivers and seas. These events introduce pollutants such as microplastics, pharmaceuticals, and faecal matter into the environment, negatively impacting water-quality & ecosystems, as well as posing a risk to public health. In England, UK, [...]
Associations between Climate Change and Infectious Diseases: A Systematic Review
Published: 2025-12-03
Subjects: Public Health
Climate change is increasingly recognized as a major driver of infectious disease dynamics, influencing disease distribution, seasonality, and outbreak intensity. This systematic review synthesizes evidence on how climate variability affects infectious diseases and evaluates predictive modeling approaches. Following PRISMA guidelines, we searched Web of Science, PubMed, Embase, and Scopus for [...]