Preprints
There are 5889 Preprints listed.
Screening Global Solar and Wind Energy Investment Potential Accounting for Drought and Surplus
Published: 2025-07-14
Subjects: Environmental Engineering, Oil, Gas, and Energy, Risk Analysis, Sustainability
Climate-induced variability of solar and wind energy impacts renewable electricity scaling. Long duration renewable energy droughts, i.e., extended periods of renewable supply deficits, lead to contract penalties or use of thermo-electric sources, while long duration surpluses result in curtailment or in low energy prices and revenue. We present the first global assessment of the implied [...]
Volcano-tectonic controls on magmatic evolution at Campi Flegrei, Italy: insights from thermodynamic modelling
Published: 2025-07-14
Subjects: Earth Sciences, Geochemistry, Physical Sciences and Mathematics, Volcanology
Campi Flegrei caldera (Naples, southern Italy) is one of the most hazardous volcanoes on Earth, having produced more than 70 eruptions in the past 15 kyr, and currently showing significant signs of unrest within a densely populated part of Europe. Post-15 ka eruptions span a range of eruptive styles and compositions, which broadly correlate with the spatial and structural location of vents within [...]
Flux Modulated Magmatic Architecture in Continental Magmatic Arcs
Published: 2025-07-14
Subjects: Physical Sciences and Mathematics
Petrochronology of the magmatic reservoir that underpinned the Chaxas Volcanic Complex for the duration of its 8.59 – 1.24 Ma lifecycle reveals that magmatic architecture can be regulated by magmatic flux. Modulation of the magmatic reservoir was controlled via two distinct flux regimes during the Pre-Chaxas and Chaxas Complex stages of the Chaxas Volcanic Complex, emphasizing the dynamic nature [...]
Microbe-vegetation-nutrient interactions affect long-term carbon accumulation in a northern peatland
Published: 2025-07-13
Subjects: Environmental Sciences
Recommendations for improving the design, amenity and performance of privately owned, small-scale biobasins
Published: 2025-07-13
Subjects: Engineering, Life Sciences
Due to spatial constraints in cities, it is increasingly challenging to integrate appropriate water sensitive urban design (WSUD) solutions. There has been a shift from larger, precinct-scale bioretention systems owned by local governments to smaller scale ‘biobasins’ managed by private landholders. This shift has brought about unique challenges in regulation, design, maintenance, and [...]
A Critical Review of Life Cycle Assessment in Shrimp Aquaculture: Uncovering Methodological Dominance and Analytical Blind Spots
Published: 2025-07-12
Subjects: Life Sciences
Life Cycle Assessment (LCA) is increasingly used to evaluate the environmental impacts of shrimp aquaculture, a rapidly expanding global food sector. However, existing shrimp LCA studies report widely divergent results, varying by more than fiftyfold across key impact categories. This systematic review identified 16 peer-reviewed shrimp LCAs and investigates the reasons for these discrepancies, [...]
Thermal analysis of meso-scale high-temperature Borehole Thermal Energy Storage (BTES) systems with varying operational cycles
Published: 2025-07-12
Subjects: Engineering, Environmental Engineering, Other Mechanical Engineering
High temperature and short-term subsurface heat storage using BTES is a promising option and an emerging technology for increasing the fraction of renewable energy in the heat sector and supplying stored heat at high and directly usable temperatures. Investigation of thermal interactions of multiple BHEs employed for high-temperature cyclic storage operations is required to understand the system [...]
Ancient DNA and lipid biomarkers quantify the climate sensitivity of highland shrubification in Iceland
Published: 2025-07-11
Subjects: Physical Sciences and Mathematics
Future changes in high latitude shrubification are expected to lead to changes in ecosystem structure and positive climate feedbacks, but the rates and elevational range of shrubification are still poorly constrained. Using a sediment record from a small lake in Iceland’s eastern highlands (422 m asl), we merge a sedimentary ancient DNA (sedaDNA) record of Betula with mean summer lake temperature [...]
Integrated Disaster Nursing Response for Public Healthcare Settings in Pakistan: A Sequential Mixed Method Approach Study Protocol
Published: 2025-07-11
Subjects: Public Health
Abstract Background Natural disasters such as floods, earthquakes, and hurricanes pose significant threats to human lives and infrastructure, particularly in low-lying regions of Pakistan. Among the most vulnerable areas are Sanghar and Dadu in the Sindh province, which experience recurrent flooding. These disasters often overwhelm healthcare systems and underscore the urgent need for adequately [...]
Towards HydroLLM: Building a Domain-Specific Language Model for Hydrology
Published: 2025-07-11
Subjects: Engineering
As large language models (LLMs) continue to expand, their effective adaptation to specialized fields remains a critical challenge. This work presents an initial step toward the development of HydroLLM, a domain-specific LLM for hydrology. We construct a dataset of approximately 8,800 hydrology-focused question–answer pairs, each with a supporting context passage drawn from textbooks and [...]
3D insights into the structure and behaviour of Icelandic crystal mushes from gabbroic nodules
Published: 2025-07-11
Subjects: Physical Sciences and Mathematics
Crystal mushes are porous yet cohesive frameworks of crystals interspersed with interstitial melts that form the plumbing systems beneath many active volcanoes. Gabbroic nodules from Gígöldur, central Iceland, provide a unique window into the structure and degassing behaviour of mushy magma reservoirs - localised crystal mush domains beneath Icelandic volcanoes. These plagioclase-rich nodules [...]
Remote Sensing-Based Geospatial Analysis of Channel Migration Patterns in the Lower Shire Valley of the Shire River, Chikwawa District, Malawi
Published: 2025-07-11
Subjects: Engineering
This study examines the spatiotemporal dynamics of fluvial geomorphology along the Shire River floodplain in Malawi from 1975 to 2023, with emphasis on channel migration, width variation, sinuosity, meander curvature, and sediment budget changes. Utilizing multi-temporal satellite imagery and geospatial analysis, morphometric indicators were quantified across 41 cross-sectional zones over four [...]
Domain-Specific Embedding Models for Hydrology and Environmental Sciences: Enhancing Semantic Retrieval and Question Answering in RAG Pipelines
Published: 2025-07-11
Subjects: Education, Engineering
Large Language Models (LLMs) have shown strong performance across natural language processing tasks, yet their general-purpose embeddings often fall short in domains with specialized terminology and complex syntax, such as hydrology and environmental science. This study introduces HydroEmbed, a suite of open-source sentence embedding models fine-tuned for four QA formats: multiple-choice (MCQ), [...]
Regional Responses to Oceanic Variability Constrain Global Drought Synchrony
Published: 2025-07-11
Subjects: Civil and Environmental Engineering, Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology
Synchronized droughts threaten global food security, with concerns about increased frequency and duration under climate change. However, their long-term evolution and physical limits remain unknown. We analyze 61 drought networks over 120 years (1901–2020) of scPDSI data, employing a suite of network synchronization measures and empirical orthogonal functions to unravel the physical drivers and [...]
Mapping Europe's Natural Hydrogen Potential: A Continental-Scale Geological Prospectivity Assessment
Published: 2025-07-10
Subjects: Earth Sciences
Natural hydrogen, generated by a range of geological processes in the Earth's crust, is emerging as a promising carbon-neutral energy source. However, systematic large-scale assessments of its subsurface occurrence remain limited. This study presents the first continental-scale prospectivity map of natural hydrogen in Europe, integrating geological indicators of hydrogen generation, reservoir [...]