Preprints
There are 8014 Preprints listed.
Efficient Uncertainty Quantification for Marine CSEM via Swi-DREI: A Physics-Driven Deep Reparameterization Ensemble Approach with Implicit Regularization
Published: 2026-11-03
Subjects: Physical Sciences and Mathematics
Marine controlled-source electromagnetic (MCSEM) method serves as a pivotal geophysical tool for characterizing deep-sea hydrocarbon reservoirs or gas hydrates. However, restricted by the exponential decay of EM fields in conductive media and the spatial incompleteness of data acquisition systems, the inverse problem faces challenges of severe non-linearity and non-uniqueness. This study develops [...]
An unprecedented Mediterranean tropical cyclogenesis attempt above extreme sea surface temperatures?
Published: 2026-11-03
Subjects: Atmospheric Sciences, Climate, Meteorology, Oceanography and Atmospheric Sciences and Meteorology
On 3-4 October 2026, a strong and organized mesoscale convective system (MCS) developed over the Balearic Sea in the Western Mediterranean, and produced torrential rainfall in the Barcelona area, with up to 248 mm at Granollers (230 mm in 8 hours; 65 mm in an hour). The event occurred without discernible large-scale forcing from an upper-level cut-off low or trough, while western Mediterranean [...]
Predictive modeling of microbial biomineralization across scales
Published: 2026-11-03
Subjects: Biogeochemistry, Earth Sciences, Environmental Microbiology and Microbial Ecology Life Sciences, Life Sciences, Microbiology, Physical Sciences and Mathematics
Microorganisms influence mineral formation and transformation in natural and engineered environments, with consequences for element cycling, contaminant mobility, and mineral records. Predicting these processes remains difficult because microbial activity, local aqueous chemistry, interfacial reactions, and mineral formation operate across different spatial and temporal scales. Here, we review [...]
One island, three countries: aquaculture ponds explain the cross-border gap in mangrove loss on Borneo
Published: 2026-11-02
Subjects: Environmental Indicators and Impact Assessment, Environmental Monitoring, Natural Resources and Conservation, Natural Resources Management and Policy, Remote Sensing, Terrestrial and Aquatic Ecology
Borneo's mangroves share one coastline, climate and sediment regime, yet they are governed by three countries. Using the annual Global Mangrove Watch v4.1 series and open data, this study asks why mangrove in Indonesian Kalimantan is lost faster than in Malaysian Borneo and Brunei, and tests three explanations: protected-area performance, conversion pathways and El Niño sea-level fall. Between [...]
No Universal Urban Form Heat Relationship: Contrasting Thermal Controls in African Cities
Published: 2026-11-02
Subjects: Geographic Information Sciences, Human Geography, Physical and Environmental Geography, Remote Sensing, Spatial Science
Rapid urbanization and climate change have intensified urban heat island effects. Tropical African cities face particularly high heat vulnerability, yet they remain underrepresented in urban thermal research. Existing research often assumes universal morphology temperature relationships, lacking cross city comparative evidence and spatially rigorous nonlinear attribution in African contexts. This [...]
Residue alkalinity limits microbial leaching of rare earth elements from industrial wastes
Published: 2026-11-02
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Physical Sciences and Mathematics, Sustainability
Microorganisms that make acids can recover rare earth elements from industrial residues such as red mud, coal fly ash, phosphogypsum and electronic waste. Most published studies test one organism on one residue, so their results are hard to transfer. Here we compiled 17 bioleaching studies, covering 10 residues, 5 groups of organisms and 217 runs. We described them all with one physical model, [...]
How climate-related events become climate governance problems: climate change attribution divergence as an interpretive mechanism
Published: 2026-11-01
Subjects: Social and Behavioral Sciences
Climate-related events are often viewed as potential catalysts for policy learning and changes in climate governance. Floods, droughts, heatwaves, wildfires, and other environmental changes can expose vulnerabilities in infrastructure, land-use planning, and emergency preparedness, drawing attention to the need to reassess existing practices. However, events can be associated with different [...]
Lithologic Period Predicts Yttrium Enrichment in Western United States Stream Sediments
Published: 2026-11-01
Subjects: Applied Statistics, Design of Experiments and Sample Surveys, Earth Sciences, Geochemistry, Geology, Physical Sciences and Mathematics, Statistical Methodology, Statistical Models, Statistics and Probability
Screening ground for heavy rare earth prospecting potential at regional scale depends upon archived geochemistry, because favorable intrusive terrain in the western U.S. greatly exceeds what any drilling program could evaluate directly. This research examined whether the lithologic period of intrusive igneous terrain can reliably predict acid-leachable yttrium using only the stream sediment [...]
A sixth-century groundwater manual tested against India's well network: plant indicators and depth claims in Varāhamihira's Bṛhatsaṃhitā
Published: 2026-11-01
Subjects: Earth Sciences, Hydrology, Life Sciences, Physical Sciences and Mathematics
The Dakārgala chapter of Varāhamihira's Bṛhatsaṃhitā (sixth century CE) is one of the oldest detailed manuals for finding groundwater. It names trees, often together with anthills, as signs of water and gives the depth at which water will be found. It is often cited as early hydrological knowledge, but its claims have not been tested systematically. We coded the chapter's plant indicators and 48 [...]
Hydro Stack: Automated geospatial processing workflow for Water Security Planning
Published: 2026-11-01
Subjects: Computational Engineering, Environmental Engineering, Geographic Information Sciences, Hydrology, Software Engineering, Water Resource Management
Watershed and micro-watershed delineation underlies a wide range of water security and land management decisions; yet existing global hydrographic products such as HydroSHEDS are static, coarser, and not readily reproducible or adaptable to new regions or scales. We present Hydro Stack, an open-source, end-to-end workflow that automates micro-watershed delineation and hydrological [...]
Station-trained air-quality forecasts without regional emission inventories
Published: 2026-10-31
Subjects: Artificial Intelligence and Robotics, Atmospheric Sciences, Computer Sciences, Environmental Monitoring, Environmental Sciences
Air-quality forecasts rely on regional chemical transport models (CTMs) and emission inventories, which are uncertain in many regions and costly to update. Here we present SOLACE, whose inner forecast is trained on monitoring-station observations alone and evolves gridded concentration fields through explicit transport, layer exchange, sources and sinks. With 140,000 trained parameters and no [...]
Mapping landslide change and volume with repeat airborne LiDAR after the May 2023 Emilia-Romagna event: slope-dependent detection limits and lowered areas
Published: 2026-10-31
Subjects: Environmental Monitoring, Geomorphology, Remote Sensing
Landslide inventories are validated against repeat topography by comparing the ground that changes beyond a detection limit inside mapped polygons with the same fraction on stable ground. Stable ground is gentler than landslides, and LiDAR noise grows with slope. We measure the consequence for the May 2023 Emilia-Romagna event, Italy, with four pairs of 0.5 m airborne LiDAR on 919 river-corridor [...]
The remote reference as an instrumental variable in model space: time-series magnetotelluric inversion with noisy magnetic fields
Published: 2026-10-31
Subjects: Geophysics and Seismology
Noise in the local magnetic field biases magnetotelluric (MT) responses, and a relevant, valid remote magnetic record removes the bias. For an earth model inverted from time series, remote referencing becomes estimating equations: the residual formed with the local field is orthogonal to the sensitivities driven by its projection on the remote field. Their solution, relevance and validity must be [...]
Conditional reliability of gridded rainfall datasets in Nigeria
Published: 2026-10-31
Subjects: Atmospheric Sciences, Climate, Meteorology, Other Oceanography and Atmospheric Sciences and Meteorology
Gridded rainfall datasets support Nigerian research and climate services, but published agreement depends on the rainfall property, release and validation design. This critical narrative review audits 18 Nigerian gauge-reference evaluations and two contextual comparator studies. The core register contains five complete-text, five passage-only and eight abstract-only records. An archived [...]
Threshold Sensitivity and Reference Uncertainty in Sentinel-1 Inundation Mapping: The July 2021 Mahad Flood
Published: 2026-10-30
Subjects: Environmental Monitoring, Geomorphology, Hydrology, Water Resource Management
Synthetic Aperture Radar (SAR) is widely used to map flood inundation under cloud cover, but backscatter-based mapping is sensitive to processing choices, and quantitative evaluation depends on reference data that are often unavailable. This paper examines both issues for the July 2021 flood at Mahad, Maharashtra, India. Three Sentinel-1A VV/VH scenes from one descending orbit, acquired on 10 [...]