Preprints
There are 7782 Preprints listed.
Competing Health Impacts of Smoke from Wildfires, Agricultural Burning, and Prescribed Fires in California
Published: 2026-07-30
Subjects: Environmental Health and Protection, Environmental Public Health, Environmental Sciences
Wildfire smoke is a dominant threat to air quality and public health in North America, but smoke from other fire sources can also affect health during wildfire seasons. In California, smoke from agricultural burning and prescribed fire co-occurs with wildfire smoke, yet the competing health impacts of these sources remain poorly quantified. To investigate these differential impacts, we estimate [...]
Lead contamination in cassava-based food and tubers (Manihot esculenta Crantz) in French Guiana: evidence for soil-to-plant transfer as the primary source
Published: 2026-07-29
Subjects: Environmental Sciences
This study investigates lead (Pb) contamination in cassava in French Guiana, focusing on its sources, accumulation processes, and. Previous studies in the area have shown that cassava-based products could be a source of lead in diets, raising concern about human exposure. The results show that cassava tubers often contain lead concentrations and 72% of the analysed samples (n=81) exceed [...]
Statistical projections of the mean changes in intra-seasonal rainfall characteristics over Zambia from the reference period 1981-2010 to the future 2031-2060.
Published: 2026-07-29
Subjects: Oceanography and Atmospheric Sciences and Meteorology
Zambia's rain-fed agriculture depends less on how much rain falls in a season than on how that rain is distributed within it. This study projects changes in the longest dry spell (consecutive dry days, CDD) and the longest wet spell (consecutive wet days, CWD) over Zambia, together with the number of wet days, rainfall per wet day and seasonal total, for 2031–2060 relative to 1981–2010, using 25 [...]
A community data commons for equitable Earth Science
Published: 2026-07-29
Subjects: Earth Sciences, Environmental Sciences
Earth observation has entered an era of extraordinary data abundance, yet the analysis-ready, well-documented, reproducible datasets that climate, water, agriculture, and disaster research actually require remain scarce. Every research group that repeats the same preprocessing pays a last-mile cost that falls hardest on the institutions and communities least able to afford it. Here we describe [...]
Thermal Resilience During Prolonged Cooling Outages: A Multi-Zone Field Study of Disruption and Recovery in Arizona Apartments
Published: 2026-07-29
Subjects: Engineering, Other Engineering
Increasing frequency and severity of extreme heat events, and growing dependence on air-conditioning systems emphasize the need to evaluate thermal resiliency of buildings during cooling outages. Existing assessments often emphasize isolated metrics or steady state conditions and may not adequately characterize cumulative thermal exposure, thermal buffering, and post outage recovery. This study [...]
Manganese Oxidation States Reveal a Continental-Scale Climate-Driven Redox Gradient in Upland Soils
Published: 2026-07-29
Subjects: Biochemistry, Geochemistry, Soil Science
Soil redox conditions regulate soil organic carbon (SOC) persistence and nutrient availability, yet macroclimatic controls in uplands remain unclear because O2 depletion reflects the interactions of moisture, labile carbon, soil texture, and microbial demand. Here we pair manganese (Mn) oxidation state, an integrative redox proxy, with effective water balance (mean annual precipitation minus [...]
Revisiting Snoke’s (1987) Spectral Expressions: Coefficient Correction and Its Implications for Dynamic Insights
Published: 2026-07-29
Subjects: Geophysics and Seismology
Source parameters such as seismic moment, corner frequency, stress drop, radiated energy, and apparent stress are often derived from the Brune (1970) source spectrum. Building on this, Andrews (1986) formulated analytical relations that link those parameters to spectral integrals of squared velocity and displacement, and Snoke (1987) introduced an approximation that enables their practical [...]
MUONITH v1.0 — A Fast Simulation Tool for Multi-directional Muography Observation Design
Published: 2026-07-29
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
Multi-directional muography is a non-destructive technique for imaging the three-dimensional density structure of large objects such as volcanoes. Recent developments in detector technology—miniaturization, low-power operation, and weight reduction—are rapidly expanding the range of feasible observation sites, and detector deployment by unmanned aerial vehicles (UAVs) is also being studied; in [...]
Sub-pixel Canopy Phenology reveals divergent Spring transition sequences in Tropical Mixed Deciduous Forest
Published: 2026-07-29
Subjects: Biodiversity, Biology, Ecology and Evolutionary Biology, Forest Sciences
Vegetation phenology regulates terrestrial carbon uptake and land–atmosphere interactions, and is commonly inferred from satellite-derived vegetation indices such as the Normalised Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI). However, these observations represent spatially aggregated signals that mask phenological variability among individual tree canopies in [...]
Distributed Acoustic Sensing Recordings of Cryoseismicity Enable Seismic Imaging of Permafrost in Remote Arctic Regions
Published: 2026-07-29
Subjects: Geophysics and Seismology, Geotechnical Engineering, Glaciology
Permafrost can be highly heterogeneous, and variability in its subsurface structure under climate warming remains poorly understood despite the critical role of permafrost in Arctic hydrology, ecosystems, and infrastructure stability. Distributed acoustic sensing (DAS) provides a long-term method for dense seismic array monitoring in remote regions with passively recorded seismic activities. We [...]
Thin Ice DEM Model Based on Smoothed Elements: A 2.5-Dimensional DEM Approach for Ice–Structure Interaction Simulation
Published: 2026-07-29
Subjects: Physical Sciences and Mathematics
The user wants just the updated abstract in plain text format, with α removed.` We present a novel 2.5-dimensional Discrete Element Method (DEM) model, termed the Thin Ice Model (TIM), for efficient simulation of ice-structure interactions in broken and unbroken sea ice fields. The model is based on Voronoi tessellation of a single-layer ice sheet, where the ratio of element area to thickness [...]
SCI-VIS: Lightweight Visibility Tagging for Coastal Camera Monitoring
Published: 2026-07-29
Subjects: Atmospheric Sciences, Environmental Monitoring, Oceanography, Remote Sensing
Observations and measurements made from coastal cameras are conditional on the frame being interpretable. Sea fog, glare, rain and condensation on the housing, haze and low light each degrade the imagery, and the shoreline positions, wave measurements and counts derived from a degraded frame are corrupted or spurious. This paper evaluates a per-frame visibility classifier, based on a compact [...]
Assessing the protective role of active agriculture in wildfire exposure in a Mediterranean region
Published: 2026-07-29
Subjects: Geography
Global change and rural abandonment are restructuring Mediterranean fire regimes, as landscapes once characterized by heterogeneous agricultural mosaics are progressively replaced by homogenized, drought-limited fuel complexes. This transformation increases the likelihood of high-intensity wildfire events and their associated impacts. This study applied a stochastic fire-spread modeling framework [...]
A Blueprint for Modern Floodplain Management: System Requirements and Architecture for AI-Ready Platforms
Published: 2026-07-29
Subjects: Artificial Intelligence and Robotics, Civil and Environmental Engineering, Computer Sciences, Engineering, Hydraulic Engineering, Physical Sciences and Mathematics, Water Resource Management
Floodplain managers play a critical role in mitigating flood risks and ensuring compliance with federal, state, and local regulations. Their daily work often depends on a patchwork of standalone tools, manual processes, and legacy systems that have evolved over time to meet regulatory and community needs. To establish a foundation for next-generation technological solutions, we synthesized [...]
Stress-Conditioned Lightweight Flash-Drought Detection in the US Corn Belt Using MODIS NDVI and ERA5-Land
Published: 2026-07-29
Subjects: Hydrology, Meteorology
Flash-drought monitoring by classical indices averages predictive signal across calm and stressed years, blunting the signal exactly where it matters. We show empirically that the coupling between precipitation, soil moisture, vapor pressure deficit (VPD), and NDVI is stress-conditional: the hydrological pathway is visible when vegetation is already under stress (Spearman rho of about 0.18 for [...]