Preprints
There are 6319 Preprints listed.
Numerical calculation of coastal trapped wave modes
Published: 2025-11-25
Subjects: Physical Sciences and Mathematics
A numerical method is developed to calculate coastal trapped wave (CTW) modes in the low-frequency limit ω ≪ f. The modes are solutions to a 2-dimensional eigenvalue problem. Useful properties like orthogonality are derived from the bilinear form associated with the operator of the eigenvalue problem. Our formulation uses the z coordinates and the CTW equation is discretized with a [...]
Assessing pluvial flood hazard potential using multi-criteria decision making and iterative ensemble smoothing in New York City, Long Island, and Long Island Sound watersheds
Published: 2025-11-25
Subjects: Hydrology
Exposure to pluvial floods poses significant hazards, and predicting flood locations can be challenging. We developed a metric that quantifies relative flood hazard across Long Island, New York and the watersheds surrounding Long Island Sound. Based on surface topography, land surface characteristics, and historical weather patterns, we identified seven factors with readily available data that [...]
Weathering Trends Unveil K-Metasomatism in Bundelkhand Granitoids: Resolving the Pink–Grey Granitoid Paradox
Published: 2025-11-25
Subjects: Earth Sciences
The petrogenetic puzzle of pink coloration of granitoid rocks is rooted on the debate between primary magmatic versus metasomatic origin of K-feldspar, which, in turn, has persisted due to difficulties in distinguishing these processes through conventional petrographic methods. This study introduces a novel approach using chemical weathering patterns in ACNK ternary diagrams (Al2O3, CaO + Na2O, [...]
Nernstian stability of the Eh–O2 relationship reveals redox structural shifts
Published: 2025-11-23
Subjects: Biogeochemistry
Oxidation-reduction potential (Eh) offers a compact descriptor of aquatic redox status, yet its interpretation is obscured by the many co-occurring electron-transfer reactions that determine it. We tested the hypothesis that the persistence of a linear, Nernstian relationship between Eh and ln[O2] reflects the robustness of the underlying redox structure. Using 18 months of depth profiles and [...]
Barrier vulnerability following outwash: A balance of overwash and dune gap recovery
Published: 2025-11-23
Subjects: Engineering, Physical Sciences and Mathematics
Existing barrier evolution models only simulate storm impacts from landward-driven flows (overwash), neglecting the impacts of seaward-directed flows (outwash). Here, we modify an existing model to incorporate outwash processes. We find that outwash enhances barrier vulnerability (the tendency to drown) over decadal timescales by scarring the island interior, creating lower, narrower landforms. [...]
MiniSat: Prototype for Geological and Environmental Monitoring Using Low-Cost Embedded Systems with RF Communication
Published: 2025-11-22
Subjects: Engineering
This review paper presents a concise analysis of Minisat-based geological monitoring systems that combine low-cost embedded platforms with RF communication technologies. It highlights recent advances in miniaturized satellites and compact sensor nodes that enable affordable, continuous environmental monitoring. The paper reviews key components including embedded electronics, sensor integration, [...]
The Impact of GIA Corrections on Gravimetric Basin-Scale Ocean Mass Budgets
Published: 2025-11-22
Subjects: Climate, Geophysics and Seismology
Closing the sea-level budget is crucial for validating our understanding of climate change and sea-level rise. Satellite gravimetry (Gravity Recovery and Climate Experiment, GRACE) and altimetry are primary tools for measuring the ocean mass. Still, both datasets must be corrected for glacial isostatic adjustment (GIA), the ongoing viscoelastic response of the Earth to past deglaciation. [...]
Translating national climate policies to resilience actions at the subnational level in low resource settings: Lessons from Ghana’s health systems.
Published: 2025-11-22
Subjects: Public Health
According to the WHO 2021 Health and Climate Change Global Survey Report, most countries’ climate change and health plans are witnessing low to moderate implementation due to (among other reasons) insufficient funding, evidence, research, and multisectoral collaboration. In Ghana, the national climate change agenda has, for over a decade, consistently prioritized its health systems, but progress [...]
New insights into the cooling of the oceanic lithosphere from surface-wave tomographic inferences
Published: 2025-11-22
Subjects: Physical Sciences and Mathematics
How oceanic plates cool and thicken with age remains a subject of debate, with several thermal models supported by apparently contradictory data. Combining a novel imaging technique that balances resolution and uncertainty with finite-frequency surface-wave measurements, we build tomographic model SS3DPacific to revisit the cooling style of the oceanic lithosphere beneath the Pacific ocean. [...]
Model of Cortical Mosaics (MMC): An Auto-Organized Evolutionary Trajectory from the Primitive Crust to Proto-Plates
Published: 2025-11-22
Subjects: Geology, Geophysics and Seismology, Tectonics and Structure
The structure and dynamics of Earth’s crust during the Hadean–Eoarchean remain one of the central challenges in geodynamics. Traditional models describe early states in terms of discrete regimes—stagnant lid, heat-pipe, episodic tectonics, or proto-plates—but none provides a continuous framework linking primitive fragmentation with the late emergence of plate tectonics. This work proposes the [...]
Arsenic immobilisation analysis at iron-manganese mineral phases with sustainable bioaugmentation
Published: 2025-11-21
Subjects: Chemistry, Environmental Sciences, Microbiology, Research Methods in Life Sciences
Alternate wetting and drying (AWD) cycles significantly influence arsenic (As) mobility and sequestration in contaminated soils, yet the mechanisms underlying As immobilisation at iron-manganese (Fe-Mn) mineral interfaces remain poorly characterised. This study investigates As entrapment within Fe-Mn mineral layers and evaluates long-term immobilisation stability when bioaugmented with Bacillus [...]
Simulation of the Impacts of Spring Diversions on Streamflow in the Strawberry Creek Watershed, San Bernardino County, California, Using an Integrated Hydrological Model
Published: 2025-11-21
Subjects: Physical Sciences and Mathematics
The Strawberry Creek watershed, situated in the San Bernardino Mountains of southern California, features a group of natural springs known as Arrowhead Springs that have been augmented with diversions in the form of sub-horizontal borings and tunnels. Understanding the impact of these structures on streamflow through groundwater capture is crucial for managing surface-water resources in this [...]
Wetter Winters, Drier Summers: Quantifying the change in hydrological response around the Puget Sound area using the wflow_sbm hydrological model and CMIP6 projections
Published: 2025-11-21
Subjects: Earth Sciences, Hydrology, Physical Sciences and Mathematics
Climate change is expected to impact hydrological regimes worldwide, including the Pacific Northwest of the United States. This study investigates how climate change will affect river discharge in the Puget Sound region of the State of Washington, with a focus on King and Pierce Counties. We simulated river discharge under historical and future conditions using the physically based, spatially [...]
Coral reef commitments are largely absent from national biodiversity and climate frameworks
Published: 2025-11-21
Subjects: Biodiversity, Climate, Environmental Health and Protection, Environmental Indicators and Impact Assessment, Environmental Monitoring, Environmental Sciences, Marine Biology, Natural Resource Economics, Natural Resources and Conservation, Natural Resources Management and Policy, Oceanography, Other Oceanography and Atmospheric Sciences and Meteorology, Sustainability
Global agreements under the Convention on Biological Diversity (CBD) and the UN Framework Convention on Climate Change (UNFCCC) call for integrated action on biodiversity loss and climate change. Yet national implementation remains poorly understood, even for ecosystems highly vulnerable to warming, such as tropical coral reefs. Bleaching-level heat stress has affected over 85% of global reefs [...]
Morphological Signatures of Planetary Fusion: A Unifying Framework for Earth's Deep Heterogeneities
Published: 2025-11-21
Subjects: Physical Sciences and Mathematics
ABSTRACT Studies show that the theoretical feasibility, described in the literature, of gravitational interactions between celestial bodies under certain conditions may result in collisions with complete fusion of masses is acknowledged. Accordingly, the objective is to characterize their long-term structural and biological consequences. This study presents a testable conceptual model in which [...]