Preprints
Filtering by Subject: Physical Sciences and Mathematics
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 [...]
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 [...]
A systematic review of microplastic pollution in rivers across Asia
Published: 2025-11-20
Subjects: Physical Sciences and Mathematics
Microplastics are widely distributed in the aquatic ecosystem globally. They pose potential risks and harm to the ecosystem and human health. Contamination of river environments by microplastics has raised concern due to its negative effect on the aquatic system. Asian rivers serve the world’s most populous continent, encompassing many developing countries experiencing rapid development and [...]
Thermal Power and Climate Change: A Data-Driven Analysis of Cause and Effect, 1800-2100
Published: 2025-11-20
Subjects: Education, Engineering, Life Sciences, Physical Sciences and Mathematics, Social and Behavioral Sciences
Since 2020, global politics have shifted sharply to the right—nowhere more visibly than in Europe and the United States. By 2024, this rightward turn in the U.S. culminated in open climate-change denial, the defunding of clean-energy initiatives, and a widespread rejection of scientific evidence. Major domestic and international institutions—NOAA, NASA, the U.S. Weather Bureau, EPA, USDA, FDA, [...]
The slip distributions of the 1952 and 2025 Kamchatka earthquakes from tsunami waveforms recorded around the Pacific Ocean
Published: 2025-11-18
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
The July 2025 Kamchatka earthquake (Mw 8.8) generated Pacific-wide tsunamis. Inversion of 40 DART bottom pressure records around the Pacific Ocean revealed a large (~ 9 m) slip at 200 – 400 km southwest of the epicenter, closely matching the USGS finite fault model based on teleseismic data. In this region, a similarly large megathrust earthquake (M ~ 9) occurred in 1952. The tsunami waveforms [...]
Comparative Evaluation of Threshold Pressure Measurement Techniques in Faulted and Shale Formations
Published: 2025-11-16
Subjects: Physical Sciences and Mathematics
Reliable estimation of capillary threshold pressure is essential for evaluating the sealing capacity of subsurface flow barriers, which has important applications in fluid storage. This study compares the results of capillary threshold pressure measurements obtained from four experimental techniques: (i) gas breakthrough, (ii) mercury injection capillary pressure (MICP), (iii) Porosimetry under [...]
Standing wave-induced tidal shear in a submarine canyon in the Rockall Trough
Published: 2025-11-15
Subjects: Physical Sciences and Mathematics
Mixing in the ocean abyss sustains the deepest branches of the global overturning circulation, yet the processes that drive deep-ocean mixing remain poorly understood. Recent field measurements in a deep submarine canyon of the Rockall Trough have revealed that intense mixing occurs during strong, vertical shear-generated overturns exceeding 200 meters. These overturning events last only a few [...]
Temperature insensitive viscous deformation limits megathrust seismogenesis
Published: 2025-11-14
Subjects: Earth Sciences, Physical Sciences and Mathematics, Physics
Three models have been proposed to explain the downdip limit of the subduction seismogenic zone. The first is a temperature-controlled transition in rate-and-state frictional properties between 350–510°C, which inhibits earthquake nucleation. The second places the limit at the frictional and viscous failure envelope intersection. The third combines thermal and lithological controls, where 'warm' [...]
Palynofacies And Paleoenvironmental Studies of TDA-1 Well, Niger Delta Basin, Nigeria
Published: 2025-11-14
Subjects: Earth Sciences, Physical Sciences and Mathematics
The palynofacies and paleoenvironmental study of TDA-1 well, Niger Delta Basin, Nigeria between intervals of 6160 to 14470 feet (1878 to 4410 meter). The Niger Delta Basin is a crucial geological formation that has significant hydrocarbon reserves and supports diverse ecosystems where three main formations in ascending order are formed including the Paleocene Akata Formation, Eocene Agbada [...]
Unusual Drilling-Induced Stress Features - What To Do With You?
Published: 2025-11-14
Subjects: Physical Sciences and Mathematics
Drilling-induced features identified from borehole image logs provide direct constraints on in-situ stress orientations and magnitudes. Classic features such as drilling-induced tensile fractures and borehole breakouts have been extensively documented since the 1980s, predominantly in sedimentary rocks within hydrocarbon reservoirs. More recently, petal-centreline fractures have also been [...]
Developing an Open-access Telegram Bot for Automated, estimation and IA-based interpreted of OpenQuake Ground-Motion intensity measures
Published: 2025-11-13
Subjects: Education, Engineering, Life Sciences, Physical Sciences and Mathematics
The prediction of Intensity Measures (IMs) using Ground-Motion Models (GMMs) is a fundamental component of seismic hazard assessment. However, the best estimation of IMs traditionally requires specialised searchers, programming expertise, and the manual sourcing of regression coefficients. This complexity creates a significant barrier to rapid, scenario-based analysis for engineers, researchers, [...]
Rheological control on earthquake source kinematics and dynamics at the Hengill geothermal field
Published: 2025-11-06
Subjects: Physical Sciences and Mathematics
We analyze seismic source parameters of the induced earthquakes at the Hengill (Iceland) between 2018 and 202 to investigate rupture processes in a complex volcanic–geothermal setting. Our analysis reveals a source scaling relation that deviates from the commonly assumed M0 ∝ fc^-3. By combining stress tensor orientation, lithostatic and hydrostatic pressure, and frictional strength estimates, we [...]
Thoughts on prognostically modeling an eddying double-gyre ensemble mean
Published: 2025-11-05
Subjects: Physical Sciences and Mathematics
We address the question of separating the ocean’s deterministic response to time-dependent forcing from its intrinsic chaotic variability. Because the forcing is neither stationary nor periodic and spatial homogeneity is precluded by both the forcing pattern and boundary conditions, statistical analysis must rely on ensemble averaging. Here, we define this as the arithmetic mean over realizations [...]
Biases due to widespread use of low-cost sensors for urban heat stress assessments
Published: 2025-11-05
Subjects: Physical Sciences and Mathematics
Urban heat stress is an area of critical research interest due to its relevance for public health and policy. Given the lack of operational-grade weather stations within cities, different types of low-cost sensors have been used to assess urban heat stress. However, these sensors are traditionally not designed for capturing fine scale differences in temperature and humidity (i.e., the main [...]