Preprints
There are 8003 Preprints listed.
Magnetic dual-layer equivalent sources on the sphere
Published: 2026-03-10
Subjects: Geophysics and Seismology
The equivalent source method is widely used for processing and interpolating magnetic data, particularly in airborne surveys. However, implementations based on Cartesian coordinates present limitations at regional and global scales, where Earth curvature introduces geometric inconsistencies that affect data integration and modeling accuracy. To address this problem, this study proposes an [...]
Active hazardous slow faults drive drainage evolution in the Atacama Desert
Published: 2026-10-14
Subjects: Earth Sciences, Geology, Geomorphology, Hydrology, Tectonics and Structure
The Atacama Desert of the Central Andean forearc is the driest non-polar region on Earth, where extremely low erosion rates preserve geomorphic markers over Myr timescales. Between 19°S and 20°S, subtle Quaternary east-vergent reverse faults deform the west-sloping landscape and disrupt drainage development. This setting provides a unique opportunity to investigate fault evolution, uplift [...]
Reconstruction of ancestral drainage patterns in an internally draining region, Fars Province, Iran
Published: 2026-10-14
Subjects: Earth Sciences, Physical Sciences and Mathematics
Google Earth imagery is used here in conjunction with a Geographic Information System to identify transverse drainages and recreate paleodrainage in an internally draining region in Iran. At least thirty-five water gaps and thirty-four wind gaps are shown to exist in the region, as well as evidence for an integrated paleodrainage that originated north of the internally draining region and [...]
Mapping Ghana's Vanishing Tree Cover: Two Decades of Regional Loss and Shifting Deforestation Hotspots (2001-2024)
Published: 2026-10-24
Subjects: Physical Sciences and Mathematics
Ghana has lost a great deal of tree cover since 2000, but it is less clear where the loss is greatest and whether those places have changed over time. This study used satellite records of tree cover loss from 2001 to 2024 and counted the loss in each of Ghana's 16 regions. Only areas that had at least 30% tree canopy in 2000 were included. Out of about 6.97 million hectares of tree cover in 2000, [...]
Relationship between Meteorological Parameters and Temporal Variations of Microseismic Processes at the Belarusian Antarctic Research Station
Published: 2026-10-23
Subjects: Geophysics and Seismology, Meteorology, Oceanography
This study involved an analysis of seismic data acquired in the surrounding area of the Belarusian Antarctic research station “Mount Vechernyaya” in February, 2023 to identify a possible relationship between the seismic noises and local meteorological parameters. Probability density functions of power spectral densities histograms were constructed using the ObsPy framework based on the source [...]
Cyclone--Anticyclone Asymmetry Organizes Local Energy Transfers during Mixed Layer Instability
Published: 2026-11-06
Subjects: Physical Sciences and Mathematics
Mixed layer instability (MLI) generates submesoscale fronts, filaments, and eddies, yet how cyclone--anticyclone asymmetry shapes the spatial distribution of energy transfers remains unclear. Ageostrophic convergence during frontal sharpening amplifies cyclonic vorticity, first producing a positively skewed vorticity distribution and later a cyclonically biased flow. We analyze a freely evolving [...]
Deteriorating climate conditions for Australian wheat production
Published: 2026-10-14
Subjects: Climate
Wheat yields are highly sensitive to climate extremes, but previous studies risk underestimating their influence due to a reliance on highly aggregated agricultural data. Here we combine nationwide farm-level agricultural data with machine learning to identify the key drivers of Australian wheat yield and assess how climate conditions for wheat production have changed over recent decades. We find [...]
A survey of transverse drainages in the Susquehanna River basin, Pennsylvania
Published: 2026-10-14
Subjects: Earth Sciences, Physical Sciences and Mathematics
While large-scale transverse drainages (TDs) such as those of the Susquehanna River above Harrisburg, PA, have been recognized since the nineteenth century, no systematic surveys have been done of TDs since Ver Steeg (1930). A topographic and statistical analysis of TDs in the Susquehanna River basin using Google Earth® and associated overlays identified 653 TDs in the study area, 95% of which [...]
A retrodictive theory of the origin of the Moon: a secondary circumterrestrial disk redistributed by the retrograde flyby of a rocky planet
Published: 2026-10-21
Subjects: Astrophysics and Astronomy, Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics, Planetary Geochemistry, Planetary Geology, Planetary Sciences, The Sun and the Solar System
The Moon is a datum, and the question is retrodictive: which physical pathways lead to it without a giant impact? The pathway examined starts from a young, hot proto-Earth, soft but never liquid, flattened and inflated by a 6 h rotation, surrounded by a disk of material that has not yet formed a satellite. A second rocky planet, planet B, passes close to the Earth against its rotation, without [...]
Robust Regional Predictability of North Atlantic Tropical Cyclones on Seasonal Timescale
Published: 2026-10-22
Subjects: Physical Sciences and Mathematics
Tropical cyclones (TCs) are intermittent extreme weather events, yet their seasonal occurrence can be constrained by slowly varying climate variability and regional predictability remains poorly understood. Using 44 years of May-initialized ensemble hindcasts, we show robust seasonal predictability of North Atlantic TC track density across two prediction systems with contrasting resolutions: [...]
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 [...]
Modelling the connections between internally and externally drained basins using GIS, Google Earth©, and remote sensing
Published: 2026-10-14
Subjects: Earth Sciences, Physical Sciences and Mathematics
The development of internal drainage is intimately tied to the tectonic and climatic history of an area, but research into the exact causes and processes of internal drainage is constrained by the ability to accurately delineate both internally and externally draining watersheds. Until recently, existing global catalogs of internally drained regions were either hand-drawn or based upon digital [...]
Species distribution modelling of three Aacia species in the Negev Desert: predicting future range shifts and identifying climatic drivers
Published: 2026-10-22
Subjects: Ecology and Evolutionary Biology
Climate change is intensifying aridity across desert regions, causing ecological stress and threatening the stability of arid ecosystems. As keystone species are central to ecosystem functioning, predicting shifts in their distribution can provide important insight into broader ecological change. In the Negev Desert, Acacia populations have experienced widespread declines attributed to reduced [...]
Lixa v0.1.2: an open-source, image-informed framework for closed-loop design of leaching processes for domestic critical-mineral recovery, from the pore to the plant scale
Published: 2026-10-14
Subjects: Earth Sciences, Engineering, Geochemistry, Hydrology, Mining Engineering, Physical Sciences and Mathematics
Leaching takes a metal out of a rock and into a solution. In the United States, rare earth elements, lithium and scandium occur mostly in rocks where the metal is thinly spread through a porous matrix: weathered clays, coal ash, lithium claystones and bauxite residue. For such rocks the leaching recipe (reagent, concentration, temperature, particle size, liquid-to-solid ratio and contact time) [...]
Environmental sustainability studies in US hospitals from 2015-2025: A scoping review of geographic and clinical trends
Published: 2026-10-22
Subjects: Environmental Sciences
The healthcare sector is responsible for an estimated 8% of the United States’(US) total greenhouse gas emissions, and the US is one of the largest global carbon emitters, responsible for an estimated quarter of all global healthcare emissions. The primary objectives of this scoping review are to understand geographic, medical specialty, pre/post-pandemic publishing trends, and major research [...]