Preprints
There are 8001 Preprints listed.
GeoAgent: An Agent-Based QGIS Plugin for Natural-Language-Driven Geospatial Analysis with Multi-Backend Large Language Model Support
Published: 2026-10-01
Subjects: Computer and Systems Architecture, Geographic Information Sciences, Other Earth Sciences, Spatial Science
Geospatial analysis is essential across the earth and environmental sciences, yet conventional geographic information systems (GIS) rely on a procedure-oriented paradigm that demands substantial operational expertise. We present GeoAgent, an open-source QGIS plugin that enables goal-driven geospatial workflows through natural language conversation powered by large language models (LLMs). GeoAgent [...]
Foraminiferal Analysis of Holocene Sea Level Rise within the Trinity River Incised Paleo-Valley, Offshore Galveston Bay, Texas
Published: 2021-10-06
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Paleontology
Sea-level is expected to continue to rise in the next century, and as society prepares to deal with this hazard it is critically important to understand how coastal systems will respond, especially in regions with rapid rates of coastal erosion and relative sea-level rise like the Gulf of Mexico Texas coast. Tide gauge records in Galveston Bay, Texas, indicate that local sea level rise rates are [...]
Bad science and good intentions prevent effective climate action
Published: 2023-11-10
Subjects: Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Although the 2015 Paris Agreement climate targets seem certain to be missed, only a few experts are questioning the adequacy of the current approach to limiting climate change and suggesting that additional approaches are needed to avoid unacceptable catastrophes. This article posits that selective science communication and unrealistically optimistic assumptions are obscuring the reality that [...]
Mineral-specific ligand and redox dynamics of adsorbed platinum: Pathway-dependent mobility during terrestrial weathering
Published: 2026-09-17
Subjects: Geochemistry
Weathering zones developed above ultramafic rocks, such as oxidized ores, soils, and laterites, concentrate the critical mineral platinum and represent a promising future resource. Prior work has documented Pt accumulation in these zones, including its common association with iron oxides. However, the fundamental mechanisms that control Pt retention versus mobilization during weathering are not [...]
Formation, redistribution, and stabilization of framboidal pyrite in shallowly buried deep-sea sediments
Published: 2026-09-10
Subjects: Sedimentology
Framboidal pyrite is widespread in anoxic marine sediments, but the processes that control the redistribution and preservation of pyrite aggregates after their formation remain poorly constrained. Here, I examine the microfabric and spatial organization of framboidal pyrite in shallowly buried deep-sea sediments from the Sagami Trough and the Sea of Japan using complementary freeze-dried and [...]
Resonant Platform Response and Vertical Velocity Biases in ADCP Measurements from Quasi-Lagrangian Platforms
Published: 2026-02-13
Subjects: Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
Autonomous surface and subsurface platforms equipped with acoustic Doppler current profilers (ADCPs) are increasingly used to observe ocean velocities, but in the presence of surface waves these measurements can be biased by orbital motion and wave-induced platform tilting. Previous work quantified such biases for idealized platform responses that were in phase with the wave forcing. Here we [...]
Evidence that seismic anisotropy captures upstream palaeo ice fabric: Implications on present day deformation at Whillans Ice Stream, Antarctica
Published: 2023-11-16
Subjects: Earth Sciences, Geophysics and Seismology, Glaciology, Physical Sciences and Mathematics
Understanding deformation and slip at ice streams, which are responsible for 90% of Antarctic ice loss, is vital for accurately modelling large-scale ice flow. Ice crystal orientation fabric (COF) has a first-order effect on ice stream deformation. For the first time, we use shear-wave splitting (SWS) measurements of basal icequakes at Whillans Ice Stream (WIS), Antarctica, to determine a [...]
GEE-PICX: Generating cloud-free Sentinel-2 and Landsat image composites and spectral indices for custom areas and time frames - a Google Earth Engine web application
Published: 2023-12-11
Subjects: Environmental Sciences
Earth observation satellites are collecting vast amounts of free and openly accessible data with immense potential to support environmental, economic, and social fields. As the availability of remotely sensed data increases, so do the methods for accessing and processing it. Many solutions exist for creating cloud-free image composites from often cloudy satellite data, but these typically require [...]
Bad science and good intentions prevent effective climate action
Published: 2024-02-17
Subjects: Climate, Oceanography and Atmospheric Sciences and Meteorology, Other Oceanography and Atmospheric Sciences and Meteorology, Terrestrial and Aquatic Ecology
Although the 2015 Paris Agreement climate targets seem certain to be missed, only a few experts are questioning the adequacy of the current approach to limiting climate change and suggesting that additional approaches are needed to avoid unacceptable catastrophes. This article posits that selective science communication and unrealistically optimistic assumptions are obscuring the reality that [...]
Revisiting the felsőbányaite-basaluminite question : nomenclatural synonymy and unresolved structural issues
Published: 2026-09-09
Subjects: Earth Sciences, Geochemistry, Mineral Physics, Soil Science
Felsőbányaite (1853) and basaluminite (1948) share the formula Al4(SO4)(OH)10·4H2O, and were shown to be crystallographically identical in 1997, leading the IMA to discredit basaluminite in 2006 in favor of the older name. This nomenclatural choice is not an issue. Instead, this opinion article explores a more focused contemporary question: is the poorly crystalline material that geochemists [...]
CHIRICAHUA Field Report 2021-2023 - Sky Islands and the Desert Southwest An Independent Ecological Study
Published: 2024-02-22
Subjects: Desert Ecology, Earth Sciences, Ecology and Evolutionary Biology, Environmental Sciences
This Chiricahua Field Report is a combination of collected data and field observations that began in November 2021 and continued on until May 2023. The Report is about ecology and connections of life. It contains information on 400+ trees in 10 diverse ecosystems including the Madrean Sky Islands and the Riparian zones of ancient sea valleys in SE Arizona. Recent season changes, warming, fires, [...]
Unraveling the crop yield response under ... through the deployment of a drought index
Published: 2024-07-04
Subjects: Engineering
Extensive research has explored the impact of shading on vegetation growth and crop yield (CY) under agrivoltaic (APV) systems. These studies have revealed a notable connection between shading and CYs, with certain crop varieties showing benefits from shadings e.g., Berries and Leafy Vegetables, Forage remaining largely unaffected, and some crops e.g., Cereals, Grain Legumes, Fruits, and Root [...]
Geochemical volcano monitoring
Published: 2025-03-26
Subjects: Physical Sciences and Mathematics
The geochemistry of volcanic fluids is increasingly employed at volcano observatories worldwide to assess volcano activity state, and eruption potential. Here, we review the state-of-the-art in the field, with a primary focus on the most recent developments in instrumental gas monitoring that have rendered geochemistry an increasingly effective eruption-forecasting tool. We describe the main [...]
Geodesic Location–Allocation for Liquefaction Investigation Coverage in Uttarakhand, India
Published: 2026-09-20
Subjects: Geographic Information Sciences, Geophysics and Seismology, Geotechnical Engineering, Operations Research, Systems Engineering and Industrial Engineering, Physical and Environmental Geography, Spatial Science
Site-scale liquefaction investigations in Uttarakhand are concentrated in the Roorkee–Haridwar and Rudrapur–Khatima corridors. This article asks a narrower, operational question: where should a limited reconnaissance programme investigate next to reduce geographic gaps in that evidence? Fifteen settlement-centred nodes were represented as a complete weighted graph, with four literature-supported [...]
Idealized Earth system model analysis of the primary controls on shallow seafloor oxygenation
Published: 2026-10-09
Subjects: Earth Sciences
Key components of the Earth system, including climate, atmospheric oxygen, the strength of the biological pump, and continental configuration, have varied substantially through time. How these factors might have interacted to shape the evolution of marine life—particularly the availability of viable animal habitat—remains unclear. Here, we apply an Earth system model to investigate how tectonic [...]