Preprints
There are 6976 Preprints listed.
Nationwide deadwood mapping reveals rising mountain forests vulnerability
Published: 2026-03-12
Subjects: Climate, Ecology and Evolutionary Biology, Environmental Monitoring, Environmental Sciences, Forest Sciences
Forest mortality is increasing globally under climate change, making detailed, large-scale monitoring essential for understanding ecosystem responses and guiding adaptive forest management. Here, we present a spatio-temporal assessment of standing deadwood in Switzerland from 2018 to 2023, derived from centimeter-scale high-resolution aerial imagery. We reveal a consistent upslope concentration [...]
Comparison of probabilistic approaches to acoustic full-waveform inversion in compressed model and data spaces
Published: 2026-03-18
Subjects: Physical Sciences and Mathematics
Full-waveform inversion estimates subsurface properties by minimizing the misfit between observed and modelled data. However, conventional deterministic approaches are highly sensitive to noise, dependent on the starting model and prone to converging to local minima of the cost function. Bayesian approaches offer a viable alternative, enhancing solution space exploration and providing uncertainty [...]
EQ-INSAR: A Python Package for Generating Synthetic Earthquake InSAR Deformation Data
Published: 2026-02-24
Subjects: Geophysics and Seismology, Remote Sensing
EQ-INSAR is an open-source Python package for generating synthetic Interferometric Synthetic Aperture Radar (InSAR) surface deformation data from earthquake sources. The package implements the Davis (1986) point source model to compute three component ground displacement from double-couple earthquake mechanisms. Then it projects the displacement onto satellite line-of-sight (LOS) geometries to [...]
Evaluating global spectral unmixing techniques using imaging spectroscopy data for retrieval of green, non-photosynthetic vegetation, and soil fractional cover
Published: 2026-03-12
Subjects: Earth Sciences, Environmental Monitoring, Environmental Sciences, Physical Sciences and Mathematics, Remote Sensing, Soil Science
Global estimates of fractional cover of green vegetation (GV), non-photosynthetic vegetation (NPV), and soil provide valuable information about the Earth system. As the new generation of Earth visible-to-shortwave infrared (VSWIR) imaging spectrometers take orbit, global fractional cover data will be obtainable with new and improved spectral unmixing algorithms. Using an ASD Field Spectrometer [...]
Multi-Sensor Monitoring of Wetland Inundation Using a Machine Learning and Data Fusion Framework
Published: 2026-04-04
Subjects: Applied Statistics, Earth Sciences, Environmental Monitoring, Environmental Sciences, Hydrology, Physical Sciences and Mathematics, Statistics and Probability
Continuous, high-resolution inundation data are needed to understand how small-scale, short-term wetland flooding influences global methane emissions and carbon cycling. Small (less than 1,000 m²), variably inundated wetlands are significant methane sources, yet coarse satellite products often miss their dynamics. Integrating optical and radar imagery with resolutions less than 30 m offers a [...]
Current deformation in Hispaniola from InSAR--derived surface velocities
Published: 2026-05-11
Subjects: Earth Sciences
The oblique convergence between the Caribbean and North American plates is accommodated, in Hispaniola, by left-lateral strike-slip on two major left--lateral fault systems and by intra-arc shortening. We apply a Persistent Scatterer Interferometry (PSInSAR) approach to Sentinel-1 data using six tracks acquired between 2016 and 2023 to generate time series of interseismic velocities over the [...]
Territorially-Specialized Machine Learning Models for Wildfire Risk Prediction Across Argentina Using Satellite Data and H3 Hexagonal Grids
Published: 2026-03-14
Subjects: Earth Sciences, Environmental Sciences
Wildfire risk prediction in large, ecologically diverse countries requires models that account for regional variation in fire drivers. We present GeoAlertAR-ML, a wildfire risk prediction system for Argentina that uses an ensemble of regionally specialized Random Forest classifiers operating over a national hexagonal grid of 13,231 H3 cells. Unlike global fire danger indices or single-model [...]
Seismic Efficiency during Volcanic Unrest: Insights from the 2010 Eyjafjallajökull Eruption
Published: 2026-02-24
Subjects: Earth Sciences, Geophysics and Seismology, Volcanology
Identifying patterns in precursory signals may aid forecasting over month to year timescales. Here we examine the relationship between seismicity and ground deformation during unrest prior to the 2010 Eyjafjallajökull eruption. We find that the ratio between seismic moment and horizontal GPS ground displacement is constant within two distinct phases, but with a step increase from one to the [...]
Sub-pixel mapping of disturbance and tree mortality dynamics from Sentinel-2 time series around the globe
Published: 2026-02-24
Subjects: Artificial Intelligence and Robotics, Biogeochemistry, Computer Sciences, Earth Sciences, Engineering, Environmental Monitoring, Environmental Sciences, Natural Resources and Conservation, Physical Sciences and Mathematics
Elevated forest disturbances and excess tree mortality are increasingly reported worldwide. Yet existing assessments are either based on patchy terrestrial observations or on large-scale satellite products, which are limited in resolution to pixel-level, binary tree loss detection. This leaves a blind spot on fine-scale disturbances where only a few trees are declining in an otherwise intact [...]
Leveraging synthetic data for deep learning denoising and prediction of measured earthquake waveforms
Published: 2026-03-17
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
Single-station recordings of teleseismic earthquakes are inherently complex due to the superposition of numerous seismic phases and their contamination with noise, which can be particularly problematic in urban environments. A detailed knowledge of the wavefield generated by teleseismic earthquakes is critical for high-precision research facilities like those involved in photon science or gravity [...]
Multi-decadal Barrier Island Fate Varies as a Function of Management Strategy
Published: 2026-03-12
Subjects: Earth Sciences, Environmental Sciences, Physical Sciences and Mathematics
Barrier islands are highly dynamic components of sandy coastlines, making up 10% of coastlines globally. Barriers provide recreational opportunities, protect mainland communities from storms, support tourism, and provide ecologically important habitat. Using a spatially explicit barrier island model, CASCADE, calibrated to represent the historical dynamics of Ocracoke, a barrier island in the [...]
Explaining the Equatorial Pacific Thermocline Response to Climate Change with a Model Hierarchy
Published: 2025-10-18
Subjects: Physical Sciences and Mathematics
Most studies of the equatorial Pacific response to anthropogenic forcing have focused on patterns of sea surface temperature (SST) change. However, similar SST patterns can be consistent with a range of different subsurface responses, each with differing physical and biogeochemical implications. While historical observation and climate model mismatches have been suggested in the literature, we [...]
Visualizing Pyroclimotology
Published: 2026-02-25
Subjects: Climate, Environmental Education, Meteorology, Natural Resources Management and Policy, Physical and Environmental Geography, Remote Sensing
Background: Wildland fire activity often demonstrates distinct seasonality adhering to the alignment of climatologically favorable fuels, weather, and ignitions for wildfire or prescribed burning. Improved characterization of conditions that increase fire ignition probabilities, extreme fire behavior, and beneficial fire potential would enhance our understanding of fire regimes and provide [...]
Repurposing enhanced rock weathering for brownfield cleanup: a practical carbonate–silicate remineralization method for stabilizing cationic metals in shallow soils
Published: 2026-04-01
Subjects: Engineering
Brownfield, mining-impacted, urban fill, and legacy agricultural sites often contain cationic metals concentrated in shallow soil horizons, where they sustain direct-contact, dust, and leaching risk and can complicate redevelopment. This paper reframes enhanced rock weathering (ERW), originally advanced for carbon dioxide removal, as a practical remineralization approach for immobilizing cationic [...]
Before the Threshold: Deceptive Stability, Buffer Slack, and Earth System Transitions
Published: 2026-04-21
Subjects: Biogeochemistry, Climate, Earth Sciences, Geochemistry, Other Environmental Sciences
Earth history includes episodes in which persistent biological or geophysical byproduct loads are absorbed by finite environmental sinks and buffers, preserving apparent stability while the capacity to absorb further stress declines. This paper synthesizes literatures on Earth system revolutions, redox transitions, mass extinctions, and Anthropocene change into a comparative framework termed [...]