Preprints
There are 7999 Preprints listed.
Redefining Uncertainty: A Complete Bayesian Workflow for Ocean Color Remote Sensing
Published: 2025-08-28
Subjects: Environmental Monitoring, Marine Biology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Other Earth Sciences
Traditional satellite ocean color algorithms for chlorophyll-a and inherent optical property retrieval rely on deterministic regression models that typically produce single-point predictions without explicit uncertainty quantification. The absence of uncertainty awareness undermines in-situ/model match-ups, reduces predictive reliability, and ultimately erodes user confidence. In the present [...]
Assessing the Economic and Environmental Benefits of Nature-Based Solutions for Sustainable Infrastructure. A Case of Kumasi, Ghana
Published: 2025-08-26
Subjects: Education
Kumasi, Ghana, and most rapidly developing cities in Sub-Saharan Africa are confronted with increasing environmental and infrastructure concerns as a result of rapid urbanization, inadequate land use planning, and climate change. Traditional grey infrastructure has been inadequate in mitigating these problems. This paper assessed the economic and environmental advantages of Nature-Based Solutions [...]
Earthquake body-wave extraction using sparsity-promoting polarization filtering in the time–frequency domain
Published: 2025-08-27
Subjects: Earth Sciences
Seismic waves generated by earthquakes consist of multiple phases that carry critical information about Earth’s internal structure as they propagate through heterogeneous media. Each seismic phase follows its own propagation path and sampling depth, bringing constraints from different regions of the Earth such as the crust, mantle, or even the outer and inner cores. The choice of phase for [...]
Hydrology-Based Coastal Risk Assessment in Charleston, South Carolina: Sea-Level Rise, Land Subsidence, Nuisance Flooding, and the Overlooked Role of Groundwater Attenuation
Published: 2025-08-29
Subjects: Environmental Indicators and Impact Assessment, Environmental Studies, Hydrology, Water Resource Management
Charleston, South Carolina is among the most flood-exposed cities on the United States Atlantic coast. Tide-gauge records show mean sea level rising at 3.51 mm per year since 1921, while InSAR analyses identify localized subsidence exceeding 4 mm per year, producing effective relative rise of 7 to 8 mm per year. This acceleration explains the increase in nuisance flooding from fewer than 5 days [...]
NOVEL & RAPID PROCESSING OF UAS IMAGERY FOR TARGETED CYANOBACTERIAL HARMFUL ALGAL BLOOM SAMPLING
Published: 2026-05-28
Subjects: Environmental Sciences
Unmanned aerial systems (UAS) are an efficient way to monitor and sample algal biomass including cyanobacterial harmful algal blooms (CyanoHABs). However, conventional methods to create a UAS orthophoto of homogeneous water surfaces often produce a patchy, smoothed, or spatially inaccurate output. In this study, we developed a novel method to interpolate a spectral index from a central pixel in [...]
Surface Expression of Low Basal Friction Upstream of Antarctic Grounding Lines
Published: 2025-08-27
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics
Ice sheets leave contact with the bed at grounding lines, beyond which floating ice shelves experience no friction at their base. In places where basal friction begins to decrease upstream of the grounding line, ice sheets respond more strongly to climate forcing. However, the spatial extent of zones of low grounding line friction is poorly constrained by observations. Here, we use a steady-state [...]
Ecosystem metabolism in the lower Columbia and Willamette Rivers, USA: Insights into the juvenile salmonid food web
Published: 2026-05-08
Subjects: Environmental Sciences
The Columbia River and its major tributary, the Willamette River, are large systems impacted by human activities, including the installation of hydroelectric dams. Hourly measurements of dissolved oxygen (DO) from in situ sensors and laboratory incubations showed that daily net ecosystem production (NEP) was slightly positive in the Columbia, with annual NEP of 121.30 gC m-2 y-1. In the [...]
Development of Low-Cost, Open-Source Unmanned Surface Vehicle for Water System Monitoring
Published: 2025-08-28
Subjects: Education, Engineering
Commercially available Unmanned Surface Vehicles (USVs) in the market are expensive, and the software used for automating navigation and bathymetry mapping are typically proprietary. Large scale collection of water quantity and quality data requires dynamic in-situ sensing approaches with open-source software for user flexibility. This manuscript presents an open-source, economic, and efficient [...]
Evaluation of biochar produced from coffee husks as an alternative treatment for wastewater contaminated with agrochemicals in the southwestern region of Antioquia.
Published: 2025-08-28
Subjects: Civil and Environmental Engineering
Excessive use of herbicides, pesticides, and fertilizers has enhanced agricultural productivity but has also generated significant environmental impacts and public health risks. Chlorpyrifos, an organophosphorus insecticide, is highly persistent in the environment due to its affinity for organic matter and its ability to be transported via runoff into water bodies, where conventional wastewater [...]
Snowdrift and Accumulation on Landfast Ice Around Antarctic Icebergs: Insights from Modeling and Observational Data
Published: 2025-08-29
Subjects: Atmospheric Sciences, Glaciology
Snow cover influences sea ice thermodynamics and mass balance, making its distribution and properties critical to polar research. Grounded icebergs in coastal Antarctica substantially affect surface snow distribution and landfast sea ice patterns, which has received limited scientific attention. To address this gap, this study integrates observational data with numerical snow transport [...]
The impacts of volcanism on hydrocarbon-bearing sedimentary basins - Examples from the world-class Neuquén Basin case study, Argentina
Published: 2025-08-29
Subjects: Earth Sciences
The last two decades of research have highlighted that volcanism occurring in sedimentary basins can have substantial effects on sedimentary formations. In particular, igneous intrusions can trigger the generation of large amounts of greenhouse gases in organic-rich host rocks, leading to dramatic climate change and mass extinctions. Volcanism can also have significant impacts on [...]
3D surface displacement estimation over the Groningen gas field, the Netherlands
Published: 2025-08-29
Subjects: Earth Sciences, Environmental Monitoring, Geophysics and Seismology, Mining Engineering, Oil, Gas, and Energy
Since 1964, the Groningen gas field in the Netherlands has experienced significant subsidence due to gas extraction. Although InSAR has been widely used to estimate the vertical displacements of the field, capturing the full three-dimensional deformation, including omnidirectional horizontal components, remained a challenge and has only been achieved from spatially sparse GNSS observations. The [...]
Using X-ray Fluorescence to Detect Automobile Heavy Metal Pollution in Los Angeles Soils with Copper and Palladium as Indicators
Published: 2025-08-29
Subjects: Earth Sciences, Environmental Health and Protection, Environmental Indicators and Impact Assessment, Environmental Monitoring, Environmental Sciences, Geochemistry, Physical Sciences and Mathematics
This project evaluates the effectiveness of using portable X-ray Fluorescence (XRF) to detect soil composition matrices that show patterns of anthropogenic influence. We explore 26 areas within Los Angeles County, California, that have various amounts of traffic; classifying each locale as Urban or Recreational. The main elements of interest are copper and palladium. These indicators are largely [...]
Intelligent National Map: A Vision for Distributed and Agentic Geospatial Intelligence
Published: 2025-08-28
Subjects: Physical Sciences and Mathematics
An Intelligent National Map (INM) can change how worldwide mapping agencies, such as the U.S. Geological Survey, deliver the geospatial foundation of the Nation, as well as the capacity for the public to engage and use the data. It is envisioned as an innovative system that can coordinate analysis for spatial questions using structured reasoning grounded in semantic relationships, domain rules, [...]
Undrainable pore spaces comprise half of US groundwater storage
Published: 2025-08-28
Subjects: Earth Sciences, Environmental Sciences, Hydrology, Physical Sciences and Mathematics, Water Resource Management
Groundwater is vital to global freshwater access, streamflow generation, and biogeochemical cycling, but not all groundwater can be drained due to adhesive and capillary forces. Quantifying the proportion of groundwater that can be drained—and is, thus, theoretically recoverable—is critical for characterising groundwater’s role in earth system processes. Unfortunately, estimates of theoretically [...]