Preprints
There are 6668 Preprints listed.
Conceptual challenges in astrobiological analog environments and paths toward resolution
Published: 2026-02-13
Subjects: Biology, Other Life Sciences, Other Planetary Sciences, Planetary Sciences
Analog environments are terrestrial environments that resemble extraterrestrial sites; this concept originated in space sciences for defining methods to study planetary geology, training for missions and testing research instruments. As biological research became integrated into these investigations - through studies of limits for life and possible biosignatures - and astrobiology grew as a [...]
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 [...]
Evaluating economic opportunities and challenges for energy recovery from methane leaks during wastewater treatment
Published: 2026-02-13
Subjects: Engineering, Environmental Engineering
Methane leaks from wastewater treatment represent the loss of biogas that can be used to generate onsite energy, offsetting costs and improving efficiency. Here, we characterize emissions from water resource recovery facilities by compiling measurement data and calculating biogas-production normalized leak rates for facilities with anaerobic digestion. For plants where biogas data were [...]
From Data to Policy : Strengthening Essential Climate Variable Monitoring with Deep Learning Algorithms and Data Quality Standards
Published: 2026-02-13
Subjects: Physical Sciences and Mathematics
Essential Climate Variables (ECVs) are critical for understanding and monitoring climate systems, providing important data to assess climate change and supporting policy formulation. This review emphasizes the importance of ensuring data quality, traceability, and consistency to derive reliable features from ECV datasets, addressing challenges such as temporal and spatial coverage gaps, [...]
Effects of Groundwater Withdrawals for Water Bottling and Municipal Use, Wards Brook Valley, Maine and New Hampshire
Published: 2026-02-13
Subjects: Environmental Sciences
Hydrologic models for the Wards Brook valley near Fryeburg, Maine were developed for historical (2016 – 2021) and hypothetical future conditions (2046 – 2065 and 2080 – 2099) to understand the effects of groundwater withdrawals for bottled water and municipal use on hydrologic conditions (stream base flows and groundwater levels). Analyses showed that the simulated base flows in Wards Brook were [...]
End-to-End Differentiable Auto-Calibration of a Distributed Glacio-Hydrological Model Using Physically Consistent Routing
Published: 2026-02-13
Subjects: Engineering
Distributed glacio-hydrological models are essential for simulating runoff processes in glacier-fed Himalayan basins, yet their application is often constrained by extensive data requirements, high computational costs, and reliance on manual, trial-and-error calibration. Recent auto-calibration approaches using stochastic optimization or machine learning have shown promise, but they frequently [...]
Two-thirds of global coastline affected by climate-driven saline groundwater intrusion by end of century, reaching far inland by 2300
Published: 2026-02-13
Subjects: Earth Sciences, Hydrology, Physical Sciences and Mathematics
Fresh groundwater is a vital resource along global coastlines where already over a third of the world’s population lives. Saline groundwater intrusion, driven by sea-level rise, groundwater abstraction, and reduced recharge, threatens the potability of coastal groundwater. Yet, the global potential for intrusion remains uncertain. Using a global groundwater model, we assess climate-driven saline [...]
Exploring the sensitivity of the vanadium redox proxy to Fe/Mn-(oxyhydr)oxide cycling in a basinal oxic margin setting
Published: 2026-02-13
Subjects: Physical Sciences and Mathematics
Accurately interpreting the redox state of ancient seawater using the Vanadium (V) paleo-redox proxy requires us to have a comprehensive understanding of the sinks that might impact vanadium’s cycling in the ancient ocean. Ferromanganese (oxyhydr)oxides accumulating in sediments beneath oxic seawater probably constitute the largest modern sink of marine V. In many oxic sediment sinks, V [...]
Extraction and re-implementation of SWAT-Model calculations under the MAELIA platform in order to simulate the socio-environmental impacts of norms
Published: 2026-02-13
Subjects: Civil and Environmental Engineering
MAELIA (Multi-Agent for EnvironmentaL norms Impact Assesment) is an agent-based simulation platform designed to assess the impact of alternative water management policies at the watershed level. It simulates interactions between human activities (agricultural, domestic and industrial withdrawals, regulations of water uses) and ecological processes (crop growth, plant evapotranspiration and water [...]
A quantitative assessment of the reliability and feasibility of process-based urban stormwater quality models: Towards new evaluation criteria
Published: 2026-02-13
Subjects: Civil and Environmental Engineering
Hydrologic models have been increasingly used as a numerical tool to support urban stormwater management. Evaluation of modeling approaches helps identify the strength and weakness of a model to meet end-user requirements. However, traditional model evaluations only focus on the technical performance of a model, whereas very few studies have been conducted to quantitatively evaluate practical [...]
Aerosol from the Asian monsoon ubiquitous throughout the extratropical stratosphere
Published: 2026-02-13
Subjects: Physical Sciences and Mathematics
Asian summer monsoon (ASM) convection efficiently transports surface emissions into the upper troposphere, leading to the formation of the Asian tropopause aerosol layer (ATAL). The ATAL can affect Earth’s climate directly by scattering solar radiation and indirectly by cloud formation. Little is known about the global distribution of aerosol originating in the ASM, particularly in the [...]
Multiple-Well Monitoring Site Adjacent to the Midway- Sunset and Buena Vista Oil Fields, Kern County, California
Published: 2026-02-13
Subjects: Earth Sciences, Geochemistry, Geology, Hydrology, Physical Sciences and Mathematics
Groundwater quality in and around oil fields in the Southern San Joaquin Valley is of interest to many California residents that rely heavily on groundwater for domestic, commercial, and agricultural use. To help assess the effects of historical oil-field activities and natural geologic sources on groundwater near the southwest margins of the Kern County Groundwater Subbasin, a multiple-well [...]
A preliminary seismic catalog for the Mozambique Channel
Published: 2026-02-13
Subjects: Geophysics and Seismology, Tectonics and Structure
The Mozambique Channel is a 1,600-km long, 950 – 1,000-km wide deep-water arm of southwestern Indian Ocean, located between Mozambique and Madagascar Island. The channel hosts the offshore continuation of the East African Rift System, an active divergent plate boundary that has propagated from the African continent, across Mesozoic continental rifted margins, into Mesozoic oceanic lithosphere. [...]
Shifting the Paradigm: Redefining the Chronostratigraphy of the Triassic Rewan Group, Bowen Basin, Australia
Published: 2026-02-13
Subjects: Earth Sciences, Geology, Physical Sciences and Mathematics, Tectonics and Structure
The Triassic continental Rewan Group in the northern Bowen Basin, Queensland, Australia, consisting of the Sagittarius Sandstone and the Arcadia Formation, preserves a key record of terrestrial environments and faunas that have been assumed to document recovery following the end‑Permian mass extinction (EPME). The Rewan Group accumulated in a retroarc foreland basin during the Hunter–Bowen [...]
Scholte-wave Adjoint Tomography for Building Low-frequency, Offshore Shear-wave Velocity Models
Published: 2026-02-13
Subjects: Geophysics and Seismology
Field observations have shown that low-frequency (sub-1 Hz) Scholte waves retrieved from ocean-bottom node (OBN) data are strongly influenced by large-scale velocity heterogeneities such as salt bodies, underscoring their potential for offshore model building. However, procedures for translating this sensitivity into reliable subsur- face velocity models remains poorly understood. Motivated by [...]