Preprints
There are 7999 Preprints listed.
Comment on Rodríguez Collantes et al. A New Earth Crustal Velocity Field Estimation from ROA cGNSS Station Networks in the South of Spain and North Africa. Remote Sens. 2025, 17, 704
Published: 2026-01-03
Subjects: Earth Sciences, Geophysics and Seismology, Tectonics and Structure
In their recent study, Rodríguez Collantes et al. presented a new GNSS velocity field from the Royal Institute and Observatory of the Spanish Navy (ROA) network, deployed in southern Spain and northern Africa. However, their claims regarding the novelty of certain results and the precision of their findings compared to recent publications are questionable. I present previous studies not cited by [...]
Reviewing chronostratigraphic uncertainty of the Ediacaran-Cambrian transition
Published: 2026-01-02
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Geology, Stratigraphy
The Ediacaran-Cambrian transition archives the widespread disappearance of ‘Ediacaran-type’ soft-bodied biota and the appearance of most modern animal body plans, including a major diversification of skeletal animals and styles of animal-substrate interaction. Despite over a century of study, our ability to confidently reconstruct the series of macroevolutionary events that inform origination and [...]
High-resolution seismic reservoir monitoring with multitask and transfer learning
Published: 2026-01-02
Subjects: Artificial Intelligence and Robotics, Computational Engineering, Geophysics and Seismology, Oil, Gas, and Energy, Sustainability
High-resolution real-time monitoring of reservoir changes is essential during CO2 injection or hydrocarbon production. Here, we leverage convolutional neural networks (CNNs) that employ multitask (MTL) and transfer (TL) learning to accurately predict relevant reservoir parameters from time-lapse seismic data. CNNs are initially trained to estimate the P-wave velocity from 2D multicomponent [...]
The 1935 Guyana event and the 1908 Tunguska event
Published: 2026-01-03
Subjects: Education, Physical Sciences and Mathematics
This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. In 1935 a remarkable event took place in Guyana (at that time British Guiana). A meteor was seen and a large area of devastated forest was discovered. The main source for information on this event was an article published in an astronomical magazine in 1939. The 1939-article provided [...]
Global Environmental Benefits of Plant-Based Diets: A Multi-Regional Input Output Analysis
Published: 2026-01-04
Subjects: Biodiversity, Environmental Studies, Life Sciences, Other Food Science, Pharmacology, Toxicology and Environmental Health, Sustainability
The global food system, especially animal husbandry, is a major driver of negative environmental impacts. This paper investigates the potential of adopting more plant-based diets (vegan, vegetarian, no beef) to reduce greenhouse gas (GHG) emissions, land use and related biodiversity loss, and water stress within global food supply chains. This is achieved by combining Multi-regional Input Output [...]
Low-level wind variability at Jaisalmer and its representation in ERA5 Reanalysis
Published: 2026-01-05
Subjects: Atmospheric Sciences
Jaisalmer has grown to be one of the important wind energy hubs in India following the development of the Jaisalmer Wind Park. In this study we assess the variability of wind speed at various scales, and the occurrence of wind ramps (defined as the change in wind speed over a certain period) at Jaisalmer using high-quality in-situ measurements. A distinct diurnal pattern in wind ramps is seen in [...]
Diel Dynamics of Zooplankton Fecal Pellet Flux Revealed by Integrated Optical Observations and Modeling
Published: 2026-01-24
Subjects: Biogeochemistry, Life Sciences, Marine Biology, Oceanography
The contribution of sinking fecal pellets to the biological carbon pump depends on pellet properties, producer abundance, and the depth and timing of pellet production, which can be modulated by diel vertical migration. We examined diel variability in zooplankton fecal pellet flux in the subarctic Northeast Pacific using two image-based tools: the Underwater Vision Profiler (UVP5) and [...]
Modeling Lithospheric Radioactivity Influence on Atmospheric Electric Properties relative to Earthquakes
Published: 2026-01-04
Subjects: Physical Sciences and Mathematics
This study presents a mathematical exploration of the atmospheric electric field components resulting from radon-induced ionization, with implications in the study of earthquake phenomena. By formalizing the general solution to the proposed equations with given boundary conditions, the research offers a comparative analysis of electric parameters across different radon concentrations and radii of [...]
Spatial Predictor Selection for Next-Day Minimum Temperature Forecasting: An Automated Machine Learning Framework Applied Across European Climate Regimes
Published: 2026-01-06
Subjects: Engineering, Physical Sciences and Mathematics
Accurate prediction of daily minimum temperature (Tmin) is critical for frost protection, energy management, and public health preparedness. While numerical weather prediction models have improved substantially, their performance for Tmin forecasting remains limited by difficulties in representing fine-scale nocturnal processes. This study presents an automated framework for identifying optimal [...]
More Frequent Extreme Precipitation on the Asian Monsoon Fringes Driven by Evolving Extratropical Planetary-Scale Circulations
Published: 2026-01-05
Subjects: Atmospheric Sciences, Climate
In recent decades, the fringes of the Asian summer monsoon, such as Pakistan and Northeast China, have become hotspots of extreme precipitation. Although such increases are often linked to thermodynamic changes in a warming climate, the dynamical drivers behind these trends, particularly the systematic role of extratropical circulations, remain poorly understood. This study identifies the [...]
What are the drivers of riparian vegetation recruitment and establishment in an alpine embanked river?
Published: 2026-01-09
Subjects: Geomorphology, Physical and Environmental Geography, Remote Sensing, Terrestrial and Aquatic Ecology
1 – Rejuvenation operations are often conducted in rivers to manage vegetation encroachment and balance biodiversity benefits and flood risks. Understanding the drivers of vegetation recruitment and establishment is necessary to implement these operations but requires monitoring at spatial and temporal scales that are suited to pioneer riparian environment. 2 – Bi-yearly drone surveys were used [...]
Machine Learning Approaches for Estimating Aquifer Hydraulic Properties from Step-Drawdown Pump Tests: A Case Study in Central Valley, California
Published: 2026-01-06
Subjects: Engineering, Physical Sciences and Mathematics
We present a data-driven, scalable framework for estimating aquifer hydraulic conductivity by integrating step-drawdown pumping test data with well completion records using machine learning techniques. The approach applies Random Forest regression and cluster analysis to large regional datasets obtained from the California Natural Resources Agency and the Department of Water Resources Open Data [...]
HyTC-TaNet: A Hybrid Deep Learning Model Capturing Multi-day Temporal Dependencies for Daily Mean Air Temperature Estimation with Spatial Applicability Analysis
Published: 2026-01-06
Subjects: Agriculture, Artificial Intelligence and Robotics
Aligning science, rulemaking, and practice to strengthen carbon crediting
Published: 2025-02-25
Subjects: Environmental Studies, Social and Behavioral Sciences
Results-based climate finance mobilizes private capital for climate mitigation by paying for verified outcomes [1]. Multiple independent evaluations have shown that credited reductions routinely overstate actual ones—by 3x to 14x across sectors [2–8]—but understanding of why or what to do about it is highly variable. To guide effective policy response, we develop a framework that decomposes the [...]
A Simple Method for Assessing Global Warming of the Earth
Published: 2026-08-02
Subjects: Physical Sciences and Mathematics
Observational science, such as climate science, is experiencing unprecedented development owing to the enormous volume of data generated every day and the increasing use of artificial intelligence, which significantly facilitates and accelerates data processing, analysis, and interpretation. Any significant change in the main measured or calculated variables used for environmental monitoring [...]