Preprints
There are 5874 Preprints listed.
Development and Performance Evaluation of a WT-LSTM Hybrid Model for Global Land Meteorological Drought Prediction
Published: 2025-06-17
Subjects: Engineering, Physical Sciences and Mathematics
In recent years, droughts have become increasingly frequent worldwide, leading to issues such as reduced agricultural yields and ecological degradation in various regions. To mitigate the impact of drought on human survival and development, this study utilizes the Standardized Precipitation Evapotranspiration Index (SPEI) to analyze the spatiotemporal variations of global droughts. The results [...]
Chapter 3.2 - Distributed Volcanic fields
Published: 2025-06-17
Subjects: Physical Sciences and Mathematics
Distributed volcanic fields are typically low magma-flux systems, and occur in every tectonic setting. Their volcanoes are typically but not exclusively small-volume (≤1 km3 of magma). The most typical type of volcanoes associated with volcanic fields include scoria cones, tuff rings, maars, tuff cones, spatter cones, and associated lava flows, in addition to sparse medium-size shields and lava [...]
Curved fault slip captured by CCTV video during the 2025 Mw 7.7 Mandalay earthquake
Published: 2025-06-16
Subjects: Geophysics and Seismology
On-fault geological observations from surface breaking earthquakes typically contain curved slickenlines, suggesting fault slip is curved. However, slickenlines commonly record only a fraction of coseismic slip, making it difficult to reconstruct the full slip trajectory. Near-fault seismic records, though capable of capturing ground motions associated with rupture, are limited in their ability [...]
IMPACTS OF LAND-USE CHANGES ATTRIBUTED TO DISCHARGE LEVEL OF MAHA OYA RIVER BASIN, SRI LANKA
Published: 2025-06-16
Subjects: Environmental Engineering, Hydraulic Engineering
River discharge in tropical regions are driven by both rainfall and land-use changes. This study quantifies how land-cover change and altered rainfall regimes have affected discharge in the Maha Oya River basin, Sri Lanka. Previous studies suggest that the river basin had been subjected to serious erosion due to increased soil digging, clay mining, and high flood vulnerability over the last three [...]
Hellenic Arc tsunami generation from Mw8+ 3D margin-wide dynamic rupture earthquake scenarios
Published: 2025-06-16
Subjects: Geophysics and Seismology
The Hellenic Arc subduction zone is the most seismically active region in the Mediterranean, capable of generating large earthquakes and tsunami. Given the proximity of densely populated coastlines, understanding the characteristics of potential future large tsunamigenic earthquakes is crucial for assessing tsunami hazard. We present non-linear shallow water tsunami simulations sourced from the [...]
Unraveling the effect of convergence obliquity on overriding-plate deformation and strain partitioning in subduction zones
Published: 2025-06-16
Subjects: Tectonics and Structure
The subduction of an oceanic plate causes deformation of the overriding plate, from the forearc to the back-arc regions. Over years, to address the physical controls on such a deformation, various compilations on active deformation have been made, mixing various types of datasets including fault-slip rates, focal mechanisms and geodetic motions. The growing amount of available data now allows for [...]
WITHDRAWN: Constraining the onset of future irreversible retreat of Thwaites Glacier, Antarctica
Published: 2025-06-16
Subjects: Earth Sciences, Glaciology
withdrawn
Simple solar system measurements indicate a weaker than expected relevance of Carbon Dioxide to present day earth temperature.
Published: 2025-06-15
Subjects: Physical Sciences and Mathematics
Recent and newly discovered causes of global warming are discussed especially in the context of lower relevance to CO2. Heat transfer mechanisms are discussed. The link between convective heat transfer and the thermodynamic and planetary hypotheses of Nikolov and Zeller are discussed. It is considered that the maximum surface temperature reached on an airless planetary body ( planet or moon) is [...]
Separate sectoral decarbonization policies accelerate climate action but could jeopardize key sustainability targets
Published: 2025-06-15
Subjects: Engineering
The Paris Agreement grants countries flexibility in designing their pathways to net-zero emissions, yet most have focused on economy-wide, cost-effective approaches without clearly defining the role of sectoral emission reductions and/or carbon dioxide removal (CDR). These blanket strategies prioritize low-cost sectors, leaving significant residual emissions and relying on uncertain, largely [...]
Gamified Learning for Sustainable Eating: Exploring the Role of Prior Knowledge and Readiness to Change
Published: 2025-06-14
Subjects: Environmental Studies
Background: Dietary habits play a central role in the transition toward a more sustainable food system. However, many consumers lack an understanding of the principles of sustainable eating. Objective: This study examined whether a gamified quiz could enhance knowledge about the environmental impact of food. Additionally, it explored the role of prior knowledge and readiness for change, based on [...]
A century of flow and surge history of Sít’ Tlein(Malaspina Glacier), Southeast Alaska
Published: 2025-06-14
Subjects: Earth Sciences, Physical Sciences and Mathematics
Sít' Tlein (Malaspina Glacier), located in Southeast Alaska, has a complex flow history. This piedmont glacier, the largest in the world of its kind, is fed by three main tributaries that all exhibit similar flow patterns, yet with varying surge cycles. The piedmont lobe is dramatically reshaped by surges that occur at approximately decadal timescales. By combining historical accounts with modern [...]
Effects of IBGE's 2019 Biomes Definition on Different Political-Administrative Scales in Brazil
Published: 2025-06-13
Subjects: Sustainability
In 2019, the official delimitation of the Brazilian biomes was updated to a considerably more detailed description compared to the previous definition that lasted 15 years. This work investigates the possible effects of such changes in different political-administrative scales, ranging from biomes to the municipality level. We define effect levels according to the changes between the biomes in [...]
Determination of Low Molecular Weight Organic Acids in Environmental Samples by Ion Chromatography Method
Published: 2025-06-13
Subjects: Life Sciences, Medicine and Health Sciences, Physical Sciences and Mathematics
Ion chromatography using the IonPac AS 11 HC analytical column, a 3.0 mM NaOH eluent, and a conductivity detector offers a straightforward, cost-effective, and rapid method for quantifying six organic acids, Lactate, Formate, Acetate, Propionate, Pyruvate, and Glyoxalate, at concentrations as low as micrograms per liter in environmental samples. The method includes comprehensive details on [...]
Combined thermodynamic-kinetic-competitive controls on anaerobic respiration pathways and the chemistry of natural waters
Published: 2025-06-13
Subjects: Biogeochemistry, Earth Sciences
Microbial metabolisms underpin geochemical cycling in nearly all of the Earth's biosphere. Anaerobic pathways of carbon mineralization by iron and sulfate reduction and methanogenesis, in particular, have existed over most of Earth history and have been central in shaping the chemistry of the oceans and atmosphere. The governing principles by which microbial metabolisms contribute to water-column [...]
Green Hydrogen from Biomass in Kenya: Geospatial Feed-stock Mapping and Decentralized Energy Integration
Published: 2025-06-13
Subjects: Engineering, Physical Sciences and Mathematics
As countries race to decarbonize, green hydrogen has emerged as a crucial clean energy transformation vehicle. In Sub-Saharan Africa, sufficient biomass resource potential exists to become an actual feedstock for decentralised hydrogen production, but under-explored are the spatial mismatches between resource occurrences and infrastructure systems. The paper conducts a geospatial assessment of [...]