Preprints
There are 7999 Preprints listed.
New methods for predicting the start and other features of the UK (Northern Hemisphere) Sporadic E (Es) radio propagation season
Published: 2025-06-22
Subjects: Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The sporadic E mode of propagation is briefly described and reviewed. The question is posed could we ever predict the start and duration of the main propagation season. A new hypothesis is proposed based on the modulation of planetary weather and wave circulations and their effect on the Es
Assessment of heavy metal contamination in seawater, sediments, and fish tissues from Msimbazi Bay, Dar es Salaam, Tanzania.
Published: 2025-06-25
Subjects: Life Sciences, Marine Biology, Pharmacology, Toxicology and Environmental Health
Heavy metal pollution in marine environments is a growing concern globally due to its potential threats to aquatic ecosystems and human health. Major industrial zones in Tanzania, including Dar es Salaam city, significantly contribute to heavy metal pollution in aquatic ecosystems. The samples for heavy metal analysis in seawater, sediments, and fish tissues were collected, prepared, and [...]
Impact of Gas/Liquid Phase Change of CO2 during Injection for Sequestration
Published: 2025-06-25
Subjects: Engineering
Geodynamic Model Description for Ptolemy’s Germania Magna
Published: 2026-05-13
Subjects: Analysis, Astrophysics and Astronomy, Dynamical Systems, Dynamic Systems, Earth Sciences, Geology, Geomorphology, Geophysics and Seismology, Mathematics, Other Applied Mathematics, Other Astrophysics and Astronomy, Other Earth Sciences, Other Planetary Sciences, Planetary Geology, Planetary Geophysics and Seismology, Statistical Models, Statistics and Probability, Stratigraphy, Tectonics and Structure, The Sun and the Solar System, Volcanology
This model proposes that the well-documented geodynamic and climatic disruption of the 6th century AD involved a reactivation of the ancient Caledonian Deformation Front (CDF) and the Trans-European Suture Zone (TESZ), most likely triggered by cosmic events in the form of impacts or airbursts. Large-scale inversion tectonics, driven by Alpine compressive forces, are argued to have caused [...]
Food security beyond borders: how crop imports affect drought risk of conflict-affected countries
Published: 2025-06-25
Subjects: Agricultural Science, Agriculture, Climate, Environmental Studies, Hydrology, Meteorology, Natural Resources Management and Policy, Sustainability
Drought events can disrupt food security and increase the risk of violent conflicts. In an interconnected global food system, countries rely on both local food production and imports to meet domestic demand. When assessing the impact of drought risk on national food security, however, imported crops are often overlooked. This study incorporates international crop trade information to understand [...]
Climate Change Driven Disruptions in Health Service Uptake and Gender Role Inequities in SubSaharan Africa: A Scoping Review
Published: 2026-04-30
Subjects: Environmental Sciences
Background SubSaharan Africa (SSA) faces deeply intersecting crises in which high climate vulnerability interacts with entrenched gender role inequities, severely compromising population health and resilience. Climatedriven shocks including droughts and floodsdisrupt health systems and disproportionately affect women and girls due to preexisting socioeconomic and cultural [...]
Building a climate resilient health system: Lessons from Health National Adaptation Planning (H-NAP) in Uganda
Published: 2026-04-30
Subjects: Public Health
Climate change is increasingly affecting both health and the systems required to deliver care, particularly in low-resource settings. In response, Uganda developed its Health National Adaptation Plan (H-NAP) 2025–2030 to guide climate change adaptation in the health sector. However, limited analytical attention has been paid to how low-resource countries are developing and institutionalising [...]
A SEISMIC MOMENT MAGNITUDE SCALE
Published: 2025-06-24
Subjects: Engineering, Physical Sciences and Mathematics
Theaimofobtaininga single scale for earthquake magnitudes has led many studies in the past to either develop relationships among various existing scales or develop an altogether new scale to represent a wide range of magnitudes on a single scale. Although a reliable and standardized estimation of earthquake size is a basic requirement for all tectonophysical and engineering applications, [...]
WITHDRAWN: The association between experiencing environmental injustice and climate attitudes: a nationally representative survey of United States residents
Published: 2025-06-26
Subjects: Environmental Studies
Reevaluating sedimentary signatures of micro-tidal processes in fluvial-dominated rivers: the Po River (Italy)
Published: 2025-06-27
Subjects: Earth Sciences
In microtidally influenced rivers, tides are generally assumed to leave virtually no signatures in the sedimentary record. However, this hypothesis has been surprisingly poorly tested using modern river analogues, which provide an opportunity to assess whether sedimentary signatures of microtidal regimes can develop in rivers that lack diagnostic evidence of tidal control on large-scale channel [...]
EGMSpy: an open-source Python toolkit for scalable data handling, classification, clustering, and visualisation of Copernicus EGMS InSAR data
Published: 2026-05-08
Subjects: Civil and Environmental Engineering, Earth Sciences, Environmental Monitoring, Geomorphology
The Copernicus European Ground Motion Service (EGMS) provides millimetre-accuracy line-of-sight displacement measurements for over five billion coherent scatterers across Europe, derived from Sentinel-1 SAR interferometry over the period 2015--2023. Despite the unprecedented spatial coverage and measurement density of this dataset, no open-source integrated toolchain exists for processing, [...]
Assessing Climate and Watershed Controls on Rain-on-Snow Runoff Using XGBoost-SHAP Explainable AI (XAI)
Published: 2025-06-27
Subjects: Climate, Fresh Water Studies, Hydrology, Meteorology, Water Resource Management
Rain-on-snow (ROS) events significantly impact hydrological processes in snowy regions, yet their seasonal drivers remain poorly understood, particularly in low-elevation and low-gradient catchments. This study uses an XGBoost-SHAP explainable artificial intelligence (XAI) model to analyze meteorological and watershed controls on ROS runoff in the Great Lakes Basin. We used daily discharge, [...]
Mapping upper mantle discontinuities beneath the Australian continent using multimode surface waves and receiver functions
Published: 2025-06-27
Subjects: Earth Sciences, Physical Sciences and Mathematics
Spatial distributions of upper mantle discontinuities beneath the Australian continent are mapped using a large number of station-based 1-D S-velocity profiles with radial anisotropy, derived from joint Bayesian inversions of multimode surface waves and P-wave receiver functions. Numerous permanent and temporary stations across Australia enable us to constrain localized seismic velocity [...]
A Comprehensive Assessment of the FireCCILT11 Global Burned Area Product
Published: 2025-06-27
Subjects: Other Earth Sciences
Mangrove Loss and Growing Coastal Flood Exposure in East Malaysia: A Multi-Decadal Analysis with Sea Level Rise Projections
Published: 2026-06-10
Subjects: Earth Sciences, Environmental Sciences, Environmental Studies, Geographic Information Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical and Environmental Geography, Remote Sensing
Mangrove forests provide critical coastal flood protection, yet their ongoing loss in combination with sea level rise creates a compounding exposure dynamic that remains poorly quantified at sub-national scale across Southeast Asia. This study presents the first systematic, multi-decadal analysis of mangrove loss and coastal flood exposure change for the 10 km coastal buffer of East Malaysia [...]