Preprints
There are 6600 Preprints listed.
vathra.xyz — Crowdsourced Monitoring of Greece's Geodetic Heritage: Architecture, Empirical Results, and Legal Framework
Published: 2026-03-04
Subjects: Earth Sciences, Engineering, Other Earth Sciences, Other Physical Sciences and Mathematics
Greece's national trigonometric network comprises 25,258 geodetic survey points established by the Hellenic Military Geographical Service (HMGS/GYS). This paper presents vathra.xyz, an open-source web platform for crowdsourced condition monitoring of these points using Volunteered Geographic Information (VGI) methods. We describe the system architecture (React, PostGIS, Leaflet, browser-based AR [...]
High-resolution interactive global flood forecast for past, present, and future
Published: 2026-03-04
Subjects: Engineering
Globally operating modelling approaches for flood dynamics have shown significant increases in usage, quality and availability in recent years. Flood modelling at global scale stretches the computational demand, due to combinations of spatial scale and resolution, limiting to static pre-computed maps and prohibiting interactivity. Particular high-resolution global models are only available as [...]
Deep-learning climate emulator ACE2 reveals a global decrease in tropical cyclone 5 frequency in the 15th Century under an El Niño-like sea surface temperature pattern
Published: 2026-03-04
Subjects: Physical Sciences and Mathematics
The relatively short modern observational record limits our understanding of the relationship between global tropical cyclone (TC) frequency and sea surface temperature (SST), resulting in uncertain future TC projections. Using novel deep-learning-based past-millennium simulations with the Ai2 Climate Emulator version 2 (ACE2), we provide insight into the connections between SSTs and TCs. ACE2 [...]
Automated Levee Detection in Digital Elevation Models
Published: 2026-03-04
Subjects: Geomorphology
Current flood risk models applied at national and global scales do not---or only partially---take levees into account, resulting in inaccurate flood inundation maps. While levees are important assets in natural hazard risk assessments, accurate information in the public domain about the location and height of these embankments is often missing. Remote sensing data---such as global digital [...]
On the seasonal predictability of the 2020 North Atlantic tropical cyclone season
Published: 2026-03-04
Subjects: Physical Sciences and Mathematics
The 2020 Atlantic tropical cyclone (TC) season was exceptionally active, producing over twenty named storms, yet several seasonal forecasts failed to predict such extreme activity across their ensemble spread. Even when forced with the observed 2020 sea surface temperatures (SSTs), physics-based models simulated only a moderately active season across their ensemble members. Using observations and [...]
Cube2sph-GPU: A GPU accelerated toolkit enabling flexible continental-scale regional and teleseismic full waveform inversion
Published: 2026-03-03
Subjects: Geophysics and Seismology, Physical Sciences and Mathematics
We present Cube2sph-GPU, a GPU-accelerated framework for continental-scale regional and teleseismic full-waveform inversion (FWI). Building upon the capabilities of SPECFEM3D_Cartesian, the toolkit introduces: (1) a flexible hybrid simulation scheme for tele-seismic simulations; (2) curvilinear C-PML; (3) spherical PDE-based kernel smoothing; and (4) highly optimized GPU kernels and I/O [...]
Future heat-stress regimes under CMIP6: a multi-index assessment of persistence and human-relevant thermal constraints
Published: 2026-03-03
Subjects: Environmental Indicators and Impact Assessment, Environmental Studies, Geography, Nature and Society Relations
Human exposure to heat stress is increasing under climate change as rising temperatures interact with atmospheric moisture to constrain thermoregulation and outdoor activity. While numerous heat-stress indices are used in climate impact studies, their joint interpretation in terms of climatic regimes, persistence, and physiological relevance remains fragmented. Here, we provide a global, [...]
Stable isotopic composition, paleoecology, and habitat of the ammonite Sphenodiscus lobatus in the Late Cretaceous (Maastrichtian) Western Interior Seaway
Published: 2026-03-03
Subjects: Earth Sciences, Geochemistry, Paleobiology, Paleontology, Sedimentology
Despite their abundance as fossils, the life histories of ammonites are still poorly understood. We analyzed the oxygen (δ18O) and carbon (δ13C) isotopic composition of well-preserved shell material taken from different growth stages of the streamlined oxyconic ammonite species Sphenodiscus lobatus from the Upper Cretaceous (Maastrichtian) Pierre Shale and Fox Hills Formation of South Dakota. [...]
Accounting for uncertainty from internal variability in global-temperature based attribution of climate extremes with single realisations
Published: 2026-03-03
Subjects: Physical Sciences and Mathematics
Attribution of regional climate change to anthropogenic forcing within the single realisation available from observations is an important but challenging goal for statistical methods in climate science. Correlating regional conditions with global temperatures is a popular approach, especially for attributing downstream impacts on human health or the economy. However, the influence of internal [...]
QM1D: A 1D model of shear attenuation in the mantle from differential body waves
Published: 2026-03-03
Subjects: Geophysics and Seismology
Constructed floating wetlands cut greenhouse gas emissions from wastewater lagoons
Published: 2026-03-02
Subjects: Life Sciences
Wastewater treatment is a significant, yet often overlooked, contributor to global greenhouse gas emissions, accounting for ~1.6% of anthropogenic emissions (~0.77 Gt CO2-equivalent per year), including 7-10% of methane (CH4) and nitrous oxide emissions (N2O). However, scalable mitigation options remain scarce. Constructed floating wetlands (CFWs) are widely used to reduce nutrient loads in [...]
Hamiltonian Monte Carlo applied to inverse petrological problems
Published: 2026-03-02
Subjects: Earth Sciences, Mineral Physics, Probability
Inversion is inherent in petrology and is used to investigate both experimental and natural field data. When field observations, petrography, geochronology and geochemistry are combined with numerical models, inversion is used to quantify important parameters that provide insights into natural processes involved in the petrogenesis of rocks. Additionally, with the current advances in the field of [...]
Water-efficient Indian rice cultivation boosts exports despite high carbon footprints
Published: 2026-03-02
Subjects: Agriculture, Earth Sciences, Environmental Sciences, Life Sciences, Physical Sciences and Mathematics, Planetary Sciences, Plant Sciences
Most agricultural sustainability efforts adopt a national-scale view, masking regional trade-offs between crop yields and environmental footprints. To measure trade-offs, satellite remote sensing based life cycle assessment of rice agroecosystems across India from 2004 to 2021 was conducted revealing pivotal shifts of four cultivation typologies, termed as unsustainable, conventional, productive, [...]
Wildfire house loss hazard mapping and fuel management scenario planning on a Tasmanian wildland-urban interface using radiant heat and firebrand exposure modelling
Published: 2026-03-02
Subjects: Forest Management, Physical and Environmental Geography, Spatial Science
Globally, wildfire disasters are increasing in frequency through a combination of urban expansion into flammable wildlands and climate change. Accordingly, the wildland urban interface (WUI) is a crucial geographic domain for disaster risk reduction. Accurate mapping of wildfire house loss hazard is a basic requirement for effective wildfire risk management. We developed a novel geographic [...]
Structural Transformation, Energy Intensity, and GHG Emissions in East Africa: Implications for Green Development
Published: 2026-03-02
Subjects: Environmental Studies
This paper dissected the intricate drivers of per-capita greenhouse gas emissions across East Africa, with a laser focus on the dynamics of sectoral shifts in synergy with the shockwaves of energy consumption for a time period of 1993 to 2022. The study engaged a balanced panel of five East African countries which are Burundi, Kenya, Rwanda, Tanzania, Uganda. The balanced panel was designed [...]