Preprints
There are 6295 Preprints listed.
Regional Responses to Oceanic Variability Constrain Global Drought Synchrony
Published: 2025-07-11
Subjects: Civil and Environmental Engineering, Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology
Synchronized droughts threaten global food security, with concerns about increased frequency and duration under climate change. However, their long-term evolution and physical limits remain unknown. We analyze 61 drought networks over 120 years (1901–2020) of scPDSI data, employing a suite of network synchronization measures and empirical orthogonal functions to unravel the physical drivers and [...]
Mapping Europe's Natural Hydrogen Potential: A Continental-Scale Geological Prospectivity Assessment
Published: 2025-07-11
Subjects: Earth Sciences
Natural hydrogen, generated by a range of geological processes in the Earth's crust, is emerging as a promising carbon-neutral energy source. However, systematic large-scale assessments of its subsurface occurrence remain limited. This study presents the first continental-scale prospectivity map of natural hydrogen in Europe, integrating geological indicators of hydrogen generation, reservoir [...]
Deglaciation history and relative sea level changes since the Last Glacial Maximum in the southern Gulf of St. Lawrence, Canada
Published: 2025-07-10
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Sedimentology, Stratigraphy
During the last glacial period, continents and surrounding shelves in high latitude regions of the Northern Hemisphere were covered by ice sheets. Their retreat during the late Pleistocene and Holocene resulted in isostatic adjustments of the previously glaciated landmass, which influenced post-glacial changes in relative sea level (RSL). Many questions, however, remain about the timing and [...]
Warming in the Western Mediterranean Fuels Wetter European Storms and Heightens Extreme Flood Potential Rapid Mediterranean warming brings extreme floods risks for Europe
Published: 2025-07-10
Subjects: Environmental Sciences
The Mediterranean Sea is warming rapidly, with profound implications for regional hydroclimate extremes. The Gulf of Genoa, a critical source region for European storm systems, has exhibited a 1.17°C increase in sea surface temperature (SST) between 2010 and 2020. This study links accelerated SST warming to enhanced atmospheric moisture availability, suggesting a substantial increase in storm [...]
Conservation is Coherence: Introducing the Negawatt Philosophy of Lawful Design
Published: 2025-07-10
Subjects: Civil and Environmental Engineering, Ecology and Evolutionary Biology, Environmental Studies, Natural Resources and Conservation, Operations Research, Systems Engineering and Industrial Engineering, Other Environmental Sciences, Other Physics, Other Planetary Sciences, Sustainability, Systems Biology
This paper articulates the Negawatt Philosophy, reframing conservation not as omission or moral restraint, but as the structural intelligence that sustains life and preserves biospheric coherence. Modern economies valorise extraction and combustion while treating conservation as invisible absence. Yet thermodynamics reveals life as negentropy—an ordering that defies the drift into entropy’s [...]
GROW: A Global Time Series Dataset for Groundwater Studies within the Earth System
Published: 2025-07-10
Subjects: Physical Sciences and Mathematics
Groundwater is a central component of the Earth system. However, our understanding of how it is dynamically interlinked with the atmosphere, hydrosphere, cryosphere, biosphere, geosphere, and anthroposphere remains limited. In the pursuit of understanding groundwater dynamics across diverse global settings, we present GROW (global integrated GROundWater package). This analysis-ready, [...]
Variable methane–arsenic interactions in groundwater of Northern Bangladesh revealed by stable isotopes and geochemical analyses
Published: 2025-07-10
Subjects: Physical Sciences and Mathematics
The reductive dissolution of arsenic (As)-bearing Fe(III) (hydr)oxides is widely regarded as the primary mechanism driving As mobilisation into groundwater in the aquifers of Bangladesh. Recently, methane (CH4) has been proposed as a potentially important electron donor in this process, with CH4 oxidation by methanotrophic bacteria facilitating Fe(III) reduction and subsequent As release. [...]
Leveraging Large Language Models for Automating Water Distribution Network Optimization
Published: 2025-07-10
Subjects: Engineering
Effective management of Water Distribution Networks (WDNs) is essential to ensure efficient and reliable water supply in cities. However, many management tasks require complex system modelling and optimization approaches, which heavily rely on specialized domain expertise and human resources. Recent advancements in Large Language Models (LLMs) offer promising opportunities to automate complex [...]
Regional Variability of Drought-Crop Sensitivities Across Iowa Using Unsupervised Learning
Published: 2025-07-10
Subjects: Engineering
Understanding the spatial variability of crop drought sensitivity is critical for improving agricultural resilience in the face of climate change. This study presents a station-level analysis of meteorological and yield data across Iowa from 1998 to 2022 to investigate the relationship between multiple drought indices and detrended yields of Corn and Soybean. Eleven drought indicators were [...]
Crystal cargo perspectives on magma assembly and dynamics during the 2021 Tajogaite eruption, La Palma, Canary Islands
Published: 2025-07-08
Subjects: Volcanology
The 2021 eruption of Tajogaite was the longest duration eruption, most voluminous, and had the largest human impact in recorded history on La Palma, Canary Islands. Extensive geophysical and geochemical data were collected during both the preceding unrest and eruptive event. Petrological monitoring was largely restricted to rapid stereo microscope observation and a few supporting in-depth studies [...]
Glacier algae phenology on the Qaanaaq Ice Cap (Northwest Greenland)
Published: 2025-07-08
Subjects: Glaciology, Physical Sciences and Mathematics
Glacier algae are relevant factors in the darkening phenomenon of glaciers, especially at the margins of the ice sheets. This study focuses on glacier algae variation during summer seasons in the 2016-2023 period at Qaanaaq Ice Cap, NW Greenland. Based on ice samples and field spectroscopy measurements, an empirical model is proposed to estimate glacier algae abundance from a reflectance ratio [...]
Constraining the paleoclimate and paleoecology of the Selandian – Thanetian transition in the Lower Wilcox, Texas Gulf Coast
Published: 2025-07-08
Subjects: Earth Sciences, Geochemistry, Sedimentology, Stratigraphy
The Selandian–Thanetian Transition Event (STTE) represents a relatively understudied interval of carbon cycle instability and environmental disruption during the Paleocene. This study presents a comprehensive sedimentological, palynological, and geochemical record of the STTE based on two shallow marine wells (Moczygemba VT #11 and Vogelsang Frieda #1) from the Texas Gulf Coast. Our multi-proxy [...]
Assessing the impact of automatically derived depth phases on the determination of earthquake hypocentres – application to the South America subduction zone
Published: 2025-07-08
Subjects: Geophysics and Seismology
Accurate earthquake hypocentres are fundamental to a wide range of geophysical studies, yet source depth remains poorly constrained in teleseismic earthquake catalogues. Near source surface reflections such as pP, sP, and sS (known as depth phases) provide critical information for resolving hypocentral depth, particularly for intermediate-depth earthquakes. The number of depth phases reported by [...]
A quasi-real-time system for automatic local event monitoring in Germany
Published: 2025-07-08
Subjects: Geophysics and Seismology
We present TieBeNN, a wrapper that integrates open-source, state-of-the-art seismic monitoring tools, including advanced machine learning--based approaches, to enhance the German Federal Seismological Survey’s (EdB) automatic real-time earthquake monitoring system. TieBeNN extends the existing workflow by adding automatic, probabilistic focal depth estimation using NonLinLoc and introduces a [...]
Assessing the plausibility of direct constraints on ancient atmospheric pCO2 from fluid inclusions in halite: A theoretical and experimental approach
Published: 2025-07-07
Subjects: Earth Sciences, Physical Sciences and Mathematics
Fluid inclusions in halite formed in surficial environments have recently gained attention for their ability to capture and preserve samples of ancient air, and by mechanical decrepitation, these inclusion gases can be quantified via mass spectrometry. However, it has yet to be demonstrated that the CO2 content measured on halite accurately represents the overlying air at various CO2 [...]