Preprints
There are 6976 Preprints listed.
Improved representation of laminar and turbulent sheet flow in subglacial drainage models
Published: 2023-07-07
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics
Subglacial hydrology models struggle to reproduce seasonal drainage patterns that are consistent with observed subglacial water pressures and surface velocities. We modify the standard sheet-flow parameterization within a coupled sheet--channel subglacial drainage model to smoothly transition between laminar and turbulent flow based on the locally computed Reynolds number in a physically [...]
Projecting Future Heat Stress Disparities to 2100 in the Contiguous United States
Published: 2023-07-09
Subjects: Social and Behavioral Sciences
Global warming increases health risks from heat exposure. Historical evidence suggests disproportionate impacts of heat exposure in different regions across socioeconomic groups in the US. However, little is known about the scale of potential disparities and which populations stand to be most vulnerable under different future climate scenarios. Here, we assess county-level heat exposure, measured [...]
Sequence stratigraphy of the Eocene-Miocene Mrayt Group, North-Western Rif (Morocco)
Published: 2023-07-07
Subjects: Physical Sciences and Mathematics
Detailed sequence stratigraphy of the Eocene-Miocene Mrayt Group in North-Western Rif (Morocco), allow identifying the nature and the sources of the sediment supplies, the sedimentary facies and the depositional environments as well as the factors that controlled the sedimentation. This work made it also possible to identify 16 facies sequences that have never been described before. facies [...]
Transporting Heat Flux From the US and Europe to Antarctica Guided by Regional Seismic Structure
Published: 2023-07-08
Subjects: Earth Sciences, Geophysics and Seismology, Glaciology, Physical Sciences and Mathematics
Subglacial geothermal heat flux affects the dynamics of the Antarctic ice sheet but is poorly known. We estimate heat flux across West Antarctica and the interior of East Antarctica by transporting heat flux observations from the contiguous US and Europe, based on seismic structure with a lateral resolution of about \qty{100}{km}. We transport with three Machine Learning models across a hierarchy [...]
Moral Hazards and Geoengineering: Evidence from a Large-Scale Online Experiment
Published: 2023-07-08
Subjects: Social and Behavioral Sciences
Geoengineering (especially solar radiation management) may help to reduce the negative outcomes of climate change by minimising or reversing global warming. However, many express the worry that geoengineering may pose a moral hazard, i.e., that information about geoengineering may lead to a reduction in climate change mitigation efforts. In this paper, we report a large-scale pre-registered, [...]
Mitigation effectiveness on groundwater-dependent ecosystems revealed by counterfactual AI
Published: 2023-07-09
Subjects: Artificial Intelligence and Robotics, Environmental Engineering, Hydrology, Sustainability, Water Resource Management
Overexploitation of groundwater threatens groundwater-bound aquatic and terrestrial biodiversity and ecosystem stability, underscoring the need to devise appropriate mitigation strategies. Yet, substantial scientific evidence that mitigation measures effectively protect groundwater ecosystems is presently nonexistent. We provide unique and compelling evidence, using counterfactual artificial [...]
Heuristic Data-inspired Scheme to Characterize Meteorological and Groundwater Droughts in Semi-arid Karstic Region under Warming Climate
Published: 2023-07-08
Subjects: Environmental Engineering, Environmental Indicators and Impact Assessment, Hydrology
Study region The Edwards Aquifer Region is located in south-central Texas, United States. Study focus The paper focuses on the development and implementation of a data-inspired heuristic drought identification scheme to (i) quantify the intensity, duration, and frequency of precipitation deficit- and high temperature-driven meteorological droughts (PMet- and TMet-droughts), and (ii) link [...]
Optimising the value of a CO2 Water-Alternating-Gas injection project under geological and economic uncertainties using an improved artificial neural network.
Published: 2023-07-08
Subjects: Engineering, Other Engineering
The numerical simulations required for the robust optimisation of the alternating injection of water and CO2 in hydrocarbon reservoirs are computationally expensive due to engineering, geological, and economic uncertainties. Using approximation models of the desired objective function(s) can significantly decrease the cost associated with the optimisation routines while providing an adequate [...]
Electric Circuit Theory as a method for monitoring tree water deficit at different scales
Published: 2023-07-11
Subjects: Forest Biology, Forest Sciences, Other Forestry and Forest Sciences
Climate change is expected to alter precipitation patterns, making droughts more frequent in some areas, which will expose trees to more severe water deficits which could result in the catastrophic collapse of their water transport system and, eventually, mortality. To inform forest management and tree species suitability to increase forest resilience requires a robust method for understanding [...]
Calcium isotope constraints on Mesoarchean seawater
Published: 2025-04-24
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Geology, Physical Sciences and Mathematics, Sedimentology
The cause of the Great Oxidation Event ~2.4 billion-years-ago (Ga) is hotly debated. Recent models favor the emergence of continents as driving the event. However, we suggest that extensive shallow-marine carbonate platforms existed in the Mesoarchean. This conclusion is based on Ca isotopes from 2.8 Ga carbonate rocks, that constrains the Ca isotope value of Mesoarchean seawater to -0.5‰ [...]
A high-resolution, 3D groundwater-surface water simulation of the contiguous US: Advances in the integrated ParFlow CONUS 2.0 modeling platform
Published: 2023-07-10
Subjects: Engineering
Large-scale, high-resolution hydrologic modeling is an important tool to address questions of water quantity, availability, and recharge. Continental-to-Global scale models, particularly those that include groundwater, are growing in number. However, many of these approaches simplify aspects of the system and the connections between e.g., surface water and groundwater. The ParFlow CONUS modeling [...]
Techno-economic evaluation of the potential of CO2 storage and Enhanced Oil Recovery in the Niger-Delta Hydrocarbon Basin using reservoir simulation: Case Study
Published: 2023-07-12
Subjects: Engineering, Other Engineering
The constant dependence on fossil fuel combustion for energy and industrial activities results in global warming and climate change due to the increased atmospheric concentration of greenhouse gases such as CO2. CO2 storage in mature petroleum reservoirs is considered one of the most viable ways to reduce CO2 concentrations in the atmosphere. The Niger-Delta hydrocarbon basin holds significant [...]
An Artificial Neural Network to Estimate the Foliar and Ground Cover Input Variables of the Rangeland Hydrology and Erosion Model
Published: 2023-07-12
Subjects: Artificial Intelligence and Robotics, Environmental Monitoring, Hydrology, Natural Resources and Conservation, Natural Resources Management and Policy, Soil Science
Models like the Rangeland Hydrology and Erosion Model (RHEM) are useful for estimating soil erosion, however, they rely on input parameters that are sometimes difficult or expensive to measure. Specifically, RHEM requires information about foliar and ground cover fractions that generally must be measured in situ, which makes it difficult to use models like RHEM to produce erosion or soil risk [...]
A deep learning approach for deriving winter wheat phenology from optical and SAR time series at field level
Published: 2023-07-13
Subjects: Agricultural Science, Agriculture, Artificial Intelligence and Robotics, Environmental Monitoring
Information on crop phenology is essential when aiming to better understand the impacts of climate and climate change, management practices, and environmental conditions on agricultural production. Today’s novel optical and radar satellite data with increasing spatial and temporal resolution provide great opportunities to provide such information. However, so far, we largely lack methods that [...]
Recent increase in a recurrent pan-Atlantic wave-pattern driving concurrent wintertime extremes
Published: 2023-07-13
Subjects: Physical Sciences and Mathematics
Wintertime extremes such as cold spells and heavy precipitation can have severe socioeconomic impacts, disrupting critical infrastructures and affecting human wellbeing. Here, we relate the occurrence of local and concurrent cold or wet wintertime extremes in North America and Europe to a recurrent, quasi-hemispheric wave-4 Rossby wave pattern. We identify this pattern as a fundamental mode of [...]