Preprints

There are 3244 Preprints listed.

Two-dimensional model of flow and transport in porous media: linking heterogeneous anisotropy with stratal patterns in meandering tidal channel deposits of the Venice Lagoon (Italy)

Elena Bachini, Elena Bellizia, Mario Putti, et al.

Published: 2022-09-08
Subjects: Geomorphology, Hydrology, Numerical Analysis and Computation

Understanding the internal structure of permeable and impermeable sediments (e.g. point-bars and tidal-flat deposits) generated by the evolution of meandering tidal channels is essential for accurate modeling of groundwater flow and contaminant transport in coastal areas. The detailed reconstruction of stratal geometry and hydraulic properties from measurements must be accompanied by depositional [...]

Seasonal water storage in peat-forming bofedales sustains baseflow in the Andes

Jasper Oshun, Wyeth Wunderlich, Kristina Keating, et al.

Published: 2022-09-08
Subjects: Physical Sciences and Mathematics

Humid puna Bofedales, or low gradient peat-forming wetlands, are a characteristic feature of the humid puna - a high elevation, seasonally dry grass- and shrub-land found throughout the Central Andes. Despite the importance of the humid puna in supplying water to downstream communities, and the inference that bofedales may play an important role, few studies have explored the hydrology of [...]

A Reproducible and Reusable Pipeline for Segmentation of Geoscientific Imagery

Daniel David Buscombe, Evan B Goldstein

Published: 2022-09-07
Subjects: Education, Engineering, Life Sciences, Physical Sciences and Mathematics

Segmentation of Earth science imagery is an increasingly common task. Among modern techniques that use Deep Learning, the UNet architecture has been shown to be a reliable for segmenting a range of imagery. We developed software - Segmentation Gym - to implement a data-model pipeline for segmentation of scientific imagery using a family of UNet models. With an existing set of imagery and labels, [...]

Formation of authigenic grey monazite: a marker of palaeo-thermal anomaly in very-low grade metamorphic rocks?

Johann Tuduri, Olivier Pourret, Eric Gloaguen, et al.

Published: 2022-09-07
Subjects: Earth Sciences

The reassessment of the rare earth element (REE) potential of France led us to investigate REE behaviour in black-shales belonging to the Middle Ordovician Angers-Traveusot formation from central Britany (France), with an emphasis on the formation of nodular grey monazite during the diagenetic and low-grade metamorphic evolution. Temperatures conditions and mass transfer underwent in the black [...]

PubDAS: a PUBlic Distributed Acoustic Sensing datasets repository for geosciences

Zack J. Spica, Jonathan Ajo-Franklin, Greg Beroza, et al.

Published: 2022-09-07
Subjects: Civil and Environmental Engineering, Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology

During the past few years, Distributing Acoustic Sensing (DAS) has become an invaluable tool for recording high-fidelity seismic wavefields with great spatiotemporal resolutions. However, the considerable amount of data generated during DAS experiments limits their distribution with the broader scientific community. Such a bottleneck inherently slows down the pursuit of new scientific discoveries [...]

Multi-fold increase in rainforests tipping risk beyond 1.5-2⁰C warming

Chandrakant Singh, Ruud van der Ent, Ingo Fetzer, et al.

Published: 2022-09-06
Subjects: Earth Sciences, Environmental Sciences, Hydrology

Tropical rainforests invest in their root systems to store soil moisture from water-rich periods for use in water-scarce periods. An inadequate root-zone soil moisture storage predisposes or forces these forest ecosystems to transition to a savanna-like state, devoid of their native structure and functions. Yet changes in soil moisture storage and its influence on the rainforest ecosystems under [...]

Isotopically labeled ozone: a new approach to elucidate the formation of ozonation products

Millaray Sierra Olea, Simon Kölle, Emil Bein, et al.

Published: 2022-09-06
Subjects: Chemical Engineering, Chemistry, Engineering, Environmental Sciences

As ozonation becomes a widespread treatment for removal of trace organic chemicals in wastewater treatment plant effluents, there are increasing concerns regarding the formation of ozonation transformation products (OPs), and their possible impacts on the aquatic environment and eventually human health. In this study, a novel method was developed that utilizes the heavy oxygen isotope (18O) for [...]

Variational inference of ice shelf rheology with physics-informed machine learning

Bryan Riel, Brent Minchew

Published: 2022-09-06
Subjects: Earth Sciences, Glaciology, Other Mathematics, Other Statistics and Probability, Physical Sciences and Mathematics

Floating ice shelves that fringe the coast of Antarctica resist the flow of grounded ice into the ocean. One of the key factors governing the amount of flow-resistance provided by an ice shelf is the rigidity of the ice that constitutes it. Ice rigidity is highly heterogeneous and must be calibrated from spatially-continuous surface observations assimilated into an ice flow model. Moreover, [...]

Source location and wavefield characterization of river-induced seismic tremor- A case study near Avoca River, Ireland

Haleh Karbala Ali, Christopher J. Bean

Published: 2022-09-06
Subjects: Earth Sciences, Environmental Monitoring, Environmental Sciences, Geophysics and Seismology, Physical Sciences and Mathematics

River-induced seismic signal (tremor) recorded by deploying seismic stations close to the river can be used to indirectly obtain the flow characteristics of rivers. We conducted an experiment next to Avoca River, County Wicklow, Ireland, where for the first time to our knowledge, we combined the application of beamforming array analysis by deploying two seismic arrays and Frequency-Dependent [...]

Locating Flowing Conduits in Karst Using Amplitude-based Passive Seismic Location Method

Haleh Karbala Ali, Christopher J. Bean

Published: 2022-09-06
Subjects: Earth Sciences, Environmental Monitoring, Environmental Sciences, Geophysics and Seismology, Physical Sciences and Mathematics

The aim of this study is to develop methods for directly detecting energetic groundwater flow in sub-surface conduits through passive seismic applications, by detecting the small ground vibrations (seismic microtremor) that flowing water in the sub-surface may generate. This is in contrast to the current ‘traditional’ approach of attempting to actively image the conduits using geophysical and [...]

Machine learning for understanding inland water quantity, quality, and ecology

Alison Paige Appling, Samantha Kay Oliver, Jordan S. Read, et al.

Published: 2022-09-04
Subjects: Applied Statistics, Fresh Water Studies, Hydrology

This chapter provides an overview of machine learning models and their applications to the science of inland waters. Such models serve a wide range of purposes for science and management: predicting water quality, quantity, or ecological dynamics across space, time, or hypothetical scenarios; vetting and distilling raw data for further modeling or analysis; generating and exploring hypotheses; [...]

Sensitivity, Accuracy and Limits of the Lightweight Three-Component SmartSolo Geophone Sensor (5 Hz) for Seismological Applications

Martin Zeckra, Koen Van Noten, Thomas Lecocq

Published: 2022-09-03
Subjects: Geophysics and Seismology

The use of Nodal systems based on autonomous geophone-based instruments entered the field of Seismology only recently. These lightweight solutions revolutionized seismological fieldwork through lightweight and wholistic instruments that are faster to deploy and easier to handle. The IGU-16HR series of SmartSolo® is one example, but yet lacking a thorough lab-based performance analysis. Here, we [...]

Characterising Ice Slabs in Firn Using Seismic Full Waveform Inversion

Emma Valerie Eve Pearce, Adam Booth, Sebastian Rost, et al.

Published: 2022-09-03
Subjects: Life Sciences

The density structure of firn has implications for hydrological and climate modelling, and ice shelf stability. The structure of firn can be evaluated from depth models of seismic velocity, widely obtained with Herglotz-Wiechert Inversion (HWI), an approach that considers the slowness of refracted seismic arrivals. However, HWI is strictly appropriate only for steady-state firn profiles and the [...]

Modeling present and future plastics dispersal in the global environment and recommendations for cleanup scenarios

Jeroen Sonke, Alkuin Koenig, Nadiia Yakovenko, et al.

Published: 2022-09-02
Subjects: Physical Sciences and Mathematics

Since 1950 humans have introduced 8300 teragrams (Tg, 1012 grams, millions of metric tons) of plastic polymers into the Earth’s surface environment. Accounting for the dispersal and fate of produced plastics and fragmented microplastics in the environment has been challenging. Recent studies have fueled debate of the global river budget for plastic transport to oceans, the sinking and beaching of [...]

Rapid fault healing after seismic slip

John Bedford, Takehiro Hirose, Yohei Hamada

Published: 2022-09-01
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Tectonics and Structure

Fault strength recovery (healing) following an earthquake is a key process in controlling the recurrence of future events; however, the rates and mechanisms of fault healing are poorly constrained. Here, by performing high-velocity friction experiments, we show that granite and gabbro fault gouges recover their strength rapidly after experiencing dynamic weakening during seismic slip. The healing [...]

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