Preprints

There are 2627 Preprints listed.

Competing feedback in an idealized tide-influenced delta network

Niccolò Ragno, Nicoletta Tambroni, Michele Bolla Pittaluga

Published: 2021-12-03
Subjects: Earth Sciences, Geomorphology, Physical Sciences and Mathematics

The morphodynamic evolution of river deltas is intimately tied to flow and sediment partitioning at bifurcations. In this work, we investigate the long-term equilibrium configuration of a simple delta network using an analytical model, which accounts for the effect of small tidal oscillations. Differently from individual bifurcations, where tidal action is always a stabilizing factor, in the [...]

Can machine learning improve carbon storage? Synergies of deep learning, uncertainty quantification and intelligent process control

Thilo Wrona, Indranil Pan

Published: 2021-12-02
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Sustainability

As we transition from fossil fuel to renewable energy, negative emission technologies, such ascarbon capture and storage (CCS), can help us reduce CO2 emissions. Effective CO2 storage requires: (1) detailed site characterization, (2) regular, integrated risk assessment, and (3) flexible design and operation. We believe that recent advances in machine learning coupled with uncertainty [...]

An Online-Learned Neural Network Chemical Solver for Stable Long-Term Global Simulations of Atmospheric Chemistry

Makoto Michael Kelp, Daniel J. Jacob, Haipeng Lin, et al.

Published: 2021-12-02
Subjects: Engineering, Physical Sciences and Mathematics

A major computational barrier in global modeling of atmospheric chemistry is the numerical integration of the coupled kinetic equations describing the chemical mechanism. Machine-learned (ML) solvers can offer order-of-magnitude speedup relative to conventional implicit solvers, but past implementations have suffered from fast error growth and only run for short simulation times (<1 month). A [...]

Shallow depth, substantial change: fluid-metasomatism causes major compositional modifications of subducted volcanics (Mariana forearc)

Elmar Albers, John W Shervais, Christian T Hansen, et al.

Published: 2021-12-02
Subjects: Earth Sciences, Geochemistry, Geology

Mass transfer at shallow subduction levels and its ramifications for deeper processes remain incompletely constrained. New insights are provided by ocean island basalt (OIB) clasts from the Mariana forearc that experienced subduction to up to ~25–30 km depth and up to blueschist-facies metamorphism; thereafter, the clasts were recycled to the forearc seafloor via serpentinite mud volcanism. We [...]

Thermal budgets of magma storage constrained by diffusion chronometry: the Cerro Galán ignimbrite

Jordan Lubbers, Shan de Silva, Adam J Kent

Published: 2021-12-02
Subjects: Physical Sciences and Mathematics

The long-term thermochemical conditions at which large bodies of silicic magma are stored in the crust is integral to our understanding of the timing, frequency, and intensity of volcanic eruptions, and provides important context for volcano monitoring data. Despite this realization, however, individual magmatic systems also may have unique time-temperature paths, or thermal histories, that are [...]

Sensitivity of horizontal surface deformation to mantle dynamics from 3D instantaneous dynamics modeling of the eastern Mediterranean region

Anne C Glerum, Wim Spakman, Douwe J.J. van Hinsbergen, et al.

Published: 2021-11-29
Subjects: Geophysics and Seismology, Tectonics and Structure

Geodetically estimated surface motions contain contributions to crustal deformation from coupled geodynamic processes active at all spatial scales and constitute key data for lithosphere dynamics research. Data interpretation methods should therefore account for the full range of possible processes, otherwise risking misinterpretation of data signal and incorrect estimation of lithosphere [...]

Estuarine-deltaic controls on coastal carbon burial in the western Ganges-Brahmaputra delta over the last 5,000 years

Rory Patrick Flood, Margaret Georgina Milne, Graeme T Swindles, et al.

Published: 2021-11-26
Subjects: Applied Statistics, Biogeochemistry, Earth Sciences, Environmental Sciences, Geochemistry, Geology, Geomorphology, Other Earth Sciences, Other Environmental Sciences, Other Statistics and Probability, Physical Sciences and Mathematics, Sedimentology, Statistical Methodology, Statistical Models, Statistics and Probability, Water Resource Management

The Ganges–Brahmaputra fluvial system drains the Himalayas and is one of the largest sources of terrestrial biosphere carbon to the ocean. It represents a major continental reservoir of CO2 associated with c. 1–2 billion tons of sediment transported each year. Shallow coastal environments receive substantial inputs of terrestrial carbon (900 Tg C yr−1), with allochthonous carbon capture on [...]

Conceptualizing the hydrogeothermal setting of Sloquet Hot Springs in the Canadian Cordillera on unceded St'at'imc Territory: an example of a reconciliation-based approach to field geoscience

Ashley Van Acken, Tom Gleeson, Darryl Peters, et al.

Published: 2021-11-26
Subjects: Hydrology, Natural Resources Management and Policy, Physical Sciences and Mathematics

Field geoscience has made important scientific advances but has not consistently considered the impact of these geoscience results on communities where the fieldwork is conducted. A reconciliation-based approach calls for critical thought about who defines, participates in, owns, and uses geoscience research, particularly in light of unresolved aboriginal rights and title claims and treaty rights [...]

Variety of the drift pumice clasts from the 2021 Fukutoku-Oka-no-Ba eruption, Japan.

Kenta Yoshida, Yoshihiko Tamura, Tomoki Sato, et al.

Published: 2021-11-25
Subjects: Geology, Volcanology

Pumice rafts that arrived at the Nansei Islands, Japan, provided a unique opportunity to investigate the Fukutoku-Oka-no-Ba (FOB) eruption of August 2021. Despite drifting for two months for >1300 km, the drift pumice raft had a large volume and contained a variety of pumice clasts, some of which were deposited during a high tide in a typhoon, while others were washed up on a sandy beach. Most of [...]

Accurate specification of water availability shows its importance for global crop production

Jonathan Proctor, Angela Rigden, Duo Chan, et al.

Published: 2021-11-24
Subjects: Physical Sciences and Mathematics

It is well established that warming temperatures damage the yields of many crops across the globe. Yet the influence of water supply on global agricultural yield and its relation to water demand and direct temperature stress is unclear. A number of global studies found a minor influence for precipitation, whereas some regional analyses suggest a more prominent role for water availability. Here, [...]

A review of model-based scenario analysis of poverty for informing sustainability

QI LIU, Zhaoxia Guo, Lei Gao, et al.

Published: 2021-11-22
Subjects: Applied Mathematics, Dynamic Systems, Environmental Sciences, Natural Resources Management and Policy, Physical Sciences and Mathematics, Sustainability

Ending poverty in all its forms everywhere is the first goal being targeted by the United Nations 2030 Agenda for Sustainable Development. Poverty eradication is a long-term process that faces the challenges of many uncertainties and complex interactions with other Sustainable Development Goals (SDGs). In order to better understand poverty and contribute to addressing poverty in a sustainable [...]

Declining Carbon Emission/Concentration during COVID-19: A critical review on temporary relief

Joydip Sengupta

Published: 2021-11-22
Subjects: Environmental Sciences

In December 2019 the deadly pandemic COVID-19 traumatized mankind through its lethal impact. To seize the outbreak, nationwide/region-based lockdown strategies were adopted by most of the COVID-19 affected countries. This in turn resulted in restricted transportation via surface, water, and air, as well as significantly reduced working hours of the industry sectors, so on and so forth. [...]

The distinct problems of physical inconsistency and of multivariate bias potentially involved in the statistical adjustment of climate simulations

Mégane Alavoine, Patrick Grenier

Published: 2021-11-22
Subjects: Physical Sciences and Mathematics

Bias adjustment of numerical climate model simulations involves several technical and epistemological arguments wherein the notion of physical inconsistency is often referred to, either for rejecting the legitimacy of bias adjustment in general or for justifying the necessity of sophisticated multivariate techniques. However, this notion is often mishandled, in part because the literature [...]

The Influence of Grain Shape and Size on the Relationship Between Porosity and Permeability in Sandstone

Ryan L. Payton, Domenico Chiarella, Andrew Kingdon

Published: 2021-11-18
Subjects: Earth Sciences, Geology, Physical Sciences and Mathematics, Sedimentology

An accurate and reliable description of the relationship between porosity and permeability in geological materials is valuable in understanding subsurface fluid movement. This is of great importance for studies of reservoir characterisation, useful for energy exploitation, carbon capture, use and storage (CCUS) and groundwater contamination and remediation. Whilst the relationship between pore [...]

C3S Energy: an operational service to deliver power demand and supply for different electricity sources, time and spatial scales over Europe

Laurent Dubus, Yves-Marie Saint-Drenan, Alberto Troccoli, et al.

Published: 2021-11-17
Subjects: Applied Statistics, Climate, Earth Sciences, Environmental Sciences, Statistical Models

The EU Copernicus Climate Change Service (C3S) has produced an operational climate service, called C3S Energy, designed to enable the energy industry and policy makers to assess the impacts of climate variability and climate change on the energy sector in Europe. The C3S Energy service covers different time horizons, for the past forty years and the future. It provides time series of electricity [...]

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