Preprints
There are 6976 Preprints listed.
A Techno-Economic Analysis of Australian Green Steel Production from Hydrogen
Published: 2022-02-15
Subjects: Engineering
Green steel - produced using hydrogen and electricity from renewable energy sources - provides both the means to decarbonize steel manufacturing and a way to facilitate growth of the international hydrogen industry. Australia, with its abundant renewable resources and ample iron-ore deposits, is in an excellent position to participate in this opportunity. We highlight the synergies between the [...]
The open collection of geoscience graphics
Published: 2022-02-15
Subjects: Databases and Information Systems, Earth Sciences, Environmental Sciences, Graphics and Human Computer Interfaces, Instructional Media Design, Planetary Sciences
A standard internet image search on a geoscientific topic is common practice, and offers a plethora of images. However, the suggested images provide neither a guarantee in the accuracy of the science content being portrayed, nor in their visual accessibility or clarity. Being curated by both scientists and artists, the online s-ink collection (https://s-ink.org) is a sharing platform for high [...]
The 2021 eruption of the Cumbre Vieja Volcanic Ridge on La Palma, Canary Islands
Published: 2022-02-17
Subjects: Physical Sciences and Mathematics
Almost exactly half a century after the eruption of the Teneguía Volcano on La Palma (26 October to 28 November 1971), a new eruption occurred on the island and lasted for 85 days from 19 September until 13 December 2021. This new eruption opened a volcanic vent complex on the western flank of the Cumbre Vieja rift zone, the N-S elongated polygenetic volcanic ridge that has developed on La Palma [...]
Along-Dip Segmentation of the Slip Behavior and Rheology of the Copiapó Ridge Subducted in North-Central Chile
Published: 2022-02-24
Subjects: Geology, Geophysics and Seismology, Tectonics and Structure
We studied the along-dip influence of the Copiapó ridge subduction in the Atacama region, North-Central Chile by building a new seismicity catalog, including similar events and non-volcanic tremors (NVTs). We also obtained a 3-D tomographic model for P- and S-waves velocity (and the implied Vp/Vs ratio). We identify down-dip segmentation involving 4 distinct segments: a locked seismogenic zone [...]
Contribution of zooplankton nutrient recycling and effects on phytoplankton size structure in a hypereutrophic reservoir
Published: 2022-02-17
Subjects: Biochemistry, Biology, Ecology and Evolutionary Biology, Life Sciences, Other Life Sciences
Consumer nutrient recycling influences aquatic ecosystem functioning by altering the movement and transformation of nutrients. In hypereutrophic reservoirs, zooplankton nutrient recycling has been considered negligible due to high concentrations of available nutrients. A comparative analysis (Moody and Wilkinson, 2019) found that zooplankton communities in hypereutrophic lakes are dominated by [...]
Constrained 1.5-Layer Hamiltonian Toy Models for Stratospheric Dynamics
Published: 2022-02-24
Subjects: Physical Sciences and Mathematics
A two-layer Hamiltonian toy model consisting of two isentropic stratospheric layers is simplified using perturbation analysis while preserving the Hamiltonian structure. These two layers are neutrally and stably stratified. The first approximation applies when the Froude number of the upper isentropic layer is small, such that the upper surface is approximately rigid, and this upper layer is much [...]
Early evolution of the Adelaide Superbasin
Published: 2022-02-17
Subjects: Earth Sciences, Geochemistry, Geology, Sedimentology, Stratigraphy, Tectonics and Structure
Continental rifts have a significant role in supercontinent breakup, and the development of sedimentary basins. The Australian Adelaide Superbasin is one of the largest and best-preserved rift systems that initiated during the breakup of Rodinia, yet substantial challenges still hinder our understanding of its early evolution and place within the Rodinian supercontinent. In the past decade, our [...]
A one-million-year isotope record from siderites formed in modern ferruginous sediments
Published: 2022-02-17
Subjects: Biogeochemistry, Other Environmental Sciences, Sedimentology, Stratigraphy
Ancient iron formations hold important records of environmental conditions during the Precambrian Eons. Reconstructions of past oceanic systems require investigating modern ferruginous analogs to disentangle water column and diagenetic signals recorded in iron-bearing minerals. We analyzed oxygen, iron, and carbon isotopes in siderite, a ferrous carbonate phase commonly used as an environmental [...]
What Determines the Future Ecological Risks of Wastewater Discharges in River Networks: Load, Location or Climate Change?
Published: 2022-02-17
Subjects: Environmental Sciences
Over the last decades, treatment of domestic wastewater promoted by environmental regulations have reduced human health risks and improved water quality. However, ecological risks caused by effluents of wastewater treatment plants (WWTPs) discharged into rivers still persist. Moreover, the evolution of these ecological risks in the future is intimately related to effects of changing climate, [...]
Climate nonlinearities: selection, uncertainty, projections, & damages
Published: 2022-03-09
Subjects: Earth Sciences
\textbf{Abstract:} Climate projections are highly uncertain; this uncertainty is costly and impedes progress on climate policy. This uncertainty is primarily parametric (what numbers do we plug into our equations?) and structural (what equations do we use in the first place?). The former is straightforward to characterise in principle, though may be computationally intensive for complex climate [...]
Freshwater Suspended Particulate Matter – Key Components and Processes in Floc Formation and Dynamics.
Published: 2022-02-18
Subjects: Biogeochemistry, Environmental Chemistry, Environmental Microbiology and Microbial Ecology Life Sciences, Environmental Sciences, Fresh Water Studies, Geochemistry, Hydrology, Sedimentology
Freshwater suspended particulate matter (SPM) plays an important role in many biogeochemical cycles and serves multiple ecosystem functions. Most SPM is present as complex floc-like aggregate structures composed of various minerals and organic matter from the molecular to the organism level. Flocs provide habitat for microbes and feed for larger organisms. They constitute microbial bioreactors, [...]
Numerical experiments on extreme waves through oblique-soliton interactions
Published: 2022-02-18
Subjects: Physical Sciences and Mathematics
Extreme water-wave motion is investigated analytically and numerically by considering two-soliton and three-soliton interactions on a horizontal plane. We successfully determine numerically that soliton solutions of the unidirectional Kadomtsev-Petviashvili equation (KPE), with equal far-field individual amplitudes, survive reasonably well in the bidirectional and higher-order Benney-Luke [...]
Differences in running velocity and boldness between male and female Atlantic sand fiddler crab (Leptuca pugilator)
Published: 2022-02-19
Subjects: Animal Sciences, Ecology and Evolutionary Biology, Marine Biology
Atlantic sand fiddler crabs (Leptuca pugilator) exhibit an extreme case of sexual dimorphism with the male crabs wielding an enlarged dominate claw that can account up to 40% of an individual’s total body mass. The salt pans found in marine marshes are commonly colonized by fiddler crabs and have limited coverage from avian predators, making the ability to quickly run back their burrows, an [...]
Temporal Variability in Snow Accumulation and Density at Summit Camp, Greenland Ice Sheet
Published: 2022-03-09
Subjects: Physical Sciences and Mathematics
A three-year record of weekly snow water equivalent (SWE) accumulation at Summit Camp, central Greenland Ice Sheet, obtained by direct sampling, is presented. While the overall SWE accumulation of 24.2 cm w.e. per year matches long-term ice core estimates, variability increases at shorter time scales. Half of the annual SWE accumulation occurs during a few large events, with the average [...]
The south-verging Isortoq Nappe of Baffin Island, Canada: implications on the framework of the northeastern Trans-Hudson Orogen
Published: 2022-02-22
Subjects: Earth Sciences, Physical Sciences and Mathematics
The Isortoq Shear Zone (ISZ), a 100km-scale structure in northern Baffin Island, was originally identified through the interpretation of regional geophysical surveys. In the field the ISZ is cryptic, and its significance ambiguous with respect to the regional structural framework of northern Baffin Island. Mapping along the ISZ and within the spatially associated Archean Isortoq and Eqe Bay [...]