Preprints
There are 5929 Preprints listed.
Learning in a Crisis: Online Skill Building Workshop Addresses Immediate Pandemic Needs and Offers Possibilities for Future Trainings
Published: 2021-01-28
Subjects: Computer Sciences, Earth Sciences, Education, Geophysics and Seismology, Scholarship of Teaching and Learning
The COVID-19 pandemic led to the suspension of many summer research opportunities for STEM students. In response, the IRIS Education and Outreach program, in collaboration with Miami University, offered a free online Seismology Skill Building Workshop to increase undergraduates' knowledge, skills, self-efficacy, and interest in observational seismology and scientific computing. Registrations were [...]
The active and passive roles of the ocean in generating basin-scale heat content variability
Published: 2021-01-28
Subjects: Climate, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The role of ocean circulation in transforming surface forcing into interannual-to-multidecadal oceanic variability is an area of ongoing debate. Here, a novel method, establishing exact causal links, is used to quantitatively determine the role of ocean active and passive processes in transforming stochastic surface forcing into heat content variability. To this end, we use a global ocean model [...]
Data Reference Syntax (DRS) for bias-adjusted C3S-CMIP5 simulations
Published: 2021-01-27
Subjects: Climate
This document specifies the Data Reference Syntax (DRS) elements for managing bias-adjusted C3S-CMIP5 simulation data. The document includes file naming conventions and metadata as NetCDF attributes. The DRS elements are allowed to either assume values defined by Controlled Vocabularies (CV), or free text, or free text with build rules.
101 Geodynamic modelling: How to design, interpret, and communicate numerical studies of the solid Earth
Published: 2021-01-27
Subjects: Geophysics and Seismology
Geodynamic modelling provides a powerful tool to investigate processes in the Earth's crust, mantle, and core that are not directly observable. However, numerical models are inherently subject to the assumptions and simplifications on which they are based. In order to use and review numerical modelling studies appropriately, one needs to be aware of the limitations of geodynamic modelling as well [...]
Fault Throw and Regional Uplift Histories from Drainage Analysis: Evolution of Southern Italy
Published: 2021-01-25
Subjects: Earth Sciences, Geology, Geomorphology, Tectonics and Structure
Landscapes can record elevation changes caused by multiple tectonic processes. Here we show how coeval histories of spatially coincident normal faulting and regional uplift can be deconvolved from river networks. We focus on Calabria, a tectonically active region incised by rivers containing knickpoints and knickzones. Marine fauna indicate that Calabria has been uplifted by >1 km since [...]
Towards underwater plastic monitoring using echo sounding
Published: 2021-01-25
Subjects: Environmental Monitoring, Fresh Water Studies, Hydrology
Plastics originating from land are mainly transported to the oceans by rivers. The total plastic transport from land to seas remains uncertain because of difficulties in measuring and the lack of standard observation techniques. A large focus in observations is on plastics floating on the water surface. However, an increasing number of observations suggest that large quantities of plastics are [...]
Observational estimates of dynamic topography through space and time
Published: 2021-01-24
Subjects: Biogeochemistry, Cosmochemistry, Earth Sciences, Geochemistry, Geology, Geomorphology, Geophysics and Seismology, Paleobiology, Physical Sciences and Mathematics, Sedimentology, Stratigraphy, Tectonics and Structure, Volcanology
Earth's mantle undergoes convection on million-year timescales as heat is transferred from depth to the surface. Whilst this flow has long been linked to the large-scale horizontal forces that drive plate tectonics and supercontinent cycles, geologists are increasingly recognising the signature of convection through transient vertical motions in the rock record, known as "dynamic topography". A [...]
Deciphering paleogeography from orogenic architecture: constructing orogens in a future supercontinent as thought experiment
Published: 2021-01-24
Subjects: Physical Sciences and Mathematics
Orogens that form at convergent plate boundaries typically consist of accreted rock units that form an incomplete archive of subducted oceanic and continental lithosphere, as well as of deformed crust of the former upper plate. Reading the construction of orogenic architecture forms the key to decipher the paleogeographic distribution of oceans and continents, as well as bathymetric and [...]
The joint sets on the Lilstock Benches, UK. Observations based on mapping a full resolution UAV-based image
Published: 2021-01-24
Subjects: Geology
Outcrop studies of fracture networks are important to understand fractured reservoirs in the subsurface, but complete maps of all fractures in large outcrops are rare due to limitations of outcrop and image resolution. We manually mapped the first full-resolution UAV-based, Gigapixel dataset and DEM of the wave-cut Lilstock Benches in the southern Bristol Channel basin, a classic outcrop of [...]
Vertical fluxes conditioned on vorticity and strain reveal submesoscale ventilation
Published: 2021-01-24
Subjects: Oceanography, Oceanography and Atmospheric Sciences and Meteorology
It has been hypothesized that submesoscale flows play an important role in the vertical transport of climatically important tracers, due to their strong associated vertical velocities. However, the multi-scale, non-linear and Lagrangian nature of transport makes it challenging to attribute proportions of the tracer fluxes to certain processes, scales, regions or features. Here we show that [...]
A review of last interglacial sea-level proxies in the eastern Mediterranean coastal region
Published: 2021-01-23
Subjects: Physical Sciences and Mathematics
Mediterranean ‘raised beaches’ were subject to Quaternary research since the early years of the 20th century. The uniqueness of a warm-loving molluscs fauna immigrating into the Mediterranean made the coastline a prime interest for studying Quaternary sea-level changes. Today, we have a detailed picture of this historically important coastline characterised by tectonically dormant coastal zone [...]
Developing luminescence analysis of Icelandic volcanic glass: a case study using the Þórsmörk Ignimbrite
Published: 2021-01-22
Subjects: Physical Sciences and Mathematics
Large volcanic eruptions from Iceland can produce significant volumes of glass-rich rhyolitic tephra, which are then deposited across NW Europe and the North Atlantic-Arctic region, forming time-parallel marker horizons useful to palaeoenvironmental studies. Here we investigate new ways of improving the tephrochronological record of Iceland using (thermo)luminescence analysis of rhyolitic [...]
Arctic soil patterns analogous to fluid instabilities
Published: 2021-01-22
Subjects: Physical Sciences and Mathematics
Slow-moving arctic soils commonly organize into striking large-scale spatial patterns called solifluction terraces and lobes. Though these features impact hillslope stability, carbon storage and release, and landscape response to climate change, no mechanistic explanation exists for their formation. Everyday fluids—such as paint dripping down walls—produce markedly similar fingering patterns [...]
High precision estimation of modeled aerosol direct radiative forcing
Published: 2021-01-22
Subjects: Physical Sciences and Mathematics
Aerosol radiative forcing can be difficult to quantify both accurately and precisely in global climate models. Long climate model integrations are often required and levels of statistical uncertainty can be substantial for some of the diagnostic methods and diagnosed forcings. Instantaneous estimates of sulfate aerosol direct radiative forcings in the present-day climate are compared to forcings [...]
Carbon dioxide removal through enhanced weathering of basalt on agricultural land –Assessing the potential in Austria
Published: 2021-01-22
Subjects: Earth Sciences, Environmental Sciences
Enhanced weathering through basalt application on agricultural land represents a proposed strategy for the removal of carbon dioxide from the atmosphere. It has been shown that enhanced weathering is principally feasible on a global scale, but it remains unclear whether it can be implemented on a local level. This information is however vital, to evaluate, if enhanced weathering should be further [...]