Preprints
There are 5476 Preprints listed.
How reproducible and reliable is geophysical research? A review of the availability and accessibility of data and software for research published in journals
Published: 2022-11-17
Subjects: Earth Sciences, Geophysics and Seismology, Oceanography and Atmospheric Sciences and Meteorology, Oil, Gas, and Energy, Other Earth Sciences, Physical Sciences and Mathematics, Sustainability
Geophysical research frequently makes use of agreed methodologies, formally published software, and bespoke code to process and analyse data. The reliability and repeatability of these methods is vital in maintaining the integrity of research findings and thereby avoiding the dissemination of unreliable results. In recent years there has been increased attention on aspects of reproducibility, [...]
Technical note: A procedure to clean, decompose and aggregate time series
Published: 2022-11-17
Subjects: Computer Sciences, Earth Sciences, Environmental Sciences, Physical Sciences and Mathematics, Statistics and Probability
Errors, gaps and outliers complicate and sometimes invalidate the analysis of time series. While most fields have developed their own strategy to clean the raw data, no generic procedure has been promoted to standardize the pre-processing. This lack of harmonization makes the inter-comparison of studies difficult, and leads to screening methods that can be arbitrary or case-specific. This study [...]
The future of coastal monitoring through satellite remote sensing
Published: 2022-11-15
Subjects: Engineering, Physical Sciences and Mathematics
Satellite remote sensing is transforming coastal science from a ‘data-poor’ field into a ‘data-rich’ field. Sandy beaches are dynamic landscapes that change in response to long-term pressures, short-term pulses, and anthropogenic interventions. Until recently, the rate and breadth of beach change has outpaced our ability to monitor those changes, due to the spatiotemporal limitations of our [...]
Evolution of intraplate magmatism atop a mantle plume: geochemical and chronological analysis of Shawahit Basalt, Harrat Rahat, Saudi Arabia
Published: 2022-11-15
Subjects: Earth Sciences, Geology, Geomorphology, Geophysics and Seismology, Stratigraphy, Tectonics and Structure, Volcanology
Harrat Rahat is the largest volcanic eld in Saudi Arabia and has been active from ~10 Ma to the present day. Due to its close proximity to important population centres, Harrat Rahat's recent eruptions, the Medinah lava flows (< 1.7 Ma), have been extensively studied to identify volcanic risk. However, the evolution of Harrat Rahat's most extensive and oldest lava flows, known collectively as the [...]
Bayesian analysis of ground motion models using chimney fragility curves: 2021, 5.9-Mw Woods Point intraplate earthquake, Victoria, Australia
Published: 2022-11-15
Subjects: Earth Sciences, Engineering, Physical Sciences and Mathematics, Probability, Statistics and Probability
The 22 September 2021 (AEST) Mw 5.9 Woods Point earthquake occurred in an intraplate setting (southeast Australia) approximately 130 km East Northeast of the central business district of Melbourne (pop. ∼5.15 million). A lack of seismic instrumentation and a low population density in the epicentral region resulted in a dearth of near-source instrumental and “felt” report intensity data, limiting [...]
Epitomic Data for Community Land Model Standalone Simulations for Prognostic Analyses of Tropical Mountain Glaciation and Lake Temperature in Pre-Industrial, Last Glacial Maximum, and Extreme Glacial Climates
Published: 2022-11-15
Subjects: Climate, Fresh Water Studies, Glaciology, Hydrology
Global climate models typically simulate climate at much larger spatial scales than tropical mountain glaciers and many of the world’s lakes. Yet some of the proxy data that can be used to validate models of past climate on land come from and are related to these geographic features. Validating global climate models using these proxies requires some method of downscaling global climate model [...]
Energy budget diagnosis of changing climate feedback
Published: 2022-11-15
Subjects: Oceanography and Atmospheric Sciences and Meteorology
The climate feedback determines how Earth's climate responds to anthropogenic forcing. It has been more negative in recent decades than predicted by Earth system models due to a sea surface temperature `pattern effect', whereby warming is concentrated in the western tropical Pacific, where nonlocal radiative feedbacks are very negative. This phenomenon has however primarily been studied within [...]
PREPRINT: A global platform solution for Big Data in low-temperature thermochronology
Published: 2022-11-12
Subjects: Earth Sciences, Geochemistry, Physical Sciences and Mathematics
Low-temperature thermochronology is a powerful tool for constraining the thermal evolution of geological materials at temperatures (< ~300 °C) common in the upper crust in relation to geodynamics, continental crustal evolution, landscape evolution, and natural resource formation and preservation. However, complexities inherent to these analytical techniques can make interpreting the significance [...]
Reconsideration of the pre-1970 model for the timing of oil expulsion from source rocks
Published: 2022-11-12
Subjects: Physical Sciences and Mathematics
The current model for oil expulsion occurring at 120-150°C by anhydrous pyrolysis is not consistent with either analyses of the total organic carbon (TOC) content of subsurface source rocks or the chemical attributes of shallow oils. New data from North Sea Upper Jurassic source-rock samples show no decline in TOC between 120 and 150°C, which is a key prediction by the current model for oil [...]
Weak precipitation δ2H response to large Holocene hydroclimate changes in eastern North America
Published: 2022-11-11
Subjects: Physical Sciences and Mathematics
In eastern North America, annual precipitation increased by >40% over the Holocene, largely in response to melting of the Laurentide Ice Sheet. The change substantially raised lake levels and transformed conifer-dominated ecosystems into mesic deciduous forests. δ2H values of terrestrially derived leaf-wax n-alkanes can facilitate diagnoses of the climate dynamics involved by reconstructing δ2H [...]
A new automated method for improving georeferencing of nighttime ECOSTRESS thermal imagery
Published: 2022-11-11
Subjects: Earth Sciences
Georeferencing accuracy plays a crucial role in providing high-quality ready-to-use remote sensing data. Georeferencing of satellite imagery is typically based on position and pointing direction of a sensor, which are provided by star trackers and GPS. As the Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) is not equipped with star trackers, georeferencing of its [...]
The relationship between sea surface temperature anomalies, wind and translation speed and North Atlantic tropical cyclone rainfall over ocean and land.
Published: 2022-11-10
Subjects: Physical Sciences and Mathematics
There have been increasing losses from freshwater flooding associated with United States (US) landfalling hurricanes in recent years. This study analyses the relationship between sea surface temperature anomalies (SSTA), wind and translation speed and North Atlantic tropical cyclone precipitation (TCP) for the period 1998-2017. For a 1degree C SST increase in the main development region (MDR), [...]
The unknown fate of macroplastic in mountain rivers
Published: 2022-11-09
Subjects: Earth Sciences, Environmental Indicators and Impact Assessment, Environmental Monitoring, Geology, Geomorphology, Hydrology, Life Sciences, Natural Resources and Conservation, Sedimentology, Stratigraphy, Sustainability, Terrestrial and Aquatic Ecology, Water Resource Management
Mountain rivers are typically seen as relatively pristine ecosystems, supporting numerous goods (e.g., water resources) for human populations living not only in the mountain regions but also downstream from them. Recent evidence suggests, however, that mountain river valleys in populated areas can be substantially polluted by macroplastic (plastic item > 5 mm). It is, however, unknown how [...]
Revisiting earlier predictions of glacier retreat: The case of Langfjordjøkelen
Published: 2022-11-09
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics
European glaciers constitute a part of the climate system that is bound to greatly change in the course of the 21st century. Recent length-change observations from Langfjordjøkelen in northern Norway confirm the earlier predictions of Charalampidis (2012), who identified the glacier’s disequilibrium with climate and hence extensive committed ice loss in the 21st century. Simulations suggest that, [...]
Seismic Architecture of the Lithosphere-Asthenosphere System in the Western United States from a Joint Inversion of Body- and Surface-wave Observations: Distribution of Partial Melt in the Upper Mantle
Published: 2022-11-08
Subjects: Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics
Quantitative evaluation of the physical state of the upper mantle, including mapping temperature variations and the possible distribution of partial melt, requires accurately characterizing absolute seismic velocities near seismic discontinuities. We present a joint inversion for absolute but discontinuous models of shear-wave velocity (Vs) using 4 types of data: Rayleigh wave phases velocities, [...]