Preprints
There are 6976 Preprints listed.
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 [...]
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 [...]
A systematic review of the state of knowledge on environment and the Belt and Road Initiative
Published: 2022-11-21
Subjects: Social and Behavioral Sciences
The Belt and Road Initiative (BRI) is a China-led global initiative that was officially launched in 2013. The wealth of research available on the BRI has been subject to few comprehensive reviews to date, reviews including both English and Chinese language research are even rarer still. In addition, many of the projects associated with the BRI involve infrastructure development, power generation [...]
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 [...]
Community recommendations for geochemical data, services and analytical capabilities in the 21st century
Published: 2022-11-17
Subjects: Biogeochemistry, Cosmochemistry, Earth Sciences, Geochemistry
The majority of geochemical and cosmochemical research is based upon observations and, in particular, upon the acquisition, processing and interpretation of analytical data from physical samples. The exponential increase in volumes and rates of data acquisition over the last century, combined with advances in instruments, analytical methods and an increasing variety of data types analysed, has [...]
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 [...]
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, [...]
Contemporary and historical detection of small lakes using cross-sensor super resolution Landsat imagery
Published: 2022-11-17
Subjects: Artificial Intelligence and Robotics, Environmental Monitoring, Hydrology
Landsat is the longest-running environmental satellite program and has been used for surface water mapping of large water bodies since its launch in 1972. Remote sensing image resolution is increasingly being enhanced through single image super resolution (SR), a machine learning task typically performed by neural networks. Here, we show that a 10x SR model (Enhanced Super Resolution GAN, or [...]
Positive Matrix Factorization of Large Aerosol Mass Spectrometry Datasets Using Error-Weighted Randomized Hierarchical Alternating Least Squares
Published: 2022-11-17
Subjects: Physical Sciences and Mathematics
Weighted positive matrix factorization (PMF) has been used by scientists to find small sets of underlying factors in environmental data. However, as the size of the data has grown, increasing computational costs have made it impractical to use traditional methods for this factorization. In this paper, we present a new weighting method to dramatically decrease computational costs for these [...]
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 [...]
A Systematic Review of Deep Learning Applications in Interpolation and Extrapolation of Precipitation Data
Published: 2022-11-17
Subjects: Earth Sciences, Hydrology, Meteorology
With technological enhancements, the volume, velocity, and variety (3Vs) of the raw digital Earth data have increased in recent years. Due to the increased availability of computer resources and the growing popularity of deep learning applications, this data has been a crucial source for data-driven studies that have transformed the fields of climate and earth science. One of the critical data [...]
Disentangling the effects of climate change and reoligotrophication on primary production in a large lake
Published: 2022-11-17
Subjects: Earth Sciences, Ecology and Evolutionary Biology, Environmental Sciences
Climate change and reduction in nutrient loads have significant effects on primary production and phytoplankton growth dynamics. Since in the last few decades in many regions, nutrients in lakes were reduced simultaneously as the climate changed. Yet, it remains unclear which of the two has impacted primary production the most. In this study, we couple the General Ocean Turbulence Model with the [...]
Call for collaboration: Benchmark datasets for landslide susceptibility zonation
Published: 2022-11-23
Subjects: Physical Sciences and Mathematics
Landslide susceptibility, the spatial likelihood of occurrence of landslides in a specific geographical area, is the subject of countless scientific publications. Different authors use heterogeneous data, and apply many different methods, mostly falling under the definition of statistical and/or machine learning approaches, with the common feature of considering many input variables and a single [...]