Preprints
There are 5976 Preprints listed.
Marketing Aspects for IMACS
Published: 2024-06-10
Subjects: Physical Sciences and Mathematics
A series of papers was pre-printed explaining the prior published patent application for a first-principals-based sustainability measurement system. In addition to measuring environmental and human condition impacts, the Impact Measurement And Conservation System (IMACS) automatically applies conservation to participating products sold by participating retailers and purchased by participating [...]
Majority of potable water microplastics are smaller than the 20 µm EU methodology limit for consumable water quality
Published: 2024-06-08
Subjects: Medicine and Health Sciences, Physical Sciences and Mathematics
Microplastic (MP) content in nutrition including potable water is unregulated, although MP concentrations in bottled water can diverge by several orders of magnitude. The EU Directive 2020/2184 on consumable water quality recently proposed methodological approaches to the detection of MPs in potable water in the size range of 20-5000 µm. However, small MPs in the 1-20 µm range are far more likely [...]
Theoretical infrared signature of OH defects in Fe3+, Cr3+ and Al3+-doped enstatite
Published: 2024-06-08
Subjects: Mineral Physics
The infrared spectroscopic properties of selected defects involving one proton and one nearby M3+ (M=Al, Cr, Fe) substitution in orthoenstatite are investigated by first- principles calculations. Based on the theoretical results, the absorption bands experimentally observed on synthetic samples with high crystalline quality and low doping levels can be assigned to specific defect configurations. [...]
Taxon-specific hydrogen isotope signals in cultures and mesocosms facilitate ecosystem and hydroclimate reconstruction
Published: 2024-06-07
Subjects: Biogeochemistry
Phytoplankton play a key role in biogeochemical cycles, impacting atmospheric and aquatic chemistry, food webs, and water quality. However, it remains challenging to reconstruct changes in algal community composition throughout the geologic past, as existing proxies are suitable only for a subset of taxa and/or influenced by degradation. Here, we investigate if compound-specific hydrogen [...]
Investigating the Dynamic History of a Promontory Ice Rise using Radar Data
Published: 2024-06-07
Subjects: Geophysics and Seismology, Glaciology
Ice rises hold valuable records revealing the ice dynamics and climatic history of Antarctic coastal areas from the Last Glacial Maximum to today. This history is often reconstructed from isochrone radar stratigraphy and simulations focusing on Raymond arch evolution beneath the divides. However, this relies on complex ice-flow models where many parameters are unconstrained by observations. Our [...]
Multicomponent and multiphase CO2-brine system in microfluidic characterised in situ by Raman spectroscopy
Published: 2024-06-07
Subjects: Chemical Engineering, Complex Fluids, Mining Engineering, Petroleum Engineering
Deep-saline aquifers could be instrumental in the geological storage of carbon dioxide due to their relatively good reservoir properties, high volume, and prevalence. However, there are a few difficulties which should be overcome to obtain effective stores in such reservoirs. Most problems are related to formation damage caused by salt precipitation. Due to the complexity of such systems, it is [...]
Global emergence of regional heatwave hotspots outpaces climate model projections
Published: 2024-06-06
Subjects: Physical Sciences and Mathematics
Multiple recent record shattering weather events raise questions about the adequacy of climate models to effectively predict and prepare for unprecedented climate impacts on human life, infrastructure, and ecosystems. Here we show that extreme heat in several regions globally is increasing significantly and faster in magnitude than what state-of-the-art climate models have predicted under present [...]
Do large earthquakes start with a precursory phase of slow slip?
Published: 2024-06-06
Subjects: Geophysics and Seismology
In a recent publication, we showed that a stack of all GPS time series recorded before Magnitude ≥ 7.0 earthquakes suggests that large earthquakes start with a precursory phase of accelerating slow slip (Bletery and Nocquet, 2023). While no peer-reviewed comment or publication has formally contradicted this result, informal discussion has emerged on various platforms. We present here the [...]
A myriad of melt inclusions: a 3D view into the volcanic time capsules of Colli Albani Volcano (Italy)
Published: 2024-06-06
Subjects: Geology, Volcanology
Melt inclusions are small parcels of magma trapped in crystals, which hold key information about pre-eruptive magmatic conditions including volatile content and melt chemistry. We focus here on melt inclusions for a nuanced view of the magmatic pre-eruptive state of Colli Albani, a mafic-alkaline ignimbrite forming system in central Italy. Recent years have seen an increased amount of research [...]
Integrating Conversational AI Agents for Enhanced Water Quality Analytics: Development of a Novel Data Expert System
Published: 2024-06-01
Subjects: Artificial Intelligence and Robotics, Civil Engineering, Databases and Information Systems, Environmental Engineering, Hydrology, Software Engineering
Despite advancements in environmental monitoring, the gap between data collection and user-friendly data interpretation remains a significant challenge, especially in the domain of water quality management. This paper introduces the Artificial Intelligence Data Expert (AI-DE), a novel data analytics system that is designed to facilitate on-demand analysis of time-series sensor data related to [...]
Ensemble Kalman, Adaptive Gaussian Mixture, and Particle Flow Filters for Optimized Earthquake Forecasting
Published: 2024-06-01
Subjects: Dynamical Systems, Geophysics and Seismology, Other Statistics and Probability
Probabilistic forecasts are regarded as the highest achievable goal when predicting earthquakes, but limited information on stress, strength, and governing parameters of the seismogenic sources affects their accuracy. Ensemble data-assimilation methods, such as the Ensemble Kalman Filter (EnKF), estimate these variables by combining physics-based models and observations.While the EnKF has [...]
Mitigating marine plastic debris in Hong Kong: an action plan
Published: 2024-05-31
Subjects: Environmental Sciences, Other Environmental Sciences, Other Physical Sciences and Mathematics
The impact of marine debris ranges from ecological and social to economic, including ingestion by wildlife, loss of tourist potential and high costs of clean-ups and reallocation of collected litter. In Hong Kong, an astounding amount of litter is collected annually, encompassing plastic food packaging, bottles and bottle caps. With over 60% of discarded items originating from shoreline [...]
Technological Trends in The Field of Hydrology and Environmental Sciences: A Bibliometric Analysis
Published: 2024-05-31
Subjects: Civil Engineering, Computational Engineering, Education, Engineering, Environmental Engineering
The rapid advancement and widespread adoption of technology, particularly in web applications and artificial intelligence, have significantly impacted various sectors, including industry, social media, government, and research. This surge in technological utilization has played a pivotal role in the evolution of hydrogeological and environmental sciences, empowering researchers to harness [...]
Linking petrographic and geochemical indicators of melt reactions in pelitic migmatites and leucogranites
Published: 2024-05-31
Subjects: Earth Sciences
Anatexis in orogenic systems has wide-reaching implications for the structure, mechanical strength, and later exhumation of the middle crust during orogeny. Previous studies of melt reactions in metapelitic rocks have identified three major melt-producing reactions: fluid-present incongruent melting, fluid-absent muscovite dehydration melting, and fluid-absent biotite dehydration melting. Due to [...]
Assessment of RCA4, CORDEX Africa domains RCMs Performance in Simulating Rainfall and Temperature: A case of Gilgal Gibe watershed, Ethiopia
Published: 2024-05-31
Subjects: Engineering Education
Examining the spatiotemporal dynamics of meteorological variables in the context of changing climate, particularly in countries where rainfed agriculture, and hydropower project are predominant, is vital to assess climate-induced change. CORDEX Africa has been developed to forecast Africa's climate variation and variabilities. the RCA4 regional climate model performance of CORDEX Africa domains [...]