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Showing 51 to 100 of 5157 works
Policy Bridge: Air Quality Impacts from Oil and Natural Gas Development in Colorado
The rise of hydraulic fracturing techniques has fostered rapid growth of oil and natural gas extraction in areas across the United States. In the Denver-Julesburg Basin (DJB), wh…
Four-dimensional surface motions of the Slumgullion landslide and quantification of hydrometeorological forcing
Landslides modify the natural landscape and cause fatalities and property damage worldwide. Quantifying landslide dynamics is challenging due to the stochastic nature of the envir…
Future heat extremes likely to have been underestimated
In a warming world, temperature extremes are expected to show a distinguishable change over much of the globe1 and in many regions this change has already been detected in observa…
Open Access publishing practice in Geochemistry: current state and look to the future
Open Access (OA) describes the free, unrestricted access to and re-use of research articles. Recently, a new wave of interest, debate, and practice surrounding OA publishing has e…
Marked upwelling and SST drop after the arrival of cyclone Dorian to the Atlantic Canadian coast
In intertidal environments, temperature fluctuations at hourly temporal scales are ecologically relevant because of the physiological stress that organisms must endure as a result…
U-Th dating of lake sediments: Lessons from the 700 kyr sediment record of Lake Junín, Peru
*----- NOTE: This is a peer reviewed preprint of a paper accepted in Quaternary Science Reviews as of June 8, 2020 -----* Deep sediment cores from long-lived lake basins are funda…
Ferruginous oceans during OAE1a and collapse of the marine sulfate pool
Seawater sulfate is one of the largest oxidant pools at Earth’s surface today and its concentration in the oceans is generally assumed to have varied between 5 and 28 mM since the…
The interplay between clay fabric and mechanical response of deep-seated landslides
Deep-seated landslides are amongst the most devastating natural hazards on earth, typically involving a rigid rock mass sliding over a weak, clayey shear-band. The mechanical resp…
Notes on the creation and manipulation of solid solution models
A large class of solid solution models are built on the premise that exchange of chemical species takes place on a finite number of unique sites, and that the thermodynamic proper…
Stronger Atlantic hurricanes: Validating Elsner et al. (2008)
Using satellite derived wind speed estimates from tropical cyclones over the 25-year period 1981--2006, Elsner et al. (2008) showed the strongest tropical cyclones getting stronge…
Estimation of surface and deep flows from sparse SSH observations of geostrophic ocean turbulence using Deep Learning
Satellite altimeters provide global observations of sea surface height (SSH) and present a unique dataset for advancing our theoretical understanding of upper ocean dynamics and m…
A machine learning approach to tungsten prospectivity modelling using knowledge-driven feature extraction and model con…
Novel mineral prospectivity modelling presented here applies knowledge-driven feature extraction to a data-driven machine learning approach for tungsten mineralisation. The method…
An interpreted language implementation of the Vaganov-Shashkin tree-ring proxy system model
We describe the implementation of the Vaganov-Shashkin tree-ring growth model (VSM) in MATLAB. VSM, originally written in Fortran, mimics subdaily and daily resolution processes …
Evaluation and comparison of a machine learning cloud identification algorithm for the SLSTR in polar regions
A Feed Forward Neural Net (NN) approach to distinguish between clouds and the surface has been applied to the Sea and Land Surface Temperature Radiometer in polar regions. The mas…
Climate driven Holocene erosion in central Ukraine
The younger Quaternary erosion history was reconstructed in a catchment close to the Chalcolithic giant settlement Maidanetske, central Ukraine based on dated sediment sequences. …
Scaling Laws for Regional Stratification at the top of Earth’s Core
Seismic and geomagnetic observations have been used to argue both for and against a global stratified layer at the top of Earth’s outer core. Recently, we used numerical models of…
Advanced ML and AI Approaches for Proxy-based Optimization of CO2-Enhanced Oil Recovery in Heterogeneous Clastic Reserv…
Constructing a simpler model to represent a complex reservoir simulation that will be employed to define the optimum future development plans have been achieved through the use of…
Quantifying Computational Efficiency of Adaptive Mesh Refinement for Shallow Water Solvers
Non-uniform, dynamically adaptive meshes are a useful tool for reducing computational complexities for geophysical simulations that exhibit strongly localised features such as is …
Spatiotemporal correlation analysis of noise-derived seismic body waves with ocean wave climate and microseism sources
Seismic signals can be extracted from ambient noise wavefields by the correlation technique. Recently, a prominent P‐type phase was observed from teleseismic noise correlations in…
Dreibrodt et al.- Holocene erosion history in central Ukraine
The younger Quaternary erosion history was reconstructed in a catchment close to the Chalcolithic giant settlement Maidanetske, central Ukraine based on dated sediment sequences. …
No support for carbon storage of >1000 GtC in northern peatlands
Northern peatlands store large amounts of carbon (C) and have played an important role in the global carbon cycle since the Last Glacial Maximum. Most northern peatlands have esta…
Local and remote influences on the heat content of Southern Ocean mode water formation regions.
The Southern Ocean (SO) is a crucial region for the global ocean uptake of heat and carbon. There are large uncertainties in the observations of fluxes of heat and carbon between …
Accelerating numerical wave-propagation using wavefield adapted meshes, Part I: Forward and adjoint modelling
An order of magnitude speed-up in finite-element modelling of wave propagation can be achieved by adapting the mesh to the anticipated space-dependent complexity and smoothness of…
The economic implications of using a truly preindustrial climate baseline
The pervasive impacts of climate change can result in scientific decisions having unforeseen societal implications. To demonstrate this, we explore the global and regional economi…
Bayesian Models for Deriving Biogeochemical Information from Satellite Ocean Color
In this study, we present Bayesian machine learning approaches to predict the spectral phytoplankton absorption coefficient - a proxy of phytoplankton biomass - from top of atmosp…
Optical wave gauging using deep neural networks
We develop a remote wave gauging technique to estimate wave height and period from imagery of waves in the surf zone. In this proof-of-concept study, we apply the same framework t…
Abrupt Arctic Warming Repeatedly Led to Prolonged Drought and Glacial Retreat in the Tropical Andes During the Last Gla…
A sediment core spanning the last ~50 ka from Lake Junín (Peru) in the tropical Andes reveals abrupt climatic events on a centennial-millennial time scale. These events, which in…
Fossil fuel combustion is driving indoor CO2 toward levels harmful to human cognition
Human activities are elevating atmospheric carbon dioxide concentrations to levels unprecedented in human history. The majority of anticipated impacts of anthropogenic CO2 emissio…
A 2,000-year Bayesian NAO reconstruction from the Iberian Peninsula
The North Atlantic Oscillation (NAO) is the major atmospheric mode that controls winter European climate variability because its strength and phase determine regional temperature,…
Wind-driven evolution of the North Pacific subpolar gyre over the last deglaciation
North Pacific atmospheric and oceanic circulations are key missing pieces in our understanding of the reorganisation of the global climate system since the Last Glacial Maximum (L…
Urban Near-surface Seismic Monitoring using Distributed Acoustic Sensing
Urban subsurface monitoring requires high temporal-spatial resolution, low maintenance cost, and minimal intrusion to nearby life. Distributed acoustic sensing (DAS), in contrast …
Effects of off-fault inelasticity on near-fault directivity pulses
Near-fault motion is often dominated by long-period, pulse-like particle velocities with fault-normal polarization that, when enhanced by directivity, may strongly excite mid- to …
Plants as sensors: vegetation response to rainfall predicts subsurface water storage capacity in Mediterranean climates
Methods are lacking to characterize critical zone (CZ) structure at spatial scales relevant to earth system and dynamic global vegetation models. This knowledge gap results in poo…
Effects of groundwater pumping on ground surface temperature: A regional modeling study in the North China Plain
Over-exploitation of groundwater (GW) in the North China Plain (NCP) since the 1960s has many environmental consequences. However, understanding of the dominant mechanisms remains…
A grid for multidimensional and multivariate spatial representation and data processing.
Researchers use 2D and 3D spatial models of multivariate data of differing resolutions and formats. It can be challenging to work with multiple datasets, and it is time consuming …
Simulating Electropulse Fracture of Granitic Rock
Electropulse treatments employ a series of high-voltage discharges to break rock into small fragments. As these methods are particularly suited to fracturing hard brittle rocks, e…
Stratigraphic reservoir compartmentalization: causes, recognition, and implications for the geological storage of carbo…
The impact of carbon capture and storage (CCS) in mitigating anthropogenic emissions of greenhouse gases is potentially great, but its success is strongly dependent on identifying…
Revised timing of Cenozoic Atlantic incursions and changing hinterland sediment sources during southern Patagonian orog…
New detrital zircon U-Pb geochronology data from the Cenozoic Magallanes-Austral Basin in Argentina and Chile ~51°S establish a revised chronostratigraphy of Paleocene – Miocene f…
Quantitatively deciphering paleostrain from digital outcrops model and its application in the eastern Tian Shan, China
The knowledge of the strain/stress field evolution in time is fundamental to the understanding of the earth dynamic system. Based on the principle that past tectonic stress should…
Methane, Monsoons, and Modulation of Millennial-scale Climate
Earths orbital geometry exerts a profound influence on climate by regulating changes in incoming solar radiation. Superimposed on orbitally-paced climate change, Pleistocene recor…
Centroid moment tensor inversions of offshore earthquakes using a three-dimensional velocity structure model: Slip dist…
Due to complex three-dimensional (3D) heterogeneous structures, conventional one-dimensional (1D) analysis techniques using onshore seismograms can yield incorrect estimation of e…
Simultaneous measurement of aqueous redox sensitive elements and their species across soil-water interface
Soil-water interface (SWI) hosts versatile elements speciation and controls elements cycling in flooded lands. However, the study on the element’s interaction along SWI is limited…
Macrophyte cover type and groundwater as the key drivers of the extremely high organic carbon concentration of soda pans
1. Endorheic soda pans are among the aquatic systems that have the highest dissolved organic carbon (DOC) content on the planet with concentrations reaching values close to 1 g L−…
A.I taking over a global climate mapping platform
Note: this is a post-print of a published manuscript in Jurnal Pendidikan IPA Indonesia with DOI 10.15294/jpii.v5i2.7677. This study focuses on the improvement of prospective teac…
How do pre-existing normal faults influence rift geometry? A comparison of adjacent basins with contrasting underlying …
Recent studies of natural, multiphase rifts suggest that the presence of pre‐existing faults may strongly influence fault growth during later rift phases. These findings compare w…
Deep learning to infer eddy heat fluxes from sea surface height patterns of mesoscale turbulence
Oceans play a major role in Earths climate by storing and transporting heat via turbulent currents called mesoscale eddies. However, direct monitoring of eddy-driven heat fluxes i…
Dynamic modelling of overprinted impermeable fault gouges and surrounding damage zones as lower dimensional interfaces
In the modelling of subsurface fluid flow, faults are dominant features since they can act as fluid pathways or barriers. Special emphasis is therefore placed in representing them…
Ultramafic rock carbonation: Constraints from listvenite core BT1B, Oman Drilling Project
The occurrence of the quartz–carbonate alteration assemblage (listvenite) in ophiolites indicates that ultramafic rock represents an effective sink for dissolved CO2. However, the…
The Fate of Carbon during Earth’s Core–Mantle Differentiation
Carbon is an essential element for the existence and evolution of life on Earth, constitutes up to 50% of dry biomass, and is likely a requirement for all life in the universe. It…
Stable and Radioisotope Systematics Reveal Fossil Water as Fundamental Characteristic of Arid Orogenic-Scale Groundwate…
In arid and semi-arid regions, persistent hydrological imbalances illuminate the considerable gaps in our spatiotemporal understanding of fundamental catchment-scale governing mec…
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