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Showing 1051 to 1100 of 5157 works
The effect of surge on riverine flood hazard and impact in deltas globally
Current global riverine flood risk studies assume a constant mean sea level boundary. In reality high sea levels can propagate up a river, impede high river discharge, thus leadin…
Evidence of recurrent mass movement in front of the maximum slip area of the 1960 Chile earthquake: Implications for ri…
We present evidence that suggests a new risk scenario for the Valdivia basin in south Chile, located in the area of the magnitude 9.5 1960 earthquake. In 1960, three mass movement…
Organic carbon and microbial activity in marine sediments on a global scale throughout the Quaternary
Microbial degradation of organic carbon in marine sediments is a key driver of global element cycles on multiple time scales. However, it is not known to what depth microorganisms…
Array-based iterative measurements of SmKS travel times and their constraints on outermost core structure
Vigorous convection in Earths outer core led to the suggestion that it is chemically homogeneous. However, there is increasing seismic evidence for structural complexities close t…
Realistic River Image Synthesis using Deep Generative Adversarial Networks
In this paper, we investigate an application of image generation for river satellite imagery. Specifically, we propose a generative adversarial network (GAN) model capable of gene…
Enabling high-performance cloud computing for Earth science modeling on over a thousand cores: application to the GEOS-…
Cloud computing platforms can facilitate the use of Earth science models by providing immediate access to fully configured software, massive computing power, and large input datas…
Large-scale crustal structure beneath Singapore using receiver functions from a dense urban nodal array
Geophysics has a role to play in the development of smart cities, for example through geohazard mitigation and subsurface imaging for underground construction. This is particularl…
Connecting a broad spectrum of transient slip on the San Andreas fault
Strain accumulated on the deep extension of some faults are episodically released during transient slow-slip events which can subsequently load the shallow seismogenic region. At …
Constraints on mantle viscosity and Laurentide ice sheet evolution from pluvial paleolake shorelines in the western Uni…
The deformation pattern of the paleoshorelines of extinct Lake Bonneville were among the first features to indicate that Earths interior responds viscoelastically to changes in su…
History of on-board equipment improvement for GNSS-A observation with focus on observation frequency
The Global Navigation Satellite System-Acoustic ranging combination technique (GNSS-A) is a seafloor geodetic technique that enables precise global seafloor positioning to detect …
The 2019 MW 5.7 Changning earthquake, Sichuan Basin, China – a shallow doublet with different faulting styles
The increased seismic activity of the last ~10 years in Changning county of Sichuan Province comprised just small (mostly ML < 5.0) injection-induced earthquakes. The MW 5.7 ea…
Did sea-level change cause the switch from fissure-type to central-type volcanism at Mount Etna, Sicily?
One of the most intriguing aspects of the evolution of Mount Etna (eastern Sicily) is the switch from a fissure-type shield volcano coincident with the Ionian coast to an inland c…
Impact of topography on earthquake static slip inversions
Our understanding of earthquakes is limited by our knowledge, and our description, of the physics of the Earth. When solving for subsurface fault slip, it is common practice to as…
Stress Changes on the Garlock fault during and after the 2019 Ridgecrest Earthquake Sequence
The recent 2019 Ridgecrest earthquake sequence in Southern California jostled the seismological community by revealing a complex and cascading foreshock series that culminated in …
Chalcophile elements track the fate of sulfur at Kīlauea Volcano, Hawai’i
Chalcophile element concentrations in melt inclusions and matrix glasses may be used to investigate low pressure degassing processes, as well as sulfide saturation during crustal …
Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw
It has been shown that reactive soil minerals, specifically iron(III) (oxyhydr)oxides, can trap organic carbon in soils overlying intact permafrost, and may limit carbon mobilizat…
Urgent Tsunami Computing
Tsunamis pose a hazard that may strike a coastal population within a short amount of time. To effectively forecast and warn for tsunamis, extremely fast simulations are needed. Ho…
Drivers of Local Ocean Heat Content Variability in ECCOv4
Variation in upper ocean heat content is a critical factor in understanding global climate variability. By using temperature anomaly budgets in a physically consistent ocean state…
The what, how and why of human coprolite analysis in archaeology
Coprolites are a highly informative but still underutilized proxy for understanding past environments, palaeodiets, and ancient human health. Here we provide a critical review of …
Machine learning for digital soil mapping: applications, challenges and suggested solutions
The uptake of machine learning (ML) algorithms in digital soil mapping (DSM) is transforming the way soil scientists produce their maps. Machine learning is currently applied to m…
Comparison of permeability predictions on cemented sandstones with physics-based and machine learning approaches
Permeability prediction has been an important problem since the time of Darcy. Most approaches to solve this problem have used either idealized physical models or empirical relati…
‘Scallywag Bunkers’: Geophysical Investigations of WW2 Auxiliary Unit Operational Bases (OBs) in the UK
In 1940, with the fall of France imminent, Britain prepared for invasion. After Dunkirk, with most armour and transport lost, a defence ‘stop line’ (GHQ Line) was prepared. Local …
Centrifugal and symmetric instability during Ekman adjustment of the bottom boundary layer
Flow along isobaths of a sloping lower boundary generates an across-isobath Ekman transport in the bottom boundary layer. When this Ekman transport is down the slope it causes con…
A new model for fault growth during syn-kinematic deposition
Constraining the mechanisms of fault growth is essential for understanding extensional tectonics. In these dynamic systems the propagation of existing faults through recent syn-ki…
Fault rupture during the December 26, 2018, Mw 4.9 Fleri earthquake (Mt. Etna): surface faulting in a volcano-tectonic …
On December 26, 2018, the largest instrumental earthquake ever recorded in Mt. Etna (Sicily, southern Italy) shook the eastern flank of the volcano, with epicenter near the Fleri …
High-resolution surface velocities and strain for Anatolia from Sentinel-1 InSAR and GNSS data
Measurements of present-day surface deformation are essential for the assessment of long-term seismic hazard. The European Space Agencys Sentinel-1 satellites enable global, high-…
Developing a coral proxy system model to compare coral and climate model estimates of changes in paleo-ENSO variability
Coral records of surface-ocean conditions extend our knowledge of interannual El Niño-Southern Oscillation (ENSO) variability into the pre-instrumental period. That said, the wide…
Base Level Changes based on Basin Filling Modelling: a Case Study from the Paleocene Lishui Sag, East China Sea Basin
Estimation of base level changes in geological records is an important topic for petroleum geologists. Taking the Paleocene Upper Lingfeng Member of Lishui Sag as an example, this…
On the potential of linked-basin tidal power plants: an operational and coastal modelling assessment
Single-basin tidal range power plants have the advantage of predictable energy outputs, but feature non-generation periods in every tidal cycle. Linked-basin tidal power systems c…
A Shallow Water Model for Convective Self-Aggregation
Convective self-aggregation is proposed to be fundamental to the development of tropical cyclones and the Madden-Julian Oscillation, both of which are long-term mysteries in tropi…
Novel insights from Fe-isotopes into the lithological heterogeneity of Ocean Island Basalts and plume-influenced MORBs
The extent of lithological heterogeneity in the Earth’s convecting mantle is highly debated. Whilst the presence of pyroxenite in the mantle source regions of Ocean Island Basalts…
Entangled external and internal controls on submarine fan evolution: an experimental perspective
Submarine fans are formed by sediment-laden flows shed from continental margins into ocean basins. Their morphology represents the interplay of external controls such as tectonics…
Integrating suspended sediment flux in large alluvial river channels: Application of a synoptic Rouse-based model to th…
A large portion of freshwater and sediment is exported to the ocean by a small number of major rivers. Many of these mega-rivers are subject to substantial anthropogenic pressures…
Fate of organic compounds during transformation of ferrihydrite in iron formations
The absence of organic compounds from Precambrian iron formations (IF) challenges the hypothesis of the biogenic origin of IF. Here we address the fate of adsorbed organic compoun…
Monitoring seasonal variations in seismic velocity and groundwater levels in Harvey, Western Australia using borehole a…
In order to explore the relationships between environmental subsurface changes and seismic velocities, we use nearly four years (2015-2018) of continuous ambient seismic noise dat…
Sensitivity Analysis of a Conceptual, Lumped Model Using VARS-TOOL Applied to Western Ghats Catchments of India
The present work considers the application of Variogram Analysis of Response Surfaces Toolbox (VARS-TOOL) to identify the sensitive parameters of a rainfall-runoff model in the Ne…
Avalonia, get bent! Paleomagnetism from SW Iberia confirms the Greater Cantabrian Orocline
The amalgamation of Pangea formed the contorted Variscan-Alleghanian orogen, suturing Gondwana and Laurussia during the Carboniferous. From all swirls of this orogen, a double cur…
High Attenuation Recycled Materials as landfill liners (the HARM project) – A new concept for improved landfill liner d…
A new approach in landfill liner design which combines hydraulic containment of leachate with contaminant attenuation to improve the performance of these environmental control sys…
Event-based contact angle measurements inside porous media using time-resolved micro-computed tomography
Hypothesis Capillary-dominated multiphase flow in porous materials is strongly affected by the pore walls’ wettability. Recent micro-computed tomography (mCT) studies found unexpe…
Suspended-sediment induced stratification inferred from concentration and velocity profile measurements in the lower Ye…
Despite a multitude of models predicting sediment transport dynamics in an open-channel flow, the interaction between fluid and sediment, so to produce self-organized vertical den…
Evaluating the INLA-SPDE approach for Bayesian modeling of earthquake damages from geolocated cluster data
Modeled damage estimates are an important source of information in the hours to weeks following major earthquake disasters, but often lack sufficient spatial resolution for highli…
Variations in the magnetic properties of meteoritic cloudy zone
Iron and stony-iron meteorites form the Widmanstätten pattern during slow cooling. This pattern is comprised of several microstructures whose length-scale, composition and magneti…
Post-critical SsPmp and its Applications to Virtual Deep Seismic Sounding (VDSS)–3: Back-projection Imaging of the Crus…
Virtual Deep Seismic Sounding (VDSS) uses the arrival time of post-critical SsPmp relative to the direct S wave to infer Moho depth at the Pmp reflection point. Due to the large o…
Rainsplash Erosion for Natural Slopes and Rainfall Conditions
Rainsplash is significant for interrill erosion since it facilitates the movement of loosened soil frangments. Because it is a technically dicult process to measure, many studies …
Dynamics of displacement in mixed-wet porous media
We identify a distinct two-phase flow invasion pattern in a mixed-wet porous medium. Time-resolved high-resolution synchrotron X--ray imaging is used to study the invasion of wate…
Dilation of subglacial sediment governs incipient surge motion in glaciers with deformable beds
Glacier surges are quasi-periodic episodes of rapid ice flow that arise from increases in slip-rate at the ice-bed interface. The mechanisms that trigger and sustain surges are no…
Pleistocene - Holocene volcanism at the Karkar geothermal prospect, Armenia
Quaternary volcanic centres north of the Bitlis-Zagros suture in Turkey, Iran and the Caucasus represent both volcanic hazards and potential or actual geothermal energy resources.…
Spatially distributed chaos and turbulence in clouds
Spatially distributed chaos (turbulence) in the cumulus, stratocumulus, stratiform, cirrus and cirrus mammatus clouds have been studied using results of direct numerical simulatio…
serac: a R package for ShortlivEd RAdionuclide Chronology of recent sediment cores
Short-lived radionuclides are measured in surface sediment to provide a geochronology for the past century. Age-depth models can be produced from 210Pbex activity-derived sediment…
Seismic source tracking with six degree-of-freedom ground motion observations
Back azimuth (BAz) information can be determined from combined measurements of rotations and translations at a single site. Such six degree-of-freedom (6-DoF) measurements are rea…
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