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Showing 10101 to 10150 of 22070 works
Modelling of Flood Inundation due to Levee Breaches: Sensitivity of Flood Inundation against Breach Process Parameters
This paper analyses the sensitivity of flood inundation due to levee breach against breach model parameters. A parametric levee breach model integrated into the 2D hydrodynamic nu…
Structure and thermal evolution of exoplanetary cores
Most of the large terrestrial bodies in the solar system display evidence of past and/or current magnetic activity, which is thought to be driven by thermo-chemical convection in …
Evaluation of cloud and precipitation simulations in CAM6 and AM4 using observations over the Southern Ocean
This study uses cloud and radiative properties collected from in-situ and remote sensing instruments during two coordinated campaigns over the Southern Ocean between Tasmania and …
Plasma density and magnetic field fluctuations in the ion gyro-frequency range near the diamagnetic cavity of comet 67P
We report the detection of large-amplitude, quasi-harmonic density fluctuations with associated magnetic field oscillations in the region surrounding the diamagnetic cavity of com…
Quantifying dynamic water storage in unsaturated bedrock with borehole nuclear magnetic resonance
Quantifying the volume of water that is stored in the subsurface is critical to studies of water availability to ecosystems, slope stability, and water-rock interactions. In a var…
Physics-based simulation of spatiotemporal patterns of earthquakes in the Corinth Gulf fault system
The potentiality of an improved physics-based earthquake simulation algorithm for modelling the long-term spatiotemporal process of strong earthquakes preparation is explored. The…
Large amplitude electrostatic proton plasma frequency waves in the magnetospheric separatrix and outflow regions during…
We report Magnetospheric Multiscale observations of large amplitude, parallel, electrostatic, proton plasma frequency waves on the magnetospheric side of the reconnecting magnetop…
Improved SAR feature fusion with convolutional neural networks and moment methods
Synthetic aperture radar (SAR) is an important means of obtaining battlefield information. Correct identification of SAR images is essential. Hence, we propose a new method of SAR…
The GFDL Global Atmospheric Chemistry-Climate Model AM4.1: Model Description and Simulation Characteristics
We describe the baseline model configuration and simulation characteristics of GFDL’s Atmosphere Model version 4.1 (AM4.1), which builds on developments at GFDL over 2013–2018 for…
Experiments on the sideward deflection of bedload particles
Bedrock river lateral erosion plays a crucial role in landscape evolution, sediment transport and deposition, and the occurrence of geohazards. Lateral erosion is driven by the im…
The Effect of COVID-19 on AGU Journal Authors by Gender and Geographical Location
When the COVID-19 pandemic forced institutions to close their physical spaces, many researchers and professors were required to work from home. Media outlets and individuals wonde…
Near-Continuous Monitoring of a Coastal Salt Marsh Margin: Implications to Predicting Marsh Edge Erosion
Mechanisms that control marsh edge erosion include wind-generated waves, vegetation, mudflats, anthropogenic factors, and geotechnical properties of sediments. However, existing m…
GROOPS: A software toolkit for gravity field recovery and GNSS processing
The Gravity Recovery Object Oriented Programming System (GROOPS) is a software toolkit written in C++ that enables the user to perform core geodetic tasks. Key features of the sof…
Role of drainage timing on mitigating methane emissions from rice paddy fields
Rice fields are important contributors to the global methane budget. While rice production must increase to meet the demand from a growing population, there is a need to mitigate …
Large wildfires in western US exacerbated by tropospheric drying linked to a multi-decadal trend in the expansion of th…
Analyses of wildfire-climate relationships over North America were conducted using diverse data including ground-based measurements, satellite retrievals, and re-analyses for the …
Electron Landau Damping of Turbulence in the Terrestrial Magnetosheath Plasma
High-quality measurements of electromagnetic fields and electron velocity distributions by the Magnetospheric Multiscale (MMS) mission in Earth’s magnetosheath present a unique op…
Improving the Reusability of Data and Sample Obtained JAMSTEC's Research Vessels and Submersibles
Japan Agency for Marine-Earth Science and Technology (JAMSTEC) has been disseminated information of data and samples obtained by JAMSTEC’s research vessels and submersibles via so…
Classifying Magnetosheath Jets using MMS - Statistical Properties
Using Magnetospheric Multiscale (MMS) data, we find, classify and analyze transient dynamic pressure enhancements in the magnetosheath (jets) from May 2015 until May 2019. A class…
Numerical simulations of meanders migrating laterally as they incise into bedrock
The problem of meandering in mixed bedrock-alluvial rivers is more challenging than that of purely alluvial streams, in that alluvial, bed incisional and bank incisional morphodyn…
Lateral change of in-plate stress and seismicity along the southern Mariana trench
Lithospheric flexure at subduction zones is a major contributor to induce outer rise earthquakes. Here, we modeled the bending deformation of the subducting plate at the southern …
Simulation of topography effects on rockfall-generated seismic signals: application to Piton de la Fournaise volcano
Seismic waves generated by rockfalls contain valuable information on the properties of these events. However, as rockfalls mainly occur in mountainous regions, the generated seism…
Enhanced vertical mixing in coastal upwelling systems driven by diurnal-inertial resonance: numerical experiments
The land-sea breeze is resonant with the inertial response of the ocean at the critical latitude of 30°N/S. 1D-vertical numerical experiments were undertaken to study the key driv…
Understanding Spacecraft Trajectories through Detached Magnetotail Interchange Heads
The kinetic ballooning/interchange instability (BICI) was recently found to produce azimutally narrow interchange heads extending into the dipole region from a reversed radial gra…
Thermospheric Impact on the Magnetosphere through Ionospheric Outflow
We have taken a key step in evaluating the importance of ionospheric outflows relative to electrodynamic coupling in the thermosphere’s impact on geospace dynamics. We isolated th…
Enhanced coastal shoreline modelling using an Ensemble Kalman Filter to include non-stationarity in future wave climates
A novel approach to improve seasonal to interannual sandy shoreline predictions is presented, whereby model free parameters can vary in time, adjusting to potential non-stationari…
Daily changes of seismic velocities in shallow materials on Mars
Temporal changes of S-wave velocities at shallow depth on Mars are derived using seismic data from the InSight mission. Autocorrelation functions are computed for three-component …
A Conceptual Model of Polar Overturning Circulations
The global ocean overturning circulation carries warm, salty water to high latitudes, both in the Arctic and Antarctic. Interaction with the atmosphere transforms this inflow into…
Extant mat world analog microbes synchronize migration to a diurnal tempo
Animal migrations mark the largest daily movement of biomass on Earth today, but who performed the first diurnal migration? Extant benthic microbial mats inhabiting Lake Huro’s lo…
Estimating the occurrence of geomagnetic activity using the Hilbert-Huang transform and extreme value theory
In this paper extreme value theory (EVT) has been used to estimate the return levels for geomagnetic activity based on the aa index. The aa index is the longest, continuously reco…
Vertical velocity of acoustic wave determined from altitudes of TEC disturbances after a foreshock
We investigate ionospheric disturbances using the total electron content (TEC) data retrieved by the three satellites after the foreshock of the 2011 Tohoku Earthquake on 9 March …
Politically relevant geoengineering scenarios
Geoengineering, the deliberate modification of the climate system, is a proposed set of techniques to counter some of the effects of Anthropogenic Global Warming (AGW; Shepherd, 2…
Surface Inorganic Iodine Speciation in the Indian and Southern Oceans from 12o N to 70o S
Marine iodine speciation has emerged as a potential tracer of primary productivity, sedimentary inputs, and ocean oxygenation. The reaction of iodide with ozone at the sea surface…
Neogene Restoration of Geometry of the Neotethyan suture zone in Central Anatolia (Turkey)
The demise and closure of the Neotethyan Ocean gave way to the collision and finally amalgamation of various continental fragments in Turkey along the Izmir-Ankara-Erzincan and In…
Fluctuations of the Atlantic North Equatorial Undercurrent and associated changes in oxygen transports
Although the core velocity of the Atlantic North Equatorial Undercurrent (NEUC) is low (0.1-0.3ms) it has been suggested to act as an important oxygen supply route towards the oxy…
Bath's law, correlations and magnitude distributions
The empirical Bath’s law is derived from the statistical distribution in magnitude difference of pairs of earthquakes. It is shown that earthquake correlations can be expressed by…
Typhoon parameter sensitivity of storm surge in the semi-enclosed Tokyo Bay
In this study, a storm surge model of the semi-enclosed Tokyo Bay was constructed to investigate its hydrodynamic response to major typhoon parameters, such as the point of landfa…
Transport Mechanisms and Persistence of Wildfire-related Polycyclic Aromatic Hydrocarbons in a Southern California Coas…
As wildfires become more prevalent and destructive, it is imperative to understand the impacts they have on the watersheds they burn. One particularly understudied aspect of wildf…
Effect of Pressure Rate on Rate and State Frictional Slip
This paper analyzes the effects of pore pressure rate for a spring - block system that is a simple model of a laboratory experiment. Pore pressure is increased at a constant rate …
ROBUST METRICS OF CONNECTIVITY
Connectivity of material constituents govern the transport, mechanical, chemical, thermal, and electromagnetic properties. Energy storage, recovery and conversion depends on conne…
Using non-diagonal data covariances in geophysical inversion
We present a new approach that allows for the inversion of quantities derived from the observed data using non-diagonal data covariance matrices. For example, we can invert approx…
Mapping artisanal and small-scale gold mining in Senegal using Sentinel-2 data
Artisanal and small-scale gold mining (ASGM) represents a significant economic activity for communities in developing countries. In south-eastern Senegal, this activity has increa…
Seasonal and hemispheric asymmetries in the cold ion outflow source region: Swarm and CHAMP observations of F-region po…
One of the primary mechanisms of loss of Earth’s atmosphere is the persistent “cold” (T ≲ 20 eV) ion outflow that has been observed in the magnetospheric lobes over large volumes …
Mechanical Implications of Creep and Partial Coupling on the World's Fastest Slipping Low-angle Normal Fault in Southea…
We use densely spaced campaign GPS observations and laboratory friction experiments on fault rocks from one of the world’s most rapidly slipping low-angle normal faults, the Mai’i…
Transferring hydrologic data across continents -- leveraging US data to improve hydrologic prediction in other countries
There is a drastic geographic imbalance in available global streamflow gauge and catchment property data, with additional large variations in data characteristics, so that models …
Multi-domain thermal imaging for characterizing groundwater upwelling in stream valleys
Wetlands are extremely dynamical systems and their behavior depends on the characteristics of the surroundings (topography, geology and vegetation, among others) as well as on met…
Uncertainty in Seasonal Runoff Forecasts Affects Water Management Decisions
Heterogeneous snow accumulation in the mountains introduces uncertainty to water-supply forecasting in much of the world. Water managers’ awareness of the challenge may account fo…
Enabling Smart Dynamical Downscaling of Extreme Precipitation Events with Machine Learning
The projection of extreme convective precipitation by global climate models (GCM) exhibits significant uncertainty due to coarse resolutions. Direct dynamical downscaling (DDD) of…
Are narrow spatial aftershock zones specific to fluid-induced earthquakes?
Aftershock cascades play an important role in forecasting seismicity in natural and human-made situations. While their behavior including the spatial aftershock zone has been the …
Sea State and Boundary Layer Stability Limit Sea Spray Aerosol Lifetime over the Southern Ocean
A data set of concurrent measurements of sea spray aerosol concentration, wind speed, sea state, and air and water temperature was acquired across all sectors of the Southern Ocea…
Accelerated ocean acidification in the Tsugaru Strait by an intensified Tsugaru Warm Current
The oceanic uptake of anthropogenic CO 2 has resulted in acidification in surface and subsurface waters throughout the global ocean. We initiated acidification monitoring in the e…
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