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Showing 10401 to 10450 of 22070 works
Sustained washover fan accretion in the absence of large storms suggests inherent changes to island overwash resistance…
Barrier island overwash occurs when the elevation of wave runup exceeds the dune crest and induces landward transport of sediment across a barrier island and deposition of a washo…
Deep Sensing of Transient Electrokinetic Response of Aquifer-Aquitard System to Pumping
We consider the transient electrokinetic response of an aquifer-aquitard system to groundwater abstraction from the aquifer. The system was instrumented with 18 non-polarizable co…
The Disproportionate Role of Ocean Topography on the Upwelling of Carbon in the Southern Ocean
The physical circulation of the Southern Ocean sets the surface concentration and thus air-sea exchange of CO2. However, we have a limited understanding of the three-dimensional c…
Insights into the origin and deformation style of the continental Moho: a case-study from the Western Alps (Italy)
Several hypotheses about origin of the continental Moho are still debated, suggesting its multi-genetic origin. Here, we present quantitative estimation of the seismic properties …
Spatial Variations of Upper Crustal Anisotropy along the San Jacinto Fault Zone in Southern California: Constraints fro…
To discern spatial and explore possible existence of temporal variations of upper crustal anisotropy in an ~15 km section of the San Jacinto Fault Zone (SJFZ) that is composed of …
Mantle Phase Change Detection from Stochastic Tomography
Peaks are observed in a depth dependent power spectrum of P-wave velocity fluctuations determined from an inversion of P wave coherences observed by the USArray. These peaks corre…
Investigating the Dynamics of Hothouse Earth Climates with a Simplified GCM
There are records of past Earth climates that were ice-free all the way to the poles (Barron 1983), which can be described as “hothouse” climates. These hothouse climates can be c…
Plummeting air pollution and CO2 emissions during the COVID-19 pandemic: Lesson learned and future equity concerns of p…
The COVID-19 pandemic lockdowns and quarantines have led to significant industrial slowdowns among the world's major emitters of air pollutants, with resulting decreases to air po…
Precipitating Solar Wind Hydrogen at Mars: Improved Calculations of the Backscatter and Albedo with MAVEN Observations
Outside the Martian bow shock, charge exchange between solar wind protons and exospheric hydrogen produces energetic neutral atoms (ENAs) that travel towards Mars at the solar win…
Systematic Analysis of Convection for OTREC and PREDICT
The systematic analysis of convection and the environment is performed for two field projects, OTREC and PREDICT by implementing 3DVAR on drospondes data sets. Vertically integrat…
Tsunami Efficiency due to Very Slow Earthquakes
Often, tsunamis have been treated as a static problem. First studies demonstrated that for earthquake rupture velocities in the span of 1.5 km/s to 3 km/s, the kinematic and stati…
Past climate variations recorded in needle-like aragonites correlate with organic carbon burial efficiency as revealed …
The drivers of the efficiency in organic carbon (OC) burial are still poorly understood despite their key role in reliable projections of future climate trends. Here we shed new l…
Three-dimensional acoustic imaging of the temporal evolution of internal wave fields in the Gulf of Mexico
We report the observation of internal wave fields evolving at the continental slope in the northern Gulf of Mexico using oil-industry three-dimensional (3D) seismic imaging techni…
Multi-year isoscapes of lake water balances across a dynamic northern freshwater delta
Sustainable approaches are needed to track status and trends of lake water balances in complex, remote freshwater landscapes. Here we use water isotope composition measured at ~60…
Integration of ALOS PALSAR and Landsat-7 ETM+ data for buried lineaments extraction at the Farafra Oasis, Egypt
In the last few years, ALOS/PALSAR (L-band) (HH, HV, VH and VV) images have been widely used due toits ability to penetrate the surface in certain conditions for example of low mo…
A Nonlinear System Science Approach to Find the Robust Solar Wind Drivers of the Multivariate Magnetosphere
We propose a method, based on Neural Networks, that detects the nonlinear robust interplanetary solar wind variables, with varying delays, driving the coupled behavior of three ge…
Plasma Double Layers at the Boundary between Venus and the Solar Wind
The solar wind is slowed, deflected, and heated as it encounters Venus's induced magnetosphere. The importance of kinetic plasma processes to these interactions has not been exami…
The Shear Deformation Zone and the Smoothing of Faults with Displacement
We use high-resolution earthquake locations to characterize the three-dimensional structure of active faults and how it evolves with fault structural maturity. We investigate the …
Power Beaming Leakage Radiation as a Technosignature Observable
The most observable leakage radiation from an advanced civilization may well be from the use of power beaming to transfer energy and accelerate spacecraft. Applications suggested …
Earthquake Sequence Dynamics at the Interface Between an Elastic Layer and Underlying Half-Space in Antiplane Shear
We quantify sliding stability and rupture styles for a horizontal interface between an elastic layer and stiffer elastic half-space with a free surface on top and rate-and-state f…
Assessing the impact of Corona-virus-19 on nitrogen dioxide levels over southern Ontario, Canada
A lockdown was implemented in Canada mid-March 2020 to limit the spread of COVID-19. In the wake of this, declines in nitrogen dioxide (NO2) were observed from the Tropospheric Mo…
Hydromechanical Modeling of Nonplanar Three-Dimensional Fracture Propagation Using an Iteratively Coupled Approach
Accurate numerical modeling of fracture propagation and deflection in porous media is important in the development of geo-resources. To this end, we propose a novel modeling frame…
Distribution of interseismic coupling along the North and East Anatolian Faults inferred from InSAR and GPS data
The North Anatolian Fault (NAF) has produced numerous major earthquakes. After decades of quiescence, the Mw 6.8 Elazig earthquake (January 24, 2020) has recently reminded us that…
Projected Future Changes in Tropical Cyclones using the CMIP6 HighResMIP Multi-model Ensemble
Future changes in tropical cyclone properties are an important component of climate change impacts and risk for many tropical and mid-latitude countries. In this study we assess t…
Winter atmospheric nutrients and pollutants deposition on West Sayan mountain lakes (Siberia)
The world map of anthropogenic atmospheric nitrogen deposition and its effects on natural ecosystems is not described with equal precision everywhere. In this paper, we report atm…
Antarctic Circumpolar Current transport through Drake Passage: What can we learn from comparing high-resolution model r…
Uncertainty exists in the time-mean total transport of the Antarctic Circumpolar Current (ACC), the world’s strongest ocean current. The two most recent observational programs in …
Assessment of ICESat-2 sea ice surface classification with Sentinel-2 imagery: implications for freeboard and new estim…
NASA’s Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) mission launched in September 2018 and is now providing high-resolution surface elevation profiling across the entire …
Integration of MGS TES FFSM eddies and MOC-observed dust storms, MY 24--26
Mars Global Surveyor (MGS) orbiter observed a planet-encircling dust storm (PDS) in Mars year (MY) 25 from Ls=176.2-263.4°. We present an examination of Mars Orbiter Camera (MOC) …
A Parameter Space Approach to Understanding Convective Storm Morphology.
Deep convective storms assume many intensities, sizes and morphologies in Earth’s atmosphere, reflecting varying balances of the competing forces that arise in the diverse atmosph…
Determining the controls on faecal stanol concentrations and ratios in tropical lake sediments
Faecal stanols offer an exciting opportunity to determine population change in the past but the controls of their concentrations and ratios within lake sediments are not well unde…
Benefit of a second calibration phase to estimate the relative global and regional mean sea level drifts between Jason-…
The originality of this study is to propose a new calibration method based on two calibration phases between Jason-3 and Sentinel-6A (S6A) to better estimate the relative global a…
Improving the Representation of Hydrological Processes by the Multi-dimensional Modeling Approach
Watershed hydrological processes controlled by subsurface structures that have hierarchical organization across scales, but there is a lack in multiscale model validation. In this…
Balloon-borne observations of short vertical wavelength gravity waves and interaction with QBO winds
The quasi-biennial oscillation (QBO), a ubiquitous feature of the zonal mean zonal winds in the equatorial lower stratosphere, is forced by selective dissipation of atmospheric wa…
Meteorological tsunami generation due to sea-surface pressure change: Three-dimensional theory and synthetics of ocean-…
Although most tsunamis are generated by the sea-bottom deformation caused by earthquakes, some tsunamis are excited by sea-surface pressure changes. This study theoretically inves…
Plain-scale sustained changes in well water levels following a large earthquake: possible evidence of permeability decr…
Observation of earthquake-induced changes in well water levels provides an opportunity to study the effects of seismic activity on the groundwater system. In this study, we used d…
The ATMODAT Standard enhances FAIRness of Atmospheric Model data
Within the AtMoDat project (Atmospheric Model Data, www.atmodat.de), a standard has been developed which is meant for improving the FAIRness of atmospheric model data published in…
Increased dust aerosols in the high troposphere over the Tibetan Plateau from 1990s to 2000s
The dust aerosols are a major type of aerosol over the Tibetan Plateau (TP) and influence climate at local to regional scales through their effects on thermal radiation and snow-a…
A 3D Full Stress Tensor Model for Oklahoma
The stress tensor is an important property for upper crustal studies such as those that involve pore fluids and earthquake hazards. At tectonic plate scale, plate boundary forces …
The Resilience of Habitable Climates Around Circumbinary Stars
Here we use a 3-D climate system model to study the habitability of Earth-like planets orbiting in circumbinary systems. A circumbinary system is one where a planet orbits around …
Mechanisms of estuarine salt plug formation by an along-shelf buoyant current: a numerical model approach
While estuarine salt plugs can develop worldwide in estuaries adjacent to buoyant coastal currents, their formation has been scarcely documented. This study aims to generalize a m…
Quasi-10-day wave and semi-diurnal tide nonlinear interactions during the southern hemispheric SSW 2019 observed in the…
Mesospheric winds from three longitudinal sectors at about 65$^\circ$N and 54$^\circ$N latitude are combined to diagnose the zonal wavenumbers ($m$) of high-frequency-resolved spe…
Copula autoregressive methodology for multi-lag,multi-site simulation of rainfall
This work presents a methodology for the synthetic generation of rainfall time series based on the copula autoregressive methodology with multiple lags and for multiple sites. In …
Field-Aligned Currents in Auroral Vortices
Auroral bright spots have been observed at Earth, Jupiter, and Saturn in regions that map to the boundary layer. It has been suggested that the bright spots are associated with Ke…
Observability-based sensor placement improves contaminant tracing in river networks
This study presents a new methodology for identifying near-optimal sensor locations for contaminant source tracing in river networks. To establish a physical basis for the problem…
BURST GEOMAGNETIC PULSATIONS AS INDICATORS OF SUBSTORM EXPANSION ONSETS DURING SUPERSTORMS
We report on the dynamics of field-aligned currents (FACs), broadband geomagnetic pulsations, and airglow obtained from the Irkutsk (IRK), Mondy (MND), and Borok (BOX) midlatitude…
Injection-induced earthquakes on complex fault zones of the Raton Basin illuminated by machine-learning phase picker an…
Seismicity in the Raton Basin over the past two decades suggests reactivation of basement faults due to wastewater injection. In the summer of 2018, 96 short-period three-componen…
Climate Impacts of COVID-19 Induced Emission Changes
The COVID19 pandemic led to dramatic changes in economic activity in 2020. We use estimates of emissions changes for 2020 in two Earth System Models (ESMs) to simulate the impacts…
Unfolding the relationship between seasonal forecasts skill and value in hydropower production: A global analysis
The potential benefits of seasonal streamflow forecasts for the hydropower sector have been evaluated for several basins across the world, but with contrasting conclusions on expe…
Equatorial waves, diurnal tides and small-scale thermal variability in the tropical lower stratosphere from COSMIC-2 ra…
A new constellation of radio occultation satellites called COSMIC-2 (Constellation Observing System for Meteorology, Ionosphere and Climate-2) is providing unprecedented dense mea…
Power Spectral Density Background Estimate and Signal Detection via the Multitaper Method.
We present a new spectral analysis method for the identification of periodic signals in geophysical time series. We evaluate the power spectral density with the adaptive multitape…
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