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Showing 7651 to 7700 of 59105 works
Tracking the spatio-temporal evolution of foreshocks preceding the Mw 6.3 2009 L'Aquila Earthquake
How faulting processes lead to a large earthquake is a fundamental question in seismology. To better constrain this pre-seismic stage, we create a dense seismic catalog via templa…
Effects of snow and remineralization processes on nutrient distributions in multi-year Antarctic landfast sea ice
We elucidated the effects of snow and remineralization processes on nutrient distributions in multi-year landfast sea ice (fast ice) in Lützow-Holm Bay, East Antarctica. Based on …
Soil aggregates and pore changes under raindrop splash
Raindrop splash engenders the dispersion and transport of the soil particles, that is the primary stage in the process of soil erosion. Raindrops with different diameters may have…
Artificial Floating Island System as a Sustainable Solution for Addressing Nutrient Pollution and Harmful Algal Blooms …
Nutrient pollution is considered one of America’s most widespread, costly, and challenging environmental problems. Artificial Floating Islands (AFIs), a phytoremediation technolog…
Stability Analysis of Interchange-Stable Plasma Sheet to ExB Shear Flow at Substorm Onset
The shear flow-interchange instability is proposed as the initiating mechanism behind substorm onset. ULF waves occurring within minutes of substorm onset are observed in the magn…
Contrasting Net Ecosystem Production Across Ecological Succession at Subtropical Dry Forest of Northwestern Mexico
Forests are under major pressures due to contemporary land-use, which creates mosaics of stand-stage development that follow different successional paths, that imply ecosystem com…
Identifying and describing the impact of gully erosion in the livelihoods and properties of traditional Himba communiti…
Gully erosion is an accelerator of land degradation and one of the most critical agents threatening the environment in Namibia’s north-western region. Large gullies dominating all…
Morphodynamics of boulder-bed semi-alluvial streams in northern Fennoscandia: a flume experiment to determine sediment …
In northern Fennoscandia, semi-alluvial boulder-bed channels with coarse glacial legacy sediment are abundant, and due to widespread anthropogenic manipulation during timber-float…
Detection and classification of skylights on the flank of Elysium Mons, Mars
The Martian caves have revived interest in the field of speleology because they are the potential destinations for future human residences and astrobiological research. The skylig…
Improving Characterization of Vapor Intrusion Sites with A Deep Learning-based Data Assimilation Method
Knowledge of soil properties is essential for risk assessment of vapor intrusion (VI). Data assimilation (DA) provides a valuable means to characterize contaminated sites by fusin…
Examining CO2 model observation residuals and their implications for carbon fluxes and transport using ACT-America obse…
Atmospheric CO2 inversion typically relies on the specification of prior flux and atmospheric model transport errors, which have large uncertainties. Here, we use ACT-America 30 a…
A Multi-Fidelity Framework for Ocean Temperature Reconstruction Based on Model-Inferred Dynamics and Real Time Satellit…
Despite advancements in computational science, nonlinear geophysical processes still present important modeling challenges. Physical sensors (such as satellites, AUVs, or buoys) c…
Investigating the Effects of Soil Clay Fraction on Ammonium Migration through Porous Media
Ammonium contamination is one of the most nocive forms of groundwater contamination caused due to the extensive use of nitrogen fertilizers. Contaminant transport is governed by t…
On differentiating multiple types of ULF magnetospheric waves in response to solar wind periodic density structures
Identifying the nature and source of Ultra Low Frequencies (ULF) waves (f ≤ 4 mHz) at discrete frequencies in the Earth’s magnetosphere is a complex task. The challenge comes from…
The Non-traditional Coriolis force drives Westward tilts in Multiscale Theories and Laboratory Experiments of Tropical …
Twenty years ago, Andy Majda and Rupert Klein developed a multiscale asymptotic theory of tropical dynamics which they named IPESD. IPESD is a linear, forced, dynamical theory on …
Modeling of ocean wave periodical impact to across the crevasse-ridden ice shelf: focus on the comparison of two models
The propagation of high-frequency elastic-flexural waves through an ice shelf was modeled by a full 3-D elastic models. These models based on the momentum equations that were writ…
Experimental Results and Model Validation of Melt Probes in Cryogenic Ice for the Exploration of Ocean Worlds
Ocean worlds are a promising environment for harboring extraterrestrial life. Their oceans, however, are often enclosed under a thick layer of ice. The current best estimate of th…
Research and Observatory Catchments: Promoting the Sites Behind the Rich Legacy of Knowledge Discovery and Innovation
Catchment studies provide foundational scientific knowledge that is relevant to policy, resource management, education, outreach, and public awareness of the environment and envir…
An Integrated Approach to Analyze Concurrent Debris Flow-Induced Transport Network Failures
Disasters triggered by extreme precipitation events i.e., landslides, debris flows, and floods cause devastating damages to lives, infrastructure, and the economy. Under a warming…
Overall Radiation Pattern of Four Bremsstrahlung Particle System
Terrestrial Gamma-ray Flashes exhibit slopes of ionizing radiation associated with bremsstrahlung. Bremsstrahlung has a continuous spectrum of radiation from radio waves to ionizi…
Mapping flow-obstructing structures on global rivers
To help store water, facilitate navigation, generate energy, mitigate floods, and support industrial and agricultural production, people have built and continue to build obstructi…
A River Ran Through It: Floodplains as America’s Newest Relict Landform
Recent advances in Earth observation data and computing ability create exciting opportunities for national and global studies of human impacts to water resources. But, with a lack…
Holistic and pragmatic standards processes enable interdisciplinary science
Open, interdisciplinary science inevitably relies heavily on standards. Standards are those often unseen agreements that we take for granted when systems and processes are working…
Future risk evaluation of the global COVID-19 pandemic
The ongoing coronavirus disease 2019 (COVID-19) pandemic has caused more than 150 million cases of infection to date and poses a serious threat to global public health. In this wo…
Rainfall-runoff modeling at different spatial scales: Application of semi-distributed hydrological modeling in the Goda…
Increased space-time resolution of hydrologic information in combination with better understanding of hydrologic processes allowed evolution of rainfall-runoff modeling from lumpe…
Human influence on the increasing drought risk over Southeast Asian monsoon region
Southeast Asian monsoon region is regularly stricken by drought, but less attention is paid due to its slow-onset and less visual impact. This study investigated the observed drou…
Frequency considerations in GIC applications
Geomagnetically induced currents (GIC) are a phenomenon well known for its negative effects on the operations of power systems. To efficiently mitigate them requires different typ…
Simulating Lagrangian Subgrid-Scale Dispersion on Neutral Surfaces in the Ocean
To capture the effects of mesoscale turbulent eddies, coarse-resolution Eulerian ocean models resort to tracer diffusion parameterizations. Likewise, the effect of eddy dispersion…
A New Global Ionospheric Electron Density Model Based on Grid Modeling Method
Based on nearly 4.6 million radio occultation ionospheric profile data from COSMIC satellites in 2006-2020, a global three-dimensional ionospheric electron density model was const…
SSP-Based Land Use Change Scenarios: A Critical Uncertainty in Future Regional Climate Change Projections
To better understand the role projected land-use changes (LUC) may play in future regional climate projections, we assess the combined effects of greenhouse-gas (GHG)-forced clima…
Active subaquatic fault segments in Lake Iznik along the middle strand of the North Anatolian Fault, NW Turkey
The seismic activity of the middle strand of the North Anatolian Fault (MNAF), Northwestern Turkey, is debated because of its quiescence during the instrumental period, in contras…
Clustering Analysis Methods for GNSS Observations: A Data-Driven Approach to Identifying California’s Major Faults
We present a data-driven approach to clustering or grouping Global Navigation Satellite System (GNSS) stations according to their observed velocities, displacements or other selec…
Three-Dimensional Dynamic Rupture Simulations on Partially-Creeping Strike-Slip Faults
Partially creeping faults exhibit complex behavior in terms of which parts of the fault slip seismically versus aseismically. The specific geometry of creeping versus locked fault…
High-resolution imaging of continental tectonics in the mantle beneath the United States, through the combination of US…
A comprehensive North American upper mantle seismic-tomographic model, NA13, was inferred from a combination of several decades of seismic data from early North American seismic m…
Increasing Multiyear Sea Ice Loss in the Beaufort Sea: A New Export Pathway for the Diminishing Multiyear Ice Cover of …
Historically multiyear sea ice (MYI) covered a majority of the Arctic and circulated through the Beaufort Gyre for years. However, increased ice melt in the Beaufort Sea during th…
Less surface sea ice melt in the CESM2 improves Arctic sea ice simulation with minimal non-polar climate impacts
This study isolates the influence of sea ice mean state on pre-industrial climate and transient 1850-2100 climate change within a fully coupled global model: The Community Earth S…
Spoilt for Choice -- When to Use Which Bedform Identification Tool for What Purpose?
Subaqueous dunes are fascinating morphological features that exist in diverse environments such as the deep sea, continental shelves and inland streams or rivers. Due to their rhy…
Challenges to Establishing a Global Paleolatitude Framework: Paleomagnetic Inconsistencies in the Plate Circuit Through…
The paleolatitude distribution of paleoclimate proxies and contintential landmass is an important constraint for modeling and understanding paleoclimate. True polar wander (TPW), …
Bringing cosmochemistry data into the Big-Data Era: the AstroMaterials Data System
The Astromaterials Data System (AstroMat) is a NASA-funded project, working in close collaboration with the Johnson Space Center (JSC) to provide access to and preserve analytical…
DEM analyses of cemented granular fault gouges at the onset of seismic sliding: peak strength, development of shear zon…
Fault zones usually present a granular gouge, coming from the wear material of previous slips. This layer contributes to friction stability and plays a key role in the way elastic…
Nanoscale crystal fabric preserved in dolomite ooids at the onset of the Shuram Excursion
Dolomite (CaMg(CO3)2) forms in minor quantities in modern environments yet comprises most of the Precambrian carbonate rock record. Precambrian dolomites are often fine-grained an…
Machine learning for red tide prediction in the Gulf of Mexico along the West Florida Shelf
The objective of this study is to understand relations between multiple physical and environmental factors and red tide, which is a common name for harmful algal blooms occurring…
Investigation of Kinetic Ballooning Instability in 2D Harris Sheet Equilibrium with Finite Normal BZ Field.
Substorm onset is believed to be a fundamental process for magnetic and plasma energy transport in both magnetosphere and ionosphere.Ballooning instability is one of the key trigg…
Evaluating the de Hoffmann-Teller cross-shock potential at real collisionless shocks
Shock waves are common in the heliosphere and beyond. The collisionless nature of most astrophysical plasmas allows for the energy processed by shocks to be partitioned amongst pa…
The ubiquity and significance of extensional grabens on Mercury's lobate scarps
Mercury’s surface is dominated by tectonic landforms formed by compression. Other than within basins, extensional landforms are not well known and have been presumed to be much ra…
MHD Avalanches: Self-Consistent Heating in Model Active Regions
MHD avalanches involve small, intensely localized instabilities that spread across neighbouring regions in a magnetic field. Cumulatively, many small events release vast amounts o…
US Trends in Wildfire Smoke derived from NOAA's Hazard Mapping System Smoke Product and Airport Data from 2010-2020
The scale of wildfires and their associated smoke plumes have increased in the last four decades and have exacerbated the health risks for people living within wildfire-prone area…
Repeating Icequakes at the Grounding Line of Rutford Ice Stream, West Antarctica
Basal microseisms in Antarctica, or icequakes, are valuable data sources that we can use to determine features and processes at the bed to improve our understanding of ice flow dy…
SuperflexPy: a new open source framework for building conceptual hydrological models
Conceptual models are among the most frequently used type of models in watershed modelling studies, due to their low computational requirements and ease of interpretation. Model s…
Exploring the Model Space of Airborne Electromagnetic Data to Delineate Large-Scale Structure and Heterogeneity within …
Airborne electromagnetic (AEM) data can be inverted to recover models of the electrical resistivity of the subsurface; these, in turn, can be transformed to obtain models of sedim…
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