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Showing 5451 to 5500 of 59105 works
Coandă and Venturi Effects at the Eighth Wonder of the World─ the White Terrace
The grandest geotourism attractions in the southern hemisphere, in the nineteenth century were the siliceous Pink and White Terraces, the lost New Zealand Eighth Wonder of the Wor…
Simulating aerosol lifecycle impacts on the subtropical stratocumulus-to-cumulus transition using large-eddy simulations
Observed stratocumulus to cumulus transitions (SCT) and their sensitivity to aerosols are studied using a Large-Eddy Simulation (LES) model that simulates the aerosol lifecycle, i…
The geologically recent areas as one key target for identifying active volcanism on Venus.
The recently selected NASA VERITAS and DAVINCI missions, the ESA EnVision, the Roscosmos Venera-D will open a new era in the exploration of Venus. One of the key targets of the fu…
High-Pressure Melting Curve of FeH: Implications for Eutectic Melting between Fe and Non-Magnetic FeH
While hydrogen could be an important light alloying element in planetary iron cores, phase relations in the Fe-FeH system remain largely unknown at high pressures and temperatures…
Hydrogeological Properties at the Toe of the Nankai Accretionary Prism, using Borehole Geophysical and Petrophysical Da…
The Nankai Trough is a locus of slow slips, low frequency, and large-magnitude classical earthquakes. It is assumed that high pore pressure contributes substantially to earthquake…
On the Relationships between Low-Frequency Variations of Earth's Rotation and Equatorial Atmospheric Angular Momentum
This work mainly concerns low-frequency variations of Atmospheric Angular Momentum (AAM), emphasizing the role of the equatorial region and its relationships with the length of da…
Likely P-to-S Conversion at the Core-Mantle Boundary Extracted From Array Processing of Noise Records
Seismic noise has been widely used to image Earth's structure in the past decades as a powerful supplement to earthquake signals. Although the seismic noise field contains both su…
Wind-wave attenuation under sea ice in the Arctic: a review of remote sensing capabilities
Wind-generated waves strongly interact with sea ice and impact air-sea exchanges, operations at sea, and marine life. Unfortunately, the dissipation of wave energy is not well qua…
Impact of COVID-19 lock-down on aerosol characteristics over urban and rural environments in peninsular India
The COVID-19 pandemic has caused concerns globally. However, there are some positive effects because of the outbreak such as cleaner air caused due to the lock-down. The pandemic …
A neural network super-resolution approach for the reconstruction of coastal sea states
In this paper, a neural-network-based super-resolution technique is applied to the reconstruction of significant wave height and other sea state variables calculated over coarse m…
CO2 Dissolution Efficiency during Geological Carbon Sequestration (GCS) in Randomly Stratified formations
Geological Carbon Sequestration mitigates climate change by capturing and storing carbon emissions in deep geologic formations. Dissolution trapping is one mechanism by which CO2 …
Broadband dynamic rupture modeling with fractal fault roughness, frictional heterogeneity, viscoelasticity and topograp…
Advances in physics-based earthquake simulations, utilizing high-performance computing, have been exploited to better understand the generation and characteristics of the high-fre…
Using misorientation and weighted Burgers vector statistics to understand the intragranular boundary development and gr…
Strain weakening during plastic deformation can be achieved via strain energy reduction due to intragranular boundary development and grain boundary formation. To examine intragra…
Seasonal Variation of Thermospheric Composition Observed by NASA GOLD
We examine characteristics of the seasonal variation of thermospheric composition using column number density ratio ∑ O/N 2 observed by the NASA Global Observations of Limb and Di…
Kinematic and dynamic-controlled variations in earthquake-size distribution - a case study from Southern California
Frequency-magnitude relation of earthquakes from Gutenberg-Richter law is computed in Southern California. A supporting dataset is created, by merging coordinates and magnitudes o…
AI-based unmixing of medium and source signatures from seismograms: ground freezing patterns
Seismograms always result from mixing many sources and medium changes that are complex to disentangle, witnessing many physical phenomena within the Earth. With artificial intelli…
Assessing impact of tillage and mulch on soil erosion estimated by Beryllium-7 and on soil moisture, and runoff in Cent…
This study was conducted to assess effect of tillage and mulch on soil erosion control in typical agroecological conditions of Benin. In addition, it involved also the assessment …
Improving the Thermosphere Ionosphere in a Whole Atmosphere Model by Assimilating GOLD Disk Temperatures
Global-scale Observations of Limb and Disk (GOLD) disk measurements of far ultraviolet molecular nitrogen band emissions are used to retrieve column integrated disk temperatures (…
Elastic Interaction between a Mesoscale Eddy-Pair and a Cyclonic Eddy
We investigate numerically the elastic interaction between an eddy-pair and an axisymmetrical cyclonic eddy in inviscid isochoric two-dimensional (2D), as well as in three-dimensi…
Spatiotemporal variations of shallow very low frequency earthquake activity southeast off the Kii Peninsula, along the …
Cross-correlation analysis was applied to long-term onshore broadband records from April 2004 to March 2021 to detect and relocate shallow very low frequency earthquakes (VLFEs) s…
Local Mapping of Polar Ionospheric Electrodynamics
An accurate description of the state of the ionosphere is crucial for understanding the physics of Earth’s coupling to space, including many potentially hazardous space weather ph…
Unlearning racism in a federal setting
The Smithsonian – the world’s largest research, education, and museum complex – was established by the U.S. government as a public trust 175 years ago. Many of the geoscientists w…
What Causes Tides?
Tides represent the daily regular alternation of high and low waters at the coasts and in the oceans. This movement of water is usually explained with two paradigms: one is the eq…
Quantifying an underestimated deciduous-needleleaf carbon sink at the southern margin of the central-Siberian permafros…
With over 700 million km 2 Siberia is the largest expanse of the northern boreal forest—deciduous-needleleaf larch. Temperatures are increasing across this region, but the consequ…
A 4DEnVar-based Ensemble Four-Dimensional Variational (En4DVar) Hybrid Data Assimilation System for Global NWPs: System…
This study developed an ensemble four-dimensional variational (En4DVar) hybrid data assimilation (DA) system. Different from most of the available En4DVar systems that adopted ens…
River effects on sea-level rise in the Río de la Plata during the past century
Identifying the causes for historical sea-level changes in coastal tide-gauge records is important for constraining oceanographic, geologic, and climatic processes. The Río de la …
A tool for generating fast k-distribution gas-optics models for weather and climate applications
One of the most important components of an atmospheric radiation scheme is its treatment of gas optical properties, which determines not only the accuracy of its radiative forcing…
Hydrological History of a Palaeolake and Valley System on the Planetary Dichotomy in Arabia Terra, Mars
Hundreds of ancient palaeolake basins have been identified and catalogued on Mars, indicating the distribution and availability of liquid water as well as sites of astrobiological…
Impact of Rocket Launch and Space Debris Air Pollutant Emissions on Stratospheric Ozone and Global Climate
Detailed examination of the impact of modern space launches on the Earth’s atmosphere is crucial, given booming investment in the space industry and an anticipated space tourism e…
Active Precipitation of Radiation Belt Electrons using Rocket Exhaust Driven Amplification (REDA) of Man-Made Whistlers
Ground-based VLF transmitters located around the 2 world generate signals that leak through the bottom side of the 3 ionosphere in the form of whistler mode waves. Wave and partic…
Full-field modeling of heat transfer in asteroid regolith 2: Effects of porosity
The thermal conductivity of granular planetary regolith is strongly dependent on the porosity, or packing density, of the regolith particles. However, existing models for regolith…
On the Linearity of External Forcing Response in Solar Geoengineering Experiments
To assess impacts of solar geoengineering, the GeoMIP G1 experiment forces Earth System Models with prescribed reductions in solar radiation to balance increases in atmospheric CO…
Sporotrichum Schenkii Ecology Major Lipid Constituents
The study was carried out to find significant lipid constituents of Sporotrichum schenckii (S. schenckii), purified lipid extract was assessed, and the ecology of S. schenckii was…
The influence of land-use and seasons on SOM distribution in headwaters of a central Ohio watershed
Soil organic matter (SOM), the accumulated, decaying debris of biota living on or in the soil, represents the largest of the active terrestrial C pools, holding about 1500 Pg C to…
Complementary observations aid identification of the mountain rain-snow transition elevation
The elevation of the mountain rain-snow transition is critical for short-term hazard forecasting and longer-term water supply considerations. Despite the transition’s importance, …
Penetrating electric field during the Nov 3-4 2021 Geomagnetic Storm
We simulated the Nov 4, 2021 geomagnetic storm event penetrating electric field using the Multiscale Atmosphere-Geospace Environment (MAGE) and compared with the NASA ICON observa…
Substorm Onset Prediction using Machine Learning Classified Auroral Images
We classify all sky images from 4 seasons, transform the classification results into time-series data to include information about the evolution of images and combine these with i…
The Global Seismic Moment Rate of Mars after Event S1222a
The seismic activity of a planet can be described by the corner magnitude, events larger than which are extremely unlikely, and the seismic moment rate, the long-term average of a…
Wet and Dry Cold Surges over the Maritime Continent
Cold surges are synoptic weather systems that occur over the Maritime Continent during the boreal winter. They are characterised by the strengthening of prevailing low-level north…
The Role of Clouds in Shaping Tropical Pacific Response Pattern to Extratropical Thermal Forcing
Extratropical influences on tropical sea surface temperature (SST) have implications for decadal predictability. We implement a cloud-locking technique to highlight the critical r…
An evaluation of kilometer-scale ICON simulations of mixed-phase stratocumuli over the Southern Ocean during CAPRICORN
This study investigates the representation of stratocumulus (Sc) clouds, cloud variability, and precipitation statistics over the Southern Ocean (SO) to understand the dominant ic…
Soil Carbon Storage in Willamette Valley Grass Seed Systems: A review
Agricultural systems have potential to store carbon (C) when soil C management practices are in place. Some of these practices may include the production of perennial crops, inclu…
Data-driven exploration of the variability, controls and future changes of dimethyl sulfide in the global surface ocean
As the largest natural source of sulfur-containing gases into the atmosphere, ocean organism-derived dimethyl sulfide (DMS) has been considered to play a critical role in the Eart…
Continuous monitoring of nighttime light changes based on daily NASA's Black Marble product suite
Monitoring nighttime light (NTL) change enables us to quantitatively analyze the dynamic patterns of human activity and socioeconomic features. NASA’s Visible Infrared Imaging Rad…
Mineral prospectivity mapping of tungsten polymetallic deposits using machine learning algorithms and comparison of the…
The current study aimed at assessing the capabilities of five machine learning models in term of mapping tungsten polymetallic prospectivity in the Gannan region of China. The fiv…
Eruption Forecasting of Strokkur Geyser, Iceland, Using Permutation Entropy
A volcanic eruption is usually preceded by seismic precursors, but their interpretation and use for forecasting the eruption onset time remain a challenge. A part of the eruptive …
Influence of Grain-Scale Properties on Localization Patterns and Slip Weakening within Dense Granular Fault gouges
Fault zones are usually composed of a granular gouge, coming from the wear material of previous slips, which contributes to friction stability. Once considering a mature enough fa…
Multi-Objective Optimization of Reservoir Operation using Machine Learning Models. Case study: Hatillo Reservoir in the…
Finding optimum balances between conflicting interests in multipurpose reservoirs often represents an important challenge for decision makers. This study assesses the use of diffe…
Data assimilation for Numerical Smoke Prediction
Skillful forecasts of weather phenomena in numerical models begin with the most accurate set of initial conditions achievable from observational datasets. The process of combining…
Multi-source Perturbations in the Evolution of a Low-latitudinal Equatorial Plasma Bubble Event Occurred over China
In this paper, multi-ground-based instruments, including an all-sky airglow imager (ASAI), a very high frequency (VHF) radar, and eight digisondes, were combined to investigate mu…
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