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Showing 9651 to 9700 of 22070 works
Detecting Sub-Micron Space Weathering Effects in Lunar Grains with Synchrotron Infrared Nanospectroscopy
Space weathering processes induce changes to the physical, chemical, and optical properties of space-exposed soil grains. For the Moon, space weathering causes reddening, darkenin…
Using percolation-based effective-medium approximation to determine effective permeability in fractured reservoirs
Fractures play an important role in transport in unconventional formations. Both matrix and fracture network in fractured media contribute to the effective permeability (k eff ). …
Extraction of P and Scholte waves from ambient seafloor noise observed by distributed acoustic sensing
Seismic wave extractions have been performed using ambient noise records observed by distributed acoustic sensing (DAS) technology. Extractions of microseisms can be investigated …
Data-driven Modeling of the Day-to-Day Variability of the Equatorial Electrojet Using Ground- and Space-based Magnetome…
The equatorial electrojet (EEJ) is an important manifestation of ionospheric electrodynamics. Day-to-day changes of the EEJ result from E-region dynamo processes that are primaril…
Patterns and Processes in Aerosol Bulk Deposition: Insights from a 9-year Study of 7Be, 210Pb, Sulfate and Major/Trace …
We report fallout radionuclide (FRN) and major/trace element (MTE) contributions to bulk atmospheric deposition in Hanover, NH USA (43.7022° N, 72.2896° W). Deposition of 7 Be, 21…
Studies of Soil Mineral-Organic Matter Associations and Plant Nutrient Fixation Using Synchrotron X-ray Methods
To address some challenging biological and environmental problems, scientists at the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory (P…
The 2021 “Complex systems” Nobel prize:The climate, with and without geocomplexity
One half of this year’s Nobel Physics prize was awarded to statistical physicist Giorgio Parisi and the other - the first ever in geophysics - to climate scientists Syukoro Manabe…
Interpretable Machine Learning to Forecast SEP Events for Solar Cycle 23
We use machine learning methods to predict whether an active region (AR) which produces flares will lead to a solar energetic particle (SEP) event using Space-Weather Michelson Do…
Three-Dimensional Permeability Inversion Using Convolutional Neural Networks and Positron Emission Tomography
Quantification of heterogeneous multiscale permeability in geologic porous media is key for understanding and predicting flow and transport processes in the subsurface. Recent uti…
Preferred orientation of montmorillonite reduces friction by holding water
The presence of smectite is critical for weakening the frictional strength of natural faults. The friction coefficient of smectite changes depending on water presence, chemical co…
Long-term preservation of Hadean protocrust in Earth's mantle
With plate tectonics operating on Earth, the preservation potential for mantle reservoirs from the Hadean Eon (>4.0 Ga) has been regarded as very small. The quest for such early r…
Changes in seismic attenuation due to fracturing and fluid migration during the 2016-2017 Central Italy seismic sequence
The Amatrice-Visso-Norcia seismic sequence struck Central Italy across the Apenninic normal faults system in 2016. Fluids likely triggered the sequence and reduced the stability o…
Surface Deformation and Seismicity Induced by Poroelastic Stress at the Raft River Geothermal Field, Idaho, USA
We investigate the relative importance of injection and production on the spatial-temporal distribution of induced seismicity at the Raft River geothermal field. We use time-serie…
Coupled Modelling of Water Fluxes and Electrical Self Potential in Melting Snow
Modelling and monitoring seasonal snow are critical for water resource management, flood forecasting and avalanche risk prediction. Snowmelt processes are of particular importance…
The Cluster Virtual Observatory for ULF Waves
Since its launch in 2000, the Cluster fleet visited a vast domain of the circum-terrestrial environment, from upstream solar wind and distant tail, down to the plasmasphere, scann…
Spatial patterns and possible mechanisms of precipitation changes in recent decades over the Tibetan Plateau in the con…
The Tibetan Plateau (TP) significantly affects its surroundings and the global climate through thermal and dynamic processes. Precipitation is a key driver of hydrological, meteor…
Evidence for decreased precipitation variability in the Yucatan Peninsula during the mid-Holocene
The Yucatan Peninsula (YP) has a complex hydroclimate with many proposed drivers of interannual and longer-term variability, ranging from coupled ocean-atmosphere processes to fre…
Assimilation of All Sky Infrared Radiance from INSAT-3D/3DR Satellite in the WRF Model
The all-sky Infrared (IR) radiance assimilation from geostationary satellites has been a prime research area in the numerical weather prediction (NWP) modeling. In this study, the…
Monitoring the storage volume of water reservoirs using Google Earth Engine
Recently, the satellite images have been used in remote sensing allowing observations with high temporal and spatial distribution. The use of water indices has proved to be an eff…
On the implementation and usability of CPO evolution in geodynamic modelling
Flow in the Earth’s mantle causes preferred orientation of crystals called Lattice/Crystal Preferred orientation (LPO or CPO). This preferred orientation is one of the main reason…
Anthropogenic activity at the Leyte geothermal field promoted the 2017 Mw 6.5 earthquake
Recent studies of anthropogenically induced seismicity have improved our understanding of the causal relationships between earthquakes and industrial activity. Whether larger-magn…
Moment Tensors of Ring-Faulting at Active Volcanoes: Insights into Vertical-CLVD Earthquakes at the Sierra Negra Calder…
Moderate earthquakes (Mw > 5) with moment tensors (MTs) dominated by a vertical compensated-linear-vector-dipole (vertical-CLVD) component are often generated by dip slip along a …
Iridium Communications Satellite Constellation Data for Study of Earth's Magnetic Field
Characterization of Earth’s magnetic field is key to understanding the dynamics of core flows and the dynamo. Satellite measurements of the magnetic field normally use precise mag…
The impact of a 3-D Earth structure on glacial isostatic adjustment in Southeast Alaska following the Little Ice Age
In Southeast Alaska, extreme uplift rates are primarily caused by glacial isostatic adjustment (GIA), as a result of ice thickness changes from the Little Ice Age to the present c…
On the Solar Wind Proton Temperature Anisotropy at Mars' Orbital Location
The Mars Atmosphere and Volatile EvolutionN (MAVEN) spacecraft can act as an intermittent upstream solar wind monitor at ~ 1.5 AU. To inspect the evolution of solar wind turbulenc…
Energetic Fe Ions In And Near The Magnetospheres Of Earth, Jupiter, And Saturn
We examine long-term energetic heavy ion measurements including three planets’ magnetospheres, focusing on Fe ions (specifically, but not exclusively, Fe+) in and near Earth’s mag…
Multi-level Lagrangian analysis of the northern stratospheric polar vortex split in April 2020
The present paper examines the northern stratosphere during April 2020, when the polar vortex split into two cyclonic vortices after a winter with the strongest ozone depletion on…
Joint Dependence of Longwave Feedback on Surface Temperature and Relative Humidity
Understanding how the outgoing long-wave radiation (OLR) depends on surface temperature is a climate problem of long standing. Various studies have suggested that clear-sky OLR va…
From Substrate to Surface: A Turbulence-based Model to Predict Interfacial Gas Transfer across Sediment-water-air Inter…
Turbulence generated by aquatic vegetation plays a vital role in the interfacial transfer process at the air-water interface and sediment-water interface (AWI and SWI), impacting …
Application of Machine Learning Methods to improve vertical accuracy of CARTOSAT DEM
In recent decades, the application of Digital Elevation Models (DEMs) has been widely used in various aspects such as land management and flood planning since it reflects the actu…
Large Electron Densities in the Early Morning Equatorial Ionosphere Observed with UV Instruments from Space
The equatorial ionosopheric anomalies (EIA) at night are the slowly recombining remnants of the dayside ionosphere, and charged particle densities slowly decay during the course o…
Solar Orbiter Energetic Particle Detector: Early Results and Science Data Center
The Energetic Particle Detector (EPD) onboard Solar Orbiter is a suite of multiple sensors (Suprathermal Electrons Protons, STEP; Suprathermal Ion Spectrograph, SIS; Electron Prot…
Diazotroph community and activity in the Southern Indian Ocean
Dinitrogen (N2) fixers (diazotrophs) fuel primary productivity by providing reactive nitrogen into the ocean ecosystem and promoting CO2 sequestration. N2 fixation has been extens…
Exploring a Lunar Magnetic Anomaly: The Lunar Vertex PRISM Mission
NASA designated Reiner Gamma (RG) as the landing site for the first Payloads and Research Investigations on the Surface of the Moon (PRISM) delivery (dubbed PRISM-1a). Reiner Gamm…
Correlation Between Cloud Adjustments and Cloud Feedbacks Responsible for Larger Range of Climate Sensitivities in CMIP6
While the higher mean Equilibrium Climate Sensitivity (ECS) in CMIP6 has been attributed to more positive cloud feedbacks, it is unclear what causes the greater range of ECS value…
Investigating Spatio-temporal Changes in Groundwater Quality for London Between 2000-2020
The groundwater is relatively a pure natural resource as compared to the surface water, but anthropogenic activities pose a threat to its purity and suitability for drinking purpo…
British Antarctic Survey’s Aerogeophysics Data: Releasing 20 Years of Radar, Magnetic and Gravity Data over Antarctica
The UK Polar Data Centre (PDC, https://www.bas.ac.uk/data/uk-pdc/) is the focal point for Antarctic environmental data management in the UK. Part of the Natural Environmental Rese…
Identifying potential sources of sediment contribution based on hillslope characterization
Hillslopes are responsible for the production and transport of sediments within a landscape (Gilbert 1877). Since the hillslope gradient and morphology tend to vary across a lands…
Englacial lake dynamics within a Pleistocene Cordilleran ice sheet at Kima Kho tuya (British Columbia)
Passage zones are stratigraphic surfaces found in littoral settings separating deposits diagnostic of subaqueous environments from overlying sequences of subaerial deposits. In gl…
Estimation of Hydraulic Conductivity in a Watershed Using Multi-source Data via Co-Kriging and Bayesian Experimental De…
Enhanced water management systems depend on accurate estimation of hydraulic properties of subsurface formations. This is while hydraulic conductivity of geologic formations could…
Geochemical and 87 Sr/ 86 Sr and δ 44/40 Ca Compositions of Ediacaran Carbonates from the Indian Shield: Understanding …
The Neoproterozoic Era represents extreme environmental conditions with three major glaciation events. Associated with these glaciation and deglaciation periods are high amplitude…
Multi-Faceted Science Enabled by the Airborne Glaciological and Oceanographic Observations during NASA's 5-year Oceans …
For the past 5 years, NASA’s Oceans Melting Greenland (OMG) mission has been motivated by the question: “to what extent are the oceans melting Greenland’s ice from below?” Three o…
Machine Learning Forecasts of Hourly and Daily Watertable Levels in a Wet Prairie.
Wet Prairies are unique communities occurring in isolated, saturated depressions that typically have standing water from late fall to late spring and then dry up and are burned by…
Influence of Solar Activity and Large-scale Climate Phenomena on Extreme Climate and Hydrological Events in an Arid-Sem…
With a warming climate, solar activity including Sunspot Number (SSN) and large-scale climate phenomena including EI Niño-Southern Oscillation (ENSO), Pacific Decadal Oscillation …
A Scaling Relation Between the Moment Release due to Aseismic Motion and the Injected Volume of Fluid
Constraining the moment release of injection-induced earthquakes is of paramount importance to reduce the seismic hazard in the geo-energy industry. Recent studies suggest that a …
Stable Calcium Isotopic Variability in Groundwater from Coastal Aquifers from the Sundarbans Delta, India
Coastal aquifers act as a major host of seawater-groundwater interaction and play an important role in modulating the marine elemental budget. Calcium stable isotopes (δ 44/40 Ca)…
Mangrove ecosystems in the coastal zone of Kutch, western India, used for traditional pastoralism: effects of climate c…
Mangroves cover a large area of the coastal region of Kutch in the state of Gujarat in western India. The Maldharis, the inhabitants of this region, have been using mangrove fores…
Regional patterns and drivers of nitrogen trends in a human-impacted watershed and management implications
Nutrient enrichment is a major issue to many inland and coastal waterbodies worldwide, including Chesapeake Bay. River water quality integrates the spatial and temporal changes of…
Why is interseismic shortening of the overriding plate largely restricted to the near-trench region?
We aim to better understand the spatial distribution of interseismic overriding plate deformation at and near subduction zones. To this end, we analyze horizontal GNSS velocities …
Constraining the ocean’s biological pump with in situ optical observations and supervised learning. Part 2: Carbon Flux
Export of sinking particles from the surface ocean is critical for carbon sequestration and for providing energy to the deep-ocean biosphere. The magnitude and spatial patterns of…
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