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Showing 10901 to 10950 of 59105 works
Spatial distribution of artisanal goldmining in Ghana: Using machine learning and Google Earth Engine to quantify conve…
Gold mining has played a significant role in Ghana’s economy for centuries. Regulation of this industry has varied over time and while large-scale mining is prevalent in the count…
The IPCC Special Report on Ocean and Cryosphere in a Changing Climate - a view from the mountain tops to the deepest de…
Alterations in the ocean and polar and mountain cryosphere from climate change have the potential for far-reaching impacts on ecosystems and human systems all over the world. The …
Nonlinearity and multivariate dependencies in land-atmosphere coupling
Most studies of land-atmosphere coupling have focused on bivariate linear statistics like correlation. However, more complex dependencies exist, including nonlinear relationships …
Dynamic upwelling beneath the Salton Trough imaged with teleseismic attenuation tomography
The Salton Trough is one of the few regions on Earth where rifting is sub-aerial instead of sub-marine. We use the relative attenuation of teleseismic P phases recorded by the Sal…
Statistical and Machine Learning Methods Applied to the Prediction of Tropical Rainfall
We explore the use of three advanced statistical and machine learning methods (a generalized linear model, random forest, and neural network) to predict the occurrence and rain ra…
A multiscale numerical modeling investigation on the significance of flow partitioning for the development of quartz c-…
Quartz c-axis fabrics in natural mylonites can vary to such an extent that they apparently give opposite senses of shear in a single thin section. Many hypotheses have been invoke…
Modulation of storm-time mid-latitude ionosphere by magnetosphere-ionosphere coupling 2
We describe mid-latitude plasma density striations (MDS) modulating the evening side of Storm Enhanced Density (SED) by magnetosphere-ionosphere coupling. The MDS are magnetically…
Earthquake-swarms, slow-slip and fault-interactions at the western-end of the Hellenic Subduction System precede the Mw…
The month-to-year-long deformation of the Earth’s crust where active subduction zones terminate is poorly explored. Here we report on a multidisciplinary dataset that captures the…
Linearity of outgoing longwave radiation: From an atmospheric column to global climate models
The linearity of the global-mean outgoing longwave radiation (OLR) with surface temperature has important implications for climate sensitivity. Global climate models robustly prod…
The Influence of South Pacific Convergence Zone Heating on the South Pacific Subtropical Anticyclone and Southern Hemis…
Subtropical anticyclones and midlatitude storm tracks are key components of the large-scale atmospheric circulation. Focusing on the southern hemisphere, the seasonality of the th…
Role of Future Reef Growth on Morphological Response of Coral Reef Islands to Sea-Level Rise
Coral reefs are widely recognised for providing a natural breakwater effect that modulates erosion and flooding hazards on low-lying sedimentary reef islands. Increased water dept…
Effects of temperature-and pressure-dependent viscosity and internal heating on strongly viscous fluid like the mantle
A mathematical model is considered for Rayleigh-Benard convection of mantle whose viscosity depends strongly both on temperature and pressure defined in an Arrhenius form. The mod…
Data-driven simulation of rapid flux enhancement of energetic electrons with an upper-band whistler burst
The temporal variation of the energetic electron flux distribution caused by whistler mode chorus waves through the cyclotron resonant interaction provides crucial information on …
Performance Analysis of an Extended Sierpinski Gasket Fractal Antenna for mmwave Femtocells Applications
A performance study on design and analysis of an extended sierpinski gasket fractal antenna for mm-wave femtocell applications were implemented. The initial analysis includes the …
On The Robustness of Asthenosphere Plug Flow in Mantle Convection Models With Plate-Like Behavior
The question of what drives tectonic plates has been revitalized by seismic observations that cannot be explained by conventional plate-driving forces. The observations, designed …
Simultaneous Observations of Electromagnetic Ion Cyclotron Waves and Longer-Period Ultra Low Frequency Waves by the GOE…
Simultaneous bursts of EMIC and longer-period ULF waves were observed by the GOES-16 magnetometer on the 11 January and the 7 September 2017. No correlation was found between the …
Imaging the crustal structure beneath the Longmenshan fault zone and geodynamics for Wenchuan Mw 7.9 and Lushan Ms 7.0 …
Although many velocity and electrical models have been proposed in the Longmenshan fault zone (LFZ) and its neighboring areas, the deep structure of seismic gap and the geodynamic…
Multi-scale seasonal variability in Net Community Production and Chlorophyll in the Kuroshio Extension
The Kuroshio current separates from the Japanese coast to become the Kuroshio Extension (KE) characterized by a strong latitudinal density front, high levels of mesoscale (eddy) e…
Smartrock transport in a mountain stream: bedload hysteresis and changing thresholds of motion
Bedload movement is fundamentally probabilistic. Our quantitative understanding of gravel transport is particularly limited when flow conditions just exceed thresholds of motion, …
The visual complexity of coronal mass ejections follows the solar cycle
The Heliospheric Imagers on board NASAs twin STEREO spacecraft show that coronal mass ejections (CMEs) can be visually complex structures. To explore this complexity, we created a…
Co-located Observations of the E and F-region Thermosphere during a Substorm
2D thermospheric wind fields, at both E- and F-region altitudes within a common vertical volume, were made using a Scanning Doppler Imager (SDI) at Poker Flat, Alaska, during a su…
Exploring the Spatiotemporal Variation of Air Pollution Throughout the Urban Landscape of Philadelphia, PA with Mobile …
In this study, we implement a mobile monitoring methodology in order to determine the spatiotemporal distribution of particulate matter (PM) and black carbon (BC) in Philadelphia,…
Entrainment and Dynamics of Ocean-derived Impurities within Europa's Ice Shell
Compositional heterogeneities within Europa’s ice shell likely impact the dynamics and habitability of the ice and subsurface ocean, but the total inventory and distribution of im…
What we know about historical eruptions in Canary Islands and what we can learn
Historical volcanic eruptions in Canary Islands have traditionally been considered as quiet eruptions, mostly effusive and with scant explosions (VEI 1-2), attending to the genera…
Modeling Coupled Reactive Transport Through Fault-zones: A Critical Review
Fault-zones significantly influence the migration of fluids in the subsurface and can be important controls on the local as well as regional hydrogeology. Hence, understanding the…
RUMShake: A pilot amplification study in western Puerto Rico
Each year the PRSN detects ~4,000 earthquakes within and around Puerto Rico, the Virgin Islands and the Eastern Dominican Republic. Given the seismic hazard presented by this eart…
Magnetic Reconnection inside a Flux Transfer Event-like structure in Magnetopause Kelvin-Helmholtz Waves
Magnetopause Kelvin-Helmholtz (KH) waves are believed to mediate solar wind plasma transport via small-scale mechanisms. Vortex-induced reconnection (VIR) was predicted in simulat…
INDO-BURMESE COLLISION OCCURRED AT EOCENE EVIDENCE FROM THE DETRITAL FISSION TRACK THERMOCHRONOLOGY OF NORTHEAST INDIA
Nagaland is part of the northern extension of the Indo Myanmar range(IMR).This area is representative of several orogenic upheavals in the Cretaceous-Tertiary that form a relative…
The Impact of Black Carbon Emissions from Projected Arctic Shipping on Regional Ice Transport
The direct and indirect effects of global emissions of black carbon (BC) on the evolution of Arctic climate has been well documented. The significance of within-Arctic emissions o…
Submarine Slope Failure Dynamics in Sand-Rich Systems: Insights from Physical Experiments and Numerical Models
Submarine slope failures and the tsunamis they generate pose risks to coastal communities and infrastructure. While slope failures on passive margins represent some of the largest…
Towards automated early detection of risks for a CO2 plume containment from permanent seismic monitoring data
Permanent reservoir surveillance is an invaluable monitoring tool for CO2 storage projects, as it tracks spatial-temporal evolution of the gas plume. The frequent images of CO2 pl…
Seismic controls on the progress of serpentinization at ultra-slow spreading ridges
Sustained serpentinization of peridotite within the oceanic lithosphere requires effective supply of water to systems that experience continuous expansion of the solid volume. Hen…
Prevailing Conditions for Dynamic Triggering in Intraplate and Plate-boundary Regions of the USA
To facilitate identification of conditions that lead to the dynamic triggering of seismic events as catalogs of these events keep growing, we applied a machine-learning algorithm …
Detection of Temporal Change in Near-Source Attenuation Affected by Fluid Migration in the Source Region of Intense Ear…
The behaviour of fluids in the crust is key to understanding earthquake occurrence due to the effect of fluid behaviour on fault strength. The attenuation of seismic waves may be …
The Remarkably Strong Arctic Stratospheric Polar Vortex of Winter 2020: Links to Record-Breaking Arctic Oscillation and…
The Northern Hemisphere (NH) polar winter stratosphere of 2019/2020 featured an exceptionally strong and cold stratospheric polar vortex. Wave activity from the troposphere during…
A New Depositional Framework for Massive Iron Formations after The Great Oxidation Event
The oldest recognized proxies for low atmospheric oxygen are massive iron-rich deposits. Following the rise of oxygen ~2.4 billion years ago, massive iron formations largely disap…
Impact of sea-ice model complexity on the performance of an unstructured-mesh sea-ice/ocean model under different atmos…
We have equipped the unstructured-mesh global sea-ice and ocean model FESOM2 with a set of physical parameterizations derived from the single-column sea-ice model Icepack. The upd…
Statistical and event analysis of phase and amplitude scintillations associated with polar cap patches
Global navigation satellite systems (GNSS) or satellite navigation is an important technological advancement; however, it is greatly impacted by the effects of space weather, such…
Spatial Modelling of Central Block Using Geostatistics, Pottangi Bauxite Deposit, Koraput, Odisha
The Koraput district is one of the most important centres for bauxite mining in Odisha. Bauxite deposits of Pottangi are located In Navdapur taluka going northwards towards Pottan…
Field-validated detection of Aureoumbra lagunensis brown tide blooms in the Indian River Lagoon, Florida using Sentinel…
Frequent Aureoumbra lagunensis blooms in the Indian River Lagoon (IRL), Florida, have devastated populations of seagrass and marine life and threaten public health. To substantiat…
Geologic Map of the Niobe Planitia Region (I-2467), Venus.
We present a 1:10M scale map of the Niobe Map Area (NMA) of Venus (0N-57N/60E-80E). Geologic mapping employed NASA Magellan synthetic aperture radar and altimetry data. The NMA ge…
Day-to-day Variability of Field-Aligned Irregularities Occurrence in Nighttime F-region Ionosphere over the Equatorial …
This paper presents a statistical analysis to investigate the day-to-day variability of field-aligned irregularities (FAI) occurrence in nighttime F-region ionosphere over the Equ…
Systematic search for repeating earthquakes along the Haiyuan fault system in Northeastern Tibet
Repeating earthquakes have been found at many faults around the world, and they provide valuable information on diverse faulting behavior at seismogenic depth. The Haiyuan fault i…
On Energy Cascades in General Flows
An important characteristic of geophysically turbulent flows is the transfer of energy between scales. It is expected that balanced flows pass energy from smaller to larger scales…
Icequake source mechanisms for studying glacial sliding
Improving our understanding of glacial sliding is crucial for constraining basal drag in ice dynamics models. We use icequakes, sudden releases of seismic energy as the ice slides…
Reviewing moisture recycling dynamics: implications of land use change on green and atmospheric water
Green water, or plant-available soil moisture, is a substantial subset of terrestrial fresh water. Land use change alters green water dynamics directly, by changing soil and veget…
Jetwash-induced vortices and climate change
This article introduces factors contributing significantly to climate change that have been largely neglected in both the scientific and popular press. These factors have immediat…
Historical Responsibility for Loss & Damage
Loss & Damage (L&D) is the category of policies to address adverse climatic impacts beyond our ability at a given time to adapt to climate change. Policies addressing mitigation, …
ΔO2/N2’ as a Tracer of Mixed Layer Net Community Production: Theoretical Considerations and Proof-of-Concept
The biological oxygen (O2) saturation anomaly ΔO2/Ar is a tracer for net community production (NCP) in marine surface waters, with argon (Ar) normalization used to correct for phy…
Characterization of Transient Geomagnetic Fluctuations and Associated Rapid Ionospheric Currents
Disturbances in the magnetosphere-ionosphere system cause changes in the geomagnetic field that result in ground induced currents (GICs) that are potentially hazardous to electric…
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