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Showing 11551 to 11600 of 22070 works
Experimental study on the influence of CO2 on the rheology and microstructure of deformed olivine aggregates
We conducted high‐temperature and high-pressure deformation experiments on hot-pressed aggregates of olivine + 9 wt% dolomite at 1 GPa and 1100ºC in a Griggs-type apparatus. At ru…
Energy Rate Functions: An Overview of HHT-based Earthquake Source Characterization using Strong Motion Data
Subduction zone earthquakes show varying energy release patterns and frequency content, based on their tectonic settings and hypocentral depths. Resolving these features from the …
A +CG flash caused by a sequence of bidirectional leaders that served to form a ground-reaching branch of a pre-existin…
High‐speed video and electric field change data were used to analyze the initiation and propagation of four predominantly vertical bidirectional leaders making connection to a pre…
Designing with Information Feedbacks: Forecast Informed Reservoir Sizing and Operation
The value of streamflow forecasts to inform water infrastructure operations has been extensively studied. Yet, their value in informing infrastructure design is still unexplored. …
Blanket-peat restoration: numerical study of the underlying processes delivering Natural Flood Management benefits
Headwater blanket-peat restoration activities, in particular revegetation and gully-blocking, are observed to deliver significant Natural Flood Management (NFM) benefits. A recent…
Machine learning-based modeling of vegetation leaf area index and gross primary productivity across North America and c…
Vegetation plays a key role in regulating the material and energy exchanges among the biosphere, the atmosphere, and the pedosphere. Modeling and predicting vegetation key variabl…
Deep learning for data-driven geophysics
“Model-driven” and “data-driven” approaches together have helped humans understand the principles of geophysical phenomena for a long time. With increasingly available geophysical…
Pliocene-Pleistocene stratigraphy and sea-level estimates, Republic of South Africa with implications for a 400 ppmv CO…
Hearty, P. J., Rovere, A., Sandstrom, M. R., O’Leary, M. J., Roberts, D., & Raymo, M. E. (2020). Pliocene‐Pleistocene stratigraphy and sea‐level estimates, Republic of South Afric…
Lithospheric Control of Melt Generation Beneath the Rungwe Volcanic Province and the Malawi Rift, East Africa
The EarthCube BALTO (Brokered Alignment of Long-Tail Observations) project is aimed at developing new cyberinfrastructures that enables brokered access to diverse geoscience datas…
Vision-based Real-time Zooplankton Detection and Classification using Faster R-CNN
Zooplankton is a key ecological component of aquatic ecosystems. Studying and monitoring the spatial distribution and temporal variability of zooplankton is vital to understanding…
Modelling Wave Energy Converter (WEC) pointer absorbers using AMR techniques with both subcycling and non-subcycling
Wave energy has received significant attention in both academic and industrial areas during the past few decades. Among all of Wave Energy Devices (WEC) devices, many researchers …
Machine Learning for Model Error Inference and Correction
Model error is one of the main obstacles to improved accuracy and reliability in state-of-the-art analysis and forecasting applications, both in Numerical Weather Prediction (NWP)…
High obliquity, high angular momentum Earth as Moon's origin revisited by Advanced Kinematic Model of Earth-Moon System
Matija Cuk et.al (2016) have proposed a new model for the birth and tidal evolution of our natural satellite Moon, born from lunar accretion of impact generated terrestrial debris…
First studies of mesosphere and lower thermosphere dynamics using a multistatic specular meteor radar network over sout…
This paper presents for the first time results on winds, tides, gradients of horizontal winds, and momentum fluxes at mesosphere and lower thermosphere (MLT) altitudes over southe…
Late Quaternary active faulting on the inherited Baoertu basement fault within the eastern Tian Shan: Implications for …
The deformation pattern and slip partitioning related to oblique underthrusting of the Tarim Basin in the eastern Tian Shan are not well understood because of the lack of interior…
Dual carbon isotope-based source apportionment and light absorption properties of water soluble organic carbon in PM 2.…
Water soluble organic carbon (WSOC) makes up a large fraction of organic carbon, which attracted great attention due to its light absorption properties and human health effects. S…
Topology and pressure distribution reconstruction of an englacial channel
Glacial hydrology describes the way water moves over, through and under glaciers. Meltwater flows every summer over the surface of glaciers and ice sheets, creating pathways down …
Interaction Between Antarctic Circumpolar Current Eddies and the Sea Ice Edge: Influence on Sea Ice Extent
Multi-decadal expansion in the winter maximum sea ice extent (SIE) around Antarctica was interrupted by contraction, beginning in 2016 and continuing into 2019. This unexpected be…
Strangers in a strange land: a black-box approach to identifying biosignatures
Searching for life on other planets and planetary bodies poses a number of challenges, especially given that there is currently no clear evidence that lifeforms can only conform t…
The Mechanism of the Origin and Development of Lightning from Initiating Event to Initial Breakdown Pulses (v.2)
Based on experimental results of recent years, this article presents a qualitative description of a possible mechanism (termed the Mechanism) covering the main stages of lightning…
Global monitoring data shows grain size controls turbidity current structure
The first detailed measurements from active turbidity currents have been made in the last few years, at multiple sites worldwide. These data allow us to investigate the factors th…
Autocorrelation of the ground vibrations recorded by the SEIS-InSight seismometer on Mars
The SEIS seismometer of the InSight mission was deployed on the ground of Elysium Planitia, on 19 December 2018. Interferometry techniques can be used to extract information on th…
The mechanical response of a magma chamber with poroviscoelastic crystal mush
Improved understanding of the impact of crystal mush rheology on the response of magma chambers to magmatic events is critical for better understanding crustal igneous systems wit…
Increasingly frequent poleward excursions by the Himalayan subtropical jet
Since the 1980s, the subtropical jet stream has generally moved poleward, but its behavior varies strongly by region and season. Here we examine the interannual variability and tr…
Origin of Sr-enriched glassy picrites from the Karoo Large Igneous Province
Magmatic products of the Karoo Large Igneous Province can be divided into a volumetrically dominant, compositionally uniform low-Ti tholeiitic suite, and a subordinate, geographic…
The Mysterious Green Streaks Below STEVE
STEVE (Strong Thermal Emission Velocity Enhancement) is an optical phenomenon of the sub-auroral ionosphere arising from extreme ion drift speeds. STEVE consists of two distinct c…
A generalized approach to generate synthetic short-to-medium range hydro-meteorological forecasts
Forecast informed reservoir operations holds great promise as a soft pathway to improve water resources system performance. Methods for generating synthetic forecasts of hydro-met…
Designing Decision Support Systems with Interdisciplinary, International Teams: A Case Study of the Environment, Vulner…
The Environment-Vulnerability-Decision-Technology (EVDT) integrated modeling framework considers the interactions between the environment, societal impact, human decision-making, …
Textural and compositional changes in the lithospheric mantle atop the Hawaiian plume: Consequences for seismic propert…
We characterized the texture, composition, and seismic properties of the lithospheric mantle atop the Hawaiian plume by petrostructural analysis of 48 spinel-peridotite xenoliths …
Sensitivity of Tropical Extreme Precipitation to Surface Warming in Aquaplanet Experiments Using a Global Nonhydrostati…
Increases of atmospheric water vapor holding capacity with temperature (7-8%K^(-1), CC-rate) can lead to increasing Extreme Precipitation (EP). Observations show that tropical EP …
The unusual 2020 Arctic ozone hole as seen in the CAMS reanalysis
A reanalysis dataset produced by the Copernicus Atmosphere Monitoring service (CAMS reanalysis, 2003 - present day) augmented by ERA5 data for the years before 2003 is used to des…
Heat production and tidally driven fluid flow in the permeable core of Enceladus
Saturn’s moon Enceladus has a global subsurface ocean and a porous rocky core in which water-rock reactions likely occur; it is thus regarded as a potentially habitable environmen…
Trends in Ship-Reported Oceanic Precipitation Frequency from 1958 through 2014
57 years of qualitative ship-board weather reports are used to assess apparent trends in precipitation occurrence over the global oceans. Positive trends of up to ~15% per decade,…
Estimating bedload from suspended load and water discharge in sand bed rivers
Estimates of fluvial sediment discharge from in situ instruments are an important component of large-scale sediment budgets that track long-term geomorphic change. Suspended sedim…
Stress release process along an intraplate fault analogous to the plate boundary: a case study of the 2017 M5.2 Akita-D…
Stress accumulation and release in the crust remains poorly understood compared to that at the plate boundaries. Spatiotemporal variations in foreshock and aftershock activities c…
Moisture sources and transport control year-round variations of stable isotopes in precipitation over Bangladesh
Indian summer monsoon (ISM) has profound impact on water resources over the Asian Water Towers (AWTs) and surroundings. Stable isotopes in precipitation (δO and δD) are crucial tr…
Understanding the influence of climate variability on surface water hydrology in the Congo basin
Understanding the impacts of climate on surface water hydrology is required to predict consequences and implications on freshwater habitats, ecological assets, and wetland functio…
Optimization of Magnetic Flux Ropes Modeled with the RBSL Method
The so-called regularized Biot-Savart laws (RBSLs, Titov et al. 2018) provide an efficient and flexible method for modeling pre-eruptive magnetic configurations whose characterist…
Impact Generation of Sugar Molecules and Survival of Glycolaldehyde
Glycolaldehyde (GLA), a two-carbon sugar precursor, has been detected in multiple regions in our galaxy and on comets in our solar system. Impact experiments conducted at the Expe…
Options for increased soil carbon storage and water holding capacity through sustainable agriculture and forestry: mode…
Sustainable agriculture and forestry is an important topic under climate change. This is a potential route for increasing long-term soil and biomass carbon storage, soil water ret…
Characterizing methane emission hotspots from thawing permafrost
Methane (CH 4 ) emissions from climate-sensitive ecosystems within the northern permafrost region represent a large but highly uncertain source, with current estimates spanning a …
Improvements to the fracture pipe network model for complex 3D discrete fracture networks
Fractures widely exist in the subsurface and play a critical role in transport processes in porous media. The Fracture Pipe Network Model (FPNM) is an efficient method to represen…
Revealing causal controls of storage-streamflow relationships with a data-centric Bayesian framework combining machine …
Some machine learning (ML) methods such as classification trees are useful tools to generate hypotheses about how hydrologic systems function. However, data limitations dictate th…
Circulation around and atop the Seychelles Plateau
The ocean circulation around and over the Seychelles Plateau is characterized using 35 months of temperature and velocity measurements and a numerical model of the region. The res…
Energy Balance and Time Dependence of a Magnetotail Electron Diffusion Region
We examine the July 11th, 2017 electron diffusion region (EDR) observed by the Magnetospheric Multiscale (MMS) mission using Poynting’s theorem. The terms in Poynting’s theorem ar…
A generalized interpolation material point method for shallow ice shelves. Part II: anisotropic nonlocal damage mechani…
Ice shelf fracture is responsible for roughly half of Antarctic ice mass loss in the form of calving and can weaken buttressing of upstream ice flow. Large uncertainties associate…
Regional ionospheric parameter estimation by assimilating the LSTM trained results into the SAMI2 model
This paper presents a study on the possibility of predicting the regional ionosphere at mid-latitude by assimilating the predicted ionospheric parameters from a neural network (NN…
Azimuth-, angle-and frequency-dependent seismic velocities of cracked rocks due to squirt flow
Understanding the properties of cracked rocks is of great importance in scenarios involving CO 2 geological sequestration, nuclear waste disposal, geothermal energy , and hydrocar…
A New Hybrid Water Balance and Machine Learning Approach for Groundwater Withdrawal Prediction using Integrated Multi-T…
Effective monitoring of groundwater withdrawals is necessary to help mitigate the negative impacts of aquifer depletion. In this study, we develop a holistic approach that combine…
Squeezing water from a stone: H2O in nominally anhydrous minerals from granulite xenoliths and deep, hydrous fractional…
Although ~10% of Earth’s water resides within continents, HO distribution throughout the continental lithosphere and partitioning of HO in nominally anhydrous minerals (NAMs) rema…
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