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Showing 8101 to 8150 of 59105 works
Accessing the subsurface biosphere within rocks undergoing active low-temperature serpentinization in the Samail ophiol…
The Oman Drilling Project established an “Active Alteration” multi-borehole observatory in dunite and harzburgite undergoing low-temperature serpentinization in the Samail ophioli…
Dart-Leader and K-Leader Velocity From Initiation Site to Termination Time-Resolved with 3D Interferometry
Simultaneous data from two interferometers separated by 16 km and synchronized within 100 ns was collected for a thunderstorm near Langmuir Lab on October 23, 2018. Analysis via t…
Shallow Thermocline Bias in the Southern Tropical Pacific in CMIP5/6 Models
A basin-wide significant shallow bias is found in the southern tropical Pacific thermocline in an ensemble of models from the coupled model intercomparison project phases 5 and 6.…
Ocean Bottom Seismometers for Passive Acoustic Monitoring of Baleen Whales
Over the last decade, the opportunistic use of broadband Ocean Bottom Seismometer (OBS) recordings has been extremely beneficial for baleen whales studies as they regularly record…
Diesel passenger vehicle shares influenced COVID-19 changes in urban nitrogen dioxide pollution
Diesel-powered vehicles emit several times more nitrogen oxides than comparable gasoline-powered vehicles, leading to ambient nitrogen dioxide (NO2) pollution and adverse health i…
The physics behind the hypothesis of alternation
The hypothesis of alternation leads to the idea of immunity after local disaster which, notwithstanding it sounds reasonable, it has been frequently rejected by objective testing.…
“We have been the ladder and held the ladder”: Evolving GeoHealth models for actionable, community-engaged research
GeoHealth as a research paradigm offers the opportunity to re-evaluate common research engagement models and science training practices. GeoHealth challenges are often wicked prob…
Benchmarking iSALE and CTH shock physics codes to in situ high-velocity impact experiments into Fe-Ni targets
Cratering is a prominent evolutionary process on asteroids. Crater morphologies, regolith generation, bulk fracturing and projectile implantation are all examples of asteroidal su…
Future Water Supply Projections in Ethiopia Under Climate Change Using NASA NEX-GDDP and LDAS Simulations
Ethiopia’s socioeconomic development is strongly dependent on both its natural resources and hydroclimatic dynamics. Current and projected effects of climate change and variabilit…
A Non-gradient Model of Turbulent Gas Fluxes over Land Surfaces
A novel non-gradient model is formulated for estimating gas fluxes using single-level time-series data of near-surface gas concentration over land surfaces. When the vertical turb…
Similarities and differences between meandering and anabranching rivers
Amazonian rivers are highly interconnected and dynamic systems. Their behavior depends, to a large extent, on their geomorphology, being classified in 1) meandering rivers (MR), c…
Salt and Water Migration in Mars Duricrust Desiccation Experiments
We have measured the salt content changes of soil samples in laboratory experiments to simulate the salt and water migration that may cause duricrust formation on Mars. Although t…
Resonance frequency as a proxy for vulnerability as well as hazard assessment in the context of recent 6.4 Assam earthq…
We report here a preliminary investigation on site effects in a highly populated zone of academic importance. The study area is mostly characterized by its alluvial sediments. Due…
Retreat of the Antarctic Ice Sheet during the Last Interglaciation and implications for future change
The Antarctic Ice Sheet (AIS) response to past warming consistent with the 1.5–2°C ‘safe limit’ of the United Nations Paris Agreement is currently not well known. Empirical eviden…
Preemptive Detection of High Water-Cut Wells in Delaware Basin using a Joint Unsupervised and Supervised Learning Appro…
High water cut has been an issue in the Delaware basin for many years now. Volume of produced water continue to increase, resulting in adverse environmental impacts and higher res…
Long Term study of the Schumann Resonance Regular Variations Using the Sierra Nevada station ground-based magnetometers
We present a study of the Schumann Resonance (SR) regular variations (March 2013-February 2017) using the ground-based magnetometers from the Sierra Nevada station, Spain (37◦02’N…
Iron-phosphorus feedbacks drive multidecadal oscillations in Baltic Sea hypoxia
Hypoxia has occurred intermittently in the Baltic Sea since the establishment of brackish-water conditions at ~8000 years B.P., principally as recurrent hypoxic events during the …
Bias Corrected Estimation of Paleointensity (BiCEP): An improved methodology for obtaining paleointensity estimates
The assumptions of paleointensity experiments are violated in many natural and archaeological materials, leading to Arai plots which do not appear linear and yield inaccurate pale…
High and variable drag in a sinuous estuary with intermittent stratification
In field observations from a sinuous estuary, the drag coefficient C, much greater than expected from bottom friction alone. C are explained by form drag from flow separation at s…
Offshore Tsunami Deposits: Evidence from Sediment Cores and Numerical Wave Propagation of the 1601 CE Lake Lucerne Event
The 1601 Common Era earthquake (Mw ca. 5.9) in “Unterwalden”, Central Switzerland triggered multiple subaqueous mass movements and a subaerial rockfall that generated tsunami wave…
The impact of sea-ice drift and ocean circulation on dispersal of toothfish eggs and juveniles in the Ross Sea and Amun…
Knowledge about the early life history of Antarctic toothfish ( Dissostichus mawsoni ) is still incomplete, particularly on the spatial and temporal extent of spawning and the sub…
Response of Southern Hemisphere western boundary current regions to future zonally symmetric and asymmetric atmospheric…
Subtropical Western Boundary Currents (WBCs) are often associated with hotspots of global warming, with certain WBC extension regions warming 3-4 times faster than the global mean…
Hierarchical Bayesian inversion of global variables and large-scale spatial fields
Bayesian inversion is commonly applied to quantify uncertainty of hydrological variables. However, the focus in Bayesian inversion is more on spatial hydrological properties inste…
Estimating radiative forcing with a nonconstant feedback parameter and linear response
A new algorithm is proposed for estimating time-evolving global forcing in climate models. The method is a further development of the work of Forster et al. (2013), taking into ac…
The top-of-atmosphere, surface and atmospheric cloud radiative kernels based on ISCCP-H datasets: method and evaluation
This study aims to create observation-based cloud radiative kernel (CRK) datasets and evaluate them by direct comparison of CRK and the CRK-derived cloud feedback datasets. Based …
Intense Subsurface Upwelling Associated with Major Western Boundary Currents
Western boundary currents (WBCs) play an essential role in regulating global climate. In contrast to their widely examined horizontal motions, less attention has been paid to vert…
Did the COVID-19 Lockdown Impact New York Harbor's Water Quality?
Waterways such as the Hudson River play an integral role in agriculture, health, transportation, recreation, energy, and sustaining biodiversity. Although water pollution in New Y…
Anthropogenic effects on the contemporary sediment budget of the lower Rhine-Meuse Delta channel network
Deltas and estuaries worldwide face the challenge of capturing sufficient sediment to keep up with relative sea level rise. Knowledge about sediment pathways and fluxes are crucia…
Correction of river bathymetry parameters using the stage-discharge rating curve
River bathymetry is an important parameter for hydrodynamic modeling; however, it is associated with large bias because direct large-scale measurements are impractical. Recent stu…
Testing Ionospheric influence on Substorm Onset Location
Substorm onset location varies over a range of magnetic local times (MLTs) and magnetic latitudes (MLats). Different studies have shown that about 5${\%}$ of the variation in onse…
Measuring Very Small Soil Fluxes of N2O & CH4 using a New OF-CEAS Technology
N 2 O and CH 4 soil flux studies traditionally consider certain time periods and certain ecosystems to be of low importance due to very small or negligible expected flux rates. Pe…
Magma storage at Ocean Islands: insights from Cape Verde
The Cape Verde archipelago is a group of Ocean Islands in the Central Atlantic that forms two chains of islands trending Northwest and Southwest. Several of the islands are consid…
Frictional and Lithological Controls on Shallow Slow Slip at the Northern Hikurangi Margin
Slow slip events (SSEs) have been identified at subduction zones globally as an important link in the continuum between elastodynamic ruptures and stable creep. The northern Hikur…
Joint pressure and temperature effects on seismic properties of gneisses and amphibolite
Pressure and temperature change simultaneously in the Earth’s crust from surface to depth. Joint pressure and temperature changes influence many different physical properties. The…
Using Eddy Covariance Method in Disciplines beyond Micrometeorology
Eddy Covariance method has been actively used by expert micrometeorologists for over 30 years, covering 2155 stationary locations globally, and numerous mobile campaigns over land…
Variabilities observed in the vertical polarization electric field associated with electrojet current system during sol…
Using ground based magnetometer data and an in-house developed quasi two dimensional (QTD) theoretical ionospheric model, we investigate differential response of the E region iono…
Quantifying the Impact of Dynamic Storm-Time Exospheric Density on Plasmaspheric Refilling
As soon as the outer plasmasphere gets eroded during geomagnetic storms, the greatly depleted plasmasphere is replenished by cold, dense plasma from the ionosphere. A strong corre…
Seeing Through the Atmosphere of Venus: What’s on the Surface?
The exploration of the surface geology of Venus has been hampered by its inhospitable conditions and thick and opaque atmosphere. Fundamental properties, such as crustal compositi…
Evaluating Variations in Tropical Cyclone Precipitation (TCP) in Eastern Mexico using Machine Learning Techniques
Tropical Cyclone Precipitation (TCP) is one of the major triggers of flash flooding and landslide in eastern Mexico. We apply different statistical and machine learning techniques…
Magma mixing during conduit flow is reflected in melt-inclusion data from persistently degassing volcanoes
Persistent volcanic activity is thought to be linked to degassing, but volatile transport at depth cannot be observed directly. Instead, we rely on indirect constraints such as CO…
Latent heat release dependence on mass flux in trade wind shallow cumulus clouds
We performed LES simulation of tropical cumulus clouds initialized with soundings from the RICO field project (vanZanten et al. 2011, JAMES). Our analysis concentrated on thermody…
Exploring Bisulfide Transport through Bentonite Under Deep Geological Repository Conditions
Management of used nuclear fuel is a major technical challenge faced by nuclear energy producing nations worldwide. In Canada, the Nuclear Waste Management Organization is respons…
After The 2017 Disaster: Villa Santa Lucia And Its Surrounding Glaciers. A Contribution To Resilience From A Glaciologi…
On 16 December 2017 a chain mass movement, started as a rockslide, produced a debris and mud flow which channelized in the Burritos River. The flow reached and flooded the Santa L…
ICESat-2 observations of melt ponds on Arctic sea ice
During the Arctic summer season, snow atop the sea ice melts and pools into low-lying areas on the surface. These melt ponds reduce surface albedo and increase solar absorption in…
Fine-Resolution Mapping of Wetland Inundation Dynamics in the Prairie Pothole Region of the United States
The Prairie Pothole Region of North America is characterized by millions of depressional wetlands, which provide critical habitats for globally significant populations of migrator…
Representing the Dupuit-Boussinesq Aquifer in the National Water Model: Catchment-Scale Application of Hydraulic Ground…
While hydraulic groundwater theory has been understood as a viable approach for representing the role of the aquifer(s) in the surface-subsurface hydrologic cycle, the integrated …
Nowcasting Earthquakes: Imaging the Earthquake Cycle in California with Machine Learning
We propose a new machine learning-based method for nowcasting earthquakes to image the time-dependent earthquake cycle. The result is a timeseries which may correspond to the proc…
Regularizing 3D teleseismic wavefield for receiver function imaging using radial basis function
Receiver function is important for imaging crustal and upper mantle discontinuities. However, sparsely scattered stations would introduce imaging artifacts or even lead to misinte…
Predicting nitrate exposure from groundwater wells using machine learning and meteorological conditions
Private groundwater wells have the potential to be an unmonitored source of contaminants that can harm human health for millions of people throughout the United States. Developing…
The Atmospheric Carbon and Transport (ACT) -America Mission
The Atmospheric Carbon and Transport (ACT) – America NASA Earth Venture Suborbital Mission set out to improve regional atmospheric greenhouse gas (GHG) inversions by exploring the…
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