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Showing 10651 to 10700 of 22070 works
Investigating the nutrient landscape in a coastal upwelling region and its relationship to the biological carbon pump
We investigated nutrient patterns and their relationship to vertical carbon export using results from 38 Lagrangian experiments in the California Current Ecosystem. The dominant m…
Three years of the Lightning Imaging Sensor onboard the International Space Station: Expanded Global Coverage and Enhan…
The Lightning Imaging Sensor (LIS) was launched to the International Space Station (ISS) in February 2017, detecting optical signatures of lightning with storm-scale horizontal re…
The geography of numerical mixing in a suite of global ocean models
Numerical mixing, defined here as the physically spurious diffusion of tracers due to the numerical discretization of advection, is known to contribute to biases in ocean circulat…
The thermodynamic controls on sulfide saturation in silicate melts with application to Ocean Floor Basalts.
A thermodynamic model to calculate the “Sulfide Content at Sulfide Saturation” or SCSS of basaltic and intermediate composition silicate melts has been built from four independent…
Different formation histories between the African and Pacific large low shear-wave velocity provinces as revealed by th…
Global tomographic models have revealed the existence of two large low shear-wave velocity provinces (LLSVPs) underlying Africa and the Pacific, which are regarded as sources of m…
Phytoplankton “Missing” Absorption in Marine Waters: A Novel Pigment Compensation Model for the Packaging Effect
The packaging effect of phytoplankton pigments is sometimes capable of accounting for over half of the variability in the phytoplankton absorption coefficient (aph) in oceanic wat…
TROPOMI NO2 in the United States: A detailed look at the annual averages, weekly cycles, effects of temperature, and co…
Observing the spatial heterogeneities of NO2 air pollution is an important first step in quantifying NOx emissions and exposures. This study investigates the capabilities of the T…
The Impact of IOD on rainfall over Spain
Previous studies have shown that the Indian Ocean Dipole (IOD) has a significant impact on land temperatures over southern Europe. However, whether IOD influences rainfall over th…
Analyzing and Monitoring the Impact of Streamflow Drought on Hydroelectricity Production: A Global-Scale Study
Electricity production by hydropower is negatively affected by drought. To understand, monitor and manage risks of less than normal streamflow for hydroelectricity production (HP)…
Trace metal fractional solubility in size-segregated aerosols from the tropical eastern Atlantic Ocean
Soluble and total trace metals were measured in 4 size fractionated aerosol samples collected over the tropical eastern Atlantic Ocean. In samples that were dominated by Saharan d…
Reducing Surface Wetness Leads to Tropical Hydrological Cycle Regime Transition
The modern “wet” tropics are dominated by the Intertropical Convergence Zone, however “dry” tropics likely occurred in Earth’s history. It is unclear how the tropics change betwee…
Distribution and Mobility of Platinum-Group Elements in the Late Cretaceous Ni-laterite Soil in the Northern Oman Mount…
Low-grade Ni-laterite deposits are well-developed over the mafic/ultramafic protoliths in the northern Oman Mountains. Concentrations, distribution patterns and mobility of platin…
The FAMOS school day: Fostering confidence in a diverse body of early-career polar marine scientists
The Forum for Arctic Modeling and Observational Synthesis (FAMOS) is a project funded by the U.S. National Science Foundation to advance the science of Arctic physical, chemical, …
Perturbation of Electron Velocity Distribution due to Interaction with Chorus Emissions
We present a test particle study of perturbations of a weakly relativistic electron distribution interacting with a rising-tone lower band chorus emission. Trajectories of interac…
Differing Winter Oxygen Regimes in Clear and Turbid Shallow Lakes
Dissolved oxygen controls important processes in lakes, from chemical reactions to organism community structure and metabolism. In shallow lakes, small volumes allow for large flu…
A New Method for Accurate and Efficient Modeling of the Local Ocean Induction Effects. Application to Long-Period Respo…
There is significant interest in constraining mantle conductivity beneath oceans. One data source to probe oceanic mantle conductivity is magnetic fields measured at island observ…
A Nonparametric Statistical Technique for Spatial Downscaling of Precipitation over High Mountain Asia
The accurate representation of the local-scale variability of precipitation plays an important role in understanding the hydrological cycle and land-atmosphere interactions in the…
Wind Tunnel Validation of a Particle Tracking Model to Evaluate the Wind-Induced Bias of Precipitation Measurements.
A physical full-scale experimental set-up was designed and implemented in the wind tunnel to reproduce and capture the trajectories of falling water drops when approaching the col…
No Robust Internal Connection Between Low Frequency North Atlantic and North Pacific Climate Patterns
We analyze the climatic relationship between the North Atlantic and North Pacific ocean basins by cross-correlating their primary low-frequency climate mode indices, Atlantic Mult…
Silylation Protocol for the Analysis of Meteoritic Amides
Carbonaceous chondrite meteorites are fragments of asteroids or comets, that have remained relatively unaltered since the formation of the Solar System. This extraterrestrial mate…
Interaction of climate, vegetation, and water age in catchments across scales and climate zones
Recent studies have demonstrated a direct relation between climate characteristics and vegetation in catchments. For example, plants appear to develop a root system that allows bo…
The Effect of Lorentz Stresses on the Solar Frequency Spectrum: The Forward Problem.
Departures from standard spherically symmetric solar models, in the form of perturbations such as global and local-scale flows and structural asphericities, result in the splittin…
Low latitude Tethyan calcareous nannofossil ocean paleoecology across the early/middle Eocene transition
Calcareous nannoplankton population underwent a major reorganization across the early and middle Eocene. This reorganization was mainly explored from an open ocean perspective, bu…
The evolution of restraining and releasing bend pairs: analogue modelling investigation and application to the Sea of M…
In spite of many specific studies focussing on the Sea of Marmara segment of the North Anatolian Fault (NAF), its deformation and stress accumulation pattern remain difficult to u…
The contribution of large-scale atmospheric patterns to pollution with PM10: the new Saharan Oscillation Index
PM10 has natural and anthropogenic sources, it is an urban air pollutant from desertic areas or emitted by industry and traffic activities, it reduces visibility and threatens hum…
Tsunamis driven by storms and ships: Similarities, differences, and effect of gradients of the pressure field
Small tsunamis caused by a ship and a supercell thunderstorm that occurred on the coast of Norway on 30 June 2019 are compared. Free waves are generated in either case, at shallow…
An ICEBERG Update and Request for Community Input
The ICEBERG (Imagery Cyber-infrastructure and Extensible Building blocks to Enhance Research in the Geosciences) project (NSF 1740595) aims to (1) develop open source image classi…
Evidence of nighttime production of organic nitrates during SEAC4RS, FRAPPE, and KORUS-AQ
Organic nitrates (RONO) are an important NO sink. In rural environments dominated by biogenic emissions, nocturnal NO-initiated production of RONO is competitive with daytime OH-…
Modeling the GABLS4 strongly-stable boundary layer with a GCM parameterization: parametric sensitivity or intrinsic lim…
The representation of stable boundary layers (SBLs) still challenges turbulence parameterizations implemented in current weather or climate models. The present work assesses wheth…
A subgrain-size piezometer calibrated for EBSD
We calibrate a subgrain-size piezometer using electron backscatter diffraction (EBSD) data collected from experimentally deformed samples of olivine and quartz. Systematic analyse…
The effect of the Region 2 currents location on the strength of the auroral electrojet and global distribution of ionos…
In this study, we use a parametrized model of ionospheric electrodynamics to investigate the effect of Region 2 currents’ location on the development and dynamics of the auroral e…
Distributed Acoustic Sensing (DAS) of Seismic Properties in a Borehole drilled on a Fast-Flowing Greenlandic Outlet Gla…
Distributed acoustic sensing (DAS) is a new technology in which seismic energy is recorded at high spatial and temporal resolution along a fibre-optic cable. We show analyses from…
Transient process of channel adjustment to tectonics: Field evidence from Iwaki, Fukushima, Japan
Local base-level change drives the transition of river morphology from one steady state to the new one. Although extracting tectonic information from river steepness assumes stead…
The Water Mass Transformation Framework and Variability in Hurricane Activity
Hurricane activity has been higher since 1995 than in the 1970s and 1980s. This rise in activity has been linked to a warming Atlantic. In this study, we consider variability of t…
Heterogeneity-induced mixing and reaction hotspots facilitate Karst propagation in coastal aquifers
The freshwater seawater mixing zone is a critical region for chemical activity. Yet, little is known about the influence of ever present spatial heterogeneity on the dynamics of m…
Mass and Number Size Distributions of Refractory Black Carbon (rBC) in Snow and Firn Samples from Pine Island Glacier, …
An extended-range Single-Particle Soot Photometer (SP2) coupled to a Marin-5 nebulizer was used to measure the refractory black carbon (rBC) mass and number size distributions in …
Geometric Attributes of Polygonal Crack Patterns in Columnar Joints
A well-ordered polygonal crack pattern is frequently observed on the outcrop surface of columnar joints. The crack pattern's geometry and topology result from the volume contracti…
Moho Depth of Northern Baja California, Mexico, From Teleseismic Receiver Functions
We estimated Moho depth from data recorded by permanent and temporary broadband seismic stations deployed in northern Baja California, Mexico using the receiver function technique…
Energized Oxygen in the Magnetotail: Onset and Evolution of Magnetic Reconnection
Oxygen ions are a major constituent of magnetospheric plasma, yet the role of oxygen in processes such as magnetic reconnection is poorly understood. Observations show that signif…
A stochastic view of the 2020 Elazığ Mw 6.8 earthquake
Until the Mw 6.8 Elazığ earthquake ruptured the central portion of the East Anatolian Fault (EAF) on January 24, 2020, the region had only experienced moderate magnitude (Mw 6.2) …
Fresnel integration \& diffraction amplitude
The Fresnel integral is used in diffraction of wave phenomena. It is demonstrated that the ordinary Fresnel integral has additional yet unkown $\pm 1$ multivaluedness. This result…
Squirt flow in cracks with rough walls
We explore the impact of roughness in crack walls on the P-wave modulus dispersion and attenuation caused by squirt flow. For that, we numerically simulate oscillatory relaxation …
Modeling Seasonal Variability of Arctic Barotropic and Baroclinic Diurnal Tides: Implications for the Tide’s Role in Ev…
Diurnal tidal currents are the dominate contributors to diapycnal mixing in many regions along the pathways for warm Atlantic Water (AW) circulating within the Arctic Ocean along …
Emulating ocean dynamic sea level by two-layer pattern scaling
Ocean dynamic sea level (DSL) change is a key driver of relative sea level (RSL) change. Projections of DSL change are generally obtained from simulations using atmosphere-ocean g…
Quantification of the predisposing role of tectonics and landscape evolution in the occurrence of massive rock failures…
This research focuses on the Loumar deformation which affected the NE slope of the Gavar anticline (Zagros Mts., Iran). The landslide evolution is strictly related to the growth o…
Modeling of the Lower Ionosphere during Solar X-ray Flares of Different Classes
This paper presents the results of modeling the lower ionosphere response to solar X-ray flares of C-, M- and X-classes. The model is based on a 5-component scheme of the ionizati…
Tectonic Landform and Paleoseismic Activity of the Northernmost Sumatran Fault, Aceh Province, Indonesia
The Sumatran fault is an arc-parallel dextral strike-slip fault that accommodates much of the right-lateral component of oblique subduction of the Indian-Australian plate beneath …
Atmospheric Escape Processes and Planetary Atmospheric Evolution
The habitability of the surface of any planet is determined by a complex evolution of its interior, surface, and atmosphere. The electromagnetic and particle radiation of stars dr…
On the origin of particle flux enhancements during Winter months at Aragats
We consider particle flux enhancements occurred during Winter months on Aragats. We demonstrate that these events are originated from Rodon and Thoron chain isotopes gamma radiati…
Impact of recent warming in East Asian marginal seas on the heavy rainfall event occurred in Kyushu Island, Japan in Ju…
There are growing evidences that the warming marginal seas impact the torrential rainfall events in many parts of the world. The sea surface temperature (SST) in the East Asian ma…
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