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Showing 11201 to 11250 of 22070 works
Magnetospheric Coherent Structures in 3D Global MHD Simulations Focusing on Alfvenic Kármán Vortex Dynamics
10 Magnetospheric coherent structures related to the dynamics of the dayside 11 magnetopause frontier for a northward IMF configuration, are analyzed using global 3D 12 MHD simula…
Site Suitability Analysis for Intensive Livestock Production in South Australia'
Intensive meat production possess environmental and socioeconomical threats to the society. This study represents the identification of the suitable site of the intensive poultry …
Processes Controlling Thermal Regimes of Secondary Channel Features in a Large, Gravel-bed River, Willamette River, Ore…
The thermal regime of rivers plays a key role in aquatic ecosystem health. In the Willamette River, OR, main channel temperatures can be too warm for cold water fishes, causing fi…
Benchmark calculations of radiative forcing by greenhouse gases
Changes in the concentration of greenhouse gases within the atmosphere lead to changes in radiative fluxes throughout the atmosphere. The value of this change, called the instanta…
A Comparison of Radial Diffusion Coefficients in 1-D and 3-D Long-Term Radiation Belt Simulations
Radial diffusion is one of the dominant physical mechanisms driving acceleration and loss of radiation belt electrons. A number of parameterizations for radial diffusion coefficie…
Geological factors impacted cadmium availability and use as an alternative cofactor for zinc in the carbon fixation pat…
Transition metal cofactors are crucial for many biological processes. Despite being primarily considered to be toxic, the transition metal cadmium (Cd) was discovered to be a subs…
Variations of the Heppner-Maynard Boundaries on Northern Hemisphere Measured by SuperDARN During the Extremely Radial I…
The Heppner-Maynard Boundary (HMB) represents the equatorward extent of the ionospheric convection pattern and can be used as a proxy for the low latitude of the auroral oval. We …
ChinaSpec: a Network for Long-term Ground-based Measurements of Solar-induced Fluorescence in China
Remotely sensed solar-induced fluorescence (SIF) has emerged as a novel and powerful approach for terrestrial vegetation monitoring. Continuous measurements of SIF in synergy with…
On the problem of tsunami run-up to a flat shore
When a tsunami wave comes from the ocean and propagates through the shelf, it is necessary to predict the maximum flooding of the coast, the height of the tsunami on the coast, th…
Physical properties and gas hydrate at a near-seafloor thrust fault, Hikurangi Margin, New Zealand
The Pāpaku fault zone, drilled at IODP Site U1518, is an active splay fault in the frontal accretionary wedge of the Hikurangi Margin. In logging-while-drilling data, the 33 m-thi…
An Alternate Method for Earthquake Source Characterization through Empirical Mode Decomposition and Spectral Analysis o…
The occurrence of a large number of earthquakes in the inter and intraplate settings of the Japan Trench leads to ruptures with varying frequencies. To capture the temporal distri…
Parker Solar Probe FIELDS instrument charging in the near Sun environment: Part I - Computational Model
The Spacecraft Interaction Plasma Software package (SPIS), a three-dimension particle in cell (PIC) code, was used to model the Parker Solar Probe (PSP) spacecraft and FIELDS inst…
Impact of textural patterns on rock weathering rates and size distribution of weathered grains
Rock texture has a critical influence on the way rocks weather. The most important textural factors affecting weathering are grain size and the presence of cracks and stylolites. …
Control of Permafrost and Seasonal Frost on Stream and Groundwater Interactions in Alpine Catchment, Northeastern Tibet…
The role of groundwater in maintaining streamflow in the alpine area with distribution of permafrost and seasonal frost is a poorly studied topic of considerable interest. The str…
Implication of tidal forcing effects on the zonal variation of solstice equatorial plasma bubbles
Equatorial plasma bubbles (EPBs) are elongated plasma depletions that can occur in the nighttime ionospheric F region, causing scintillation in satellite navigation and communicat…
A first comparison between ionospheric and surface level magnetic fields at Mars
With both the Mars Atmosphere and Volatile Evolution (MAVEN) mission and the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission concur…
ED042-02 - Teaching Undergraduates to Build Spacecraft During The Covid-19 Lockdown
The Undergraduate Student Instrumentation Project (USIP) was a NASA program to engage undergraduate students in rigorous scientific research, for the purposes of innovation and de…
CYCLONE TRACK ANALYSIS BASED ON 10 YEARS OF SYNOPTIC CHARTS FOR THE SOUTHWESTERN ATLANTIC (METAREA V)
Extratropical cyclones are weather phenomena with significant transfer of energy between the surface (over the ocean or on land) and the atmosphere. Recurrently, reanalysis data a…
Hydrothermal Alteration on Composite Volcanoes -Mineralogy, Hyperspectral Imaging and Aeromagnetic Study of Mt Ruapehu,…
Prolonged volcanic activity can induce surface weathering and hydrothermal alteration that is a primary control on edifice instability, posing a complex hazard with its challenges…
A Unified Framework for Extreme Sub-daily Precipitation Frequency Analyses based on Ordinary Events
The metastatistical extreme value approach proved promising in the frequency analysis of daily precipitation from ordinary events, outperforming traditional methods based on sampl…
Experimental Determination of the Conditions Associated with “Zebra Stripe” Pattern Generation in the Earth’s Inner Rad…
The “zebra stripes” are peaks and valleys commonly present in the spectrograms of energetic particles trapped in the Earth’s inner belt. Several theories have been proposed over t…
Is it worthwhile to invest in learning? A stormwater management case study with 1 green infrastructure using Bayesian-b…
To cope with the uncertainty of green infrastructure planning at city scale, many cities take an adaptive approach and use learning-by-doing to improve understanding of the urban …
Variation in NO 2 , AOD and O 3 concentrations in Italy during COVID-19 outbreak
The outbreak of novel coronavirus pandemic has caused problems all over the world. Many people all over the world have lost their lives due to the severeness of the disease. The o…
Seasonal Variation of Legacy Organochlorine Pesticides (OCPs) from East Asia to the Arctic Ocean
Large-scale field investigations of 7 legacy organochlorine pesticides (OCPs) in the surface seawater and atmosphere from East Asia to the high Arctic Ocean were completed in 2017…
Forecast Flood Inundation Mapping at Continental Scale from National Water Model River Discharges
The National Water Center (NWC), part of the National Weather Service’s (NWS) Office of Water Prediction (OWP), seeks to provide forecast flood inundation maps (FIM) as services a…
Drought stress affects asymbiotic nitrogen fixation in Pacific Northwest prairies
Background/Question/Methods This project attempts to quantify the resilience of prairie ecosystems to climate change in the Pacific Northwest (PNW). In this region, prairie ecosys…
Statistical Modeling and Characterization of Induced Seismicity within the Western Canada Sedimentary Basin
In western Canada, there has been an increase in seismic activity linked to anthropogenic energy-related operations including conventional hydrocarbon production, wastewater fluid…
F region electric field effects on the intermediate layer dynamics during the evening prereversal enhancement at the eq…
Using ionograms from the Brazilian equatorial region of São Luís (SL, 2° S; 44° W, I =-3.8°), the relation between the uplift of the intermediated layers (ILs) at sunset and the p…
Gravity Wave Activity in the Atmosphere of Mars During the 2018 Global Dust Storm: Simulations With a High-Resolution M…
Gravity wave activity in the lower and middle atmosphere of Mars during the global dust storm of 2018 has been studied for the first time using a high-resolution (gravity wave res…
Finding SEIS North on Mars: Comparisons between SEIS sundial, Inertial and Imaging measurements and consequences for se…
In this paper, we present the results obtained in the determination of the true North direction on Mars by using a gnomon on the InSight mission and compare the measurements with …
Present-day and Long-term Uplift Across the Western Transverse Ranges of Southern California
It has been known for decades that the present-day shortening rates across the Western Transverse Ranges (WTR) in southern California are rapid, reaching 10-15 mm/yr near the heav…
Classification for the Determination of Estimation Domains in a Cu-Zn Skarn Deposit in Central Peru, New Approach using…
The Ore-control block-model in an open pit mine constitutes the final outcome after rigorous analysis and interpretations of a wide range of geological data. Moreover, modeling di…
Land Surface Temperature Mapping and Analysis of Moss Banks on the Western Antarctic Peninsula using a multi-sensor UAV
Climate change is impacting polar regions at an accelerated rate, causing rapid changes in land cover and biodiversity. One case is the “greening up” of the Western Antarctic Peni…
Lower Tropospheric Processes; A Control on The Global Mean Precipitation Rate
The spread in global mean precipitation among climate models is explored in two ensembles using the complementary perspectives of surface evaporation and energy budgets. Models wi…
Challenges and Successes of Implementing NOAA/NESDIS/NCEI’s Ingest of Archival Data in a Cloud Environment
Since its formation in 2015, the National Centers for Environmental Information (NCEI) has used disparate, legacy systems spread across several IT networks of the National Environ…
Remote sensing retrieval of isoprene concentrations in the Southern Ocean
Isoprene produced by marine phytoplankton acts as a precursor of secondary organic aerosol and thereby affects cloud formation and brightness over the remote oceans. Yet, the mari…
Stochastic Storm Simulation Using Optimal Estimation and Non-Parametric Generation of Ensemble Parameters
The historical record of rainfall observation rarely provides sufficient record length and resolution required in many applications. The work described here presents a stochastic …
Contrasting regional carbon cycle responses to seasonal climate anomalies across the east-west divide of temperate Nort…
Across temperate North America, interannual variability (IAV) in gross primary production (GPP) and net ecosystem exchange (NEE), and their relationship with environmental drivers…
The 2020 Mw 6.8 Elaziğ (Turkey) earthquake reveals rupture behavior of the East Anatolian Fault
The 2020 Mw 6.8 Elazig earthquake was the largest along the Eastern Anatolian Fault (EAF) in over a century, providing valuable insights into its rupture behavior. We use satellit…
Dependence of Convective Dynamo Action on Bulk Electrical Conductivity
Convective dynamo action may be fundamentally different between low-mass and high-mass stars due to a dichotomy in their bulk electrical conductivities relative to kinematic visco…
Statistical characteristics of Arctic forecast busts and their relationship to Arctic weather patterns in summer
Operational numerical weather predictions (NWPs) have been improved considerably over recent decades; however, they still occasionally generate large forecast errors referred to a…
SIHLA , a Mission of Opportunity to L1 to Map H Lyman Alpha Emissions from the Heliopause, the Interplanetary Medium, t…
SIHLA (Spatial/Spectral Imaging of Heliospheric Lyman Alpha pronounced as ‘Scylla’ [e.g. Homer, Odyssey, ~675-725 BCE] investigates fundamental physical processes that determine t…
Correcting an error in some interpretations of 14C data
A misunderstanding of the definition of the variable “Delta14C” , commonly used in radiocarbon dating and tracing applications to quantify 14C levels, has led at least thee author…
The initial stage of cloud lightning imaged in high-resolution
With LOFAR we have been able to image the development of lightning flashes with meter-scale accuracy and unprecedented detail. We discuss the primary steps behind our most recent …
Distributed Acoustic Sensing (DAS) as a Distributed Hydraulic Sensor in Fractured Bedrock
Distributed Acoustic Sensing (DAS) was originally intended to measure oscillatory strain at frequencies of 1 Hertz or more on a fiber optic cable. Recently, measurements at much l…
Magnetic Field Measurement Suite for CubeSat Applications
A magnetic field measurement suite intended for CubeSat and ground-based geomagnetic applications is presented. The system is composed of commercial-off-the-shelf sensors (COTS), …
Near complete local reduction of Arctic stratospheric ozone by severe chemical loss in spring 2020
In the Antarctic ozone hole, ozone mixing ratios have been decreasing to extremely low values of 0.01-0.1 ppm in nearly all spring seasons since the late 1980s, corresponding to 9…
The disappearing lake: An historical analysis of drought and the Salton Sea in the context of the Planetary Health/GeoH…
The Imperial Valley region of Southeastern California has become one of the most productive agricultural regions in the state. It also has the highest rates of childhood asthma in…
The Great Green Reset of Global Economies: A Golden Opportunity for Environmental Change and Social Rehabilitation
A globally interactive geo-socioeconomic revolution will be necessary in order to sustainably resource our continued our ways of life and be able to expand beyond to the next gian…
Deep Water Cycling and the Multi-Stage Cooling of The Earth
Paleo-temperature data indicates that the Earth’s mantle did not cool at a constant rate over geologic time. The data are consistent with slow cooling from 3.8 to ~2.5 billion yea…
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