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Showing 6751 to 6800 of 59105 works
Discovering the research needs of current and potential partners and collaborators for NASA’s Arctic Boreal Vulnerabili…
The Arctic Boreal Vulnerability Experiment (ABoVE) is a NASA Terrestrial Ecology field campaign comprised of researchers from many disciplines and institutions who use field-based…
A Magnitude Estimation Approach and its Application to the Yunnan Earthquake Early Warning Network
Estimating the magnitude by P waves is important for issuing the earliest message to the general public during earthquake early warning (EEW). First, we reviewed part of the magni…
Retreat of the Great Escarpment of Madagascar from Geomorphic Analysis and Cosmogenic 10Be Concentrations
The eastern margin of Madagascar has a prominent relief change from the flat coastal plain to the low-relief high plateau, characterizing a typical great escarpment topography at …
Impacts of Vegetation on Dryland River Morphology: Insights from Spring-Fed Channel Reaches, Henry Mountains, Utah
A better understanding of how vegetation influences alluvial channels could improve (a) assessments of channel stability and flood risks, (b) applications of vegetation as a river…
Understanding the Dynamics of the Cloud-Level Atmosphere on Venus and Venus Analog Exoplanets Using a Middle Atmosphere…
Venus is comparable to the Earth in size and overall distance from the Sun, but is outside of a defined “habitable zone” in which water can exist in liquid form. The deep atmosphe…
Mixing Downstream of Stream Confluences Alters Carbon and Nutrient Cycling in Freshwater Networks
Stream confluences are ubiquitous features in freshwater networks, have distinct hydrogeomorphic characteristics relative to upstream tributaries and downstream reaches, and serve…
Estimating the Rate of Change of Stratospheric Ozone using Deep Neural Networks
We present a fast model for stratospheric ozone chemistry based on a neural network approach. The model is intended to replace the detailed chemistry schemes of chemistry and tran…
Assessing the Trustworthiness of Crowdsourced Rainfall Networks: A Reputation System Approach
High resolution and accurate rainfall information is essential to modeling and predicting hydrological processes. Crowdsourced personal weather stations (PWSs) have become increas…
Stress Drop Variations in the Region of the 2014 MW8.1 Iquique Earthquake, Northern Chile
We compute stress drops from P and S phase spectra for 534 earthquakes in the source region of the 2014 MW 8.1 Iquique megathrust earthquake in the northern Chilean subduction zon…
Improving Walnut (J. regia) Kernel Color Analyses
Traditionally, walnut kernel color is scored by a human on a four-point color scale ranging from extra light to Amber, developed by the California DFA. Two important reasons for u…
Residence Times of Sediments in Large Rivers Quantified Using a Cosmogenic Nuclides Based Transport Model and Implicati…
The weathering of continental surfaces and the transport of sediments via rivers into the oceans is an integral part of the dynamic processes that shape the Earth’s surface. To un…
Dynamics of the deadly snow avalanche of January 18, 2017 at Rigopiano (Central Italy)
On January 2017, a snow avalanche devastated a Resort-hotel in the municipality of Rigopiano in Abruzzo (Central Italy), unfortunately, burying alive 40 people. In a dramatic resc…
Decoupled cooling and exhumation signals in subduction orogens: An example from the Argentinean Pampean Ranges
Reconstructing thermal histories in thrust belts using thermochronometry is a widely used method to infer the age and rates of thrusting, a precondition to understanding the drivi…
The fine-scale structure of Long Beach, California, and its impact on ground motion acceleration
The metropolitan Los Angeles region represents a zone of high-seismic risk due to its proximity to several fault systems, including the San Andreas fault. Adding to this problem i…
Crystal and volatile controls on the mixing and mingling of magmas
The mixing and mingling of magmas of different compositions are important geological processes. They produce various distinctive textures and geochemical signals in both plutonic …
Projected Hydroclimate Changes Driven by Carbon Dioxide Trends and Vegetation Modeling in CMIP6
Past and projected changes in global hydroclimate in Earth system models have been examined. The Budyko framework that relates the partitioning of precipitation into evaporation t…
Meteotsunami observed by the deep-ocean seafloor pressure gauge network off northeastern Japan
Recent developments in ocean-bottom pressure gauge (OBP) networks have enabled us to continuously monitor various waves in the ocean. On 1 July, 2020, an OBP network, S-net, recor…
Uncertainty in Future Projections of Water Deficit Droughts Based on Evapotranspiration Methods in the Indian Subcontin…
The choice of reference evapotranspiration (ETo) estimation methods and general circulation model (GCM) are crucial for projecting water deficit under a changing climate. Standard…
PIV for Peanuts - a Low Cost Particle Image Velocimetry System to Observe Terminal Velocity in Suspensions
Particle Image Velocimetry (PIV) is a proven technique for the observation of flow or particle motion in fluids. A pulsed laser is used to create a thin plane of light in the flui…
Regional transport of PM2.5 and O3 based on complex network method and source apportionment technology in the Yangtze R…
Ground-level ozone(O 3 ) and atmospheric fine particulate matter (PM 2.5 ) pollution are the major challenges for continually improving air quality in the Yangtze River Delta (YRD…
Annealing zircon with zoned radiation damage distribution and implications for (U-Th)/He thermochronology
Radiation damage in zircon directly impacts diffusion of He from the crystal lattice and is a key factor in defining the kinetics of the zircon (U-Th)/He system. Damage accumulate…
Magnetic Fabric Signature within a Thrust Imbricate; an analogue modelling approach
In this study, we report results from three analogue models with similar initial setup and different amounts of bulk shortening, to simulate a development of a pop-up structure in…
Water loss during the Mars Year 34 C Storm
Lower atmosphere variations in the martian water vapour and hydrogen abundance during the Mars Year (MY) 34 C storm from L S =326.1 ◦ -333.5 ◦ and their associated effect on hydro…
A Dynamic Socio-hydrological Model of The Irrigation Efficiency Paradox
Improving irrigation efficiency (IE) is conventionally perceived as a water-conserving practice in the agriculture sector. The common understanding is that increased on-farm IE le…
The Role of Magma Storage Conditions and Excess Fluids in the Effusive to Explosive Eruption Styles
We investigate the role of pre-eruptive magma conditions in controlling eruption styles at basaltic andesite volcanoes, and their relationship to monitoring data. We focus on a cy…
Tracing glacial meltwater from the Greenland Ice Sheet to the ocean using gliders
The Greenland Ice Sheet (GrIS) is experiencing significant mass loss and freshwater discharge at glacier fronts. The freshwater input from Greenland will impact the physical prope…
Conceptualizing Pollutant Load Generation from Urban Catchments
Urbanization increases runoff, sediment, and nutrient loadings to freshwaters, causing flooding, harmful algal blooms, and increased costs for drinking water filtration. Most wate…
The Determination of the Rotational State and Interior Structure of Venus with VERITAS
Understanding the processes that led Venus to its current state and will drive its future evolution is one of the main challenges of the next generation of space missions. In this…
Non-linear world - a shift from linear to non-linear modelling of natural environments
Majority of currently applied environmental models relay on linear relations between environmental endmembers. In this research, a detailed and comprehensive comparison between li…
Global Flash Drought Monitoring using Surface Soil Moisture
Flash droughts are characterized by an abrupt onset and swift intensification. Global surface soil moisture (θRS) from NASA’s Soil Moisture Active Passive (SMAP) satellite can fac…
Conceptualization of Sediment Transfers Between Macrotidal Estuaries and Coastal Seas
Sediment fluxes at the estuary-sea interface modulate estuary morphologies and impact particle matter exchanges between marine and continental sources along the land-sea continuum…
Open source satellite derived bathymetry module for NASA Ames Stereo Pipeline
The NASA Ames Stereo Pipeline (ASP) is an open source software of automated geodesy and photogrammetry tools to process satellite, aerial camera, and historical imagery with and w…
PROBA2 LYRA Occultations: Thermospheric Temperature and Composition, Sensitivity to EUV Forcing and Comparisons with Ma…
A method is presented for retrieving temperature and composition from 150-350 km in Earth’s thermosphere using total number density measurements made via EUV solar occultations by…
Modeling the economic and environmental impacts of land scarcity under deep uncertainty
Land scarcity is increasing over time, driven by complex multi-sector dynamics. The impacts of land scarcity on the economy and environment are multi-faceted and regional, so any …
Mission Configuration and Retrieval Technique for Profiling Water Vapor in the Marine Boundary Layer
Profiling water vapor in the marine boundary layer (MBL) is critical to marine weather prediction, maritime communications, and understanding feedbacks relevant to multi-decadal c…
Augmentation and Use of WRF-Hydro to Simulate Overland Flow- and Streamflow-Generated Debris Flow Hazards in Burn Scars
In steep wildfire-burned terrains, intense rainfall can produce large volumes of runoff that can trigger highly destructive debris flows. The ability to accurately characterize an…
Comparison of biotite elastic properties recovered by spherical nanoindentations and atomistic simulations - influence …
Phyllosilicate minerals, due to their sheets structure and morphology, are known to cause anisotropy in bulk rock properties and make the bulk rock more compliant. Accurately char…
The Indian Ocean Geoid Low at a plume-slab overpass
The Indian Ocean Geoid Low (IOGL) appears as a prominent feature if the geoid is, as usual, shown with respect to the Earth’s reference shape. However, if it is shown relative to …
Ground Level Enhancement Events: Interplanetary Protons versus Protons Interacting at the Sun.
We compare results of the solar high-energy proton detection with the neutron monitor network in Ground Level Enhancement (GLE) events and the data of pion-decay gamma-ray emissio…
Wetland Dynamics and Morphological Changes due to Hurricane-induced Sediment Deposition
Wetlands are endangered ecosystems that provide valuable services to society and contribute to maintaining biodiversity in low-lying areas. Hurricanes, among other stressors such …
Inter-analyst comparison and reproducibility of apatite fission track analysis
Factors influencing data reproducibility of fission-track (FT) thermochronology can be summarized into three main categories associated with data acquisition steps. (1) Sample pre…
The Arctic Carbon Monitoring and Forecasting System: a novel forecasting framework to build new understanding and reduc…
In light of the magnitude and pace of the environmental changes in the northern permafrost zone (NPZ) and their feedbacks to climate, contemporary, accurate and quantitative ecolo…
Imaging Spectroscopy Processing Environment on the Cloud (ImgSPEC): A Prototype of an Open Science, Scalable Processing…
Imaging spectroscopy data is becoming more readily available from different satellite and airborne platforms. As this data becomes more prolific, there is a need for shared data t…
Observation-Based Constraints on Modeled Aerosol Surface Area: Implications for Heterogeneous Chemistry
Heterogeneous reactions occurring at the surface of atmospheric aerosol particles regulate the production and lifetime of a wide array of atmospheric gases. Aerosol surface area p…
Decomposition and Inference of Sources through Spatiotemporal Analysis of Network Signals: The DISSTANS Python Package
Regional-scale, continuously-operating Global Navigation Satellite System (GNSS) networks are a powerful tool to monitor plate motion and surface deformation. Since their inceptio…
Idealized large-eddy simulations of stratocumulus advecting over cold water. Part 1: Boundary layer decoupling
We explore the decoupling physics of a stratocumulus-topped boundary layer (STBL) moving over cooler water, a situation mimicking the warm air advection (WADV). We simulate an ini…
Role of the Solar Minimum in the Waiting Time Distribution Throughout the Heliosphere
Many processes throughout the heliosphere such as flares, CMEs, storms and substorms have abrupt onsets. The waiting time between these onsets provides key insights as to the unde…
True Gravity in Atmospheric Ekman Layer Dynamics
True gravity is a three-dimensional vector, g = igλ+jgφ+kgz, with (λ, φ, z) the (longitude, latitude, height) and (i, j, k) the corresponding unit vectors. The vertical direction …
Real-time 3-D modeling of the ground electric field due to space weather events. A concept and its validation
We present a methodology that allows researchers to simulate in real time the spatiotemporal dynamics of the ground electric field (GEF) in a given 3-D conductivity model of the E…
Sulfate quantification on Ocean Worlds from frozen sodium sulfate brines examined by Raman spectroscopy
Raman spectroscopy is a promising analytical technique for in situ characterization of the icy mineral context on the surfaces of Ocean Worlds. This technique is highly sensitive …
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