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Showing 6851 to 6900 of 59105 works
Improved Bathymetric Prediction using Geological Information: SYNBATH
To date, approximately 20% of the ocean floor has been surveyed by ships at a spatial resolution of 400 m or better. The remaining 80% has depth predicted from satellite altimeter…
Paleoenvironmental Reconstruction of the Turkana Basin through pedogenic carbonate analyses (1.9 to 1.2 Ma)
Eastern Africa contains a well-preserved pedogenic carbonate record, useful for contextualizing the paleoenvironment associated with key fossil and archeological evidence. One sig…
Transfer Learning to Build a Scalable Model for the Declustering of Earthquake Catalogs
The rate of background seismicity, or the earthquakes not directly triggered by another earthquake, in active seismic regions is indicative of the stressing rate of fault systems.…
Seismic Evidence for Partial Melt Below Tectonic Plates
The seismic low-velocity zone (LVZ) of the upper mantle is generally associated with a low-viscosity asthenosphere that has a key role in decoupling tectonic plates from the mantl…
Hillslopes in Headwaters of Qinghai-Tibetan Plateau as Hotspots for Subsurface Dissolved Organic Carbon Processing duri…
Climate warming has accelerated thawing of northern permafrost, resulting in changes to the supply of dissolved organic carbon (DOC) to inland waters with uncertain fate. Extensiv…
Resolving the Force Term of the Electron Vlasov Equation with MMS
Widely employed to model collisionless plasma phenomena occurring naturally in Earth’s magnetic environment, throughout the heliosphere, and in laboratory fusion devices, the Vlas…
Impacts of Vegetation-generated Turbulence on Hyporheic Exchange
Hyporheic exchange, or the exchange of water and solutes between surface and subsurface water at the sediment-water interface, regulates water quality and biogeochemical cycles in…
A preliminary study on low-frequency earthquakes at Mt. Fuji, Japan, using the matched filter method
We give a preliminary report on results of detecting low-frequency earthquakes (LFs) occurring at Mt. Fuji, Japan, using the matched filter method (MF method: e.g., Peng & Zhao, 2…
The Impacts of Global Warming on Climate Zone Changes over Asia based on CMIP6 Projections
It is challenging to estimate how the regional climate will be shifted under future global warming. To reduce the potential risk of regional climate shift under future climates, e…
Determining spatio-temporal characteristics of Coseismic Travelling Ionospheric Disturbances (CTID) in near real-time
Earthquakes are known to generate ionospheric disturbances that are commonly referred to as co-seismic travelling ionospheric disturbances (CTID). In this work, for the first time…
A process-conditioned and spatially consistent method for reducing systematic biases in modeled streamflow
Water resources planning often uses streamflow predictions made by hydrologic models. These simulated predictions have systematic errors which limit their usefulness as input to w…
The multi-scale control of crustal structures on the exhumation of the British-Irish Isles, revealed by 40 years of AFT…
A compilation of legacy and new low-temperature thermochronological data from the British-Irish Isles and their surrounding offshore shelves yielded c. 700 AFT ages and c. 180 AHe…
Sensitivity of a Coarse-Resolution Global Ocean Model to Spatially Variable Neutral Diffusion
Motivated by recent advances in mapping mesoscale eddy tracer mixing in the ocean we evaluate the sensitivity of a coarse-resolution global ocean model to a spatially variable neu…
Revealing a High Water Abundance in the Upper Mesosphere of Mars with ACS onboard TGO
We present the first water vapor profiles encompassing the upper mesosphere of Mars, 100–120 km, far exceeding the maximum altitudes where remote sensing has been able to observe …
The Spontaneous Nature of Lightning Initiation Revealed
Here, we present new radio interferometer beamforming observations of lightning initiation using data from the Low Frequency Array (LOFAR). We show that the first lightning source…
Analyzing climate justice implications of the Paris Agreement by combining future global climate and sea level modeling…
The science linking anthropogenic greenhouse gas emissions with our changing climate, and the resulting impacts, has been well established for decades. During that time one of the…
Effect of Portable Ground Control Points on the Accuracy of UAV-Based Remote Sensing Data for Plant Health Prediction
This presentation talks about the effect of portable ground control points (GCPs) on the accuracy of unmanned aerial vehicle (UAV)-based remote sensing data in predicting plant he…
Interaction between disturbances and their effects on the recovery of a heterogeneous Mediterranean landscape in South …
Fires and droughts are important drivers of disturbance in Mediterranean forests. Despite this, there is a gap of knowledge of the effect of climate change and particularly the in…
Tropical Sea Surface Temperatures following the Middle Miocene Climate Transition from Laser-Ablation ICP-MS analysis o…
The mid-to-late Miocene is proposed as a key interval in the transition of the Earth’s climate state towards that of the modern-day. However, it remains a poorly understood interv…
DISTRICT LEVEL WHEAT YIELD PREDICTION FROM COARSE RESOLUTION SATELLITE DATA USING MACHINE LEARNING TECHNIQUES
Regional crop production estimates are important in both public and private sectors to ensure the adequacy of a food supply and aid policymakers and farmers in managing harvest, s…
Climate signatures on lake and wetland size distributions in arctic deltas
Understanding how thermokarst lakes on arctic river deltas will respond to rapid warming is critical for projecting how carbon storage and fluxes will change in those vulnerable e…
3-D resistivity imaging of the supercritical geothermal system in Sengan geothermal region, NE Japan
A wideband magnetotelluric survey was performed in the Sengan geothermal region of northeastern Japan. A conductor with resistivity of < 30 Ωm was found at a depth of -1.8 km in t…
Effects of Spatially Variable Drag Coefficient of Submerged Aquatic Vegetation on Surface Wave Dissipation
Submerged aquatic vegetation in estuaries and coastal areas can alter the hydrodynamics of coastal waves by attenuating the energy of waves generated by storm surges and cyclones.…
Parameter estimation for interseismic surface deformation using data assimilation
Geodetic data provide an opportunity to improve our understanding of the processes and parameters controlling the dynamics of deformation during the earthquake cycle at subduction…
FLEKS: A Flexible Particle-in-Cell code for Multi-Scale Plasma Simulations
The magnetohydrodynamics with embedded particle-in-cell (MHD-EPIC) model has been successfully applied to global magnetospheric simulations in recent years. However, the PIC regio…
Algorithmic detection of elemental biosignatures
Machine learning (ML) models that classify a sample as non-indicative or indicative of life can play an important role in planning life-detection missions. They are based on clear…
On the Apparent Duration of Low-Frequency Earthquakes
The broadband stacks (templates) of velocity seismograms of nearly co-located low-frequency earthquakes (LFEs) detected using a 1-8 Hz passband beneath southern Vancouver Island t…
Meta‑analysis cum machine learning approaches address the structure and biogeochemical potential of marine copepod asso…
Copepods are the dominant members of the zooplankton community and the most abundant form of life. It is imperative to obtain insights into the copepod-associated bacteriobiomes (…
The ebb of rivers -- the paleo-river elevation transition due to the decline of greenhouse effect on early Mars
Long term climate change on early Mars is characterized by a shift in the spatial distribution of rivers and lakes. Geological datasets suggest earlier paleo-rivers prefer higher …
Mapping 30m Boreal Forest Heights Using Landsat and Sentinel Data Calibrated by ICESat-2
Boreal forest heights are closely associated with the global carbon and energy budget. Existing investigations of boreal forests were mainly carried out at plot scales, which cann…
The 2017 Kos Sequence: Aftershocks Relocation and Coseismic Rupture Process Constrained from Joint Inversion of Seismol…
On 20 July 2017, an M w 6.6 earthquake occurred offshore Kos Island, the largest to occur in the affected area in the instrumental era, and in the past 60 years in the southeaster…
Can forecasts of the start of the spring season improve allergy and asthma symptom management?
Allergic respiratory disease affects millions of Americans, resulting in billions in medical expenses and lost productivity annually. Information regarding when pollen concentrati…
Discharge-modulated soil organic carbon export from temperate mountainous headwater streams
Erosion and riverine transport of organic carbon is an important component of the global carbon cycle, but the significance of this process for Earth’s surface carbon budgets depe…
Highly active ice-nucleating particles at the summer North Pole
The amount of ice versus supercooled water in clouds defines their radiative properties and role in climate feedbacks. Hence, knowledge of the concentration of ice-nucleating part…
DELTA: An Open-Source Framework to Simplify Machine Learning with Satellite Imagery
DELTA (Deep Earth Learning, Tools, and Analysis) is an open-source framework developed at NASA to simplify running and training machine learning (ML) models on satellite imagery. …
Linking Subsurface Complexity and Ecohydrologic Processes in Semi-arid Forests
Rock moisture can be an important contributor to forest transpiration and growth. Limited work has been done studying the effects of rock moisture (subsurface water stored in frac…
Groundwater flow through continuous permafrost along geological boundary revealed by electrical resistivity tomography
In continuous permafrost regions, pathways for transport of sub-permafrost groundwater to the surface sometimes perforate the frozen ground and result in the formation of a pingo.…
Toward efficient calibration of higher-resolution Earth System Models
Projections of future climate change to support decision-making require Earth system models (ESMs) running at high spatial resolution, but this is computationally prohibitive. A m…
The relation between the surface composition anomaly and the distribution of the exosphere of Mercury
In celestial bodies with collisionless atmospheres, such as Mercury, the spatial distribution of the exosphere is expected to reflect the surface composition. In this study, we di…
Thermal Conductivity of the Martian Soil at the InSight Landing site from HP$^{3}$ Active Heating Experiments
The heat flow and physical properties package (HP$^3$) of the InSight Mars mission is an instrument package designed to determine the martian planetary heat flow. To this end, the…
Evaluation of extreme precipitation in the Yangtze River Delta Region of China using a 1.5 km mesh convection‑permittin…
Realistic representation of detailed rainfall characteristics on local scale by current state-of-the-art climate models remains a key challenge, especially on sub-daily timescales…
The Effect of Grain Size on Porewater Radiolysis
The radiolysis of porewaters by uranium, thorium, and potassium in mineral grains is a recognised source of molecular hydrogen in rock- and sediment-hosted fluids. This radiolytic…
Anomalous responses of the F 2 layer over the Brazilian equatorial sector during a counter electrojet event: a case stu…
Key Points: • Gravity waves impacts in the anomalous responses of the F layer over Brazil during a counter electrojet event; • Some signatures in ionograms suggest the gravity wav…
The total solar irradiance as measured from space since 1978
Sun is the key driver of the Earth’s climate system, it is essential to understand the interaction between the Sun and the Earth. In this paper, the past space based Total Solar I…
Extraction of PROSAIL-simulated Spectra from Multi-angular UAV Observations: Application for Leaf Angle Estimation
Crop leaf angle is a crucial feature of plant architecture which influences photosynthetic efficiency and yield. Therefore high-throughput mapping of leaf angle is of extreme inte…
Potential of Multi-mission Satellite Altimetry Observations and Hydrodynamic Model to Establish Virtual Gauging Network…
Researchers dealing with flood hazard and risk assessment typically refer to available in-situ gauging stations for the calibration and validation of hydrological and hydrodynamic…
Regional and Seasonal Trends in Tropical Ozone from SHADOZ Profiles: Reference for Models and Satellite Products
Understanding lowermost stratosphere (LMS) ozone variability is an important topic in the trends and climate assessment communities because of feedbacks among changing temperature…
Impacts of Sea Ice Mushy Thermodynamics in the Antarctic on the Coupled Earth System
We analyze two preindustrial experiments from the Community Earth System Model version 2 (CESM2) to characterize the impact of sea ice physics on regional differences in coastal s…
Census-block-level Property Risk Assessment for Wildfire in Louisiana, U.S.A
Wildfire is an important but understudied natural hazard. Research on wildfire, as with other natural hazards, is all too often conducted at a spatial scale that is too broad to i…
Not all icequakes are created equal: basal icequakes suggest diverse bed deformation mechanisms at Rutford Ice Stream, …
Microseismicity, induced by the sliding of a glacier over its bed, can be used to characterize frictional properties of the ice-bed interface, which are a key parameter controllin…
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