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Showing 12151 to 12200 of 22070 works
3D convection, phase change, and solute transport in mushy sea ice
Sea ice is a porous mushy layer composed of ice crystals and interstitial brine. The dense brine tends to sink through the ice, driving convection. Downwelling at the edge of conv…
Sedimentary ancient DNA from Kronotsky Peninsula: how sea ice, salinity and insolation dynamics have shaped diatom comp…
We traced diatom composition and diversity through time using diatom derived sedimentary ancient DNA ( sed aDNA) from eastern continental slope sediments off Kamchatka (North Paci…
Comparing methods of identifying non-stationary, non-linear processes from stream temperature time series data
The determination of flow state remains an important challenge in non-perennial river catchments. Previous studies interpreted stream channel temperature time series data using th…
Cancellation of the precessional cycle in δ18O records during the Early Pleistocene
Deep-sea δ18O records show a pronounced difference in Milankovitch periodicity between the Early and Late Pleistocene. δ18O is interpreted as a proxy for ice sheet volume and temp…
Nearshore Monitoring with X-Band Radar: Maximising Utility in Dynamic and Complex Environments
Data quantifying the nature and range of bathymetric changes in the near-shore are required for coastal management and engineering works. However, due to high costs and complex lo…
Decoupling between particulate carbon, nitrogen and biogenic silica export mediated by cyclonic eddies in the North Pac…
We identified 38 cyclonic eddies (CEs) using satellite altimetry that traversed Station ALOHA in the North Pacific Subtropical Gyre from 1993 to 2018. We separated CE-induced part…
Autonomous Identification of the Morphology of Chorus Elements in The Van Allen Radiation Belts
We will present signal processing techniques based on shape analysis of the time-frequency signatures of chorus elements in the Van Allen Radiation Belts. Specifically, we will em…
Mapping altimetry in the forthcoming SWOT era by back-and-forth nudging a one-layer quasi-geostrophic model
During the past 25 years, altimetric observations of the ocean surface from space have been mapped to provide two dimensional sea surface height (SSH) fields which are crucial for…
Magnetic fatigue: Effect of seismic-related loading on magnetic and structural behavior of magnetite
Powders of multidomain magnetite were subjected to fatigue, cyclic loading at ambient conditions between 30 and 500°C using a dynamical mechanical analysis system. The uniaxial st…
Characterization of Canopy Anisotropies Over a Forested Area using a Multispectral Imager Integrated into an Unmanned A…
Challenges in remote sensing, including remote sensing of vegetation, include the spectral characterization of objects over space and time. One key aspect for this characterizatio…
Why are ELEvoHI CME arrival predictions different if based on STEREO-A or STEREO-B heliospheric imager observations?
Accurate forecasting of the arrival time and arrival speed of coronal mass ejections (CMEs) is a unsolved problem in space weather research. In this study, a comparison of the pre…
How wind shear affects trade-wind cumulus convection
Motivated by an observed relationship between marine low cloud cover and surface wind speed, this study investigates how vertical wind shear affects trade-wind cumulus convection,…
Integrating rock pillars into a fragile geologic features analysis of fault activity in the Negev, Israel
Fragile geologic features (FGF) are used as negative indicators of strong ground motion. By evaluating the stability of FGFs and determining their age, it is possible to constrain…
Metamorphic data from global subduction zones do not call for excessive overpressures
Yamato and Brun (Nature Geoscience 10, 46-50, 2017) claimed that metamorphic data from global (ultra)high-pressure ((U)HP) rocks exhibit an unusual linear relation, between peak p…
Addressing cross-scale conservation efforts within overlapping areas in the Orinoco River watershed
Overlapping areas between Protected Areas and Indigenous peoples’ territories are important spaces for articulating cross-scale governing institutions and augmenting socioecologic…
Can magnetic fabrics distinguish between aseismic and seismic slip along faults?
A long-standing problem in paleoseismic studies is to distinguish between aseismic and seismic slips along faults. We address this problem by characterizing the magnetic fabrics o…
Arctic sea ice variability during the Instrumental Era
Arctic sea-ice extent (SIE) has declined drastically in recent decades, yet its evolution prior to the satellite era is highly uncertain. Studies using SIE observations find littl…
Development and Prospects of Continental-Scale Resistivity Surveying for Orogenic Processes and Resource Controls
At regional scales, electrical resistivity illuminates Earth processes involving fluid evolution and transport, temperature contrasts, and fault characteristics and behavior. It a…
Ensemble skill gains obtained from the multi-physics versus multi-model approaches for continental-scale hydrological s…
Multi-physics ensemble simulations have emerged as a promising approach to ensemble hydrological simulations due to the advantages in process understanding and model development. …
Paleovegetation dynamics in a montane vegetation mosaic in the Western Ghats, India: evidence for alternative stable st…
Ecologists have proposed that montane grassland-shola (stunted evergreen forest) mosaics in the Western Ghats may represent alternative stable vegetation states. But paleoecology …
Comparison of original orbits of Oort Cloud new comets given in various catalogues
Nearly isotropic comets with very long orbital period are supposed to come from the Oort Cloud. Recent observational and theoretical studies have greatly revealed the dynamical na…
Scale sensitivity of the Gill circulation, Part II: off-equatorial case
We investigate the steady dynamical response of the atmosphere on the equatorial β-plane to a steady, localized, mid-tropospheric heating source. Following Part I which investigat…
PTFO 8-8695: Two Stars, Two Signals, No Planet
PTFO 8-8695 (CVSO 30) is a star in the 7-10 million year old Orion-OB1a cluster that shows brightness dips that resemble planetary transits. Although strong evidence against the p…
Non-dilatant brittle deformation and strength weakening of olivine gabbro due to hydration
To investigate the influence of hydration on brittle deformation of oceanic crustal rocks, we conducted triaxial deformation experiments on gabbroic rocks with various degrees of …
Parametric Study of Prompt Methane Release Impacts II: Effect of a Dynamic Ocean on Model Results
A unique event in 2020 was the nearly complete lack of ice cover on the shallow Kara Sea and Laptev Sea continental shelves at the end of October – a necessary antecedent to hypot…
Coseismic and postseismic slip as a likely trigger of a 1 slow slip event (M 5.5) on the Longitudinal Valley
Using borehole strainmeters, we detected a 13-day long slow slip event on the Longitudinal Valley Fault, Taiwan. It is located between 8 to 15 km depth and has an equivalent momen…
Climate-Water Impacts on Interconnection-Scale Electricity System Planning
A growing literature emphasizes the importance of integrating climate change impacts into electricity system planning. Rising average temperatures can increase and shift electrici…
Rootless Cones and Tree-Root Lava: Recognizing Lava-Water Interactions Remotely
Lava-water interactions (LWIs) are rarely considered in lava flow hazard assessments or emergency planning scenarios, though they can generate a range of secondary hazards, incl…
Variations of stress parameters in the Southern California plate boundary around the South Central Transverse Ranges
We examine stress parameters in Southern California with a focus on the region near the South Central Transverse Ranges (SCTR), using a refined stress inversion methodology to 198…
Strong intensification of hourly rainfall extremes by urbanization
Although observations and modelling studies show that heavy rainfall is increasing in many regions, how changes will manifest themselves on sub-daily timescales remains highly unc…
The Episodically Buckling and Collapsing Continental Crust in Subduction Zones
We discover a remarkable correlation between the inter-tremor time interval and the slenderness ratio of the overriding plate in subduction zones all over the world. In order to u…
Modeling and Forecasting Human Modified Streamflow Using a Recurrent Neural Network
Providing accurate forecasts of human modified streamflow is critical for applications ranging from natural resource management to hydropower generation. In this study we evaluate…
Spatial and seasonal variation of water quality in Batan Bay, Philippines
Batan Bay and Tinago Lake are shallow embayments connected to each other, located on the north of Panay Island, central Philippines (11.53° – 11.67°N, 122.38° – 122.52°E). Althoug…
The Southern Ocean Radiative Bias, Cloud Compensating Errors and Equilibrium Climate Sensitivity in CMIP6 Models
Analysis of Coupled Model Intercomparison Project Phase 6 (CMIP6) models has focused on their higher equilibrium climate sensitivity (ECS) relative to CMIP5 simulations, with high…
ICESat-2 early mission synopsis and observatory performance
The Advanced Topographic Laser Altimetry System (ATLAS) onboard the NASA Ice, Cloud and land Elevation Satellite-2 (ICESat-2) is the newest and most recent Earth observing satelli…
Mean flow direction modulates non-Fickian transport in a heterogeneous alluvial aquifer-aquitard system
Regional-scale groundwater quality degradation from nonpoint source pollution threatens the long-term sustainability of major alluvial aquifer-aquitard systems worldwide. Upscaled…
Project Redefining Recognition: Challenging traditional research assessment
In our current system, research assessment and reward are weighted heavily towards scientific inputs and outputs, and research impact is measured in funding dollars awarded and re…
Polar amplification as an inherent response of a circulating atmosphere: results from the TRACMIP aquaplanets
In the TRACMIP ensemble of aquaplanet climate model experiments, CO2-induced warming is amplified in the poles in 10 out of 12 models, despite the lack of sea ice. We attribute ca…
A miniaturised balloon-borne cloud water sampler and its deployment in the high Arctic
Poor understanding of aerosol-cloud interactions and cloud feedback processes in the Arctic climate system limit our ability to constrain future climate in the region and one impo…
Formulation of a new footprint model for measuring fluxes of biological resuspension
Biological resuspension of sediments from the seafloor occurs when fish and other marine creatures search for food and shelter. In high-energy habitats, waves and currents dominat…
Numerical simulations of the geospace response to the arrival of a perfect interplanetary coronal mass ejection
Understanding extreme space weather events in terms of the geospace response is a critical step towards protecting vulnerable technological infrastructure. This is particularly re…
Evaluation of inter-annual to decadal changes in tropical Andean stream chemistry below debris-covered glaciers
The rapid retreat of tropical glaciers in the Cordillera Blanca, Peru, results in significant changes to the quality and quantity of the streamflow below. Debris-covered glaciers …
Snowmelt–Albedo Feedback: How Does It Impact Antarctic Surface Melt Rates?
The future mass balance of the Antarctic ice sheet depends for an important part on the stability of the floating ice shelves that surround it, as these buttress the flow of groun…
Crystal fractionation by crystal-driven convection
Fractional crystallization is an essential process proposed to explain worldwide compositional abundances of igneous rocks. It requires crystals to precipitate from the melt and s…
A physics-based universal indicator for vertical decoupling and mixing across canopies architectures and dynamic stabil…
Air flows may be decoupled from the underlying surface either due to strong stratification of air or due to canopy drag suppressing cross-canopy mixing. During decoupling, turbule…
Effects of urbanization on Water Yield, Ecosystem Productivity, and Micro-Climate: Case studies in the United States an…
Land use and land cover changes (LULCC) associated with urbanization affect watershed functions and services through fundamental alteration of biogeochemical cycles. Quantifying t…
Thermal Properties of Glassy and Molten Planetary Candidate Lavas
Heat transport plays a crucial role in igneous processes, and the thermal evolution of the interiors of terrestrial bodies. Thermal conductivity is a product of density (ρ), therm…
A Proxy for Quantitative Sea Ice Reconstruction under Complicated Hydrodynamic Conditions: A Case Study in Prydz Bay, A…
IPSO 25 and a combination of phytoplankton biomarkers and IPSO 25 (termed PIPSO 25 ) have been proposed as qualitative sea ice proxies in Antarctica. Exploring the effects of hydr…
Preseismic fault creep and elastic wave amplitude precursors scale with lab earthquake magnitude for the continuum of t…
Tectonic faults fail in a continuum of modes from slow earthquakes to elastodynamic rupture. Precursory variations in elastic wavespeed and amplitude, interpreted as indicators of…
Wettability-controlled phase transition in displacement- and trapping efficiency in 3D porous media: A micro-CT study
Background: Capillary trapping of gas bubbles and oil blobs within water-saturated media plays an important role for underground gas storage and secondary oil recovery. Wettabilit…
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