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Showing 3401 to 3450 of 22070 works
A comprehensive process-based model for Arctic coastal erosion
In recent years, various models have been developed to describe Arctic coastal erosion. Many models are process-based, simulating multiple physical processes and combining them in…
Electron Accepting Capacities of a wide variety of peat materials from around the Globe similarly explain CO2 and CH4 p…
In organic soils the availability of electron acceptors determines the ratio of CO 2 to CH 4 formation under anoxic conditions. While typically only inorganic electron acceptors a…
Estimation of Sea Spray Aerosol Surface Area over the Southern Ocean Using Scattering Measurements
This study focuses on methods to estimate dry marine aerosol surface area (SA) from bulk optical measurements. Aerosol SA is used in many models’ ice nucleating particle (INP) par…
Late Mesozoic-Cenozoic apatite fission-track (AFT) cooling history of the Greater Khingan Mountains and its implication…
Apatite fission-track (AFT) tests of clastic samples from the Greater Khingan Mountains (GKM) in China show a center age of 260–62 Ma. Thermal modeling of observed fission-track-l…
SIGMA: Spectral Interpretation using Gaussian Mixtures and Autoencoder
Identification of unknown micro- and nano-sized mineral phases is commonly achieved by analyzing chemical maps generated from hyperspectral imaging datasets, particularly scanning…
Theories of Change: An Equity-Based Framework to Improve Engineering Efforts to Advance Environmental Justice
Civil and environmental engineering research and development are essential in the efforts to assess, design, improve, and implement infrastructure. Engineering disciplines are vit…
Spatiotemporal Attentive Gated Recurrent Unit: A Novel Method to Forecast O3
Due to the limited understanding of the physical/chemical processes and large uncertainties in emissions, ozone prediction task becomes more difficult with numerical models. Deep …
Radiatively Active Hydrometeors Frequencies from CloudSat-CALIPSO Data for Evaluating Cloud Fraction in Global Climate …
This study derives radiatively-active hydrometeors frequencies (HFs) from CloudSat-CALIPSO satellite data to evaluate cloud fraction in present-day simulations by CMIP5 models. Mo…
Statistical and clustering analysis of microseismicity from a Saskatchewan potash mine
Typical mining operations can induce microseismicity and in some cases can result in the occurrence of moderate to large events, which is an expected but not always fully understo…
Extremely High Frequency (~30 Hz) EMIC Wave Observed
We have observed ~30 Hz EMIC wave on September 8, 2017 at ~10:45 to 10:55 UT. This wave is a 2XH+ EMIC wave. This wave was generated by pitch angle anisotropy of protons with ener…
Ionospheric Plasma Structuring in Relation to Auroral Particle Precipitation
Auroral particle precipitation potentially plays a main role in ionospheric plasma structuring. The impact of auroral particle precipitation on plasma structuring is investigated …
Watermass co-ordinates isolate the historical climate change signal
Persistent warming and water cycle change due to anthropogenic climate change modifies the temperature and salinity distribution of the ocean over time. This ‘forced’ signal of te…
Sun resonant forcing of Mars, Moon, and Earth seismicity
Global seismicity on all three solar system’s bodies with in situ measurements — Earth, Moon, and Mars — is due mainly to Rieger resonance (RR) of the solar wind’s macroscopic fla…
Significant ionospheric hole and equatorial plasma bubbles after the 2022 Tonga volcano eruption
This paper investigates the local and global ionospheric responses to the 2022 Tonga volcano eruption, using ground-based Global Navigation Satellite System (GNSS) total electron …
Increasing Wind-Driven Wildfire Risk Across California's Sierra Nevada Mountains
Surface winds are an important factor in wildfire growth and the decision-making process of when utility companies shut off power to suppress fire ignitions. However, long-term tr…
Pulses of Cold Atlantic Water in the Arctic Ocean from Ocean Model Simulation
The thermohaline intrusion of the warm and saline Atlantic Water (AW) into the Arctic Ocean, referred to as “Arctic Atlantification”, has significant implications and feedback to …
Developing and Implementing a Culture of Diversity, Equity, and Inclusion at an International Research Center in an Arc…
The stated mission of the International Arctic Research Center (IARC) at the University of Alaska Fairbanks (UAF) is ”to foster Arctic research to help the nation and the world un…
Seasonal Variation Analysis of Air Pollutants in Accra-Ghana
Meteorology is a major driving force to poor urban air quality. This is due to its ability to influence the emissions, transport, formation, and deposition of air pollutants. In t…
A Deep Learning-Based Ensemble Surface Energy Balance Modeling Approach to Monitor Crop Water Use and Water Stress in d…
Most remote sensing-based surface energy balance (SEB) models are limited by data availability and physical constraints to fully capture the non-linear and temporally varying natu…
Enhanced biogeochemical cycling along the U.S. West Coast shelf
Continental margins play an essential role in global ocean biogeochemistry and the carbon cycle; however, global assessments of this role remain highly uncertain. This uncertainty…
Space-Based Radar Polarimetry, Demythologized
Ten fundamental polarimetric principles sufficient to characterize a quasi-monochromatic electro-magnetic field are presented. Although many of these may be familiar to readers, w…
Solar Wind Energy Input: The Primary Control Factor of Magnetotail Reconnection Site
In this paper, we examine the solar wind energy input (expressed by −Vx × Bs, where Vx is the x component of the solar wind velocity and Bs is the southward component of the inter…
Wave Breaking Events and their link to Rossby Wave Packets and Atmospheric Blockings during Southern Hemisphere Summer
Rossby Wave packets (RWPs) are atmospheric perturbations located at upper levels in mid-latitudes which, in certain cases, terminate in Rossby Wave Breaking (RWB) events. When suf…
Elucidating the impacts of aerosol radiative effects on surface O3 and PM2.5 for air pollution mitigation strategy in D…
Atmospheric aerosol radiative effects regulate surface air pollution (O3 and PM2.5) via both the aerosol–photolysis effect (APE) and the aerosol–radiation feedback (ARF) on meteor…
Arctic Sea Level Variation in the Context of Climate Change: Accelerated rise period and Change of Key Influencing fact…
This study finds that sea level height in Arctic marginal sea in melting season enters an accelerated rise period since the beginning of the 21st century. It is found that precipi…
Afterslip of the Mw8.3 2015 Illapel earthquake imaged through a time-dependent inversion of continuous and survey GNSS …
We use continuous and survey GNSS data to image the spatial and temporal evolution of afterslip during the two-months following the Mw8.3 Illapel earthquake. Our approach solves f…
Rare Earth Elements in Coal-combustion Fly Ash and Their Potential Recovery
Coal fly ash has long been considered a potential resource for recovery of valuable elements, such as rare earth elements (REE), which are retained and concentrated upon combustio…
The Short-time Prediction of Thermospheric Mass Density Based on Ensemble-Transfer Learning
Reliable short-time prediction of thermospheric mass density along the satellite orbit is always essential but challenging for the operation of Low-Earth orbit (LEO) satellites. I…
Snow Crash: Compaction Craters on (486958) Arrokoth and Other Small KBOs
Evidence from Arrokoth and comets strongly suggests a very low density for this and similar small Kuiper belt objects. Plausible compositions imply very high porosities, in excess…
The Entropic Braiding Index (eBI): a robust metric to account for the diversity of channel scales in multi-thread rivers
The Braiding Index (BI), defined as the average count of intercepted channels per cross-section, is a widely used metric for characterizing multi-thread river systems. However, it…
Minimal recipes for global cloudiness
Clouds are primary modulators of Earth's energy balance. It is thus important to understand the links connecting variabilities in cloudiness to variabilities in other state variab…
Comment on “Influence of data filters on the position and precision of paleomagnetic poles: what is the optimal samplin…
In a recent paper, Gerritsen et al. (2022) propose to modify the well-accepted sampling strategy in paleomagnetism by collecting more single-sample sites. They also argue that the…
Reductions in California's urban fossil fuel CO2 emissions during the COVID-19 pandemic
Fossil fuel CO2 emissions (ffCO2) constitute the majority of greenhouse gas emissions and are the main determinant of global climate change. The COVID-19 pandemic caused wide-scal…
Locating Shallow Seismic Source Changes Using Delay Time and Amplitude Ratio Information from Cross-Correlation Functio…
Volcanic tremors and earthquakes must be monitored to gain insights into volcanic activity. Localization of their sources is often challenging because of the unclear onset of seis…
The seasonal cycle of δ13C of atmospheric carbon dioxide: Influences of land and ocean carbon fluxes and drivers.
In situ measurements of the seasonal cycle of δ13C(CO2) provide complementary information on the seasonality of the global carbon cycle, but are currently not exploited in the con…
Microphysical Pathways Active within Thunderstorms and Their Sensitivity to CCN Concentration and Wind Shear
The impact of cloud condensation nuclei (CCN) concentration on microphysical processes within thunderstorms and the resulting surface precipitation is not fully understood yet. In…
Simultaneous occurrence of three non-interacting characteristically different ionospheric plasma structures over the ge…
An unusual event of three characteristically different plasma structures on a geomagnetically quiet night (Ap = 4) of 08 July 2018 has been investigated in this paper using an all…
New results from Apollo program science
Apollo lunar missions remain the most ambitious manned spaceflights in history, five decades after their conclusion. Apollo free-return mission design atmospheric reentry speeds r…
The Panola Mountain Research Watershed: 37 Years of Research at a Forested Headwater Catchment in the Piedmont of the S…
The Panola Mountain Research Watershed (PMRW) is a 41-hectare, forested research catchment within the Piedmont Province of the United States (U.S.), located about 25 km southeast …
North American glaciations and Pacific inputs in the Nd and Sr isotope Pleistocene record from the western Arctic Ocean
Enduring questions remain regarding the transition from relatively warm and stable pre- and early-Pleistocene climate to that of the high amplitude glacial-interglacial cycles lat…
Influence of Target Properties on Wall Slumping in Lunar Impact Craters within the Simple-to-Complex Transition
The 15-20 km crater diameter range on the Moon spans simple to transitional to complex crater morphologies. Simple craters in this range are only in the highlands. Transitional cr…
On the rise and fall of Earth's strong clear-sky hemispheric albedo asymmetry
A striking feature of the Earth system is that the Northern and Southern Hemispheres reflect identical amounts of sunlight. This hemispheric albedo symmetry comprises two asymmetr…
Assessing Water Quality from Roof Rainwater Harvesting Systems Aimed for Potable Use: A Case Study in the Eastern Cape …
Globally, water scarcity is on the rise. South Africa has a semi-arid to arid climate, and lack of water resources is resulting in physical water scarcity. Eastern Cape is the sec…
An estimate of excess mortality resulting from air pollution caused by wildfires in the eastern and central Mediterrane…
Wildfires result in human fatalities not only due to the direct exposure to flames, but also indirectly through smoke inhalation. The Mediterranean basin with its hot and dry summ…
Mapping the Brightness of Ganymede's Ultraviolet Aurora using Hubble Space Telescope Observations
• Brightness map of Ganymede’s ultraviolet auroral emission has been constructed based on a large set of HST observations • Auroral ovals are structured in upstream and downstream…
Occurrences of Surfactants in Lake Sediments
With population surge, industrialization and urbanization; use of surfactants has increased manifold. After their use in households and industries, surfactants either end up in se…
The 2021 Mw6.7 Lake Hovsgol, Mongolia earthquake: Irregular normal faulting with slip partitioning controlled by an adj…
We reveal a slip-partitioning rupture on the North Hovsgol Fault during the 2021 Mw6.7 Lake Hovsgol, Mongolia earthquake. Left-lateral motions on the Mondy Fault north of the epic…
Six Decades of Thermal Change in a Pristine Lake Situated North of the Arctic Circle
The majority of lake temperature studies have investigated climate-induced changes occurring at the lake surface, primarily by analyzing detailed satellite images of surface water…
The Importance of Lake Emergent Aquatic Vegetation for Estimating Arctic-Boreal Methane Emissions
Areas of lakes that support emergent aquatic vegetation emit disproportionately more methane than open water but are under-represented in upscaled estimates of lake greenhouse gas…
A Force-Restore Model of Snow Surface Temperature
A new dynamic model of snow surface temperature known as force-restore model (FRM) is formulated for one-dimensional heat transfer taking into account of the absorption of solar r…
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