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Showing 4301 to 4350 of 20289 works
New insights into diel to interannual variation in carbon dioxide emissions from lakes and reservoirs
Accounting for temporal changes in carbon dioxide (CO 2 ) emissions from freshwaters remains a challenge for global and regional carbon budgets. Here, we synthesize 171 site-month…
Satellite observations reveal thirteen years of reservoir filling strategies, operating rules, and hydrological alterat…
The hydropower fleet built in the Upper Mekong River, or Lancang, currently consists of eleven mainstream dams that can control about 55% of the annual flow to Northern Thailand a…
Roughness of ice shelves is correlated with basal melt rates
Ice shelf collapse could trigger widespread retreat of marine-based portions of the Antarctic ice sheet. However, little is known about the processes that control the stability of…
New viscous and dissolution fingering instabilities in porous media with dead-end pores in miscible displacements
Improving the understanding of mechanisms involved in low miscible displacement efficiency is significant for a wide spectrum of applications in subsurface, from environment such …
IODP Expedition 377: Arctic Ocean Paleoceanography (ArcOP) - Toward a Continuous Cenozoic Record from a Greenhouse to a…
Investigations of both short-term natural climate variability, and long-term, large-scale changes in climate state are advanced by scientific ocean drilling at globally-distribute…
Impact of inter-utility agreements on cooperative regional water infrastructure investment and management pathways
Urban water utilities, facing rising demands and limited supply expansion options, increasingly partner with neighboring utilities to develop and operate shared infrastructure. In…
Pair Selection Optimization for InSAR Time Series Processing
The ever-increasing amount of SAR data motivates the development of automatic processing chains to fully exploit the opportunities offered by these large databases. The InSAR Mass…
The Onset Timing of Deep Mantle Upwelling Beneath the Northwestern South China Sea Margin
Massive eruptions of OIB-type volcanism in the Leizhou-Hainan area, Indochina and South China Sea oceanic basin around the northwestern South China Sea margin indicate occurrence …
NASA Student Airborne Research Program (SARP) Whole Air Sampling across the United States during the COVID-19 Pandemic
The 2020 COVID-19 pandemic provided a unique opportunity to sample atmospheric gases during a period of very low industrial/human activity. Over 1000 Whole Air Samples were collec…
Structural Nexus and Divide: the Western Tauern Window, Eastern Alps
The western Tauern Window of the Eastern Alps constitutes a mature transpressive wrench zone generated by Oligocene-Miocene convergence between the Dolomites Indenter and the Euro…
Freshwater input and vertical mixing in the Canada Basin’s seasonal halocline: 1975 vs 2006-2012
The seasonal halocline impacts the exchange of heat, energy, and nutrients between the surface and the deeper ocean, and it is changing in response to Arctic sea ice melt over the…
A coarse-grained decomposition of surface geostrophic kinetic energy in the global ocean
We apply a coarse-grained decomposition of the ocean’s surface geostrophic flow derived from satellite and numerical model products. In the extra-tropics we find that roughly 60\%…
Hydrologic Model Parameter Estimation in Ungauged Basins using Simulated SWOT Discharge Observations
In situ gauge networks are often used in hydrologic model calibration, but these networks are limited or nonexistent in many regions. The upcoming Surface Water Ocean Topography (…
Multi-Instrument Characterisation of Magnetospheric Cold Plasma Dynamics in the 22 June 2015 Geomagnetic Storm
We present a comparison of magnetospheric plasma mass/electron density observations during an 11-day interval which includes the geomagnetic storm of 22 June 2015. For this study …
Hydrogeophysical Characterization in a Volcanic Context From Local to Regional Scales Combining Airborne Electromagneti…
In volcanic islands, a crucial step in managing watershed water resources is the characterization of groundwater aquifers from local to regional scales. Airborne geophysical data …
Occurrence of structural aluminum (Al) in marine diatom biological silica: Visible evidence from microscopic analysis
The global marine biogeochemical cycle of aluminum (Al) is believed to be driven by marine diatoms, due to the uptake of dissolved Al (DAl) by living diatoms from surface seawater…
Prevalence of updip rupture propagation in interplate earthquakes along the Japan Trench
The development of seafloor seismic observations facilitates reliable estimation of the rupture directivities of offshore earthquakes. We used seismic waveforms obtained by a new …
Reaction-diffusion waves in hydro-mechanically coupled porous solids as a precursor to instabilities
Here, we extend the Fisher-Kolmogorov-Petrovsky-Piskunov equation to capture the interplay of multiscale and multiphysics coupled processes. We use a minimum of two coupled reacti…
Choice of Pedotransfer Functions matters when simulating soil water balance fluxes
Modelling of the land surface water-, energy-, and carbon balance provides insight into the behaviour of the Earth System, under current and future conditions. Currently, there ex…
Has the Gulf Stream Slowed or Shifted in the Altimetry Era?
The Gulf Stream is expected to slow and shift poleward over the next century due to climate change. We investigate whether such changes are already observable in the altimetric re…
Sea surface height anomalies of the Arctic Ocean from ICESat-2: a first examination and comparisons with CryoSat-2
Accurately resolving spatio-temporal variations in sea surface height across the polar oceans is key to improving our understanding of ocean circulation variability and change. He…
Surface slip variations and off-fault deformation patterns in complex cross-fault systems revealed from 3D high-resolut…
The Ridgecrest sequence (Mw6.4 and Mw7.1, July 2019, California) is a cross-fault earthquake that has been observed using a wide range of geophysical and geological methods. The s…
Lower-stage plane bed topography is an outcome of rarefied, intermittent sediment transport
Sedimentary bed configurations that are stable under weak fluid-driven transport conditions can be divided into two groups: (1) meso-scale features that influence flow and sedimen…
Indirect measurements of the composition of ultrafine particles in the Arctic late-winter
We present indirect measurements of size-resolved ultrafine particle composition conducted during the Ocean–Atmosphere–Sea Ice–Snowpack (OASIS) Campaign in Utqiagvik, Alaska, duri…
Two-Stage Mafic-Felsic Magma Interactions and Related Magma Chamber Processes in the Arc Setting: An Example from the E…
A systematic dataset of petrography, mineralogy, geochronology, and geochemistry is reported for the enclave-bearing calc-alkaline I-type granitoids from the Chinese Altai, Centra…
Application of Grain-Size End-Member Modelling in Bed Sediments of the Brahmaputra River
Superimposed signatures of grain size effect, lithology and chemical processes on fluvial sediments need to be resolved to answer the profound research questions related to sedime…
The 2019-2020 Khalili (Iran) earthquake sequence - anthropogenic seismicity in the Zagros Simply Folded Belt?
We investigate the origin of a long-lived earthquake cluster in the Fars arc of the Zagros Simply Folded Belt that is co-located with the major Shanul natural gas field near the s…
Revised interpretation of a specific historical meteorite impact in the Adelaide Hills - Kurianda, A potential meteorit…
Crawford and Flaxman impact data that have been attributed to the Eocene, and were published at the turn of the millenium, have been reinterpreted in the light of a visible crater…
Thunder CATS, Ho! Exploring the scientific utility of combined spaceborne lidar and lightning observations of thunderst…
We will report on the first systematic comparison between global optical lightning measurements and backscatter lidar observations of cloud properties. The results suggest that li…
Probabilistic Characterization of Sweep and Ejection Events in Turbulent Flows: Insights from Direct Numerical Simulati…
Turbulent boundary layers are populated by a hierarchy of recurrent structures normally referred to as “coherent structures.” Among others, ejection and sweep events are critical …
Prospect of increased disruption to the QBO in a changing climate
The quasi-biennial oscillation (QBO) of tropical stratospheric winds was disrupted during the 2019/20 Northern Hemisphere winter. We show that this latest disruption to the regula…
Potential of regional ionosphere prediction using a long short-term memory (LSTM) deep-learning algorithm specialized f…
In our previous study (Moon et al., 2020), we developed a Long Short Term Memory (LSTM) deep-learning model for geomagnetic quiet days to perform effective long-term predictions f…
Crustal structure of the UAE-Oman mountain range and Arabian rifted passive margin: new constraints from active and pas…
The Semail ophiolite, a thick thrust sheet of Late Cretaceous oceanic crust and upper mantle, was obducted onto the previously rifted Arabian continental margin in the Late Cretac…
On the radiation environment during consecutive balloon flights over New Mexico and Antarctica
Remarkably, we know more about the radiation environment onboard the International Space Station than we do about radiation values at altitudes between 30-40 km in the middle stra…
The 2020 Mw6.0 Jiashi earthquake: Coinvolvement of thin-skinned thrusting and basement-shortening in shaping the Keping…
The Keping-tage fold-thrust belt in southwest Tian Shan is seismically active, yet most well-recorded earthquakes occurred south of the mountain front, hindering our understanding…
Archeomagnetic intensity variations during the era of geomagnetic spikes in the Near East
Observational records of rapidly varying magnetic fields strongly constrain our understanding of core flow dynamics and Earth’s dynamo. Archeomagnetic analyses of densely sampled …
Catchment processes can amplify the effect of increasing rainfall variability
By filtering the incoming climate signal when producing streamflow, river basins can attenuate – or amplify – projected increases in rainfall variability. A common perception is t…
Variability of the Apparent Respiratory Quotient of a forest Soils and Tree Stems
The CO 2 /O 2 fluxes ratio (ARQ) measured in soils and plants contains valuable information about the respiratory-substrate stoichiometry and biotic and abiotic non-respiratory pr…
The Spatial Relationship Between Contemporaneous Tremor Detections in Relatively Low- and High-Frequency Bands
Although tremor is believed to consist of myriad Low-frequency Earthquakes (LFEs), it also contains longer-period signals of unknown origin. We investigate the source of some of t…
New Measurement of the Vertical Atmospheric Density Profile from Occultations of the Crab Nebula with X-Ray Astronomy S…
We present new measurements of the vertical density profile of the Earth’s atmosphere at altitudes between 70 and 200\,km, based on Earth occultations of the Crab Nebula observed …
Influence of Anthropogenic Nutrient Inputs on Rates of Coastal Ocean Nitrogen and Carbon Cycling in the Southern Califo…
Coastal nitrogen (N) enrichment is a global environmental problem that can influence acidification, deoxygenation, and subsequent habitat loss in ways that can be synergistic with…
A Novel Rapid Investigation Method for Ecological Agriculture Patterns Based on Web Text
The investigation of Ecological Agriculture (EA) patterns can reveal the differences, aggregation, and diversity of agriculture development, providing specific paths in agricultur…
Performance Evaluation of Remote Sensing-based High Frequent Streamflow Estimation Models at the Bramhani River Basin O…
For catchment-scale streamflow estimation, recently, the preference is shifting towards the use of innovative remote sensing (RS)-based approaches at the remote gauging stations. …
Seasonal responses of δ13C and δ18O of atmospheric CO2 over sub-urban region of India
Seasonal and diurnal variability of atmospheric CO2 and its driving factors are studied using its continuous monitoring of concentration and isotopic ratios (δ13C-CO2 and δ18O-CO2…
Understanding the Variation of Seismicity in the Eastern Himalayas: Using Earthquake Frequency-Magnitude Distribution a…
The Eastern Himalayan region, along with its neighboring area is known to be the part of the ‘Alpine-Himalayan global seismic belt’, a seismically active area of the world. In the…
Computational Fluid Dynamics Model to Simulate Methane Dispersion at Oktoberfest
In this paper, a computational fluid dynamics (CFD) model is developed to simulate the methane (CH4) dispersion of exhaust gases from the Munich Oktoberfest, the world’s largest f…
Dynamic imaging of glacier structures at high-resolution using source localization: a dense seismic array experiment.
Dense seismic array monitoring on glaciers combined with advanced array processing may help retrieve and locate a variety of seismic sources with unprecedented resolution and spat…
Reconstruction of temperature, accumulation rate, and layer thinning from an ice core at South Pole using a statistical…
Data from the South Pole ice core (SPC14) are used to constrain climate conditions and ice-flow-induced layer thinning for the last 54,000 years. Empirical constraints are obtaine…
ArchKalMag14k: A Kalman-filter based global geomagnetic model for the Holocene
We propose a global geomagnetic field model for the last fourteen thousand years, based on thermoremanent records. We call the model ArchKalMag14k. ArchKalMag14k is constructed by…
Crystallographic preferred orientation (CPO) development governs the strain weakening in minerals with strong viscous a…
Strain weakening plays an important role in the continent-scale flow of rocks and minerals, including ice. In laboratory experiments, strain weakening coincides with microstructur…
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