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Showing 8201 to 8250 of 59105 works
A Proposed Methodology for an Integrated Sustainable Development Goal (SDG) Index for the Water-Energy-Food Nexus
Measuring progress towards achieving the 17 UN Sustainable Development Goals (SDGs) requires the monitoring of indicators developed to assess and quantify changes in the state of …
Drainage Canals in Southeast Asian Peatlands Increase Carbon Emissions
Drainage canals associated with logging and agriculture dry out organic soils in tropical peatlands, thereby threatening the viability of long-term carbon stores due to increased …
Understanding the role of exospheric density in the ring current recovery rate
Atomic Hydrogen (H) is the most abundant constituent of the terrestrial exosphere. Its charge exchange interaction with ring current ions (H+ and O+) serves to dissipate magnetosp…
No mantle convection but efficient tidal forces move plates (Corrected)
First part of the paper deals with obscure imagination of mantle convection, which contradicts to any real observations. Geological maps clearly show plates rotation round South P…
A Cenozoic mid-crustal tectonic discontinuity: the Ailao Shan fault, southeastern
A crustal section is exposed across the Ailao Shan Tectonic Belt (ALTB) that is suggested to be the accommodation zone of southeastward extrusion of the Sundaland block during the…
How Mesoscale Eddies Masquerade as Rossby Waves in Newly Merged Altimetric Products?
Limited by under-sampling spatiotemporal resolution of satellite altimeters, isolated and oval closed eddies can appear as wave-like patterns. This problem hindered the definitely…
Long-term Hydrological Variations of the Ogooue River Basin
This chapter describes the variability of rainfall and river discharges in the Ogooué River basin (ORB) in recent decades (since 1940). Due to its location crossing the Equator, t…
A toy model to investigate stability of AI-based dynamical systems
The development of atmospheric parameterizations based on neural networks is often hampered by numerical instability issues. Previous attempts to replicate these issues in a toy m…
Influence of Reconstruction of Arctic Sea Ice Thickness on the Ice-ocean Coupled Forecast in Ice Melting Season
Generally, the sea ice prediction skills can be improved by assimilating the observed sea ice data into a numerical forecast model to update the initial fields of the model. Meanw…
Finding the “Just Right” Tools for Environmental Geochemistry Research at the Tar Creek Superfund Site Ottawa County, OK
How do formal and informal land use changes have the potential to create unique, and potentially synergistic, risks to communities? Traditionally environmental geochemists privile…
Projecting the Urban Heat Island Effect Using Historical Weather Patterns and Land Cover
An Urban Heat Island is a metropolitan area with higher air and surface temperatures than surrounding areas. The Urban Heat Island Effect (UHIE) is a relative measure of the heat …
River stage modeling with a Deep Neural Network using long-term rainfall time series as input data: Application to the …
The increasing frequency of devastating floods from heavy rainfall associated with climate change has made river stage prediction more important. For steep, forest-covered mountai…
Planetary wave-driven enhanced NO descent into the top of the Arctic polar vortex during major and minor SSWs
The polar vortices play a central role in vertically coupling the Sun-Earth system by facilitating the descent of reactive odd nitrogen (NO x = NO + NO 2 ) produced in the atmosph…
Influence of Solar Irradiation on Nitrous Acid Production in Western U.S. Wildfire Smoke
Biomass burning is a primary emission source for a host of gas- and aerosol-phase compounds, which can damage environmental and human health. During the FIREX-AQ campaign in July …
Can hillslopes keep pace with landslide frequency in the humid tropics of Puerto Rico (USA)?
Bedrock weathering and soil production set the rate that hillslope colluvium is produced, while material properties determine whether sediment can fail under a given set of condit…
Comparison of techniques for coupled earthquake and tsunami modeling
From interpreting data to scenario modeling of subduction events, numerical modeling has been crucial for studying tsunami generation by earthquakes. Seafloor instruments in the s…
Impact of changing concavity indices on channel steepness and divide migration metrics
The concavity index, $\theta$, describes how quickly river channel gradient declines downstream. It is used in calculations of normalized channel steepness index, $k_{sn}$, a metr…
Surface Turbulence Reveals Riverbed Drag Coefficient
Flow in rivers and the coastal ocean is controlled by the frictional force exerted on the water by riverbed or seabed roughness. The frictional force is typically characterized by…
Sensitivity of permeability changes to different earthquakes in a fault zone: Possible evidence of their dependence on …
Changes in the permeability of a fault zone are dependent upon the frequency of seismic waves, and is an important phenomenon whose mechanisms have not be completely elucidated to…
Dual-lobe reconnection and cusp-aligned auroral arcs
Following the St. Patrick’s Day (17 March) geomagnetic storm of 2013, the interplanetary magnetic field had near-zero clock angle for almost two days. Throughout this period multi…
Reply to: “Global data of (ultra)high-pressure metamorphism do not call for excessive overpressures”
D. Jiang submitted a comment entitled « Metamorphic data from global subduction zones do not call for excessive overpressures » to Nature Geoscience. His comment on our paper enti…
Contribution of Atmospheric Circulation Changes and Anthropogenic Warming to the Increase of Warm Season Fire Weather R…
Recent increasing wildfire activities in California have raised widespread public concerns. This raises a question as to whether the increase of of fire weather this year and in r…
Challenges and Capabilities in Estimating Snow Mass Intercepted in Conifer Canopies with Tree Sway Monitoring
Snowpack accumulation in forested watersheds depends on the amount of snow intercepted in the canopy and its partitioning into sublimation, unloading, and melt. A lack of canopy s…
Scaling laws for mixed-heated stagnant-lid convection and application to Europa
Because rocks and ices viscosities strongly depend on temperature, planetary mantles and ice shells are often thought to be animated by stagnant-lid convection. Their dynamics is …
Statistical Study of Electron Density Enhancements in the Ionospheric F Region Associated with Pulsating Auroras
Pulsating auroras (PsAs) are considered to be caused by energetic (~10 keV) electron precipitations. Additionally, soft electron precipitations (~1 keV) have often been observed i…
The Character and Changing Frequency of Extreme California Fire Weather
Five of California’s ten largest wildfires occurred in 2020, with the largest complex shattering the previous record by more than 100 %. The year follows a decade containing extra…
Seasonal Variability in Local Carbon Dioxide Combustion Sources over the Central and Eastern US using Airborne In-Situ …
We present observations of local enhancements in carbon dioxide (CO 2 ) from local emissions sources over three eastern US regions during four deployments of the Atmospheric Carbo…
Frequency Dependent Mantle Viscoelasticity via the Complex Viscosity: cases from Antarctica and Western North America
Studies of glacial isostatic adjustment (GIA) often use paleoshorelines and present-day deformation to constrain the viscosity of the mantle and the thickness of the lithosphere. …
NWP Ocean Calibration for the CFOSAT wind scatterometer and wind retrieval evaluation
The unique rotating fan-beam feature of SCAT onboard CFOSAT leads to varying geometries across the swath and furthermore leads to varying wind retrieval performance across the swa…
Modulation of the Convectively Coupled Kelvin Waves by the MJO over different domains
In this study we have examined the modulation of convectively coupled Kelvin waves (CCKW) by different Madden-Julian oscillation (MJO) states over the Indian, Pacific and Atlantic…
Bottom-up identification of key elements of compound events
Compound weather and climate events are combinations of climate drivers and/or hazards that contribute to societal or environmental risk. Studying compound events often requires a…
Trophic state assessment of a freshwater Himalayan lake using Landsat 8 OLI satellite imagery: A case study of Wular La…
A new version of Trophic State Index for freshwater Himalayan lake (TSIFHL) has been derived from Landsat 8 OLI to determine the aquatic health of the lake ecosystem. TSIFHL is ba…
MagIC as a FAIR repository for America's directional archaeomagnetic legacy data
Beginning in 1964, an academic lineage of Robert DuBois and his students, Daniel Wolfman and Jeffrey Eighmy, developed dedicated United States-based archaeomagnetic research progr…
No Internal Connections Detected Between Leading Decadal to Multidecadal Climate Modes in North Atlantic and North Paci…
Previous studies have attempted to unravel possible connections between leading decadal to multidecadal climate modes in the North Atlantic and North Pacific ocean basins, the Atl…
Lake spray aerosol emissions alter nitrogen partitioning in the Great Lakes region
We develop a new, wind-driven lake spray aerosol (LSA) emissions parameterization that resolves both particle size and chemical composition, and investigate the impact of these em…
Quantifying hydraulic roughness from field data: can dune morphology tell the whole story?
Hydraulic roughness is a fundamental property in river research, as it directly affects water levels, flow strength and the associated sediment transport rates. However quantifica…
Achieving equilibrium as a semi-alluvial channel: anthropogenic, bedrock, and colluvial controls on the White Clay Cree…
Based on well-developed hydraulic geometry relations for width and depth, classic studies initially interpreted the Mid-Atlantic White Clay Creek (WCC) as a quasi-equilibrium, all…
Seismic and aseismic fault slip during the initiation phase of the 2017 Mw=6.9 Valparaiso earthquake.
Transient deformations associated with foreshocks activity has been observed before large earthquakes, suggesting the occurrence of a detectable pre-seismic slow slip during the i…
In is not Out: Closing the Floating Macroplastic Mass Balance for The Hong-Duong Bifurcation in The Red River, Vietnam
Regarding transport of macroplastic (>5 mm) in rivers, its division over bifurcations is still an understudied topic. However, this is a critical knowledge to estimate plastic emi…
Influence of Pleistocene sea-level lows on offshore fresh groundwater reservoirs - a numerical case study on the New Je…
Offshore fresh groundwater reservoirs occur on continental shelves in several regions of the world. But their origins are often poorly understood and an area of active research. I…
Detection and mapping of Earth body resonances with cGPS
I recently showed that Mw5.6+ earthquakes occur due to (as the lithosphere rides on) vast waves of the Moon-driven and gravitationally aided 1–72h long-periodic Earth body resonan…
Structure and Geochronology of the Wayanad Schist Belt, Western Dharwar Craton, Southern India
The Wayanad Schist Belt (WSB) located along the southern margin of the Western Dharwar Craton (WDC) is a small discontinuous schistose belt occur as pockets and patches within bas…
On the solution of the multiple collocation problem
A new solution method is given for the general multiple collocation problem formulated in terms of the covariance equations. By a logarithmic transformation, the covariance equati…
Correction of SMAP (Soil Moisture Active Passive) Satellite Retrieved Soil Moisture Data using Machine Learning Techniq…
Bangladesh, part of Indo-Gangetic-Brahmaputra Plain, is frequently affected by floods and droughts. As the economy of Bangladesh is still agriculture based, effective measurement …
Effects of Using High Resolution Satellite-based Inundation Time Series to Estimate Methane Fluxes from Forested Wetlan…
A major source of uncertainty in the global methane budget arises from quantifying the area of wetlands and other inland waters. This study addresses how the dynamics of surface w…
Fossil woods from the lower Miocene of Myanmar (Natma Formation): paleoenvironmental and biogeographic implications
The paleobotanical record of Myanmar is poorly documented despite its importance for understanding the evolution of Asian monsoonal ecosystems through time. Here, we describe seve…
Revisiting Subglacial Hydrology as an Origin for Mars' Valley Networks
Although the nature of the early Martian climate is a matter of considerable debate, the presence of valley networks (VN) provides unambiguous evidence for the presence of liquid …
A DDS based clock drift correction method of underwater electromagnetic acquisition system
The most important task of the seabed electromagnetic data acquisition station is to discretize and sample the marine geophysical field signal according to the set working paramet…
Correcting weather and climate models by machine learning nudged historical simulations
Due to limited resolution and inaccurate physical parameterizations, weather and climate models consistently develop biases compared to the observed atmosphere. These biases are p…
Inter-annual and decadal tidal variability in the South China Sea using S_TIDE
Understanding time-changing tidal characteristics is essential for numerous practical purposes, such as flood prevention, navigation, and ocean engineering. Previous studies mainl…
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