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Showing 8151 to 8200 of 59105 works
Revealing the Evolution and Small-Scale Variability of the Morning Transition Phase in the atmospheric boundary layer u…
During the morning transition, the nocturnal stable boundary layer, SBL, turns into the daytime convective boundary layer, making it an important phase for modelling and predictin…
Chronology and eccentricity phasing for the Early Turonian greenhouse (~93-94 Ma): constraints on astronomical control …
The Early Turonian interval represents a unique confluence of climatic and oceanographic conditions including peak surface temperatures, high greenhouse-gas concentrations and max…
Optimal estimation of snow and ice surface parameters from imaging spectroscopy measurements
Snow and ice melt processes are a key in Earth’s energy-balance and hydrological cycle. Their quantification facilitates predictions of meltwater runoff as well as distribution an…
NO2 anomalies - economy attribution and rapid climate response
Using principal component (PC) analysis of 16 years of monthly series of nitrogen dioxide (NO2) from the Ozone Monitoring Instrument on the Aura satellite, we show that it is the …
Origin of Tropospheric Air Masses in the Tropical West Pacific identified by Balloon-borne Ozone and Water Vapor Measur…
Motivated by previous measurements of very low tropospheric ozone concentrations in the Tropical West Pacific (TWP) and the implied low oxidizing capacity of this key region for t…
The fallacy in the use of the “best-fit” solution in hydrologic modeling
The use of the parameters associated with the “best-fit” criterion to represent a calibrated hydrological model is inadequate. Furthermore, assessing the goodness of model calibra…
The Fate of Sediment After a Large Earthquake
Large earthquakes rapidly denude hillslopes by triggering thousands of coseismic landslides. The sediment produced by these landslides is initially quickly mobilised from the land…
Automatic Delineation of Grounding Lines from Differential InSAR along the Getz Ice Shelf, Antarctica, using a Machine …
The position of the grounding line of marine terminating glaciers, the boundary where glacier ice is no longer supported by the ground and starts floating, is a key parameter for …
Solar Energetic Particle Events of July 2017: Multi-spacecraft Observations near 1 and 1.5 AU
We investigate the solar events of late solar cycle 24 in July 2017 observed by a number of spacecraft in the inner heliosphere widely separated in heliolongitude and radial dista…
Hidden Archives of Environmental Change: Application of Mass Spectrometry Methods in Coral Reef Science
In coral reef studies, mass spectrometry methods are widely applied to determine geochemical proxies in corals as a tool to evaluate seawater changes. As the coral grows, its skel…
The Role of Stokes drift in Dynamics of Bohai Sea, China under Typhoon Condition
The role of Stokes drift production (SDP), including Coriolis-Stokes forcing, small scale Langmuir circulation and resolved-scale Craik-Leibovich vortex forcing, in ocean dynamics…
Cryospheric Hazards in the Rio Volcan Basin, Chilean Central Andes: One Region, Multiple Phenomena
The Chilean central Andes are known for its variety of cryospheric landforms, which have included almost every kind of glacier since their first exploration back in the XIX centur…
Effects of Aquatic Vegetation on Gas Exchange Process Across Air-Water and Sediment-Water Interface
Aquatic vegetation alters the hydrodynamics of natural waters, such as rivers, lakes, and estuaries. Plants can generate turbulence that propagates throughout the entire water col…
Initial investigation of environment vs policy vs social influences on SARS-CoV-2/COVID-19 incidence, propagation, and …
SARS-CoV-2/COVID-19 propagated rapidly from a local outbreak to global scales with associated multi-trillion $ impact on the international economy and social, economic, and ecolog…
So Why Does The Drought Map Look Like That? Unpacking The Linkages Between The Transparency Of Drought Monitoring Proce…
During recent droughts in North Carolina, various audiences have articulated needs for information that explains current or anticipated impacts, droughts’ geographic extent and ti…
Paleoclimatology and Paleoceanography Perspectives on Integrated, Coordinated, Open, Networked (ICON) Science
This article is composed of three independent commentaries about the state of ICON principles (Goldman et al., 2021) in the AGU section Paleoclimatology and Paleoceanography (P&P)…
Garbage-In Garbage-Out (GIGO): The Use and Abuse of Combustion Modeling and Recent U.S. Spacelaunch Environmental Impac…
Although adequately detailed kerosene chemical-combustion Arrhenius reaction-rate suites were not readily available for combustion modeling until ca. the 1990’s (e.g., Marinov [19…
Turbulent Thermal Image Velocimetry at the Immediate Fire and Atmospheric Interface
We present novel in-field vegetation fire observations, and the analyses used to process the data, using brightness temperatures recorded by longwave infrared camera and thermal i…
NASA GEOS Composition Forecast Modeling System GEOS-CF v1.0: Stratospheric composition
The NASA Goddard Earth Observing System (GEOS) Composition Forecast (GEOS-CF) provides recent estimates and five-day forecasts of atmospheric composition to the public in near-rea…
Constraining the Location of the Outer Boundary of Earth's Outer Radiation Belt
Characterising the location of the outer boundary of the outer radiation belt is a key aspect of improving radiation belt models and helps to constrain our understanding of the me…
Sediment-organism interaction as a control on hyporheic exchange flows: effect of body size of the organisms
Streambed inhabitants mix and mobilize sediments by actions such as burrowing, feeding, and excretion, a process referred to as sediment reworking. This sediment-organism interact…
Comment on “Properties of the recovery phase of extreme storms” by Choraghe et al. (2021)
Choraghe et al. (2021), based on a study of the recovery phase of the SYM-H index of 31 extreme geomagnetic storms, have recently concluded that the hyperbolic decay function is o…
Discovery of a 3.46 billion-year-old impact crater in Western Australia
Current models for the origin and constituents of Earth are based primarily on compositions of meteorites that fell recently (within the past ~1 million years) on Earth. Here we r…
Shipping Emissions in Rapidly Growing Seaports in Africa Determined with TROPOMI
Seaports in Africa are expanding rapidly to meet an increasing demand for imported goods in Africa and for natural resources and manufactured goods from the continent. Emissions f…
The impact of Radial and Quasi-Radial IMF on the Earth's Magnetopause Size and Shape, and Dawn-Dusk Asymmetry from Glob…
The boundary between the solar wind (SW) and the Earth’s magnetosphere, named the magnetopause (MP), is highly dynamic. Its location and shape can vary as a function of different …
Characterization and Evolution of Organized Shallow Convection in the Trades
Four previously identified patterns of meso-scale cloud organization in the trades -- called Sugar, Gravel, Flowers and Fish -- are studied using long-term records of ground-based…
Benthic biolayer structure controls whole-stream reactive transport
Hyporheic zone reaction rates are highest just below the sediment-water interface, in a shallow region called the benthic biolayer. Vertical variability of hyporheic reaction rate…
Preliminary study of offshore wind farm sites on the Southern coast of Brazil
Wind power is one of the options for sustainable power generation in the world. Moreover, offshore wind farms are considered more efficient compared to onshore wind farms. Due to …
Impact of unmitigated HFC emissions on stratospheric ozone at the end of the 21st century as simulated by chemistry-cli…
Hydrofluorocarbons (HFCs) have been increasingly replacing chlorofluorocarbons and hydrochlorofluorocarbons. Although their ozone-depleting potential is negligible, as potent gree…
A model of C4 photosynthetic acclimation based on least-cost optimality theory suitable for Earth System Model incorpor…
Empirical studies have shown that plant photosynthetic responses to environmental change can vary over time due to acclimation, but acclimation responses are often not included in…
Examination of Current and Future Permafrost Dynamics Across the North American Taiga-Tundra Ecotone
In the Arctic, the spatial distribution of boreal forest cover and soil profile transition characterizing the taiga-tundra ecological transition zone (TTE) is experiencing an alar…
Carbon dioxide distribution, origins, and transport along a frontal boundary during summer in mid-latitudes
Synoptic weather systems are a major driver of spatial gradients in atmospheric CO2 mole fractions. During frontal passages, air masses from different regions meet at the frontal …
The 2004 tectonic and hydrothermal crisis in the Danakil depression: documenting the last continental step prior to oce…
The Danakil depression in Ethiopia, at the end of the southern Red Sea, has been the locus of volcanic crises in 2004-10, with emplacement of 15 dykes: one, non-emergent, in Lake …
Stress Drop Variations of Induced Earthquakes at the Dallas-Fort Worth Airport, Texas
Stress drops for injection-induced earthquakes near the Dallas-Fort Worth International Airport in the Fort Worth Basin (FWB), Texas are estimated. The mean stress drop for the Ai…
Are Cyanobacterial Blooms Common in the Coastal Waters of Alaska?
The community of Kotzebue, located on the coast of Kotzebue Sound, which is northeast of the Bering Straits adjacent to the Chukchi Sea, is reliant on the waters around Kotzebue S…
Examination of Current and Future Permafrost Dynamics Across the North American Taiga-Tundra Ecotone
In the Arctic, the spatial distribution of boreal forest cover and soil profile transition characterizing the taiga-tundra ecological transition zone (TTE) is experiencing an alar…
Modeling Photosynthesis and Exudation of DOM in Subtropical Oceans
Parameterizations of algal photosynthesis commonly employed in global biogeochemical simulations generally fail to capture the observed vertical structure of primary production. H…
Characteristics of Robust Mesoscale Eddies in the Gulf of Mexico
Although several studies on mesoscale eddies in the Gulf of Mexico (GoM) have been conducted, a comprehensive study on their temporal and spatial characteristics is still lacking.…
The impact of Radial and Quasi-Radial IMF on the Earth's Magnetopause Size and Shape, and Dawn-Dusk 2 Asymmetry from Gl…
The boundary between the solar wind (SW) and the Earth’s magnetosphere, named the magnetopause (MP), is highly dynamic. Its location and shape can vary as a function of different …
A discrete-domain approach to three-phase hysteresis in porous media
We present a discrete-domain approach to three-phase displacements and hysteresis in porous media. In this method, constrained energy minimization leads to evolution equations for…
Thermal Features of Lunar Regolith in Mare Humboldtianum based on Brightness Temperature Differences and Surface Parame…
Mare Humboldtianum is a Nectarian-aged basin on the northeast limb of the Moon, whose inner ring was flooded by basalt billions of years ago. The topography of Mare Humbold is rat…
Diel redox cycle of manganese in the surface Arctic Ocean
Knowledge of the chemical speciation of particulate manganese (pMn) is important for understanding the biogeochemical cycling of Mn and other particle-reactive elements. Here, we …
S-wave velocity structure of the Sichuan-Yunnan region, China: implications for extrusion of Tibet Plateau and seismic …
The Sichuan-Yunnan region is located at the intersection between the South China Block, the Indian plate and the Tibet Plateau and is crisscrossed with deep and large faults and i…
Late Quaternary left-lateral strike slip rate along the Anninghe-Zemuhe Section of the Xianshuihe-Xiaojiang Fault Syste…
Crustal material eastward extrusion from the Tibetan Plateau is closely related to the strike-slip faults in the SE margin of the Tibetan Plateau. The left-lateral strike-slip Xia…
Data-driven constraints on earthquake modeling and rupture segmentation from teleseismic multi-array backprojection and…
Earthquakes have been observed to rupture in segments. A good understanding of rupture segmentation is important to characterize fault geometries at depth for follow-up tectonic, …
Inflation and Asymmetric Collapse at Kīlauea Summit during the 2018 Eruption from Seismic and Infrasound Analyses
Characterizing the large M4.7+ seismic events during the 2018 Kīlauea eruption is important to understand the complex subsurface deformation at the Kīlauea summit. The first 12 ev…
Economic Benefits of Forecast Informed Reservoir Operations (FIRO): Lake Mendocino Case-Study and Transferable Decision…
Forecast-Informed Reservoir Operations (FIRO) enables modern weather forecasting technology to be incorporated into Water Control Plans. FIRO provides water managers with more lea…
Global-scale shifts in Anthropocene rooting depths pose unexamined consequences in critical zone functioning
Rooting depth is an ecosystem trait that determines the extent of soil development and carbon cycling. Recent hypotheses propose that human-induced changes to Earth’s biogeochemic…
Demons in the North Atlantic: Variability of deep ocean ventilation
Translation of atmospheric forcing variability into the ocean interior via ocean ventilation is an important aspect of transient climate change. On a seasonal timescale, this tran…
Cloud Condensation Model from Radiosonde and Ceilometer Measurements Comparison
Due to their importance for Earth’s climate, the formation of clouds is extensively studied, and especially their formation inside the atmospheric boundary layer (ABL). Radiosonde…
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