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Showing 1101 to 1150 of 59105 works

Improving the QBO Forcing by Resolved Waves with Vertical Grid Refinement in E3SMv2

The quasi-biennial oscillation (QBO) is the strongest mode of variability in the tropical stratosphere and plays an important role in stratospheric dynamics and chemistry. The QBO…

Generalized Time-Series Analysis for In-Situ Spacecraft Observations: Anomaly Detection and Data Prioritization using P…

In-situ spacecraft observations are critical to our study and understanding of the various phenomena that couple mass, momentum, and energy throughout near-Earth space and beyond.…

Internally-driven variability of the Angola Low is the main source of uncertainty for the future changes in southern Af…

Variations in southern African precipitation have a major impact on local communities, increasing climate-related risks and affecting water and food security, as well as natural e…

Groundwater recharge assessment and hydrometeorological scenario in the Fetam catchment Upper Blue Nile Basin, Ethiopia.

Groundwater serves as a vital freshwater source for communities in Ethiopia, particularly in regions like the Fetam River Catchment within the Upper Blue Nile Basin, where relianc…

Coupling Remote Sensing with a Process Model for the Simulation of Rangeland Carbon Dynamics

Rangelands provide significant environmental benefits through many ecosystem services, which may include soil organic carbon (SOC) sequestration. However, quantifying SOC stocks a…

Global warming and equatorial Atlantic paleoceanographic changes during early Eocene carbon cycle perturbation V

A series of transient global warming events (“hyperthermals”) in the early Eocene is marked by massive environmental and carbon cycle change. Among these events, the impacts of th…

First Results from a Hybrid Network of Reference and Low-Cost PM2.5 Monitors in Mombasa, Kenya

The paucity of fine particulate matter (PM2.5) measurements limits estimates of air pollution mortality in Sub-Saharan Africa. If well calibrated, low-cost sensors can provide rel…

A Bespoke Approach to Quantifying the Impacts of Disasters, Using Stakeholder-relevant Metrics

Disaster impact metrics (DIMs) are key outputs of natural-hazard risk models/assessments that provide a tangible way of communicating risk. However, typical DIMs are limited in th…

Influence of the Madagascar Ridge on Eddy Variability in the Agulhas Current System: A Modelling Study

A regional ocean model was used to study the influence of the Madagascar Ridge on the circulation and eddy variability in the Agulhas Current system. In the control experiment, th…

Measuring Amazon rainfall intensity with sound recorders

Ground weather observations are scarce in many parts of the globe, hampering effective climate monitoring and disaster management. In the Amazon basin, this occurs due to its remo…

Retrieving seismic source characteristics using seismic and infrasound data: The 2020 mb 4.9 Kiruna minequake, Sweden

A minequake of magnitude m 4.9 occurred on 18 May 2020 early in the morning at the LKAB underground iron ore mine in Kiruna, Sweden. This is the largest mining-induced earthquake …

Data Drought in the Humid Tropics: How to Overcome the Cloud Barrier in Greenhouse Gas Remote Sensing

Diagnosing land-atmosphere fluxes of carbon-dioxide (CO$_2$) and methane (CH$_4$), is essential for evaluating carbon-climate feedbacks. Greenhouse gas satellite missions aim to f…

The evolution of the Hunga hydration in a moistening stratosphere

The 2022 Hunga eruption caused unprecedented stratospheric hydration.  Aura Microwave Limb Sounder (MLS) measurements show that the stratospheric water vapor mass remains essentia…

Monitoring Water Level Trend Using River Cameras: Integrating Domain-Specific Models and Segment Anything Model (SAM) f…

Water level variations influence the biochemical and hydrological processes within river networks. Through river cameras, obtaining reliable water segmentation from image data c…

Regimes of cloud vertical structure from active observations

We introduce a new type of cloud class, which we call “active cloud regime” (ACR), owing to its provenance from active (lidar and cloud radar) spaceborne cloud observations. The A…

The observed El Niño-induced droughts from April to May 2023 increase the risk of famine in West Africa

The return of El Niño in 2023 brought record-breaking global temperatures, an increase in the number of forest fires, flooding, heatwaves, and intense and severe droughts. This pa…

Longitude Structure of Wavenumber 4 of the Ionosphere after Midnight Based on the OI135.6 nm Night Airglow Using FY-3D …

In this study, based on the OI135.6 nm night airglow data of the FY-3D Ionospheric Photometer (IPM) during the 2018-2021 geomagnetically quiet period, the global wavenumber 4 long…

On the use of SuperDARN Ground Backscatter Measurements for Ionospheric Propagation Model Validation

Prior to use in operational systems, it is essential to validate ionospheric models in a manner relevant to their intended application to ensure satisfactory performance. For Over…

Aeolus winds improve Arctic weather prediction

It has been proven that assimilating winds from the Aeolus global Doppler wind lidar would enhance the predictive skill of weather forecast models. In this study, we use a series …

Assessing the time of emergence of global ocean fish biomass using ensemble climate to fish simulations

Climate change is anticipated to considerably reduce global marine fish biomass, driving marine ecosystems into unprecedented states with no historical analogues. The Time of Emer…

Rethinking the susceptibility-based strategy for marine cloud brightening climate intervention: experiment with CESM2 a…

Previous modeling studies indicate that even though marine cloud brightening under a susceptibility-based strategy is effective in reducing the global average surface temperature,…

The Impact of Temperature on the Adiabaticity and Coverage of a Single Shallow Cumulus Cloud

The uncertainty of climate projection is significantly contributed by warm cloud feedback, which involves a complex interplay of various mechanisms. However, it is hard to unentan…

Isotopic Analysis of NH 4 + Collected Using Active Samplers: Insights from Urban Beijing Field Measurements

Active collection methods such as ChemComb Speciation Cartridge samplers (CCSCs) are considered more accurate for determining the isotopic composition of ammonia (NH 3 ) and pa…

An Economical Open-Source Lagrangian Drifter Design to Measure Deep Currents in Lakes

The objective was to construct and test an economical, accurate, and open-source Lagrangian drifter design suitable for lakes <200 km2. Lagrangian drifters are used to trace water…

Crustal deformation and seismic velocity perturbations in the Alto Tiberina fault zone (Northern Apennines, Italy)

Crustal perturbations related to seismic activity can generally be observed with the occurrence of a large magnitude event. For less energetic seismic sequences though, the associ…

Quasi 6-Day Planetary Wave Oscillations in Equatorial Plasma Irregularities

The influence of atmospheric planetary waves on the occurrence of irregularities in the low latitude ionosphere is investigated using Whole Atmosphere Community Climate Model with…

Flow and deformation in Earth's deepest mantle from geodynamic modeling and implications for seismic anisotropy

The dynamics of Earth’s D” layer at the base of the mantle plays an essential role in Earth’s thermal and chemical evolution. Mantle convection in D” is thought to result in seism…

Robust reconstruction of historical climate change from permafrost boreholes

Reconstructing historical climate change from deep ground temperature measurements in cold regions is often complicated by the presence of permafrost. Existing methods are typical…

Updated Smoke Exposure Estimate for Indonesian Peatland Fires using a Network of Lowcost PM2.5 sensors and a regional a…

Indonesia accounts for more than one third of the world’s tropical peatlands. Much of the peatland in Indonesia has been deforested and drained, meaning it is more susceptible to …

REMOTE DETERMINATION OF MARTIAN CHLORIDE SALT ABUNDANCES.

Chloride salt-bearing deposits are widely distributed across the southern highlands of Mars. Because chloride salts are highly water-soluble, these deposits may be representative …

Direct in-situ Estimates of Energy and Force Balance in Near Earth Collisionless Plasmas

Fundamental processes in plasmas act to convert energies into different forms, e.g., electromagnetic, kinetic and thermal. Direct derivation from the Valsov-Maxwell equation yield…

Lithospheric Thickness, Rift and Inversion Tectonics: The Formation and Deformation of the Neoproterozoic Katangan Basi…

The tectono-stratigraphic development of continental basins is key to our understanding of the location and scale of metal deposits required by the energy transition. We examine t…

Responses of field-aligned currents and equatorial electrojet to sudden decrease of solar wind dynamic pressure during …

We present a study of the magnetosphere-ionosphere coupling during the 23 March 2023 magnetic storm, focusing on the effect of the drastic decrease of the solar wind dynamic press…

Vertically resolved analysis of the Madden-Julian Oscillation highlights the role of convective transport of moist stat…

We simulate the Madden-Julian oscillation (MJO) over an aquaplanet with uniform surface temperature using the multiscale modeling framework (MMF) configuration of the Energy Exasc…

High Spatiotemporal Resolution River Networks Mapping on Catchment Scale Using Satellite Remote Sensing Imagery and DEM…

Characterizing and understanding the changes in the flow regimes of rivers have been challenging. Existing global river network datasets are not updated and can only identify ri…

The Promise and Pitfalls of Machine Learning in Ocean Remote Sensing

The proliferation of easily accessible machine learning algorithms and their apparent successes at inference and classification in computer vision and the sciences has motivated t…

Towards improved Arctic wetland classification: a clustering analysis of wetland carbon flux and environmental data

Rapid environmental change in the Arctic raises concerns about the future of wetland carbon dynamics. Current classifications may not capture the diverse environmental conditions …

An Ensemble Modeling Framework for Propagating Solar Wind Conditions to Jupiter

The important question of how the solar wind influences Jupiter's magnetosphere is difficult to answer due to the lack of consistent up-stream monitoring of the interplanetary med…

Effect of Acid Strength on Spontaneous Imbibition in Calcareous and Siliceous Rocks

Capillary rise experiments are conducted in a set of calcareous and siliceous rocks with varying mineralogy and petrophysical properties to understand the coupled impact of reacti…

A new WENO-based momentum advection scheme for simulations of ocean mesoscale turbulence

Current eddy-permitting and eddy-resolving ocean models require dissipation to prevent a spurious accumulation of enstrophy at the grid scale. We introduce a new numerical scheme …

Gulf Stream Moisture Fluxes Impact Atmospheric Blocks Throughout the Northern Hemisphere

In this study, we explore the impact of oceanic moisture fluxes on atmospheric blocks using the ECMWF Integrated Forecast System. Artificially suppressing surface latent heat flux…

An Improved Bio-Physical Parameterization for Radiant Heating in the Surface Ocean

Solar heating of the upper ocean is a primary energy input to the ocean-atmosphere system, and the vertical heating profile is modified by the concentration of phytoplankton in th…

Spatiotemporal Topic Modeling Reveals Storm-Driven Advection and Stirring Control Plankton Community Variability in an …

Phytoplankton communities in the open ocean are high-dimensional, sparse, and spatiotemporally heterogeneous. The advent of automated imaging systems has enabled high-resolution o…

Ter-diurnal Atmospheric Tide on Mars

Cyclic absorption of solar radiation generates oscillations in atmospheric fields. These oscillations are called atmospheric or thermal tides, which are furthermore modified by to…

Estimation of spectral solar irradiance in the ecliptic plane using synthetic solar surface magnetograms

The primary external energy input to planetary atmospheres comes from solar radiation. Accurate estimates of solar irradiance are needed in order to understand atmospheric conditi…

A Flexible Approach to Parameterize the Optical Properties of Clouds and Precipitation

In this study, a novel optics scheme for cloud and precipitation modeling is introduced. Based on the Mie theory and existing datasets on ice crystals, the scheme offers an open-s…

The Role of Talus Pile Mobility in Valley Widening Processes and the Development of Wide Bedrock Valleys, Buffalo River…

Valley width is controlled by lithology and upstream drainage area, but little work has focused on identifying the processes that control bedrock valley widening. Bedrock valleys …

PRIME-SH: A Data-Driven Probabilistic Model of Earth’s Magnetosheath

A data-driven model of Earth’s magnetosheath is developed by training a Bayesian recurrent neural network to reproduce Magnetospheric MultiScale (MMS) measurements of the magnetos…

Comparison of Precipitation Trends and its Effect on Lake Water Levels Using Satellite Altimetry: A Case Study of Lakes…

Water levels in lakes is a determinant of water availability for optimum water resources planning and ecosystem functioning. This study examines the surface water fluctuations i…

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