A5034314444- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Meteorological Phenomena and Simulations
- Precipitation Measurement and Analysis
- Atmospheric Ozone and Climate
- Lightning and Electromagnetic Phenomena
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Air Quality and Health Impacts
- Tropical and Extratropical Cyclones Research
- Fire effects on ecosystems
- Wind Energy Research and Development
- Air Quality Monitoring and Forecasting
- Physical Education and Pedagogy
- Aerosol Filtration and Electrostatic Precipitation
- Particle Dynamics in Fluid Flows
- Icing and De-icing Technologies
- Gene expression and cancer classification
- Inclusion and Disability in Education and Sport
- Aeolian processes and effects
- Neural Networks and Applications
- Ocean Waves and Remote Sensing
- Soil Moisture and Remote Sensing
- Fluid Dynamics and Heat Transfer
Cooperative Institute for Mesoscale Meteorological Studies
2019-2024
University of Oklahoma
2019-2024
NOAA National Severe Storms Laboratory
2019-2024
Texas A&M University
2014-2022
National Oceanic and Atmospheric Administration
2022
Hebrew University of Jerusalem
2020
Institute of Urban Environment
2016
Chinese Academy of Sciences
2016
Brookhaven National Laboratory
2016
Harbin Engineering University
2015
Significance Exceedingly high levels of fine particulate matter (PM) occur frequently in China, but the mechanism severe haze formation remains unclear. From atmospheric measurements two Chinese megacities and laboratory experiments, we show that oxidation SO 2 by NO occurs efficiently aqueous media under polluted conditions: first, during 1952 London Fog via in-cloud oxidation; second, on PM with NH 3 neutralization China. We suggest effective mitigation is achievable intervening sulfate...
Significance Increasing levels of air pollutants in Asia have recently drawn considerable attention, but the effects Asian pollution outflows on regional climate and global atmospheric circulation remain to be quantified. Using a multiscale aerosol–climate model (GCM), we demonstrate long-range transport pollution, large resulting variations aerosol optical depth, cloud droplet number concentration, ice water paths; enhanced shortwave longwave radiative forcings; increased precipitation...
Abstract. Changes in land cover and aerosols resulting from urbanization may impact convective clouds precipitation. Here we investigate how Houston can modify sea-breeze-induced cloud precipitation through the urban effect anthropogenic aerosol effect. The simulations are carried out with Chemistry version of Weather Research Forecasting model (WRF-Chem), which is coupled spectral-bin microphysics (SBM) multilayer a building energy (BEM-BEP). We find that (the joint both aerosols) notably...
Abstract Hypotheses have been proposed for decades about the effect of activated cloud condensation nuclei (CCN) on delaying warm rain process, invigorating deep convective vertical development, and enhancing mixed‐phase processes. Observational support has only qualitative with mixed results due to lack regional measurements CCN concentration (N ), while simulations not produced a robust consensus. Quantitative assessments these relationships became possible advent N retrievals from...
Linear sequence modeling methods, such as linear attention, state space modeling, and RNNs, offer significant efficiency improvements by reducing the complexity of training inference. However, these methods typically compress entire input into a single fixed-size memory state, which leads to suboptimal performance on recall-intensive downstream tasks. Drawing inspiration from neuroscience, particularly brain's ability maintain robust long-term while mitigating "memory interference", we...
Abstract The radiative and microphysical properties of Saharan dust are believed to impact the Atlantic regional climate tropical cyclones (TCs), but detailed mechanism remains uncertain. In this study, atmosphere-only simulations performed from 2002 2006 using Community Atmospheric Model, version 5.1, with without emission Sahara Desert. exhibits noticeable impacts on longwave shortwave radiation, cloud formation, convective systems over West Africa Atlantic. African easterly jet monsoon...
Abstract A continental cloud complex, consisting of shallow cumuli, a deep convective (DCC), and stratus, is simulated by cloud-resolving Weather Research Forecasting Model to investigate the aerosol microphysical effect (AME) radiative (ARE) on various regimes their transitions during Department Energy Routine Atmospheric Radiation Measurement Aerial Facility Clouds with Low Optical Water Depths Radiative Observations (RACORO) campaign. Under an elevated loading AME only, reduced cloudiness...
Abstract This study analyzes the microphysics and precipitation pattern of Hurricanes Harvey (2017) Florence (2018) in both eyewall outer rainband regions. From retrievals by a satellite red–green–blue scheme, rainbands show strong convective structure while inner has less vigor (i.e., weaker upper-level reflectivities electrification), which may be related to stronger vertical wind shear that hinders fast motions. The WSR-88D column-vertical profiles further confirm clouds have motion large...
Abstract Polarimetric radar observations from the NEXRAD WSR-88D operational network in contiguous United States, routinely available since 2013, are used to reveal three prominent microphysical signatures landfalling tropical cyclones: 1) hydrometeor size sorting within eyewall convection, 2) vertical displacement of melting layer inner core, and 3) dendritic growth layers stratiform regions core. Size convection observed with greater frequency prominence more intense hurricanes,...
Abstract. Severe regional haze events, which are characterized by exceedingly high levels of fine particulate matter (PM), occur frequently in many developing countries (such as China and India), with profound implications for human health, weather, climate. The occurrence the extremes involves a complex interplay between primary emissions, secondary formation, conducive meteorological conditions, relative contributions various processes remain unclear. Here we investigated severe episodes...
Abstract This study evaluates ice particle size distribution and aspect ratio φ Multi-Radar Multi-Sensor (MRMS) dual-polarization radar retrievals through a direct comparison with two legs of observational aircraft data obtained during winter storm case from the Investigation Microphysics Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) campaign. In situ cloud probes, satellite, MRMS observations illustrate that often-observed K dp Z DR enhancement regions in dendritic...
Abstract Accurate tracking of all components (including core, anvil, and cirrus) deep convective systems (DCSs) throughout their lifecycle is key to quantifying impacts on radiative forcing, especially the anvil cirrus. Here, a new Full‐tracking Algorithm for Convective Thunderstorm System developed based geostationary satellite. It successfully tracks DCSs starting from initial core complete dissipation cirrus detrained them, integrates related that split into whole DCS. Results show more...
A numerical model based on Navier-Stokes equation is developed to simulate the interface evolution of flooding flows. The two-dimensional fluid domain discretised by structured rectangular elements according finite volume method (FVM). between air and liquid captured through compressive capturing scheme for arbitrary meshes (CICSAM) idea (VOF). semiimplicit pressure linked equations (SIMPLE) used pressure-velocity coupling. second order upwind discretization applied momentum equations. Both...
Abstract Most existing cloud models tend to overestimate the size of ice particles and underestimate their concentration. This emphasizes need provide a reliable observational reference optimize model performance, particularly in areas high concentration at altitudes. The dual‐polarization radars give community unique opportunity quantify with good accuracy using polarimetric radar retrievals. In this study, we utilize network operational WSR‐88D build climatology vertical profiles...
Abstract For over three decades, the Atmospheric Radiation Measurement (ARM) Program user facility has provided researchers with invaluable benchmark atmospheric data. Ensuring accuracy and integrity of ARM data is vital, to achieve this, Data Quality Office (DQO) implemented customized quality control tests tailored each variable, guidance from instrument mentors. These are designed pinpoint common issues, such as exceeding valid ranges or persisting little change extended periods, offers...
Abstract This study derives polarimetric radar vertical profiles and microphysical retrievals for 25 Synoptic Snow (SS) 23 Lake Effect (LES) cases using the Range‐Defined Quasi‐Vertical Profiles (RD‐QVP), Columnar Vertical (CVP), Process‐oriented (POVP) methods. For all profile techniques, SS exhibit a near‐linear increase in reflectivity from −30 to 0°C whereas Z DR K dp locally peak dendritic growth layer. LES universally negative , rather high negligible near‐unity ρ hv . Ground...
Four kinds of C58-based carbon solids and some their physical properties are predicted by the first principles calculations. These display different electronic structures, due to space symmetries connecting patterns. Among these solids, most stable one with P3m1 group displays semiconducting properties, a direct band gap about 0.12 eV, being consistent solid C58 films achieved in experiment. Interestingly, this exhibits semiconducting-metallic phase transition under applied isotropic strain....
Abstract. Severe regional haze events, which are characterized by exceedingly high levels of fine particulate matter (PM), occur frequently in many developing countries (such as China and India), with profound implications for human health, weather, climate. The occurrence the extremes involves a complex interplay between primary emissions, secondary formation, conducive meteorological conditions, relative contributions various processes remains unclear. Here we investigated severe episodes...