A5040995138- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Lightning and Electromagnetic Phenomena
- Atmospheric Ozone and Climate
- Aeolian processes and effects
- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
- Fire effects on ecosystems
- Earthquake Detection and Analysis
- Vehicle emissions and performance
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Air Quality Monitoring and Forecasting
- Coal Properties and Utilization
- Remote Sensing in Agriculture
- Aviation Industry Analysis and Trends
- BIM and Construction Integration
- Solar Radiation and Photovoltaics
- Granular flow and fluidized beds
- Calibration and Measurement Techniques
- Thermal Analysis in Power Transmission
- High-Voltage Power Transmission Systems
- Nuclear and radioactivity studies
- Wind and Air Flow Studies
Texas A&M University
2016-2025
Mitchell Institute
2023-2025
University of Arizona
2019-2020
University of North Dakota
2010-2014
Brown University
2003
Abstract. The seasonal and spatial variations of vertical distribution optical properties aerosols over China are studied using long-term satellite observations from the Cloud–Aerosol Lidar with Orthogonal Polarization (CALIOP) ground-based lidar Aerosol Robotic Network (AERONET) data. CALIOP products validated measurements at Semi-Arid Climate Environment Observatory Lanzhou University (SACOL). Taklamakan Desert Tibetan Plateau regions exhibit highest depolarization color ratios because...
Abstract. Over the eastern North Atlantic (ENA) ocean, a total of 20 non-precipitating single-layer marine boundary layer (MBL) stratus and stratocumulus cloud cases are selected to investigate impacts environmental variables on aerosol–cloud interaction (ACIr) using ground-based measurements from Department Energy Atmospheric Radiation Measurement (ARM) facility at ENA site during 2016–2018. The ACIr represents relative change in droplet effective radius re with respect condensation nuclei...
Abstract. Vertical profiles of aerosols are inadequately observed and poorly represented in climate models, contributing to the current large uncertainty associated with aerosol–cloud interactions. The US Department Energy (DOE) Atmospheric Radiation Measurement (ARM) Aerosol Cloud Experiments Eastern North Atlantic (ACE-ENA) aircraft field campaign near Azores islands provided ample observations vertical distributions aerosol cloud properties. Here we utilize situ measurements from ACE-ENA...
Abstract A multiplatform data set from the Clouds, Aerosol, and Precipitation in Marine Boundary Layer (MBL) Graciosa, Azores, 2009–2010 field campaign was used to investigate how continental aerosols can influence MBL cloud condensation nuclei (CCN) number concentration ( N CCN ). The seasonal variations of aerosol properties have shown that winter early spring months had highest mean surface wind speed (> 5 m s −1 ) greatest contribution sea salt optical depth (AOD), while fine mode...
Abstract. Asian aerosols are among the most complex yet widely studied components of atmosphere not only due to their seasonal variability but also effects on climate change. Four Aerosol Robotic Network (AERONET) sites have been selected represent aerosol properties dominated by pollution (Taihu), mixed particle types (Xianghe), desert-urban (SACOL), and biomass (Mukdahan) in East Asia during 2001–2010 period. The volume size distribution, optical depth (τ τabs), Ångström exponent (α αabs),...
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 Wildfires are extreme events associated with weather, climate, and environment have been increasing globally in frequency, burn season length, burned area. It is of great interest to understand the impacts wildfires on severe convective storms through releasing heat aerosols into atmosphere. We developed a model capability that can account for impact sensible fluxes from thermodynamics computationally efficient. The pyrocumulonimbus clouds Texas Mallard Fire 11–12 May 2018 well...
Abstract. The aerosol indirect effect on cloud microphysical and radiative properties is one of the largest uncertainties in climate simulations. In order to investigate aerosol–cloud interactions, a total 16 low-level stratus cases under daytime coupled boundary-layer conditions are selected over southern Great Plains (SGP) region United States. physicochemical aerosols their impacts examined using data collected from Department Energy Atmospheric Radiation Measurement (ARM) facility at SGP...
Abstract Convective clouds play an important role in the Earth’s climate system and are a known source of extreme weather. Gaps our understanding convective vertical motions, microphysics, precipitation across full range aerosol meteorological regimes continue to limit ability predict occurrence intensity these cloud systems. Towards improving predictability, National Science Foundation (NSF) sponsored large field experiment entitled “Experiment Sea Breeze Convection, Aerosols,...
Abstract The destructive power of tropical cyclones is driven by latent heat released from water condensation and inevitably linked to the abundance aerosols as cloud nuclei. However, aerosol effects are unaccounted for in most operational hurricane forecast models. We combined multisource measurements cloud‐resolving model simulations show fundamentally altered microphysical thermodynamic processes anthropogenic during Hurricane Harvey. Our observational analyses reveal intense lightning...
Asian dust events occur frequently during the boreal spring season. Their optical properties have been analyzed by using a combination of source region (ground‐based and satellite) remote Pacific Ocean (aircraft) measurements Intercontinental Chemical Transport Experiment‐Phase B (INTEX‐B) field campaign which lasted from 7 April to 15 May 2006. A strong event originating Gobi Desert passing over Xianghe surface site on 17 2006 has extensively analyzed. The averaged aerosol depth (AOD)...
© 2022 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).CORRESPONDING AUTHOR: Randall S. Cerveny, cerveny@asu.edu
Abstract Changes in anthropogenic aerosol loading affect cloud albedo and the Earth's radiative balance with a low level of scientific understanding. Aerosol‐cloud interaction its effects on climate are mainly evaluated using passive observations global scale. Here this study estimated intrinsic response clouds to aerosols by combining active satellite from July 2006 February 2011 South Asia. We evaluate average forcing aerosol‐cloud for warm liquid as 0.63 ± 0.19, −0.34 0.40, 1.11 0.08 W/m...
Abstract. The aerosol–cloud–precipitation interactions within the cloud-topped marine boundary layer (MBL) are examined using aircraft in situ measurements from Aerosol and Cloud Experiments Eastern North Atlantic (ACE-ENA) Southern Ocean Clouds, Radiation, Transport Experimental Study (SOCRATES) field campaigns. SOCRATES clouds exhibit a larger number concentration smaller cloud droplet effective radius (148.3 cm−3 8.0 µm) compared to ACE-ENA summertime (89.4 9.0 wintertime (70.6 9.8 µm)....
Abstract Properties of 7488 thunderstorms are summarized for June–September 2022 during the Tracking Aerosol Convection Interactions Experiment (TRACER) field campaign Houston, Texas, using polarimetric weather radar and VHF 3D Lightning Mapping Array data. Automated tracking storms linked each instrument’s measurements to a data-defined, time-evolving storm footprint. Within storm, depth magnitude episodic columns differential reflectivity specific phase quantified prevalence updrafts that...
The automatic detection of aerosol- and cloud-layer boundary (base top) is important in atmospheric lidar data processing, because the information not only useful for environment climate studies, but can also be used as input further processing. Previous methods have demonstrated limitations defining base top, window-size setting, neglected in-layer attenuation. To overcome these limitations, we present a new layer scheme up-looking lidars based on linear segmentation with reasonable...
Abstract Positive polarity lightning strokes can be useful indicators of thunderstorm behavior. A combination National Lightning Detection Network and Next Generation Radar retrievals is used to analyze the anomalous positive cloud‐to‐ground (CG) behavior a rare, late summer severe weather event that occurred on 26–27 August 2007 in Northern Great Plains region United States southern Canada. Seven discrete supercells (SC1–SC7) exhibiting frequent intense were responsible for numerous reports...
Asian dust events are generated by deep convection from strong low pressure systems that form over mineral source regions. This study compares the optical properties of two winter (December 2007) and spring (March 2010) seasons using AERONET retrieved parameters three sites along event path: SACOL (dust region), Xianghe (downwind mixed aerosol Taihu pollution region). The include: effective radius, depth (t), absorptive (tabs), their respective wavelength dependences or Angstrom exponents (a...
Light scattering by kaolinite dust samples at 532 nm is studied using a newly developed laboratory apparatus. During the experiments, are suspended in water, aerosolized nebulizer, and then injected into zone, with or without going through diffusion drier, to generate either dried particles water droplets inclusions. The light source dual wavelength (532 1064 nm) diode-pumped solid state laser. scattered an ensemble of collected charge-coupled device (CCD) camera, which mounted on rotating...
U.S. national research priorities include reducing the disruption caused by sonic booms, which hindered economic viability of supersonic aircraft in decades past. However, shock waves are unavoidable during flight; and exposure people, animals, structures to these on ground cannot be eliminated entirely. It is herein shown that changing atmospheric conditions, gusts, heights above can result any acceptably quiet at specific conditions becoming uncomfortably loud other flight conditions....
Abstract Extreme lightning activity (∼300,000 flashes) was observed by the Houston Lightning Mapping Array (HLMA) network during Tropical Storm Harvey on August 26, 2017–August 27, 2017. There an overall weak correlation between flash and precipitation rates ( R = 0.14; p ∼ 0.17) likely due to feeder bands transitioning deep shallow convection. The peak rate (14.2 mm hr −1 ) lagged (∼18,000 flashes [30 min] 7 h. Adjusting for lag, increased 0.71 < 0.01) indicating a relationship uptick in...
Abstract. The vertical distribution and optical properties of aerosols over China are studied using long-term satellite observations from the Cloud–Aerosol Lidar with Orthogonal Polarization (CALIOP) ground-based lidar Aerosol Robotic Network (AERONET) data. CALIOP products validated measurements at Semi-Arid Climate Environment Observatory Lanzhou University (SACOL). Taklimakan Desert Tibetan Plateau regions exhibit highest depolarization color ratios because natural dust origin, whereas...