A5048340563- Meteorological Phenomena and Simulations
- Radioactive contamination and transfer
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Climate variability and models
- Allergic Rhinitis and Sensitization
- Nuclear and radioactivity studies
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Plant and animal studies
- Tropical and Extratropical Cyclones Research
- Aeolian processes and effects
- Plant Surface Properties and Treatments
- Wind and Air Flow Studies
- Plant Water Relations and Carbon Dynamics
- Insect and Arachnid Ecology and Behavior
- Fire dynamics and safety research
- Ecosystem dynamics and resilience
- Groundwater flow and contamination studies
- Graphite, nuclear technology, radiation studies
- Plant Reproductive Biology
- Radioactivity and Radon Measurements
- Ocean Waves and Remote Sensing
- Plant responses to elevated CO2
- Crop Yield and Soil Fertility
Savannah River National Laboratory
2016-2025
University of South Carolina Aiken
2019
Iowa State University
2006-2012
To address the growing threat of global antimicrobial resistance, a one-health approach is needed to understand complex socioecological cycling antibiotic resistance genes. In this study, metagenomics using DNA shotgun sequencing, metagenome assembly, and gene (ARG) annotation was used examine seasonal patterns in abundance mobile colistin (mcr) variants bioaerosols liquid sludge three wastewater treatment plants (WWTPs). ARGs represented 0.2–0.8 0.1–0.2% bioaerosol metagenomes,...
ABSTRACT We have developed a mathematical model to predict the diurnal pattern of maize ( Zea mays L.) pollen shed on basis local meteorological conditions. Our goal is improve simulations dispersion that typically released at constant rate in contrast with measurements show variation shed. Measurements coupling and variables were made during controlled experiments 2004 field experiment examine influence conditions From these data, was as function vapor pressure deficit, solar radiation,...
Daily weather types (WTs) over the Southeast United States have been analyzed using 850 hPa winds from reanalysis data March to October of 1979–2019. Six WTs were obtained. 1–3 represent mid-latitude synoptic systems propagating eastward. WT4 is a summer-type pattern predominantly occurring in June–August, with center North Atlantic Subtropical High (NASH) along Gulf coast southern States. WT5 most frequent August middle October, NASH pushed further north and southerly northern Great Plains....
Sea breezes have been observed to move inland over 100 km. These airmasses can be markedly different from regional airmasses, creating a shallow layer with differences in humidity, wind, temperature and aerosol characteristics. To understand their influence on boundary cloud development subsequent days, we identify frequency We visually identified sea breeze fronts radar passing the Savannah River Site (SRS) between March October during 2015–2019. The SRS is ~150 km nearest coastal location;...
Sea breezes are frequently observed in the South Carolina/Georgia region of Southeastern United States (SEUS) and can reach upwards 150km inland. This is unique among places affected by sea breeze due to it being a continental location with relatively flat topography. The thermal gradient between land water environments factor introducing breeze, but its role inland extent propagation isn’t as well known. We investigate previously catalogued events at Savannah River Site (SRS) taking...
Abstract Sea breeze winds are observed at various locations worldwide, but the spatially continuous mapping of sea is rare. We have developed a scheme to map areas southeastern United States (SEUS) coast influenced by using range surface re‐analysis data identify their occurrence. Changes in wind direction and dew point temperature both used detect potential signature, which then confirmed cumuliform clouds seen satellite images or coastal fronts shown as cohesive lines radar reflectivity...
Firefighters responding to wildland fires where surface litter and vegetation contain radiological contamination will receive a dose by inhaling resuspended radioactive material in the smoke. This may increase their lifetime risk of contracting certain types cancer. Using published data, we modelled hypothetical radionuclide emissions, dispersion for 70th 97th percentile environmental conditions average high fuel loads at Savannah River Site. We predicted downwind concentration potential...
After 2 decades of irrigation with groundwater from a holding pond: OBT and <sup>14</sup>C are retained in the recent wood growth whereas HTO levels remained constant age.
ABSTRACT We combined a high‐resolution atmospheric dynamical model and Lagrangian dispersion to assess the influence of complex terrain (e.g., mountains valleys) on movement pollen from source genetically modified bentgrass ( Agrostis stolonifera L.). simulated 6 d (22–27 June 2003) reported case where gene flow in was observed at distances greater than 20 km near Madras, OR (44°44′24″ N, 121°9′30″ W). Our resolves effects local turbulence that were not considered by previous studies....
Abstract Fire plays an essential role in maintaining the structure and function of longleaf pine ecosystems. While effects fire on carbon cycle have been measured previous studies for short periods during a burn multiyear following burn, information how is influenced by such changes over span few weeks to months has yet be quantified. We analyzed high‐frequency measurements CO 2 concentration flux, as well associated micrometeorological variables, at three levels tall Aiken AmeriFlux tower...
Abstract Observed precipitation changes in the Southeast United States (SEUS) are spatially heterogeneous. Most of inland SEUS and eastern Gulf Coast become drier, East north Charleston, South Carolina, southern Florida wetter from old 30-yr period 1961–90 to recent 1991–2020. The observed climate change is examined perspective daily weather types (WTs). A k -means clustering analysis has been conducted using 850-hPa circulation for 1948–2021. obtained 10 WTs peak different seasons,...
At SRS, emergency responders use a variety of tools to detect, track, and mitigate hazardous material releases into the atmosphere. Two models currently used at SRS are Puff-Plume Lagrangian Particle Dispersion Model (LPDM), Gaussian model, respectively. A decision has been made replace LPDM with more widely-supported Hybrid Single-Particle Integrated Trajectory (HYSPLIT) model for evaluating inhalation ingestion doses following release. HYSPLIT is designed compute complex dispersion...
Abstract Sea breezes penetrate inland more than 100 km. Using 7 years of meteorological observations, we have identified 470 cases deep (>100 km) penetrating sea at the Savannah River Site between March and October (27% days) 2015–2021. We compared measurements temperature, dewpoint incoming solar radiation, cloud fraction, lightning on days breeze initiation, day after passage, all other nonsea (NSB) for these 8 months over years. Days initiation were found to lower higher greater...