A5012945271- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- COVID-19 impact on air quality
- Mineral Processing and Grinding
- Meteorological Phenomena and Simulations
- Mining Techniques and Economics
- Belt Conveyor Systems Engineering
- Atmospheric aerosols and clouds
- Hydrocarbon exploration and reservoir analysis
- Geophysics and Gravity Measurements
- Tunneling and Rock Mechanics
- CO2 Sequestration and Geologic Interactions
- Spectroscopy and Laser Applications
- Drilling and Well Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Water Quality and Resources Studies
- Distributed and Parallel Computing Systems
- Climate variability and models
- Wind and Air Flow Studies
- Marine and coastal ecosystems
University of Iowa
2014-2022
University Corporation for Atmospheric Research
2020-2022
Abstract Ozone concentrations in excess of health‐based standards occur along the coastline Lake Michigan. A complex pattern ozone precursor emissions interfaces with a meteorological environment, presenting challenge for air quality management and simulation. Precursors are transported into shallow, stable boundary layer over lake. This is followed by formation transport back onshore through combination synoptic lake breeze winds. In this study, we use measurements during Michigan Study...
The Lake Michigan Ozone Study 2017 (LMOS 2017) was a collaborative multiagency field study targeting ozone chemistry, meteorology, and air quality observations in the southern area. primary objective of LMOS to provide measurements improve modeling complex meteorological chemical environment region. science questions included spatiotemporal assessment nitrogen oxides (NO x = NO + NO2) volatile organic compounds (VOC) emission sources their influence on episodes; role lake breezes;...
Abstract High concentrations of ozone along the coastline Lake Michigan are a persistent air quality management challenge. Complementing observations during 2017 Ozone Study (LMOS 2017), WRF‐Chem modeling was used to quantify sensitivity modeled (O 3 ) anthropogenic nitrogen oxides (NO x and volatile organic compound (VOC) emissions, including changes in chemical product (VCP). The daily maximum 8 hr average (MDA8) over high region decreased by 2.7 ppb with exclusion VCP from inventory,...
Research has recognised operators' skill as important factors affecting performance and energy efficiency of mining equipment. Modern monitoring tools generate large, highly variable, and, often, skewed data sets. Well-conceived statistical tests should be used to assess the effect operators on in such situations. However, many cases literature, choice evaluate operator effects not been systematic rigorous underlying assumptions these have examined before their use. This work provides a...
Abstract. Recent increases in natural gas (NG) production through hydraulic fracturing have called the climate benefit of switching from coal-fired to gas-fired power plants into question. Higher than expected levels methane, non-methane hydrocarbons (NMHC), and NOx been observed areas close oil NG operation facilities. Large uncertainties emission inventories reduce confidence level impact assessment such activities on regional air quality climate, as well development effective mitigation...
We highlight the contribution of inter-annual meteorology and emissions (dust, biogenic, biomass burning) COVID-19 lockdown to changes in aerosols ozone, provide a detailed ozone chemistry analysis northern India.
The Joint Effort for Data assimilation Integration (JEDI), is an innovative data system Earth prediction, spearheaded by the Center Satellite Assimilation (JCSDA) and slated implementation in major operational modeling systems across globe coming years. Funded as inter-agency development NOAA, NASA, U.S. Navy Air Force, with contributions from UK Met Office, JEDI must operate on a wide range of computing platforms. recent move towards cloud puts portability, adaptability performance systems,...
Abstract. Recent increases in the Natural Gas (NG) production through hydraulic fracturing have called into question climate benefit of switching from coal-fired to natural gas-fired power plants. Higher than expected levels methane, Non-Methane Hydrocarbons (NMHC), and NOx been observed areas close oil NG operation facilities. Large uncertainties emission inventories reduce confidence level impact assessment such activities on regional air quality climate, as well development effective...
India implemented stay-at-home order (i.e. lockdown) on 24 March 2020 to decrease the spread of novel COVID-19, which reduced air pollutant emissions in different sectors. The Weather Research and Forecasting model with Chemistry (WRF-Chem) was used study changes pollutants during lockdown period compared similar 2019. We found that both meteorology contributed daytime PM2.5 (-6% -11%, respectively) ozone -8%, reduction averaged April Indo-Gangetic Plain. However, concentration response...
A global aerosol data assimilation (DA) system based on the ensemble-variational (EnVar) application in Joint Efforts for Data Integration (JEDI) was recently developed Global Ensemble Forecast System - Aerosols (GEFS-Aerosols) operations at NOAA/NWS/NCEP. The optical depth (AOD) retrievals 550 nm are assimilated to improve GEFS-Aerosols initial conditions and its subsequent forecasts. To account emission uncertainty ensemble forecasts thus enhance AOD assimilation, a...