A5021661802- Air Quality Monitoring and Forecasting
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Aeolian processes and effects
- Cryospheric studies and observations
- Environmental Justice and Health Disparities
- Toxic Organic Pollutants Impact
- Environmental Changes in China
- Atmospheric Ozone and Climate
- Municipal Solid Waste Management
- Atmospheric and Environmental Gas Dynamics
- Precipitation Measurement and Analysis
- Flood Risk Assessment and Management
- Vehicle emissions and performance
- COVID-19 impact on air quality
- Tropical and Extratropical Cyclones Research
- Healthcare and Environmental Waste Management
Aerodyne Research
2023
Drexel University
2017-2022
Johns Hopkins University
2021
Abstract. The Kathmandu Valley in Nepal is a bowl-shaped urban basin that experiences severe air pollution poses health risks to its 3.5 million inhabitants. As part of the Ambient Monitoring and Source Testing Experiment (NAMaSTE), ambient quality was investigated from 11 24 April 2015, during pre-monsoon season. concentrations fine coarse particulate matter (PM2.5 PM10, respectively), online PM1, inorganic trace gases (NH3, HNO3, SO2, HCl), carbon-containing (CO2, CO, CH4, 93 non-methane...
Abstract The demand for effective methods to augment precipitation over arid regions of India has been increasing the past several decades as changing climate brings warmer average temperatures. In fourth phase Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX IV), a scientific investigation was conducted rain-shadow region Western Ghats mountains in India. primary objective investigate efficacy hygroscopic seeding convective clouds develop cloud protocol. CAIPEEX...
Exposures to metals from industrial emissions can pose important health risks. The Chester-Trainer-Marcus Hook area of southeastern Pennsylvania is home multiple petrochemical plants, a refinery, and waste incinerator, most abutting socio-economically disadvantaged residential communities. Existing information on fenceline community exposures based monitoring data with low temporal spatial resolution EPA models that incorporate industry self-reporting. During 3 week sampling campaign in...
The Marcellus Shale is a rapidly developing unconventional natural gas resource found in part of the Appalachian region. Air quality and climate concerns have been raised regarding development resources. Two ground-based mobile measurement campaigns were conducted to assess impact on local scale atmospheric background concentrations air pollution relevant pollutants Pennsylvania. first campaign took place Northeastern Southwestern PA summer 2012. Compounds monitored included methane (CH4),...
The Indo-Gangetic Plains (IGP) experience high levels of airborne particulate matter (PM), especially during the dry season. Contributing to PM are natural and anthropogenic emissions atmospheric transformation gases form particles. Regional smog events occur frequently wintertime provide an medium for aerosol processing. Here, we investigate chemical composition sources at a representative site in northern IGP second Nepal Ambient Monitoring Source Testing Experiment (NAMaSTE 2). In...
The Kathmandu Valley in Nepal experiences poor air quality, especially the dry winter season. In this study, we investigated concentration, chemical composition, and sources of fine coarse particulate matter (PM
The Kathmandu Valley in Nepal suffers from unhealthy air quality, with mean pre-monsoon submicron particulate matter concentration (PM 1 ) of 40 μg m −3 and daily peaks over 75 .
The Kathmandu valley experiences an average wintertime PM
Abstract. Cloud seeding experiments for modifying clouds and precipitation have been underway nearly a century; yet practically all the attempts to link enhancement or suppression presence of materials within remain elusive. In 2019, Cloud–Aerosol Interaction Precipitation Enhancement Experiment (CAIPEEX) investigated residuals cloud hydrometeors in seeded non-seeded with an airborne mini aerosol mass spectrometer (mAMS). The mAMS was utilized conjunction counterflow virtual impactor (CVI)...
Abstract. The Kathmandu Valley in Nepal is a bowl-shaped urban basin that experiences severe air pollution poses health risks to its 3.5 million inhabitants. As part of the Ambient Monitoring and Source Testing Experiment (NAMaSTE), ambient quality was investigated from 11 24 April 2015, during pre-monsoon season. concentrations fine coarse particulate matter (PM2.5 PM10, respectively), online PM1, inorganic trace gases (NH3, HNO3, SO2, HCl), carbon-containing (CO2, CO, CH4, 85 non-methane...
Long-term measurements of the composition and mass concentration particulate matter (PM) are essential for source apportionment, epidemiological studies, air quality trends. Over past ten years, Aerosol Chemical Speciation Monitor (ACSM) has been widely used long-term, in situ, high time resolution measurements. However, to date there limited with these instruments Africa South/Southeast Asia. The that have made regions suggest presence varied complex sources. Current ACSMs unit (UMR), which...
Abstract. Cloud seeding experiments for modifying cloud and precipitation have been underway nearly a century; yet practically all the attempts to link enhancement or suppression presence of materials remained inclusive. In 2019, Cloud-Aerosol Interaction Precipitation Enhancement Experiment (CAIPEEX) implemented novel method detect seeded clouds during its operations in Solapur, India. this experiment, residuals hydrometeors non-seeded were analyzed with an airborne mini-Aerosol Mass...