A5027716265- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Vehicle emissions and performance
- COVID-19 impact on air quality
- Hydrocarbon exploration and reservoir analysis
- Energy and Environment Impacts
- Coal Properties and Utilization
- Air Quality Monitoring and Forecasting
- Oil, Gas, and Environmental Issues
- Noise Effects and Management
- Impact of Light on Environment and Health
- Climate Change and Health Impacts
- Odor and Emission Control Technologies
- Atmospheric Ozone and Climate
Morgan State University
2024-2025
Goddard Space Flight Center
2024
Milken Institute
2022-2023
George Washington University
2022-2023
University of Maryland, College Park
2017-2022
Abstract Urban areas are responsible for a substantial fraction of anthropogenic emissions greenhouse gases (GHGs) including methane (CH 4 ), with the second largest direct radiative forcing relative to carbon dioxide (CO 2 ). Quantification urban CH is important establishing GHG mitigation policies. Comparison observation‐based and inventory‐based suggests possible improvements in estimating source environments. In this study, we quantify from Baltimore‐Washington area based on mass balance...
Abstract Natural gas production in the United States has increased rapidly over past decade, along with concerns about methane (CH 4 ) fugitive emissions and its climate impacts. Quantification of CH from oil natural (O&NG) operations is important for establishing scientifically sound policies mitigating greenhouse gases. We use aircraft mass balance approach three flight experiments August September 2015 to estimate O&NG southwestern Marcellus Shale. a mean emission rate as 21.2...
We analyze airborne measurements of atmospheric CO concentration from 70 flights conducted over six years (2015–2020) using an inverse model to quantify the emissions Washington, DC, and Baltimore metropolitan areas. found that have been declining in area at a rate ≈−4.5 % a–1 since 2015 or ≈−3.1 2016. In addition, we show "Sunday" effect, with being lower, on average, than for rest week seasonal cycle is no larger 16 %. Our results also trend derived NEI agrees well observed trend, but...
Abstract Under the leadership of C40 Cities Climate Leadership Group (C40), approximately 1,100 global cities have signed to reach net-zero emissions by 2050. Accurate greenhouse gas emission calculations at city-scale become critical. This study forms a bridge between two calculation methods: 1) accounting used —the Global Protocol for Community-Scale Greenhouse Gas Emission Inventories (GPC) and 2) global-scale gridded datasets research community Database Atmospheric Research (EDGAR)...
Cities with their large, dense populations are concentrated sources of CO2 emissions to the atmosphere. Although more than 60% global fossil fuel from cities, yet we lack high-quality city-level inventories and/or independent verification datasets across majority cities. Several cities have also adopted ambitious goals reaching net-zero by 2030 or 2050. In fact, most recently at COP28, several including those in non-Annex I countries, signed up be part Coalition for High Ambition Multilevel...
Abstract Natural gas production in the U.S. has increased rapidly over past decade, along with concerns about methane (CH 4 ) leakage (total fugitive emissions), and climate impacts. Quantification of CH emissions from oil natural (O&NG) operations is important for establishing scientifically sound, cost‐effective policies mitigating greenhouse gases. We use aircraft measurements a mass balance approach three flight experiments August September 2015 to estimate O&NG southwestern...
To study emissions of CO
In recent years, the United States power sector emissions of CO2 and NOx have decreased due to declining coal increasing natural gas renewables in fuel-mix. April 2020, COVID-19 social restrictions led a decline electricity demand from commercial industrial sectors. this study, we estimate changes U.S. three factors: 1) weather, 2) fuel-mix change past five 3) restrictions. We use multivariate adaptive regression splines (MARS) model separate impacts outdoor temperature type-of-day on...
Many actions to reduce greenhouse gases (GHGs) in cities have benefits for environmental quality, public health, and equity. These local immediate “co-benefits” can include cleaner air, expanded green space, improved physical activity, reduced noise. However, progress incorporating co-benefits assessments into climate mitigation planning has been limited. Here, we capitalized on the new availability of action plans (CAPs) from dozens C40 explore stated role equity urban GHG planning....
The article, Ren, X., et al. (2017), “Methane emissions from the Marcellus Shale in southwestern Pennsylvania and northern West Virginia based on airborne measurements,” has been retracted by authors because of an error wind measurements used to calculate methane region. was discovered October 2017 upon their installation improved, differential GPS, measurement system onto aircraft this study. original led overestimate oil natural gas operations. A reanalysis with corrected winds reduced...
In recent years, the United States power sector emissions of CO2 and NOx have decreased due to declining coal increasing natural gas renewables in fuel-mix. April 2020, COVID-19 social restrictions led a decline electricity demand from commercial industrial sectors. this study, we estimate changes U.S. three factors: 1) weather, 2) fuel-mix change past five 3) restrictions. We use multivariate adaptive regression splines (MARS) model separate impacts outdoor temperature type-of-day on...