A5086093767- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- COVID-19 impact on air quality
- Climate Change and Health Impacts
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Medical Imaging and Pathology Studies
- Noise Effects and Management
- Atmospheric aerosols and clouds
- Environmental Justice and Health Disparities
- Urban Transport and Accessibility
- Global Health Care Issues
- Data-Driven Disease Surveillance
- Energy and Environment Impacts
- Impact of Light on Environment and Health
- Shoulder Injury and Treatment
- COVID-19 epidemiological studies
- Enhanced Oil Recovery Techniques
- Carbon Dioxide Capture Technologies
- Oil, Gas, and Environmental Issues
- Environmental Policies and Emissions
- Disaster Response and Management
- Mercury impact and mitigation studies
George Washington University
2019-2025
Milken Institute
2020-2025
University of Wisconsin–Madison
2024
University of California, San Francisco
2023-2024
Academia Nacional de Medicina
2023
Secretaria de Ciência, Tecnologia e Inovação
2023
Institute for Health Metrics and Evaluation
2022
University of Washington
2022
University of British Columbia
2022
Argonne National Laboratory
2017-2022
TROPOMI satellite data show substantial drops in nitrogen dioxide (NO2) during COVID-19 physical distancing. To attribute NO2 changes to NO x emissions over short timescales, one must account for meteorology. We find that meteorological patterns were especially favorable low much of the United States spring 2020, complicating comparisons with 2019. Meteorological variations between years can cause column differences ~15% monthly timescales. After accounting solar angle and considerations, we...
The TROPOspheric Monitoring Instrument (TROPOMI) is used to derive top-down NOX emissions for two large power plants and three megacities in North America. We first re-process the vertical column NO2 with an improved air mass factor correct a known systematic low bias operational retrieval near urban centers. For plants, agree within 10% of reported by plants. then rates New York City, Chicago, Toronto, compare them projected bottom-up inventories. In this analysis 2018 emissions, we find...
Observing the spatial heterogeneities of NO2 air pollution is an important first step in quantifying NOX emissions and exposures. This study investigates capabilities Tropospheric Monitoring Instrument (TROPOMI) observing temporal patterns continental United States. The unprecedented sensitivity sensor can differentiate fine-scale urban areas, such as related to airport/shipping operations high traffic, relatively small emission sources rural power plants mining operations. We then examine...
The COVID-19 global pandemic and associated government lockdowns dramatically altered human activity, providing a window into how changes in individual behavior, enacted en masse, impact atmospheric composition. resulting reductions anthropogenic activity represent an unprecedented event that yields glimpse future where emissions to the atmosphere are reduced. Furthermore, abrupt reduction during lockdown periods led clearly observable composition, which provide direct insight feedbacks...
Ambient nitrogen dioxide (NO2) and fine particulate matter with aerodynamic diameter ≤2.5μm (PM2.5) threaten public health in the US, systemic racism has led to modern-day disparities distribution associated impacts of these pollutants.
Abstract. Regulatory air quality models, such as the Community Multiscale Air Quality model (CMAQ), are used by federal and state agencies to guide policy decisions that determine how best achieve adherence with National Ambient Standards for surface ozone. We use observations of ozone its important precursor NO2 test representation photochemistry emission precursors within CMAQ. Observations tropospheric column from Ozone Monitoring Instrument (OMI), retrieved two independent groups, show...
Abstract. In this work, we investigate the NOx emissions inventory in Seoul, South Korea, using a regional ozone monitoring instrument (OMI) NO2 product derived from standard NASA product. We first develop OMI by recalculating air mass factors high-resolution (4 km × 4 km) WRF-Chem model simulation, which better captures profile shapes urban regions. then apply model-derived spatial averaging kernel to further downscale retrieval and account for subpixel variability. These two modifications...
Significance We leverage the unparalleled changes in human activity during COVID-19 and unmatched capabilities of TROPOspheric Monitoring Instrument to understand how lockdowns impact ambient nitrogen dioxide ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi mathvariant="normal">N</mml:mi> mathvariant="normal">O</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:math> ) pollution disparities United States. The least White...
Abstract. We present a method to infer CO2 emissions from individual power plants based on satellite observations of co-emitted nitrogen dioxide (NO2), which could serve as complementary verification bottom-up inventories or be used supplement these inventories. demonstrate its utility eight large and isolated US plants, where accurate stack emission estimates both gases are available for comparison. In the first step our methodology, we oxides (NOx) using Ozone Monitoring Instrument (OMI)...
BackgroundCombustion-related nitrogen dioxide (NO2) air pollution is associated with paediatric asthma incidence. We aimed to estimate global surface NO2 concentrations consistent the Global Burden of Disease study for 1990–2019 at a 1 km resolution, and attributable incidence trends in 13 189 cities from 2000 2019.MethodsWe scaled an existing annual average concentration dataset 2010–12 land use regression model (based on 5220 monitors 58 countries variables) other years using column...
Abstract. The Tropospheric Monitoring Instrument (TROPOMI) on the Sentinel-5 Precursor (S5P) satellite is a valuable source of information to monitor NOx emissions that adversely affect air quality. We conduct series experiments using 4×4 km2 Comprehensive Air Quality Model with Extensions (CAMx) simulation during April–September 2019 in eastern Texas evaluate multiple challenges arise from reconciling model simulations TROPOMI. find an increase NO2 (+17 % urban areas) when transitioning...
Abstract. This work presents a new high-resolution NO2 dataset derived from the NASA Ozone Monitoring Instrument (OMI) version 3.0 retrieval that can be used to estimate surface-level concentrations. The standard product uses vertical profile shape factors 1.25° × 1° (∼ 110 km km) resolution Global Model Initiative (GMI) model simulation calculate air mass factors, critical value determine observed tropospheric columns. To better we use (1.33 1.33 Community Multi-scale Air Quality (CMAQ)...
Abstract Meteorological and air-quality model simulations are analyzed alongside observations to investigate the role of Chesapeake Bay breeze on surface air quality, pollutant transport, boundary layer venting. A case study was conducted understand why a particular day only one during an 11-day ship-based field campaign which ozone not elevated in concentration over relative closest upwind site high concentrations were observed aloft by situ aircraft observations. Results show that...
Introduction: The World Health Organization (WHO) recently revised its health guidelines for Nitrogen dioxide (NO 2 ) air pollution, reducing the annual mean NO level to 10 μg/m 3 (5.3 ppb) and 24-h 25 (13.3 ppb). is a pollutant of global concern, but it also criteria that varies spatiotemporally at fine resolutions due relatively short lifetime (~hours). Current models have limited ability capture both temporal spatial variation none are available with coverage. Land use regression (LUR)...
An impressive number of COVID-19 data catalogs exist. However, none are fully optimized for science applications. Inconsistent naming and conventions, uneven quality control, lack alignment between disease potential predictors pose barriers to robust modeling analysis. To address this gap, we generated a unified dataset that integrates implements checks the from numerous leading sources epidemiological environmental data. We use globally consistent hierarchy administrative units facilitate...
Surface ozone (O3) was analyzed to investigate the role of bay breeze on air quality at two locations in Edgewood, Maryland (lat: 39.4°, lon: −76.3°) for month July 2011. Measurements were taken as part first year NASA's "Deriving Information Conditions from Column and Vertically Resolved Observations Relevant Air Quality" (DISCOVER-AQ) Earth Venture campaign Geostationary Coastal Pollution Events Chesapeake Bay Oceanographic with DISCOVER-AQ (Geo-CAPE CBODAQ). Geo-CAPE CBODAQ complements by...
A Comprehensive Air-Quality Model with Extensions (CAMx) version 6.10 simulation was assessed through comparison data acquired during NASA's 2011 DISCOVER-AQ Maryland field campaign. Comparisons for the baseline (CB05 chemistry, EPA National Emissions Inventory) show a model overestimate of NOy by +86.2% and an underestimate HCHO -28.3%. We present new framework (CB6r2 MEGAN v2.1 biogenic emissions, 50% reduction in mobile NOx, enhanced representation isoprene nitrates) that better matches...
Abstract. KORUS-AQ was an international cooperative air quality field study in South Korea that measured local and remote sources of pollution affecting the Korean Peninsula during May–June 2016. Some largest aerosol mass concentrations were a Chinese haze transport event (24 May). Air forecasts using WRF-Chem model with optical depth (AOD) data assimilation captured AOD this episode but overpredicted surface particulate matter Korea, especially PM2.5, often by factor 2 or larger. Analysis...
Satellite data show substantial drops in nitrogen dioxide (NO2) during COVID-19 physical distancing. To attribute NO2 changes to NOx emissions over short timescales, one must account for meteorological effects. We find that patterns were especially favorable low much of the U.S. spring 2020, complicating comparisons with 2019. Meteorological variations between years can cause column differences ~15% monthly timescales. After accounting sun angle and considerations, we calculate ranged 9.2 –...
Abstract Emission inventory development for air pollutants, by compiling records from individual emission sources, takes many years and involves extensive multi-national effort. A complementary method to estimate pollution emissions is in the use of satellite remote sensing. In this study, NO 2 observations Ozone Monitoring Instrument are combined with re-analysis meteorology urban nitrogen oxide (NO X ) 80 global cities between 2005 2019. The average downward trend satellite-derived was...
The COVID-19 pandemic created an extreme natural experiment in which sudden changes human behavior and economic activity resulted significant declines nitrogen oxide (NO x ) emissions, immediately after strict lockdowns were imposed. Here we examined the impact of multiple waves response phases on dioxide (NO2) dynamics role meteorology shaping relative contributions from different emission sectors to NO2 pollution post-pandemic New York City. Long term (> 3.5 years), high frequency...