A5077980034- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Meteorological Phenomena and Simulations
- Plant responses to elevated CO2
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Spectroscopy and Laser Applications
- Atmospheric aerosols and clouds
- Precipitation Measurement and Analysis
- Climate variability and models
- Radiation Dose and Imaging
- Water Quality and Resources Studies
- Climate Change and Health Impacts
- Soil Moisture and Remote Sensing
- Underwater Acoustics Research
- Seismic Waves and Analysis
- Planetary Science and Exploration
- Optical Imaging and Spectroscopy Techniques
- Vehicle emissions and performance
- Atomic and Subatomic Physics Research
- Underwater Vehicles and Communication Systems
- Aerospace Engineering and Energy Systems
Goddard Space Flight Center
2018-2024
University of Maryland, College Park
2024
Earth Resources Technology (United States)
2022-2023
The Eden Rivers Trust
2023
University of Houston
2014-2022
Universities Space Research Association
2018-2022
Pusan National University
2019
Drought conditions affect ozone air quality, potentially altering multiple terms in the O3 mass balance equation. Here, we present a multiyear observational analysis using data collected before, during, and after record-breaking California drought (2011–2015) at O3-polluted locations of Fresno Bakersfield near Sierra Nevada foothills. We separately assess influences on chemical production (PO3) from concentration. show that isoprene concentrations, which are source O3-forming organic...
Abstract. Formaldehyde (HCHO) in the atmosphere is an intermediate product from oxidation of methane and non-methane volatile organic compounds. In remote marine regions, HCHO variability closely related to atmospheric capacity, modeled these regions usually added as a global satellite background. Thus, it important understand validate levels over oceans. Here we intercompare three retrievals total columns Ozone Monitoring Instrument Smithsonian Astrophysical Observatory (OMI SAO (v004))...
In coastal environments like the Chesapeake Bay, presence of sea/bay breeze circulation can contribute to poor air quality and makes modeling meteorological chemical impacts in forecast models a challenge. The Ozone Water-Land Environmental Transition Study 2 field campaign aimed better quantify mechanisms affecting surface, profile, columnar trace gas amounts between land water. Using HYSPLIT back trajectory modeling, variability Pandora NO2 surface O3 was quantified. Clustered trajectories...
We present a comprehensive sensitivity analysis and geophysical retrieval product demonstration to assess the enhanced information content in atmospheric temperature water vapor, harnessed hyperspectral microwave measurements. A particular focus of this study is devoted quantifying comparing impact on performance resulting from novel spectral bands thermal spectrum, by means data addition denial trade studies. Various configurations are assessed, each reflecting specific technology solutions...
Abstract. A novel technique has been developed to measure sulfur dioxide (SO2) using a modification of the existing electrochemical concentration cell (ECC) ozonesonde technology. The current sonde-based method SO2 (i.e., dual-sonde approach) involves launching two ozonesondes together, with one sondes having filter remove at inlet. profile is determined by taking difference between measurements from instruments. works well in typical tropospheric conditions when [O3]>[SO2] but saturates...
In Houston, Texas, nitrogen dioxide (NO
Abstract This study analyzes wind patterns in the Dallas–Fort Worth (DFW) area to gain a clearer understanding of meteorological that have historically led ozone exceedances this region. Using clustering algorithm called “self-organizing maps,” we analyzed five notable characteristic regional occurred between April and October 2000–14. A regional-scale high pressure system, cluster 2, produced weak southeast winds over DFW accounted for 35.2% exceedances. Clusters 1 5, characterized by...
Abstract The Satellite Coastal and Oceanic Atmospheric Pollution Experiment (SCOAPE) cruise in the Gulf of Mexico was conducted May 2019 by NASA Bureau Ocean Energy Management to determine feasibility using satellite data measure air quality a region concentrated oil natural gas (ONG) operations. SCOAPE addressed both technological scientific issues related measuring NO 2 columns over outer continental shelf. Featured were nitrogen dioxide (NO ) instruments (Pandora, Teledyne API analyzer)...
Abstract. Analysis of formaldehyde measurements by the Pandora spectrometer systems between 2016 and 2019 suggested that there was a temperature-dependent process inside head sensor emitted formaldehyde. Some parts in were manufactured from thermal plastic polyoxymethylene homopolymer (E.I. Du Pont de Nemour & Co., USA; POM-H Delrin®) responsible for production. Laboratory analysis four sensors showed internal production had exponential temperature dependence with damping coefficient...
Abstract. Ozone (O3) air pollution in Sequoia National Park (SNP) is among the worst of any national park US. SNP located on western slope Sierra Nevada Mountains downwind San Joaquin Valley (SJV), which home to numerous cities ranked top 10 most O3-polluted Here, we investigate influence emission controls SJV O3 concentrations over a 12-year time period (2001–2012). We show that export nitrogen oxides (NOx) from has played larger role driving high than transport O3. As result, been more...
Abstract. Analysis of formaldehyde measurements by the Pandora spectrometer systems between 2016 and 2019 suggested that there was a temperature dependent process inside head sensor emitted formaldehyde. Some parts in were manufactured from thermal plastic polyoxymethylene homopolimer (E.I. Du Pont de Nemour & Co., USA: POM-H Delrin®) responsible for production. Laboratory analysis four sensors showed internal production had exponential dependence with damping coefficient 0.0911 ±...
We have developed a process for evaluating future satellite-based hyperspectral microwave sensor designs using deep neural networks (DNN). Our approach combines sophisticated simulated data product with hierarchical network capable of comparing the relative performance variety different sounder configurations. These configurations include both spectral band coverage and resolution which allows thorough investigation solution space. The between these as tested on prediction planetary boundary...
Abstract. Sequoia National Park (SNP) experiences the worst ozone (O3) pollution of any national park in U.S. SNP is located on western slope Sierra Nevada Mountains, downwind San Joaquin Valley (SJV), which home to numerous cities ranked among most O3-polluted Here, we investigate influence emission controls directly upwind SJV city Visalia O3 concentrations over a 12-yr time period (2001–2012). We show that export nitrogen oxides (NOx) from plays larger role driving high than does...
We present a comprehensive Earth Planetary Boundary Layer temperature and water vapor retrieval improvement demonstration by the use of hyperspectral microwave measurements. Our results indicate that sampling in oxygen sounding lines alone provides significant improvements lower free tropospheric thermodynamic fields (up to 40%), when compared against program record (i.e., Advanced Technology Microwave Sounder, ATMS). experiments also demonstrate essential role played extending coverage so...