Mark Zondlo is associate professor of Civil and Environmental Engineering, and associate director of external partnerships in the Andlinger Center for Energy and the Environment, both at Princeton University. Zondlo’s research interests include atmospheric chemistry, cloud microphysics and chemistry, atmosphere-surface fluxes of nitrogen, water, and carbon, aerosol particle chemistry and dynamics, global air pollution, and laser sensor development.
The focus of Mark’s project is to identify how remote sensing measurements of ammonia (NH3) can be used to help improve air quality forecasts of PM2.5, a criteria pollutant that has proven difficult to reduce in urban regions. Ammonia is a critical trace gas precursor for PM2.5 in many areas, yet its measurements and emissions are poorly constrained. Recent advances in satellite measurements of ammonia offer new opportunities to constrain emission inventories and help to develop mitigation pathways for improved PM2.5 reduction. The specific research objectives of this project are the following:
- To validate absolute column NH3 amounts from IASI and CrIS with a suite of insitu/ ground-based measurements under a range of environments (pollution, thermal contrast, surface properties such as sand, water) and at the single pixel scale.
- To demonstrate how individual (i.e. not co-averaged in space/time) satellite NH3 measurements can be used to help improve air quality forecasts, particularly with respect to short-term (daily/weekly) spatiotemporal variations.
- To link NH3 measurements at the individual overpass “snapshot” times with the broader temporal patterns of emissions/concentrations throughout the day/night.
In addition, he is contributing to the following Tiger Teams:
- Supporting the Use of Satellite Data in Regional Haze Planning, led by Arlene Fiore, by using satellite ammonia measurements to constrain spatial and temporal patterns of ammonia emissions.
- Air Quality and Health Burden of 2017 California Wildfires, led by Susan O’Neill, by examining satellite measurements of ammonia emissions from fires, which are important sources of ammonium nitrate in the atmosphere
- Demonstration of the Efficacy of Environmental Regulations in the Eastern US, led by Bryan Duncan and Jason West, by examining long-term trends of ammonia through satellite and in comparison to limited spatial networks
- Supporting the Use of Satellite Data in State Implementation Plans (SIPS), led by Arlene Fiore, by developing a high-level primer on satellite measurements of ammonia, designed for those who are unfamiliar with these datasets and their capabilities
- High Resolution Paticulate Matter Data for Improved Satellite-Based Assessments of Community Health, led by Patrick Kinney.
Spatiotemporal variability of ammonia through syntheses of in-situ-, ground-based, and remote sensing measurements
From Agricultural Ammonia to Volcanic Sulfur Satellite Measurements to Improve Emissions Inventories
Kang Sun, Lei Tao, David J. Miller, Da Pan, Levi M. Golston, Mark A. Zondlo, Robert J. Griffin, H. W. Wallace, Yu Jun Leong, M. Melissa Yang, Yan Zhang, Denise L. Mauzerall, and Tong Zhu, Environmental Science & Technology