Atmospheric Chemistry and Composition Group
Prof. Mark A. Zondlo
Department of Civil and Environmental Engineering
Center for Mid-Infrared Technologies for Health and the Environment
Princeton University

Welcome to the Zondlo group website!

My group studies how human activities and natural systems impact the composition and chemistry of the atmosphere and the subsequent effects on air quality, climate, and ecosystem health. Measurements provide critical constraints on emission inventories and model output, and to this end, we develop and deploy novel sensors that provide observations at unprecedented scales in space and time. We also synthesize our field measurements with satellite products to bridge scales from hours to years and from neighborhoods to the globe. My group conducts the measurements as part of larger field studies and works closely with laboratory and modeling teams in these campaigns. Research foci include urban emissions of greenhouse gases and air pollutants, trace gases important to aerosol and cloud formation, and fluxes of nitrogen and carbon to/from the atmosphere in managed (agriculture) and natural systems. In short, the Earth’s atmosphere is our laboratory - it is complex, dynamic, and full of mysteries.

Recent News Follow Us On Twitter

May 17, 2022: Xuehui Guo successfully defends Ph.D. dissertation

Sep 9, 2021: Daniel Moore awarded NASA Earth and Space Science Fellowship

Aug 22, 2021: Vlad Sevostianov awarded the prestigious 2021 DoD National Defense Science and Engineering Graduate (NDSEG) Fellowship

Aug 15, 2021: Vlad Sevostianov joined the group!

Aug 6, 2021: First phase field sampling finished for agricultural waste and wastewater emissions in California and the Mid-Atlantic

Feb 22, 2021: Nathan Li's paper about low-cost CH4 sensors was featured as editor's pick in Optics Express.


Earth's Last Frontier: The Atmosphere

Using Mid-Infrared Lasers:
MIRTHE Student Led Independent Project

Science at 47,000 feet: Laser hygrometer onboard the NSF Gulfstream-V research aircraft studying cloud formation.

Latest Field Campaigns

Duke Forest, 2017
Kellogg Biological Station, 2016 & 2017
Rocky Mountain National Park Study, 2015 & 2016
NOAA Marcellus (Pennsylvania), 2015 & 2016
ScaleX (Germany), 2016
NASA DISCOVER-AQ (Colorado), 2014
CARE-BEIJING-NCP (Beijing, China), 2014

Latest Publications

Ammonia Dry Deposition in an Alpine Ecosystem Traced to Agricultural Emission Hotpots
D. Pan et al., Environ. Sci. Technol, 2021.

Methane detection using an interband-cascade LED coupled to a hollow-core fiber (Editor's pick)
N. Li et al., Optics Express, 2021.

Validation of IASI satellite ammonia observations at the pixel scale using in-situ vertical profiles
X. Guo et al., J. Geophys. Res.-Atmos., 2020.

Monthly patterns of ammonia over the contiguous United States at 2 km resolution
R. Wang et al., Geophys. Res. Lett., 2020.

Air quality, nitrogen use efficiency and food security in China are improved by cost-effective agricultural nitrogen management
Y. Guo et al., Nat. Food, 2020.

Methane emissions from natural gas vehicles in China
D. Pan et al., Nat. Commun., 2020.

Variability of ammonia and methane emissions from animal feeding operations in northeastern Colorado
L. Golston et al., Environ. Sci. Technol., 2020.

Importance of Super-Emitter Natural Gas Well Pads in the Marcellus Shale
D. Caulton et al., Environ. Sci. Technol., 2019.