GOTHAAM Campaign: Preparation, Testing, and Evaluation of NCAR's Atmospheric Odd Nitrogen 4 Channel Chemiluminescence Instrument for Measuring NOx, NOy, and O3 in the New York Metropolitan Area
Robinson, M., Franchin, A., Cho, C., Gabbard, S. G., Owen, C.. (2025). GOTHAAM Campaign: Preparation, Testing, and Evaluation of NCAR's Atmospheric Odd Nitrogen 4 Channel Chemiluminescence Instrument for Measuring NOx, NOy, and O3 in the New York Metropolitan Area. , doi:https://doi.org/10.5065/qvbx-k903
| Title | GOTHAAM Campaign: Preparation, Testing, and Evaluation of NCAR's Atmospheric Odd Nitrogen 4 Channel Chemiluminescence Instrument for Measuring NOx, NOy, and O3 in the New York Metropolitan Area |
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| Genre | Manuscript |
| Author(s) | Mia Robinson, Alessandro Franchin, Changmin Cho, Steve G. Gabbard, Courtney Owen |
| Abstract | Nitrogen oxides (NOx=NO + NO2), reactive nitrogen species (NOy= NO+ NO2+ HNO3+N2O5+ ClONO2+PAN+...), and ozone (O3) are key atmospheric pollutants that play a central role in boundary layer chemistry. They drive processes such as ozone production and secondary aerosol formation, significantly influencing air quality and weather. New York City is a megacity with significant biogenic, urban, and marine originating emissions, making it a good candidate for studying the evolution of NOx, NOy and O3. The Greater New York Oxidant Trace gas Halogen and Aerosol Airborne Mission (GOTHAAM) campaign aims to provide a comprehensive dataset of airborne in situ measurements from the NSF NCAR C-130 aircraft to investigate the atmospheric chemical processes of the northeastern U.S. We used NCAR's Atmospheric Odd Nitrogen (A.O.N) 4-Channel Chemiluminescence Instrument, known as the NOxyO3, to measure NOx, NOy, and O3 over the New York City area. The objective of this investigation is to see what A.O.N can reveal about the vertical and spatial NOx, NOy, and O3 distributions in the greater New York area. Here we describe the preparation, testing, and preliminary results from A.O.N's measurements during the GOTHAAM campaign. This includes calibrations, daily test runs, plane worthiness standards, and data conversions. The first research flight (RF01) presented relatively clean conditions with a plume of NOx and NOy originating from the New York City area and moving southwest in addition to elevated O3 concentrations at moderate heights. These preliminary findings suggest our measurements will help to elucidate the effects of the interactions of the biogenic and marine sources with the urban pollution coming from human activities in the New York metropolitan area. |
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| Publication Date | Aug 1, 2025 |
| Publisher's Version of Record | https://doi.org/10.5065/qvbx-k903 |
| OpenSky Citable URL | https://n2t.net/ark:/85065/d7zk5n3s |
| OpenSky Listing | View on OpenSky |
| ACOM Affiliations | ESS |