B066-0002
Cluster Analysis of N2O Enhancements Observed by ATom

Friday, 11 December 2020
Poster
Ethan Manninen1, Yenny Gonzalez Ramos1, Roisin Commane2, Bruce C Daube1, J Barry McManus3, Kathryn McKain4, James W Elkins5, Fred L Moore5, Colm Sweeney6, Paul O Wennberg7, Karl D Froyd8, Jose L Jimenez9, Eric A Ray10 and Steven C Wofsy1, (1)Harvard University, John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (2)Columbia University in the City of New York, New York, NY, United States, (3)Aerodyne Research Inc., Billerica, MA, United States, (4)NOAA ESRL Global Monitoring Division, Boulder, CO, United States, (5)NOAA, Boulder, CO, United States, (6)NOAA Global Monitoring Laboratory, Boulder, CO, United States, (7)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, (8)NOAA/CIRES, Boulder, CO, United States, (9)University of Colorado at Boulder, Cooperative Institute for Research in Environmental Sciences (CIRES) and Department of Chemistry, Boulder, CO, United States, (10)NOAA/CIRES, Boulder, United States
Abstract:
Atmospheric nitrous oxide (N2O) is the third most important greenhouse gas, and with CFC concentrations decreasing in the atmosphere, it catalyzes the primary chemical sink for stratospheric ozone. The Atmospheric Tomography Mission (ATom) was a series of global flight campaigns that measured N2O and other trace species. This study applies principal component analysis (PCA) to trace species data from N2O enhanced observations in order to cluster N2O emissions (Figure 1). Back trajectories for the resulting clusters are calculated using the TRAJ3D model. The clustered footprints geographically align with coastal upwelling, biomass burning, and petroleum industry N2O sources (Figures 2,3,4). Finally, this study quantitatively compares the ATom observed emissions from each of these source processes with their prior emissions in the region. This work increases understanding of the geography, relative importance, and chemical signatures of N2O source processes.
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