Towards the quantification of emission ratios between CO2 and co-emitted species: what can we learn about sectoral activities?
Dien Wu, Caltech, dienwu@caltech.edu (Presenter)
Paul O. Wennberg, Caltech, wennberg@gps.caltech.edu
Junjie Liu, JPL, junjie.liu@jpl.nasa.gov
Paul I. Palmer, University of Edinburgh, pip@ed.ac.uk
Joshua L. Laughner, Caltech, jlaugh@caltech.edu
Robert R. Nelson, Jet Propulsion Laboratory, robert.r.nelson@jpl.nasa.gov
Tomohiro Oda, USRA, toda@usra.edu
Annmarie Eldering, Jet Propulsion Laboratory / Caltech, annmarie.eldering@jpl.nasa.gov
CO2 and air pollutants (e.g., CO and NOx) are co-emitted by many sources of combustion and are often measured simultaneously through various observational platforms. Previous efforts have combined satellite observations of multiple trace gases to determine combustion efficiency. However, only a very few of these studies have moved beyond reporting ratios of atmospheric concentrations. Factors that are essential for interpreting these ratios, including the consideration of meteorological and chemical conditions; differences in the overpass time and vertical sensitivity of satellite retrievals, were often ignored or simplified in prior work. Here, we extend an established modeling approach for estimating space-based CO2 emissions to calculate emissions of co-emitted species from a few data-rich cities. Specifically, we leverage column retrievals from the Snapshot Area Mapping mode of OCO-3 and TROPOMI and a Lagrangian atmospheric transport model to investigate the source-sounding relationship. We illustrate that these emissions and emission ratios (ER) are related to sectoral activities and use this information to address inter-city and intra-city variations in ERs.
Poster: Poster_Wu__124_25.pdf
Presentation Type: Poster
Session: 3.2a Observations to quantify hot spots and local/urban emissions
Session Date: Wednesday (6/16) 9:45 AM