Articles | Volume 18, issue 22
Atmos. Chem. Phys., 18, 16271–16291, 2018
https://doi.org/10.5194/acp-18-16271-2018
Atmos. Chem. Phys., 18, 16271–16291, 2018
https://doi.org/10.5194/acp-18-16271-2018

Research article 16 Nov 2018

Research article | 16 Nov 2018

Southern California megacity CO2, CH4, and CO flux estimates using ground- and space-based remote sensing and a Lagrangian model

Jacob K. Hedelius et al.

Data sets

TCCON data from Armstrong Flight Research Center L. Iraci, J. Podolske, P. Hillyard, C. Roehl, P. O. Wennberg, J.-F. Blavier, J. Landeros, N. Allen, D. Wunch, J. Zavaleta, E. Quigley, G. Osterman, R. Albertson, K. Dunwoody, and H. Boyden https://doi.org/10.14291/tccon.ggg2014.edwards01R1/1255068,

TCCON data from California Institute of Technology P. O. Wennberg, D. Wunch, C. Roehl, J.-F. Blavier, G. C. Toon, and N. Allen https://doi.org/10.14291/tccon.ggg2014.pasadena01.R1/1182415

OCO-2 Level 2 bias-corrected XCO2 and other select fields from the fullphysics retrieval aggregated as daily files OCO-2 Science Team, M. Gunson, and A. Eldering https://doi.org/10.5067/XR7ZWYSKP7D0

ODIAC Fossil Fuel CO2 Emissions Dataset (Version ODIAC2016) T. Oda, and S. Maksyutov https://doi.org/10.17595/20170411.001

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Short summary
Human activities can cause concentrated emissions of greenhouse gases and other pollutants from cities. There is ongoing effort to convert new satellite observations of pollutants into fluxes for many cities. Here we present a method for determining the flux of three species (CO2, CH4, and CO) from the greater LA area using satellite (CO2 only) and ground-based (all three species) observations. We run tests to estimate uncertainty and find the direct net CO2 flux is 104 ± 26 Tg CO2 yr−1.
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