CO2 Emissions Estimate From Mexico City Using Ground- and Space-Based Remote Sensing
Por:
Che K., Lauvaux T., Taquet N., Stremme W., Xu Y., Alberti C., Lopez M., García-Reynoso A., Ciais P., Liu Y., Ramonet M., Grutter M.
Publicada:
1 ene 2024
Resumen:
The Mexico City Metropolitan Area (MCMA) stands as one of the most densely populated urban regions globally. To quantify the urban (Formula presented.) emissions in the MCMA, we independently assimilated observations from a dense column-integrated Fourier transform infrared (FTIR) network and OCO-3 Snapshot Area Map observations between October 2020 and May 2021. Applying a computationally efficient analytical Bayesian inversion technique, we inverted for surface fluxes at high spatio-temporal resolutions (1-km and 1-hr). The fossil fuel (FF) emission estimates of 5.08 and 6.77 Gg (Formula presented.) /hr reported by the global and local emission inventories were optimized to 4.85 and 5.51 Gg (Formula presented.) /hr based on FTIR observations over this 7 month period, highlighting a convergence of posterior estimates. The modeled biogenic flux estimate of -0.14 Gg (Formula presented.) /hr was improved to -0.33 to -0.27 Gg (Formula presented.) /hr, respectively. It is worth noting that utilizing observations from three primary sites significantly enhanced the accuracy of estimates (13.6 (Formula presented.) 29.2%) around the other four. Using FTIR posterior estimates can improve simulation with the OCO-3 data set. OCO-3 shows a similar decreasing trend in FF emissions (from 6.37 Gg (Formula presented.) /hr to 6.36 and 5.04 Gg (Formula presented.) /hr) as FTIR, but its correction trends for biogenic sources differ, changing from 0.37 to 0.48 Gg (Formula presented.) /hr. The primary reason is OCO-3's lower temporal sampling density. Aligning the FTIR inversion timing with that of OCO-3 yielded comparable corrections for FF emissions, yet discrepancies in biogenic emissions persisted, which can be attributed to their different sampling locations in the rural region and discrepancy in X (Formula presented.) observations. Our findings mark a significant step toward validating OCO-3 and FTIR inversion results in metropolitan region. © 2024. The Author(s).
Filiaciones:
Che K.:
Laboratoire des Sciences du Climat et de l’Environnement, IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette Cedex, France
Groupe de Spectrométrie Moléculaire et Atmosphérique, University of Reims Champagne Ardenne, Reims, France
Lauvaux T.:
Groupe de Spectrométrie Moléculaire et Atmosphérique, University of Reims Champagne Ardenne, Reims, France
Taquet N.:
Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City, Mexico
Stremme W.:
Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City, Mexico
Xu Y.:
Laboratoire des Sciences du Climat et de l’Environnement, IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette Cedex, France
Alberti C.:
Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
Lopez M.:
Laboratoire des Sciences du Climat et de l’Environnement, IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette Cedex, France
García-Reynoso A.:
Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City, Mexico
Ciais P.:
Laboratoire des Sciences du Climat et de l’Environnement, IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette Cedex, France
Liu Y.:
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Ramonet M.:
Laboratoire des Sciences du Climat et de l’Environnement, IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette Cedex, France
Grutter M.:
Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City, Mexico
hybrid, All Open Access; Hybrid Gold Open Access
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