EGU21-7979, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-7979
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

CO2 temporal variability over Mexico City metropolitan area  from ground-based FTIR column measurements

Noémie Taquet1, Wolfgang Stremme1, Eugenia González del Castillo1, Alejandro Bezanilla1, Michel Grutter1, Thomas Blumenstock2, Frank Hase2, Darko Dubravica2, Edouard Blandin3, Morgan Lopez3, and Michel Ramonet3
Noémie Taquet et al.
  • 1Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, México, Mexico City, Mexico (noemie@atmosfera.unam.mx)
  • 2Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
  • 3Laboratoire des Sciences du Climat et de l'Environnement/Institut Pierre Simon Laplace (LSCE/IPSL), Gif-sur-Yvettes, France.

About seventy-five percent of the global carbon dioxide emissions from fossil fuel come from cities. Reducing anthropogenic greenhouse gas emissions, in particular in developing countries, is a major concern for local, national and international policies. Different mitigation strategies are and will be implemented to reduce greenhouse gas emissions, and the evaluation of their success and their perennization depends on the ability to continuously measure and quantify the effects at different spatial and temporal scales.

Using continuous solar absorption Fourier transform Spectroscopy (FTIR) column measurements in both urban and background environments over the Mexico City metropolitan area, together with in situ datasets, we explore the spatial and temporal variability of the CO2 concentration over the 5 last years in the region. Measurements were performed from three permanent stations equipped with high and low spectral resolution FTIR spectrometers since 2012, 2016 and 2018, respectively, the first is part of the NDACC network while the other two contribute to the COCCON international initiative.

In the frame of the Mexico City’s Regional Carbon Impacts (MERCI-CO2) project, 4 complementary sites equipped with EM27/Sun instruments were temporarily implemented within the megacity since autumn 2020. In particular, our time series encompass the COVID shutdown in MCMA. In this contribution we present results of the long term measurements in background and urban environment, intercomparison measurements, and preliminary results of the temporary MERCI-CO2 stations. In addition we report about the obstacles and opportunities of this intensive measurement campaign.

How to cite: Taquet, N., Stremme, W., González del Castillo, E., Bezanilla, A., Grutter, M., Blumenstock, T., Hase, F., Dubravica, D., Blandin, E., Lopez, M., and Ramonet, M.: CO2 temporal variability over Mexico City metropolitan area  from ground-based FTIR column measurements, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-7979, https://doi.org/10.5194/egusphere-egu21-7979, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.