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Towards improving current estimates of CO2 emissions and sinks in the Aix-Marseille metropolis area, France, and developing virtuous CO2 mitigation scenarios in link with local stakeholders and socioeconomic actors

Résumé : Most of the world population leaves in urbanized areas, and this is expected to expand rapidly in the next decades. Cities and their industrial facilities are estimated to emit more than 70% of fossil fuel CO2. Still, these estimates, mostly based on bottom-up emission inventories, need to be verified at the city scale. Atmospheric top-down approaches are a tool of choice in this sense. They rely mostly on continuous atmospheric CO2 measurements inside and outside of the studied urbanized area to catch the urban plume and its variability (either from in-situ, remote sensing or airborne instrumentation), on the use of emission tracers such as carbon monoxide and black carbon for combustion processes, of volatile organic compounds and of carbon isotopes to distangle the contribution of natural, modern and fossil fluxes, on mass balance approaches which needs measurements of the atmospheric boundary layer height, and on direct and inverse modeling frameworks. Furthermore, as they represent the main anthropogenic CO2 emission sector, cities and industrial facilities are strategic places where actions on mitigating CO2 emissions should be undertaken in priority.
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https://hal.archives-ouvertes.fr/hal-03368152
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Submitted on : Monday, October 18, 2021 - 8:47:27 AM
Last modification on : Thursday, November 17, 2022 - 4:12:06 AM

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Irène Xueref-Remy, Brian Nathan, Mélissa Milne, Ludovic Lelandais, Aurélie Riandet, et al.. Towards improving current estimates of CO2 emissions and sinks in the Aix-Marseille metropolis area, France, and developing virtuous CO2 mitigation scenarios in link with local stakeholders and socioeconomic actors. EGU 2021, European Geosciences Union General Assembly, Apr 2021, Online, Austria. 2p, ⟨10.5194/egusphere-egu21-12629⟩. ⟨hal-03368152⟩

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