Article Dans Une Revue Urban Climate Année : 2025

Estimation of space heating CO 2 emissions based only on CO 2 fluxes observations

Résumé

Heating buildings is a significant contributor to CO 2 emissions in cities located at mid-and high-latitudes. This study aims to enhance our understanding of the average daily cycle and interseasonal variability of CO 2 emissions from space heating. To achieve this goal, we have developed a methodology solely relying on observations to identify the contribution of space heating to CO 2 fluxes measured in the urban inertial sublayer. This method offers two main advantages. Firstly, it allows for the estimation of space heating contribution with high frequency, facilitating the analysis of its daily cycle. Secondly, our estimation is independent of other methods that do not rely on observations, such as modeling or fuel-consumption based approaches.Our methodology was developed using original CO 2 flux data measured at rooftop level. Utilizing such data raises theoretical questions. However, the results demonstrate that with adapted processes (non-rotation of data and the exclusion of data with excessively high absolute vertical speeds), the measurements are entirely valid. Our estimation is consistent with estimations made using established methods, such as numerical modeling with the urban canopy model TEB, Heating Degree Days, and gas consumption methods.
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hal-04891194 , version 1 (17-01-2025)

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Marine Goret, Valéry Masson, Marie-Pierre Moine, William Maurel, Dominique Legain, et al.. Estimation of space heating CO 2 emissions based only on CO 2 fluxes observations. Urban Climate, 2025, 59, pp.102255. ⟨10.1016/j.uclim.2024.102255⟩. ⟨hal-04891194⟩

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