Validating emission fluxes calculation of anthropogenic greenhouse gas emissions Irene Monreal Campos 1 , Stéphane Bauguitte 1 , Dave Sproson 1 , Tom Moore 2 , James Lee 2 , Ruth Purvis 2 1 FAAM Airborne Laboratory, National Centre for Atmospheric Science, UK, 2 National Centre for Atmospheric Science, University of York, UK Carbon dioxide and methane are the two most significant contributors to climate change and warming, with the largest radiative forcing effect linked to human activity since the pre-industrial era. Accurate quantification of their emissions remains challenging due to variables that can impact measurements, including wind conditions, boundary layer stability, and the presence of multiple sources. This project aims to estimate emission fluxes from various industrial point sources, using airborne measurements of anthropogenic carbon dioxide and methane plumes and the ADMS 6 dispersion model. To validate the ADMS 6 derived fluxes, estimates will be compared with the flux values determined with the well- established peer-reviewed mass-balance methodology1-4 to assess uncertainties. We showcase several emission scenarios sampled by the FAAM Airborne Laboratory, to study both on- and off-shore industrial installations, including oil and gas extraction facilities, landfill and incinerator, steelworks and power generation plants. References 1. Lee, James D. et al. (Mar. 2018). “Flow rate and source reservoir identification from airborne chemical sampling of the uncontrolled Elgin platform gas release”. In: Atmospheric Measurement Techniques 11.3, pp. 1725–1739. ISSN: 1867-8548. DOI: 10.5194/amt-11-1725-2018. 2. France, James L. et al. (Jan. 2021). “Facility level measurement of offshore oil and gas installations from a medium-sized airborne platform: method development for quantification and source identification of methane emissions”. In: Atmospheric Measurement Techniques 14.1, pp. 71–88. ISSN: 1867-8548. DOI: 10.5194/am-14-71-2021. 3. Foulds, Amy et al. (Apr. 2022). “Quantification and assessment of methane emissions from offshore oil and gas facilities on the Norwegian continental shelf”. In: Atmospheric Chemistry and Physics 22.7, pp. 4303–4322. ISSN: 1680-7324. DOI: 10.5194/acp-22-4303-2022. 4. Pühl, M et al. (2023). “Aircraft-based mass balance estimate of methane emissions from offshore gas facilities in the Southern North Sea”. In: Atmospheric Chemistry and Physics Discussions 2023, pp. 1–32. DOI: 10.5194/acp-2022-826.
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