2021
DOI: 10.5194/gmd-14-2939-2021
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Variational regional inverse modeling of reactive species emissions with PYVAR-CHIMERE-v2019

Abstract: Abstract. Up-to-date and accurate emission inventories for air pollutants are essential for understanding their role in the formation of tropospheric ozone and particulate matter at various temporal scales, for anticipating pollution peaks and for identifying the key drivers that could help mitigate their concentrations. This paper describes the Bayesian variational inverse system PYVAR-CHIMERE, which is now adapted to the inversion of reactive species. Complementarily with bottom-up inventories, this system a… Show more

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Cited by 14 publications
(24 citation statements)
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“…The ability to track large-scale budgets of FF emissions over longer time periods relies on complementary observations of FF emission tracers. These tracers, such as the 14 CO 2 measurements considered here, may help filter a relatively low FF signal from the biogenic signal, which is generally much larger over long distances (Pinty et al, 2017;Palmer et al, 2006;Fortems-Cheiney et al, 2021;Sadiq et al, 2021). CO 2 and 14 CO 2 ground-based networks could also reinforce the constraint on the FF CO 2 emission estimates during the few hours before the satellite overpass.…”
Section: Methodology Of the Inversionmentioning
confidence: 87%
“…The ability to track large-scale budgets of FF emissions over longer time periods relies on complementary observations of FF emission tracers. These tracers, such as the 14 CO 2 measurements considered here, may help filter a relatively low FF signal from the biogenic signal, which is generally much larger over long distances (Pinty et al, 2017;Palmer et al, 2006;Fortems-Cheiney et al, 2021;Sadiq et al, 2021). CO 2 and 14 CO 2 ground-based networks could also reinforce the constraint on the FF CO 2 emission estimates during the few hours before the satellite overpass.…”
Section: Methodology Of the Inversionmentioning
confidence: 87%
“…The ability to track large-scale budgets of FF emissions over longer time periods relies on complementary observations of FF emission tracers. These tracers, such as the 14 CO 2 measurements considered here, may help filter a relatively low FF signal from the biogenic signal which is generally much larger over long distances (Pinty et al, 2017;Fortems-Cheiney et al, 2021). CO 2 and 14 CO 2 ground-based networks could also reinforce the constraint on the FF CO 2 emission estimates during the few hours before the satellite overpass.…”
Section: Methodology Of the Inversionmentioning
confidence: 88%
“…DGVMs, bookkeeping models, see Table 2). TD approaches include both high spatial resolution regional inversions (CarboScopeReg, EUROCOM (Monteil et al, 2020), inversions based on the CIF-CHIMERE system (Berchet et al, 2021) and LUMIA) and coarser spatial resolution global inversions (GCP 2021: Friedlingstein et al, 2022. Most of the inversions were carried out for CO2 land emissions, with only a single inversion for CO2 fossil emissions (CIF-CHIMERE).…”
Section: Co2 Data Sources and Estimation Approachesmentioning
confidence: 99%
“…A methodology for reconciling LULUCF country estimates from the FAOSTAT datasets with the NGHGIs is presented in Grassi et al (2022a) and Grassi et al (in prep) for the global scale. 2022a)); 2) for sector-specific models, in particular for cropland and grassland, improving treatment of the contribution of soil organic carbon dynamics to the budget; 3) for TD estimates, using the recently developed Community Inversion Framework (Berchet et al, 2021) to better assess the different sources of uncertainties from the inversion set-ups (model transport, prior fluxes, observation networks), 4) standardize methods to compare datasets with and without interannual variability, and 5) develop a clear way to report key system boundary, data, or definitional issues, as it often necessary to have deep understanding of each estimate to know how to do a like-for-like comparison.…”
Section: Summary and Concluding Remarksmentioning
confidence: 99%
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