Figure 2 | Scientific Reports

Figure 2

From: Dominance of the residential sector in Chinese black carbon emissions as identified from downwind atmospheric observations during the COVID-19 pandemic

Time series of (a) BC mass concentrations and (b) CO mixing ratios from observations (dark colors) and model simulations (light colors) during Jan–Apr in 2020 and 2019 (c, d). The estimated baseline levels are also shown. The hours with arrival of air masses from China are indicated with green vertical bars. Note that the cases from China but via Korea are not included to avoid false assignment. Light blue lines indicate cases with non-negligible wet deposition.