Fig. 6: Stratospheric contributions to the overall ozone enhancement during the CLD over northern China (see Eq. (7) in “Methods”; color-coded circles placed at the locations of selected cities, unit: %).
From: Stratospheric influences on surface ozone increase during the COVID-19 lockdown over northern China
The numbers within color-coded circles indicate the injected stratospheric ozone concentrations scaled over the entire CLD period (i.e., \(\frac{{\boldsymbol{\Delta }}{{{\boldsymbol{O}}}_{{\boldsymbol{3}}}}^{{\boldsymbol{strat}}}}{{{\boldsymbol{T}}}_{{\boldsymbol{CLD}}}}\), \({{\boldsymbol{T}}}_{{\boldsymbol{CLD}}}\) is the time length of the CLD; unit: ppbv). See Table 2 for the abbreviations of the cities’ names.
