Figure 5.
Response of atmospheric oxidizing capacity and gaseous oxidation products to synergetic emission reduction of VOCs and NOx in eastern China. a–f, EKMA isopleths of relative changes of O3, NO3 radical, H2SO4, N2O5, HNO3 and Arom_op as a function of VOCs and NOx emission reduction in eastern China during the COVID-19 lockdown period. Note: eastern China is defined as the domains of 30°N–40°N, 110°E–120°E. Arom_op means oxidization products of aromatics. The open circles marked in the figures indicate the averaged emission reduction rate of VOCs and NOx during the COVID-19 lockdown period. The crosses indicate the matrix of the simulation scenarios to generate these contour plots.