Spatial Distribution and Temporal Trend of Tropospheric NO₂ over the Wanjiang City Belt of China

Figure 8

Fractions of OMI-derived tropospheric NO₂ columns over WCB in the total tropospheric NO₂ columns of Anhui from 2005 to 2016. Fraction of tropospheric NO₂ columns is calculated as the ratio of the sum of annual averaged tropospheric NO₂ columns in WCB to the sum of annual averaged tropospheric NO₂ columns in Anhui from 2005 to 2016 (%).