Figure 1: The surface level distribution of PAN for the present scenario during (a) June-July-August (J-J-A), (b) December-January-February (D-J-F). The percentage changes of surface PAN between the base run and isoprene HOx recycling during (c) J-J-A, (d) D-J-F. (Note: Percentage change = (STOCHEM-ISOP - STOCHEM-base)*100/STOCHEM-base).