Fig. 5: Comparisons of marine isoprene flux and AOD with monthly tropospheric column densities of NO₂ and ozone in CEPO from August 2015 to December 2020.

The data were grouped into 300 × 400 bins with data counts no less than 100 (Supplementary Fig. 7). a NO2 is likely to determine the enhancement rate of AOD from marine isoprene in CEPO. The dashed line represents the regression line of binned data with NO₂ column densities higher than 2.5 × 10¹⁴ molecules cm⁻², and the solid line represents that with NO₂ column densities lower than 2.4 × 10¹⁴ molecules cm⁻². b Lower ozone abundances were observed when marine isoprene emission and AOD were both higher.