Fig. 5From: Quantitative evaluation of mixed biomass burning and anthropogenic aerosols over the Indochina Peninsula using MERRA-2 reanalysis products validated by sky radiometer and MAX-DOAS observationsHYSPLIT frequency plot of five-day backward trajectories in every 6Â h at the Phimai site from 500Â m in October from 2009 to 2020. Red star: Phimai site. The red box indicates southern ChinaBack to article page